JP2009184407A - Friction drive conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly and surely perform a push driving in a friction drive conveying device in which a load bar 5 for friction driving which has a horizontal folded joint part 28 at the intermediate position and a travelling body 1 having a plurality of trolleys 3a which support the load bar 5 are pushed and driven through the load bar 5. <P>SOLUTION: Guide rollers 29a, 29b rotatable about a vertical axis (vertical shaft 20) are installed at or near the folded joint part 28 of the load bar 5 of the traveling body 1 for conveyance. Guide rails 32a, 32b which stop the lateral swing of the folded joint part 28 of the load bar 5 through the guide rollers 29a, 29b are disposed in the push driving district of a traveling path. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is mainly implemented as a trolley conveyor that suspends and conveys an object to be conveyed. A friction drive conveyance that uses a conveyance traveling body including a plurality of trolleys and a friction drive load bar that connects these trolleys. It relates to the device.

This type of friction drive conveying device is used as means for suspending and conveying a large-sized long object such as an automobile body. As described in Patent Document 1, it is suspended by a traveling body for conveyance. For example, four trolleys arranged in series in the running direction and folds that are suspended by these trolleys and concentric with the rotating vertical axis of each trolley. Friction having a load bar composed of a plurality of load bars connected via a curved joint part, and a friction drive wheel which is driven to rotate by being pressed against the side surface of the load bar on the traveling path side Driving means is provided. Thus, the apparatus described in Patent Document 1 is configured such that each of the plurality of transport traveling bodies on the lower side of the transport traveling body is moved to each transport travel by the transport traveling body driven by the friction drive unit. A thrust driving system that uses a body load bar to drive and push, and a rear conveying traveling body that is connected via connecting means provided at both front and rear ends of the load bar is driven by the friction driving means. It is configured so that it can be used together with the traction drive system that pulls by the front conveyance traveling body, but the thrust drive system is not necessary to connect the front and rear ends of the load bar compared to the traction drive system, The means for engaging / disengaging the connecting means and the control thereof are unnecessary, and the equipment cost can be greatly reduced.
JP 2004-25904 A

  However, although no solution is taken in Patent Document 1, if the conventional load bar is used as it is for pushing and driving, the buckling strength in the longitudinal direction of each load bar itself constituting the load bar is sufficient. Even if it is secured, the trolley position is equipped with a folding joint that allows bending rotation around the vertical axis to enable traveling along the horizontal curved path, and in particular, the trolley has a load bar. In the suspension type, the trolley itself engages so as to securely hold the vertical posture with respect to the guide rail as compared with the cart type conveyor that supports the load bar arranged on the upper side of the trolley with each trolley. Each trolley has play between the guide rails that can swing relatively horizontally in the lateral direction. When a compression external force in the length direction is applied to the load bar, the load bar may bend in the horizontal lateral direction at the position of the bending joint with the swing of the trolley. Push drive cannot be expected.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a friction drive transport apparatus that can solve the above-mentioned conventional problems, and the friction drive transport apparatus according to claim 1 refers to an embodiment described later. If it attaches | subjects and shows a code | symbol, it will consist of the conveyance traveling body 1 and the to-be-conveyed object support part (hanger 6) supported by this, and the traveling body 1 for conveyance will be at least 3 trolleys arranged in series in the traveling direction. 3a-4b, and a load bar 5 composed of a plurality of load bar units 8a-9b supported by these trolleys 3a-4b and connected via bending joints 28 that allow horizontal bending. On the traveling path side, friction drive means 13 and 36 having friction drive wheels 14 and 40 that are rotationally driven in pressure contact with the side surface 5a of the load bar 5 are disposed. The transport traveling body 1 to be propelled is A friction drive transport device configured to push and drive the immediately preceding transport travel body 1 via the load bar 5 of each transport travel body 1, the bending joint portion 28 of the load bar 5 or its Guide rollers 29a and 29b that are capable of rotating around a vertical axis (vertical shafts 20 and 24) are provided in the vicinity, and a bending joint portion of the load bar 5 is provided in the pushing drive section in the travel route. Guide rails 32a and 32b are arranged to prevent the 28 from swinging in the lateral direction through the guide rollers 29a and 29b.

  In carrying out the present invention having the above-described configuration, specifically, as described in claim 2, the guide rollers 29a and 29b are arranged around the rotation vertical axis (vertical shafts 20 and 24) of the bending joint portion 28. It is desirable that the guide rollers 29a and 29b be arranged in a pair so as to sandwich the load bar 5 therebetween.

  Further, when adopting the configuration according to the second or third aspect, specifically, as described in the fourth aspect, a pair of front and rear load trolleys 3a and 3b for supporting the object support portion as the trolley. The front and rear free trolleys 4a and 4b are provided, and the load bar 5 projects from the front and rear free trolleys 4a and 4b to three intermediate load bars 8a to 8c that connect the four trolleys 3a to 4b. The front and rear load bar units 9a and 9b are configured so that the bent joint portion 28 of the load bar 5 is configured to be bent around vertical shafts 20 and 24 protruding from the four trolleys 3a to 4b. The guide rollers 29a and 29b are rotatably supported on the vertical shafts 20 and 24 on both upper and lower sides sandwiching the load bar 5, and the front and rear end load bar units 9a and 9b Trolley 4a, these front and rear end free trolleys 4a through the vertical shaft 24 which projects from 4b, can be fixed to 4b.

  Further, as described in claim 5, the guide rails 32a and 32b are arranged in a pair of left and right sides so as to sandwich the guide rollers 29a and 29b from both left and right sides in the straight path portion in the pushing drive section in the traveling path. As described in claim 6, in the pushing drive section in the travel route, the horizontal curved route portion 35 is provided with the guide rail 32a only outside the bend of the route portion. be able to.

  According to the friction drive transport apparatus according to the present invention having the above-described configuration, the load bar of the transport traveling body pushed by the front end of the load bar of the rear transport traveling body swings the trolley in the horizontal and lateral directions. Accordingly, it is possible to reliably prevent the bending at the position of the bending joint portion from being laterally bent by the contact between the guide roller provided at the bending joint portion or a position near the bending joint portion and the guide rail on the traveling path side. Therefore, the pushing drive using the friction drive load bar can be performed smoothly and reliably. In other words, by adopting the configuration of the present invention, the friction of the thrust drive system using the load bar for friction drive, which can greatly reduce the cost as compared with the conventional load bar tow type friction drive conveying device. The drive conveyance device has become practical.

  In addition, according to the structure of Claim 2, compared with the case where a guide roller is pivotally supported by the load bar in the position away from the bending joint part, the vertical supporting shaft constituting the bending joint part is used. The guide roller can be pivotally supported, and the number of parts can be reduced and implemented at low cost, and the load bar can be effectively prevented from bending in the lateral direction at the position of the bending joint. Can do. Moreover, according to the structure of Claim 3, it can hold | maintain a trolley in a perpendicular | vertical attitude | position and can prevent more effectively that a load bar bends in the horizontal direction at the position of a bending joint part.

  Moreover, according to the structure of Claim 4, while the effect at the time of employ | adopting the structure of Claim 2 or 3 can be acquired simultaneously, the protrusion length from the front-and-rear both-ends free trolley of the front-and-rear both-ends load bar By making the length sufficiently short, even in a horizontal curved path portion having a relatively small radius of curvature, it can be reliably pushed and driven through the load bar of each transport traveling body.

  Furthermore, according to the structure of Claim 5, in the linear path part in the thrust drive area in a travel path, the thrust drive using the load bar of each conveyance traveling body is performed smoothly and reliably. According to the configuration described in claim 6, the thrust drive using the load bar of each transport traveling body is smoothly and reliably performed in the horizontal curved path portion in the thrust drive section in the travel path. Moreover, since the guide rail that contacts the guide roller on the load bar side is disposed only outside the bend of the horizontal curved path portion, the equipment cost can be reduced.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 3, reference numeral 1 denotes a transport traveling body that travels on a guide rail 2 that is horizontally installed at a predetermined height on the floor. Four trolleys that can be engaged, that is, a pair of intermediate front and rear load trolleys 3a and 3b, free trolleys 4a and 4b at both front and rear ends, a load bar 5 suspended by these four trolleys 3a to 4b, and a conveyed object It is comprised from the hanger 6 as an object support tool. The load bar 5 is coupled to three intermediate load bars 8a to 8c connecting the four trolleys 3a to 4b, and free trolleys 4a and 4b at both front and rear ends. It consists of short front and rear end load bars 9a, 9b that protrude slightly forward and backward.

  In the traveling path of the hanger constituted by the guide rails 2, the portal frame 10 is installed on the floor surface at appropriate intervals in the length direction, and the upper end rail hanging frame portion 11 of the portal frame 10 is arranged. The guide rail 2 is fixed and suspended at the center lower side. The portal frame 10 is exemplified by a trapezoidal shape in which a pair of left and right column frames 12a and 12b supporting both ends of the horizontal rail hanging frame 11 are inclined downward. The parts 12a and 12b may be parallel and vertical inverted U-shaped, or may be of a curved arch shape as a whole. Further, the portal frames 10 can be connected to each other by a connecting frame other than the guide rail 2, and a mounting base on which an operator can board for maintenance is attached to the connecting frame as necessary. it can.

  The guide rail 2 is provided with friction drive means 13 at appropriate intervals. The friction drive means 13 is well known in the art, and the friction drive wheel 14 is pressed against one of the left and right vertical side surfaces 5a and 5b (see FIG. 6) of the load bar 5 and the opposite side surface 5b. The backup roller 15 is in contact with a motor 16 that rotationally drives the friction drive wheel 14. The backup roller 15 is supported by a vertical support shaft so that it can rotate only at a fixed position on a frame 17 fixed to the guide rail 2. However, the motor 16 having the friction drive wheel 14 attached to the vertical output shaft is supported by the frame 17 so as to be movable in the horizontal and perspective directions with respect to the side surface 5a of the load bar 5, and is loaded by the spring. 5 is urged in a direction in pressure contact with the side surface 5a.

  Hereinafter, in detail, the pair of front and rear load trolleys 3a and 3b are, as shown in FIGS. 4, 5, and 7, from the lower side of the central vertical plate portion 2a of the guide rail 2 using H-shaped steel. A pair of left and right main wheels 18 rolling on a pair of left and right lower horizontal rail portions 2b projecting to the left and right sides, and a pair of left and right front and rear vertical shafts sandwiching a central vertical plate portion 2a on both the front and rear sides of the main wheel 18 A vertical shaft 20 that protrudes vertically downward is fixedly projected by a stop pin 21 at a position directly below the center of the guide rail 2. As shown in FIGS. 4, 5, and 8, the front and rear free trolleys 4a and 4b are a pair of upper and lower horizontal shaft rollers 22a that sandwich the left and right lower horizontal rail portions 2b of the guide rail 2 from both upper and lower sides. , 22b are provided at four positions on the front and rear, left and right, and two pairs of left and right front and rear vertical shaft rollers 23 sandwiching the central vertical plate portion 2a of the guide rail 2 are provided, as with the load trolleys 3a and 3b. At a position directly below the center of the rail 2, a vertical shaft 24 that protrudes vertically downward is fixedly provided by a fixing pin 25.

  Of the three intermediate load bar units 8a to 8c of the load bar 5, the intermediate load bar units 8b and 8c that connect the load trolleys 3a and 3b and the free trolleys 4a and 4b at the front and rear ends are located at positions near both ends. A vertical bending joint portion 27 that can be bent in the vertical direction is provided around the horizontal support shaft 26. The end portions adjacent to each other in the load bar length direction of each intermediate load bar unit 8a to 8c and the front and rear end load bar units 9a and 9b are vertically protruded vertically downward from the respective trolleys 3a to 4b. Are connected to each other via a horizontal bending joint portion 28 that can be bent in the horizontal direction, and only the short front and rear end load bars 9a and 9b protrude vertically downward from the free trolleys 4a and 4b at both front and rear ends. It is keyed to the vertical shaft 24 and is integrated with the front and rear load bar units 9a and 9b.

  The vertical shafts 20 and 24 projecting vertically downward from the trolleys 3a to 4b not only form the horizontal bending joint portion 28 of the load bar 5, but also a pair of upper and lower steady rests sandwiching the load bar 5 from above and below. The guide rollers 29a and 29b are supported around the vertical shafts 20 and 24 so as to be rotatable. Further, as shown in FIG. 7, the vertical shaft 20 protruding vertically downward from the pair of front and rear load trolleys 3a and 3b is longer than the steady-state guide roller 29b located below the load bar 5. The hanger hanging bracket 30 is supported on the lower end extending portion 20a of the vertical shaft 20 so as to be rotatable around the vertical shaft 20, and the pair of hanger hanging brackets 30 on the front and rear of the hanger 6 The upper frame 7 is suspended so as to be swingable in the horizontal and vertical directions via a horizontal support shaft 31 in the front-rear direction parallel to the traveling direction of the hanger.

  According to the transport traveling body 1 configured as described above, the trolleys 3a to 4b are suspended from the lower horizontal rail portion 2b of the guide rail 2 by the main wheel 18 and the upper horizontal shaft roller 22a, and left and right The pair of front and rear vertical rollers 19 and 23 are regulated in a direction parallel to the central vertical plate portion 2a of the guide rail 2, and the pair of front and rear load trolleys 3a and 3b includes a hanging hanger 6. Lifting of the guide rail to the lower horizontal rail portion 2b is prevented, and the free trolleys 4a and 4b at the front and rear ends are prevented from lifting to the lower horizontal rail portion 2b of the guide rail by the lower horizontal shaft roller 22b. . Of course, the pair of front and rear load trolleys 3a and 3b may also be provided with horizontal shaft rollers that contact the lower side of the lower horizontal rail portion 2b of the guide rail to prevent the trolleys 3a and 3b from lifting.

  In addition, the load bar 5 suspended from each of the trolleys 3a to 4b and connecting the trolleys 3a to 4b is provided with the vertical bending joint portion 27 at the position as described above. When the traveling path of the traveling body 1, that is, when the upward and downward gradient path portions exist on the guide rail 2, the trolleys 3 a to 4 b are horizontally supported by the vertical bending joint portions 27 provided in the load bar 5. It is possible to travel along an upward and downward gradient path portion of the guide rail 2 with a vertical bending motion around the 26. Further, the load bar 5 is provided with the horizontal bent joint portion 28 at the position as described above. Therefore, the travel path of the transport traveling body 1, that is, the guide rail 2 has a horizontal curved path portion. When present, each of the trolleys 3a to 4b is accompanied by a horizontal bending motion around the vertical axis 20 at the horizontal bending joint portion 28 provided in the load bar 5, and the horizontal curve of the guide rail 2 concerned. It can drive along a route part.

  When the transport traveling body 1 travels along the horizontal curved path portion, the front and rear end load bar units 9a and 9b of the load bar 5 are integrated with the free trolleys 4a and 4b at the front and rear ends as described above. Therefore, the direction is regulated in the tangential direction passing through the axis of the vertical shaft 24 of the free trolleys 4a and 4b with respect to the center line of the horizontal curved path portion, and the front and rear load bar units 9a and 9b are free trolleys. Since the protrusion length in the front-rear direction from 4a and 4b is very short, the front end surfaces of the front and rear end load bars 9a and 9b (the front and rear end surfaces of the load bar 5) are outward from the center line of the horizontal curved path portion. It will not come off. In other words, the front and rear end load bars 9a and 9b have the front and rear protrusion lengths from the free trolleys 4a and 4b, the width of the front end surface, and the radius of curvature of the horizontal curved path portion so as to be in this state. Is set.

  Thus, when each conveying traveling body 1 passes through the position of the friction drive means 13, the friction drive wheel 14 of the friction drive means 13 is in pressure contact with the side surface 5a of the load bar 5. When the wheel 14 is rotationally driven in a predetermined direction by the motor 16 at a predetermined speed, the conveyance traveling body 1 is propelled by the friction drive wheel 14 in a predetermined direction at a predetermined speed. Therefore, if the friction drive means 13 is disposed on the travel path of the transport traveling body 1 at intervals equal to or slightly shorter than the entire length of the load bar 5, each transport traveling body 1 travels at a predetermined speed without stopping. be able to. In the present invention, a pushing drive section is set in the travel route of the transport traveling body 1. In the pushing drive section, the friction drive means 13 are disposed on the entrance side and the exit side. As is conventionally known, the friction drive means 13 on the exit side is the friction drive means 13 on the entrance side. Is set to be slightly slower than the feed speed (the peripheral speed of the friction drive wheel 14), and the braking force is applied to the transport traveling body 1 fed from the thrust drive section by the friction drive means 13 on the outlet side. Set to work. That is, the friction drive means 13 on the outlet side has a braking function.

  According to the thrust drive section having the above-described configuration, the transport traveling body 1 sent into the thrust drive section by the friction drive means 13 on the entrance side is transferred from the friction drive wheel 14 of the friction drive means 13 on the entrance side to the load bar. 5 is stopped at the position where the rear end is removed, but the subsequent transport traveling body 1 is fed into the pushing drive section by the friction drive means 13 on the entrance side, whereby the load of the subsequent transport traveling body 1 is loaded. The front end of the bar 5 (the front end of the front end load bar unit 9a) pushes the rear end (the rear end of the rear end load bar unit 9b) of the load traveling body 1 stopped. . Thereafter, by repeating this action, the required number of transporting traveling bodies 1 are in a daisy chain connection state in which the front and rear ends of each load bar 5 are in contact with each other in the pushing drive section, and the friction driving means 13 on the entrance side. Thus, all the transport traveling bodies 1 in the daisy chain connected state in the thrust drive section are thrust and driven by the last transport traveling body 1 fed into the thrust drive section.

  According to the present invention, as shown in FIGS. 4 and 6 to 8, the load bar 5 is moved from above and below in each horizontal bending joint portion 28 of the load bar 5 in the push drive section. A pair of left and right steadying guide rails 32a and 32b sandwiching a pair of upper and lower steadying guide rollers 29a and 29b provided so as to be sandwiched from both left and right sides are provided, and each horizontal bending joint portion of the load bar 5 is provided. The vertical shafts 20 and 24 serving as the rotational axis of 28 are regulated and held in a vertical posture on the center line of the travel path in the thrust drive section, and the longitudinal direction (travel direction) acting on the load bar 5 by the thrust drive. The compressive force prevents the load bar 5 from bending in the horizontal direction with the horizontal swing of the trolleys 3a to 4b at the position of the horizontal bending joint portion 28. As shown in FIGS. 4 to 8, the pair of left and right guide rails 32 a and 32 b is a horseshoe shape that is fixed across the guide rail 2 at positions at appropriate intervals in the length direction of the guide rail 2. A mounting member 34 fixed to the outside of the pair of left and right guide rails 32a and 32b corresponding to each support plate 33 is attached to the support plate 33 at a predetermined position on the lower side of the guide rail 2. Can be set.

  In addition, as shown in FIG. 9, the horizontal curve path | route part 35 may be provided in said pushing drive area. A pair of left and right steadying guide rails 32a and 32b can also be arranged in the horizontal curve path section 35 in the pushing drive section. Actually, however, the horizontal curve path section in the pushing drive section In each horizontal bending joint portion 28 of the load bar 5 of each conveyance traveling body 1 driven to push in 35, the outwardly directed refractive power opposite to the side where the arc center of the horizontal curved path portion 35 is located. Therefore, as shown in the figure, the steadying guide rail 32a may be disposed only outside the horizontal curved path portion 35.

  Further, as shown in FIG. 6, the front and rear end faces of the load bar 5, that is, the front end faces of the front and rear end load bars 9a and 9b are formed in an arc shape protruding with an appropriate curvature in plan view. In the push drive at the straight path portion in the push drive section, push drive can be performed at the center position in the width direction of the front end surfaces of the front and rear load bar units 9a, 9b, and the push drive section shown in FIG. When pushing and driving at the horizontal curved path portion 35, the front and rear both ends of the load bar unit 9a, 9b can be pushed and driven at a position closer to the center position than the end in the width direction of the front end surface. Pushing and driving can be performed smoothly and smoothly without applying an excessive bending force in the horizontal direction to the bars 9a and 9b.

  The friction drive means provided particularly on the entrance side of the push drive section has a large friction drive force according to the total length of the push drive section, that is, the number of transporting traveling bodies 1 to be pushed and driven. Required. Accordingly, instead of the conventionally known friction drive means 13 shown in FIGS. 1 to 3, a friction drive means capable of frictionally driving the conveying traveling body 1 with a large friction drive force, for example, the friction drive means 36 shown in FIGS. It is desirable to use

  The friction drive means 36 includes a pair of left and right drive units 37A and 37B disposed on the left and right sides of the guide rail 2, and a biasing means 38 common to the drive units 37A and 37B. Both drive units 37A and 37B are symmetrically supported by a common frame 39 mounted on the guide rail 2, and friction drive wheels 40 that are in pressure contact with the left and right side surfaces 5a and 5b of the load bar 5, respectively. Each of these friction drive wheels 40 is provided with a motor 41 attached to an output shaft protruding vertically downward. The motor 41 of each drive unit 37A, 37B is supported on the common frame 39 by a swinging body 43 that is pivotally supported by a vertical support shaft 42 on the left and right sides of the guide rail 2 so as to be swingable in the horizontal direction. . The swinging body 43 includes an upper swinging plate 44 pivotally supported by the vertical support shaft 42 so as to be swingable in the horizontal direction and a pair of front and rear support members 45a and 45b below the upper swinging plate 44. The motor 41 is supported on the upper side of the lower swing plate 46, and the friction drive wheel on the lower side of the lower swing plate 46. 40 is arranged. The free end side of the upper rocking plate 44 of the rocking body 43 is supported by two horizontal shaft rollers 47 that are pivotally supported in parallel with the common frame 39, and includes the rocking body 43 and the friction drive wheel 40. Further, the motor 41 can be smoothly horizontally swung while maintaining a vertical posture. The common biasing means 38 is composed of one fluid pressure cylinder unit 48, and the cylinder body 48a of the fluid pressure cylinder unit 48 projects upward on the free end side of the swinging body 43 of one drive unit 37A. The piston rod 48b of the fluid pressure cylinder unit 48 is perpendicular to the support bracket 51 projecting upward on the free end side of the swinging body 43 of the other drive unit 37B. They are connected by a support shaft 52.

  Therefore, by supplying fluid pressure to the cylinder body 48a of the fluid pressure cylinder unit 48 in the direction in which the piston rod 48b is contracted, the motor 41 and the friction drive wheel 40 of both the drive units 37A and 37B are connected via the oscillator 43. By swinging horizontally around the vertical support shaft 42 in a direction approaching each other, the friction drive wheels 40 of both drive units 37A and 37B are simultaneously pressed against the left and right side surfaces 5a and 5b of the roller rail of the transport traveling body 1. Therefore, by operating the motors 41 of both drive units 37A and 37B to rotationally drive the friction drive wheels 40, the transport traveling body 1 can be strongly propelled through the load bar 5. When a larger friction driving force is required, two or a plurality of friction driving means 36 having the above configuration can be arranged in series in the traveling path direction. In this case, it is also possible to extend the common frame 39 in the traveling path direction and to arrange a plurality of sets of drive units 37A and 37B in one common frame 39 in series in the traveling path direction.

  As shown in FIGS. 2 and 3, the transport traveling body 1 in this embodiment is of a type in which the hanger 6 is suspended by the load trolleys 3 a and 3 b, so that the hanger 6 is hung on the upper frame 7 of the hanger 6. In the section for preventing the swinging of the transported object (hanger 6), such as a work section for the transported object supported by the hanger 6, while providing the anti-swing guide roller unit 53, The hanger anti-swaying guide rail 54 that engages with the anti-swaying guide roller unit 53 can be installed using the portal frame 10 that supports the guide rail 2.

  In the above embodiment, the four trolleys 3a to 4b are used, and the hanger 6 that is the object to be conveyed is suspended by the pair of intermediate front and rear load trolleys 3a and 3b. It is also possible to connect a free trolley to only one of the pair of front and rear load trolleys 3a, 3b that suspends 6 by a load bar, and to form a transport traveling body with three trolleys. Further, when the length of the transported object in the transport direction is short, the transported object support (hanger 6) is suspended from one load trolley, and is connected to the one load trolley via a load bar. It is also possible to provide a free trolley and form a transport traveling body with at least two trolleys. In any case, the length of the load bar between the free trolley and the load trolley is set so that the objects to be conveyed supported by the hanger 6 do not collide with each other when the conveying traveling body 1 is driven to push. It ’s fine. Of course, also when the transport traveling body 1 is constituted by these three or two trolleys, the front and rear ends of the load bar are short front and rear end load bars 9a and 9b that protrude slightly from the trolley located at the front and rear ends. Are preferably connected in the manner of the above embodiment.

It is a side view which shows the traveling body for conveyance in a driving | running route, and a friction drive means. It is a top view same as the above. It is a rear view same as the above. It is a side view which shows the traveling body for conveyance connected by the A-B line and the A'-B 'line. It is a top view which shows the traveling body for conveyance connected by the AB line and the A'-B 'line. It is a top view which shows the load bar of the traveling body for conveyance connected by the AB line and the A'-B 'line. It is a vertical front view in the road trolley position of the conveyance traveling body in a travel route. It is a vertical front view in the free trolley position of the traveling body for conveyance in a driving path. It is a top view which shows the state of the load bar of the conveyance travel body in a pushing drive state in a horizontal curve path | route part. It is a top view which shows an example of a friction drive means. It is a vertical front view which shows a friction drive means same as the above. It is a vertical side view which shows a friction drive means same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transporting body 2 Guide rail 3a, 3b Load trolley 4a, 4b Free trolley 5 Load bar 6 Hanger (conveyed object support tool)
8a to 8c Intermediate load bar unit 9a, 9b Front and rear end load bar unit 10 Portal frame 13, 36 Friction drive means 14, 40 Friction drive wheel 15 Backup roller 16, 41 Motor 18 Main wheel 19 of load trolley 19 Vertical axis of load trolley Roller 20 Vertical axis 22a, 22b of load trolley Horizontal axis roller 23 of free trolley Vertical axis roller 24 of free trolley Vertical axis 27 of free trolley Vertical folding joint 28 Horizontal folding joint 29a, 29b Guide for steadying Roller 30 Hanger hanging brackets 32a and 32b Stabilizing guide rail 35 Horizontal curved path portions 37A and 37B Drive unit 38 Energizing means 43 Oscillating body 48 Fluid pressure cylinder unit

Claims (6)

  The transport traveling body includes a transport traveling body and a transported object support portion supported by the transport traveling body. The transport traveling body includes at least three trolleys arranged in series in the traveling direction, and is supported by these trolleys and horizontally bent. Provided with a load bar composed of a plurality of load bars connected via bent bending joints, and provided on the travel path side with friction drive wheels that are rotationally driven in pressure contact with the side surfaces of the load bar. The friction driving means is disposed, and the transport traveling body propelled by the friction driving means is configured to push and drive the immediately preceding transport traveling body via the load bar of each transport traveling body. In the friction drive transport device, a guide roller capable of rotating around a vertical axis is provided at the bent joint portion of the load bar or in the vicinity thereof, and the thrust drive section in the travel path includes the Load bar folding Part is from swinging laterally, the guide rails to prevent through the guide rollers are disposed, a friction drive conveyor apparatus.   2. The friction drive conveyance device according to claim 1, wherein the guide roller is rotatably supported around a rotation vertical axis of a bent joint.   3. The friction drive conveyance device according to claim 1, wherein the guide rollers are disposed in a pair of upper and lower sides so as to sandwich a load bar.   As the trolley, a pair of front and rear load trolleys for supporting the object support and a front and rear free trolley are provided. The load bar includes three intermediate load bars for connecting the four trolleys, and free front and rear ends. The load bar is composed of a single front and rear load bar projecting forward and backward from the trolley, and the bending joint portion of the load bar is configured to be bent around a vertical axis projecting from each of the four trolleys. Each of the front and rear ends of the load bar is fixed to the front and rear ends of the free trolley via the vertical shaft protruding from the front and rear ends of the free trolley. Item 4. The friction drive conveyance device according to Item 2 or 3.   5. The pair of left and right guide rails are arranged side by side so as to sandwich the guide roller from both the left and right sides of the straight path portion in the pushing drive section in the travel path. Friction drive conveying device.   The friction drive according to any one of claims 1 to 5, wherein the guide rail is disposed only on the outer side of the bend of the path portion in the horizontal curve path portion in the pushing drive section in the travel route. Conveying device.

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