JP5448570B2 - Transport device - Google Patents

Description

  The present invention relates to a conveyance device of a type in which a traveling body for conveyance that is movable along a conveyance path is hooked and pushed by a pusher on a drive chain side.

  As is known in overhead trolley conveyors and cart floor conveyors, this type of transport device is provided with a dog on a transport traveling body that is movable along a travel route, and moves along the travel route. The drive chain is provided with a pusher that engages with the dog and propels the transport traveling body, and separates the travel path of the drive chain from the travel path of the transport traveling body. Is removed from the dog on the transport traveling body side, so that the driving of the transport traveling body can be released to make it free. Accordingly, not only can the traveling body for transportation be stopped and stored without stopping the drive chain, but also it is possible to travel with different driving speeds and different intervals between the traveling bodies for transportation. In this type of transport device, a check dog located behind the pusher is also provided so that the transport traveling body does not advance further than the pusher due to gravity even on a downhill travel route. However, since the distance between the front driven dog and the back check dog is wider than the thickness of the pusher in the traveling path direction, There is play before and after the running direction.

  In addition, since patent document 1 describes the reduction gear of the structure which can be diverted to the braking device used for one structural requirement of the problem-solving means of this invention mentioned later, it has illustrated for reference. The configuration disclosed in Patent Document 1 is for decelerating and stopping a transporting traveling body (conveying trolley) that has been separated from a pusher on the drive chain side and freed to a predetermined position. It is clear that thought is completely different.

JP 7-69425 A

  In the transport apparatus as described above, when a work section is provided in the travel path of the transport traveling body for attaching parts to the object to be transported supported by the transport traveling body, for example, transport travel When a work section for bolting parts with an electric tool such as an impact driver is provided on the body of an automobile supported by the body, the transport traveling body that travels in the work section repeats the work on the object to be transported. Depending on the driving force, the driving resistance may or may not be received, or the driving force in the driving direction may or may not be received. As a result, the transport traveling body causes a pulsation phenomenon that repeats a preceding movement with respect to the pusher and a state of moving forward together with the pusher within a range of play between the pusher and the pusher on the drive chain side. As a result, the pulsation phenomenon of the transporting traveling body may damage the surface of the transported object with a tool, which may hinder the normal operation. In other words, with respect to the above-described problems that can be considered when this type of transport device is used for transporting an object to be transported in a work section, conventionally, no measures have been considered for solving this problem. It was.

The present invention proposes a transport apparatus capable of solving the above-described conventional problems, and the transport apparatus according to the present invention described in claim 1 is denoted by the reference numerals of the embodiments described later. If it attaches and shows, the dog 10 is provided in the traveling body 1 for conveyance which can move along a driving | running route, The drive chain 6 which moves along the said driving | running route engages with the said dog 10, and the said conveyance A transport device provided with a pusher 13 that propels the traveling body 1 and a check dog 11 that prevents the dog 10 from moving forward from the pusher 13, and is supported by the traveling body 1. In the horizontal work section WA set in the travel route for performing work on the transported object W, the pushers 13 are arranged so that the transport traveling bodies 1 travel at regular intervals. Transport equipment In the the conveying traveling body 1, the brake surface 12 is provided with a continuous over its entire length, wherein the working section WA, a plurality of braking device 9 in the travel path direction than the total length L of the braked surface 12 Each brake device 9 is disposed at a not-separated distance D, and each braking device 9 travels to the transport traveling body 1 by pressing the braking body 14a against the braked surface 12 against the braked surface 12. Biasing means 15a for providing resistance is provided , and the braking force applied to each transport traveling body 1 from each braking device 9 is set to a magnitude that allows the pusher 13 to drive the transport traveling body 1 forward. As long as the external force acting on each transporting traveling body 1 due to the work on the transported object W is not greater than the braking force, play of the pusher 13 between the dog 10 and the check dog 11 in the front-rear direction is prevented. within Feeding traveling body 1 has a configuration in which the pulsation in the front-rear direction of the conveying traveling body 1 accompanying the preceding moving forward is prevented against the pusher 13. Note that the configuration disclosed in Patent Document 1 is for decelerating and stopping a transport traveling body (transport trolley) separated from a drive chain side pusher to a predetermined position. It is clear that the technical idea of preventing pulsation is completely different.

  Note that, as described in claim 2, the transport traveling body 1 includes a load bar 3 suspended from a guide rail 5 by a plurality of trolleys 2a to 2d arranged at appropriate intervals in the traveling direction, and When the dog 10 is provided on the top trolley 2a of the trolleys 2a to 2d, the load bar 3 is provided. It is desirable that the left and right side surfaces are formed on the braked surface 12, and that each braking device 9 includes a pair of left and right braking bodies 14a and 14b that sandwich the load bar 3 from the left and right sides.

  The brake bodies 14a and 14b may be block bodies having a braking surface slidably in contact with the braked surface 12 on the transport traveling body 1 side as described in Patent Document 1. As described in FIG. 3, a braking body including a roller 18 supported on a fixed support shaft (vertical support shaft 17) via a bush 18d so as to be able to rotate is desirable.

  According to a fourth aspect of the present invention, each brake device 9 is pivotally supported by the support shaft (vertical support shaft 24) on the upper side in the travel path direction, and the free end side is urged. A movable arm 16 that is urged toward the braked surface 12 by means 15a, 15b and that is long in the traveling path direction can be provided, and the braking bodies 14a, 14b can be attached to the movable arm 16. In this case, as described in claim 5, the urging means 15 a, 15 b is constituted by a spring 27 that presses the movable arm 16 toward the braked surface 12, and the braked surface of the movable arm 16. A stopper 28 for determining the position of the swing limit toward the 12 side can be provided so that the swing limit position can be adjusted.

According to the configuration of the present invention as set forth in claim 1, the transport traveling body that is hooked by the pusher on the drive chain side and travels in the work section always has the braking body of at least one braking device pressed against the surface to be braked. Therefore, it receives a braking force (running resistance). In addition, the braking force that acts on each conveyance traveling body from each of these braking devices is set to a magnitude that allows the forward movement of the conveyance traveling body by the pusher, and acts on each conveyance traveling body by work on the object to be conveyed. As long as the external force is not greater than the braking force, the transport traveling body moves forward with respect to the pusher within the range of play in the front-rear direction of the pusher between the dog and the check dog. Since the pulsation in the front-rear direction of the transport traveling body is prevented, the transport travel body acts on the transport traveling body (conveyed object) by the work on the transported object transported within the work section. With an external force, it is possible to prevent the traveling body (conveyed object) from pulsating in the front-rear direction. As a result, problems caused by the pulsation, for example, the surface of the object to be transported (car body, etc.) is scratched by an electric tool handled by the worker, or the work efficiency is lowered by the pulsation. Therefore, it is possible to solve the problem that normal work is prevented from being performed.

  In addition, a transport bar is a load bar that is suspended from a guide rail by a plurality of trolleys arranged at appropriate intervals in the travel direction, and a hanger for supporting a transported object that is suspended below the load bar. When the dog is provided in the first trolley among the trolleys, according to the configuration according to claim 2, the load bar is used as it is and the left and right continuous over the entire length. Since a pair of braked surfaces can be formed, the embodiment is easy, and at the same time, the braking force is applied by a pair of left and right braking bodies that sandwich the load bar from both the left and right sides. Without tilting sideways, it is possible to reliably brake while maintaining an upright posture and prevent pulsation.

  Moreover, according to the structure of Claim 3, it does not wear the to-be-brake surface and braking body surface by the side of a conveyance traveling body, and it is not accompanied by generation | occurrence | production of a sliding contact sound or abrasion powder, and also required braking force is It can be reliably obtained by the rotational resistance of the roller by the bush.

  Further, according to the configuration of the fourth aspect, the structure is simpler than the case where the braking body is configured to be linearly movable in a direction perpendicular to the braking surface on the transport traveling body side. Regardless, the brake body can be configured to be smoothly movable in the perspective direction with respect to the braked surface on the transport traveling body side, and the urging force of the urging means is strongly applied to the brake body by utilizing the lever action. The biasing force of the biasing means itself to be used can be reduced. In particular, according to the fifth aspect of the present invention, the pressing force of the braking body against the braked surface, that is, the braking force against the transporting traveling body is adjusted by adjusting the swing limit position of the movable arm toward the braked surface side by the stopper. Can be easily and finely adjusted.

It is a schematic side view which shows the whole work area of a conveying apparatus. It is a side view which shows one traveling body for conveyance, and one braking device. Fig. A is a side view of the braking device, and Fig. B is a longitudinal side view showing details of the braking body. It is a partial cross section top view of a braking device. It is a vertical front view of the principal part of a conveying apparatus. It is a vertical rear view of the principal part of a conveying apparatus.

  In FIG. 1, reference numeral 1 denotes a conveyance traveling body, which is suspended by a load bar 3 suspended by four trolleys 2 a to 2 d and two load trolleys 2 b and 2 c located at the lower side of the load bar 3. The transported object supporting hanger 4 is constituted. Reference numeral 5 denotes a guide rail that forms a travel route of the transport traveling body 1, and the four trolleys 2a to 2d of the transport traveling body 1 are movably engaged with each other. Reference numeral 6 denotes a drive chain, which is suspended from a guide rail 7 constituting a circulation path so as to be movable through a trolley 8, and circulates and moves along the guide rail 7 by drive means (not shown). A guide rail 7 in the transport traveling body drive path portion in the circulation path is installed on the upper side of the guide rail 5 of the transport traveling body 1 in parallel with the guide rail 5.

  In the travel route of the transport traveling body 1, a linear work section WA is set in which parts are attached to a transported object (car body) W supported by the hanger 4. Within the section WA, a plurality of braking devices are provided at intervals D that are not longer than the total length L of the load bar 3 of the transport traveling body 1 (substantially the same as or slightly shorter than the total length L) in the travel path direction of the transport traveling body 1. 9 is attached.

  As shown in FIGS. 2, 5, and 6, the load bar 3 of the transport traveling body 1 is a central load bar unit 3 a that connects two front and rear load trolleys 2 b and 2 c that suspend the front and rear ends of the hanger 4. The front load bar unit 3b for connecting the front trolley 2a and the load trolley 2b, the rear side load bar unit 3c for connecting the rear end trolley 2d and the load trolley 2c, and the front trolley 2a fixed in the same direction as the front trolley 2a The front end load bar unit 3d slightly projecting forward from 2a and the rear end load bar unit 3e fixed in the same direction as the rear end trolley 2d and projecting slightly rearward from the rear end trolley 2d As is well known in the art, it is also carried on the horizontal curve path portion and the up and down gradient path portion in the travel route (guide rail 5) of the transport traveling body 1. Use the running body 1 is configured so as to be bent traveling accompanied by at joints between the joint portion and the trolley 2a~2d configured between each single 3a~3e of the load bar 3. Further, the leading trolley 2a is provided with a driven dog 10 which can be tilted only backward and downward on the front side, and a check dog 11 which can tilt only forward and downward on the rear side.

  The load bar 3 of the transport traveling body 1 has the same width over its entire length, and its left and right side surfaces extend over the entire length of the load bar 3 when the transport traveling body 1 travels within the linear work section WA. A braked surface 12 that is linearly continuous is formed. This braked surface 12 can also be used as a friction drive surface when propelling the transport traveling body 1 without depending on the drive chain 6. For example, the friction surface 12 is arranged in parallel so as to sandwich the load bar 3 from both the left and right sides. By using a friction driving device that includes a driving roller, a backup roller, and a motor that rotationally drives the friction driving roller, the transport traveling body 1 can be propelled by friction driving.

  A pusher 13 fitted between the driven dog 10 of the leading trolley 2a and the check dog 11 of the leading trolley 2a in the transport traveling body 1 protrudes downward from the drive chain 6 at appropriate intervals in the length direction. It is installed. The trolley 8 that supports and guides the drive chain 6 is attached to center links located on both the front and rear sides of the pusher 13. However, when the distance between the pushers 13 is long, the trolley 8 is also arranged at the position between the pushers 13. Is done.

  As shown in FIGS. 3 to 6, the braking device 9 includes a pair of left and right braking bodies 14 a disposed on the left and right sides of the moving path of the load bar 3 of the transport traveling body 1 that travels in the linear work section WA. 14b and urging means 15a and 15b for urging the pair of left and right braking bodies 14a and 14b toward the moving path side of the load bar 3, respectively. The pair of left and right braking bodies 14a and 14b are rollers fixed to intermediate positions of the movable arms 16 disposed on the left and right sides of the moving path of the load bar 3 and supported so as to rotate on a vertical support shaft 17 projecting downward. It is comprised from 18. The roller 18 has a synthetic resin annular body 18b such as urethane resin fitted around the roller body 18a, and a bush 18d is press-fitted and fixed to a boss portion 18c of the roller body 18. The bush 18d Is fitted to the vertical support shaft 17 upward from its lower end, and a nut 17c is screwed and fastened to the small-diameter screw shaft portion 17a at the lower end of the vertical support shaft 17 via a receiving plate 17b. Accordingly, the roller 18 supported on the receiving seat plate 17b fixed to the vertical support shaft 17 receives a rotational force that overcomes the frictional resistance between the bush 18d and the vertical support shaft 17, thereby causing the vertical support shaft 17 to move. Can rotate around.

  The guide rails 5 that support and guide the trolleys 2a to 2d of the transport traveling body 1 include a pair of left and right groove-shaped rails 5a and 5b that support and guide the wheels that are pivotally supported on the left and right sides of the trolleys 2a to 2d. Thus, a pair of front and rear mounting seats 19a and 19b are fixed to the outer vertical surfaces of the channel rails 5a and 5b at positions where the respective braking devices 9 of the guide rail 5 are disposed. Front and rear ends of the pair of left and right substrates 20 of the braking device 9 are attached to the seats 19a and 19b by bolts 21. A pair of front and rear horizontal projecting plates 22 and 23 are fixedly projected on the substrate 20, and an upper end portion of a vertical support shaft 24 is fixed to one horizontal projecting plate 22, and is movable on the vertical support shaft 24. One end of the arm 16, that is, the upper end of the transport traveling body 1 in the travel path direction is supported so as to be horizontally swingable, and the vertical plate 25 is fixed to the other horizontal overhanging plate 23 downward. It is installed.

  At the free end of the movable arm 16 (the end opposite to the side supported by the vertical support shaft 24), a vertical plate 26 facing substantially parallel to the vertical plate 25 on the substrate 20 side is fixed upward. The urging means 15a and 15b are constituted by a compression coil spring 27 and a stopper 28 which are provided so as to project between the vertical plates 25 and 26. The stopper 28 includes a bolt 28a that passes through between the vertical plates 25 and 26 at the center position of the compression coil spring 27, and a position adjustment nut 28b that is screwed into the bolt 28a outside the vertical plate 26 on the substrate 20 side. The swing limit position of the movable arm 16 that swings toward the moving path side of the load bar 3 is determined by receiving the pressing force of the compression coil spring 27 via the vertical plate 25. By adjusting the position of the adjustment nut 28b, the swing limit position of the movable arm 16 can be adjusted in the left-right inside and outside directions. Thus, when the load bar 3 of the transporting traveling body 1 does not enter between the pair of left and right rollers 18 of the braking device 9, as shown by the phantom line in FIG. The position of the position adjusting nut 28b of the stopper 28 is adjusted so as to enter the movement path of the bar 3.

  According to the above configuration, the pusher 13 of the drive chain 6 fitted between the driven dog 10 and the check dog 11 of the leading trolley 2a hooks and moves the driven dog 10, thereby moving the traveling body for conveyance. 1 is allowed to travel along the travel route (guide rail 5). While the transport traveling body 1 travels within the linear work section WA shown in FIG. At least one braking device 9 always acts on one load bar 3.

  Specifically, between the rollers 18 as the pair of left and right braking bodies 14a and 14b in the braking device 9, the rollers 18 are pushed outward against the urging force of the compression coil spring 27 of the urging means 15a and 15b. While the load bar 3 enters and the load bar 3 escapes from between the rollers 18, the roller 18 is pressed against the braked surface 12 that is the left and right side surfaces of the load bar 3 by the urging force of the compression coil spring 27. However, the frictional resistance between the braked surface 12 rotates against the frictional resistance between the bush 18 d and the vertical support shaft 24. At this time, the rotation resistance of the rollers 18 (friction resistance between the bush 18d and the vertical support shaft 24) acts as a running resistance on the load bar 3 side, so that the pusher 13 on the drive chain 6 side performs this braking. The transport traveling body 1 is driven forward against the traveling resistance applied from the two rollers 18 in the device 9, and the driving chain is not subjected to an external force larger than the traveling resistance applied from the braking device 9 in the forward direction. In the range of play between the pusher 13 and the check dog 11, the transport traveling body 1 driven forward by the six-side pusher 13 moves the driven dog 10 away from the pusher 13 forward. There is no fear of moving ahead. In other words, the external force that acts on the transport traveling body 1 by the work performed on the transported object W supported by the hanger 4 of the transport traveling body 1 traveling in the work section WA is described above. Thus, there is no possibility that the transport traveling body 1 pulsates back and forth, and the problem caused by the forward and backward pulsations of the transport traveling body 1 is solved.

  Even if the transport traveling body 1 travels and the load bar 3 escapes forward from between the two rollers 18 of one braking device 9, the transport travel body 1 of the transport traveling body 1 is almost simultaneously or before that time. Since the load bar 3 enters between the two rollers 18 of the next braking device 9 and receives the traveling resistance in the same manner, the pulsation prevention described above is carried out until the traveling body 1 for transportation exits the work section WA. The effect will continue to be received. Further, the pressing force of the rollers 18 against the load bar 3 in each braking device 9 causes the swing limit position of the movable arm 16 to enter deeply into the movement path of the load bar 3 by adjusting the position adjustment nut 28 b of the stopper 28. Therefore, the position adjustment nut 28b of the stopper 28 may be adjusted so that the optimum braking force can be obtained.

  In addition, when the distance D between the front and rear braking devices 9 is shorter than the total length L of the load bar 3, a time zone in which the two front and rear braking devices 9 act simultaneously on the load bar 3 of one transport traveling body 1 is generated. There is no problem at all because the running resistance applied to the transport traveling body 1 is only doubled and the thrust applied from the pusher 13 of the drive chain 6 is sufficiently large. Accordingly, for example, the presence of the yoke material 29 that integrally connects the guide rail 5 on the transport traveling body 1 side and the guide rail 7 on the drive chain 6 side, the braking device is arranged at equal intervals, for example, approximately equal to the entire length L of the load bar 3. Even if each of the braking devices 9 is not disposed longer than the total length L of the load bar 3, the desired braking device 9 can be provided. The purpose of can be achieved.

  The present invention can also be applied to a cart-type floor conveyor in which a cart supported on a guide rail laid along a traveling path is propelled by a pusher pusher that moves below the cart. . In this case, the side surface of the carriage can be used as a braked surface, or a rod-shaped member that forms a continuous braked surface over the entire length can be attached to the bottom of the carriage. Moreover, when implementing this invention, as a braking body, it is not limited to the roller type thing shown to the said Example, It can also comprise with the block material which does not rotate. Furthermore, it is also possible to use a fluid pressure cylinder that applies an urging force by air pressure or hydraulic pressure as the urging means.

  The transport apparatus of the present invention can be used as an overhead conveyor of a chain conveyor type for suspending and transporting a vehicle body in an automobile assembly line, particularly as an overhead conveyor configured to be able to separate a transport traveling body from a drive chain side.

DESCRIPTION OF SYMBOLS 1 Transfer traveling body 2a-2d, 8 Trolley 3 Load bar 4 Hanger 5 Guide rail of driving | running | working traveling body 6 Drive chain 7 Guide rail of drive chain 9 Braking device 10 Driven dog 11 Non-return dog 12 Braking surface 13 Pusher 14a, 14b Brake body 15a, 15b Biasing means 16 Movable arm 17, 24 Vertical support shaft 18 Roller 18a Roller body 18b Synthetic resin annular body 18c Boss portion 18d Bush 20 Substrate 22, 23 Horizontal extension plate 25, 26 Vertical Plate 27 Compression coil spring 28 Stopper 28a Bolt 28b Position adjusting nut L Total length of load bar D Spacing between braking devices W Conveyed object WA Linear work section

Claims (5)

A dog is provided on the transport traveling body that is movable along the travel path, and a pusher that is engaged with the dog and propels the transport traveling body is provided on the drive chain that moves along the travel path. A transport device provided with a check dog that prevents the dog from moving forward from the pusher, the travel path for performing work on a transported object supported by a transport traveling body In the horizontal work section set inside, in the transfer apparatus in which the pushers are arranged so that each transfer traveling body travels at regular intervals, the transfer traveling body is continuously covered over its entire length. braking surface is provided on the working section, a plurality of braking devices are arranged at intervals the not longer than the total length of the braking surface in the travel path direction, each braking device, abuts against the braked surface braking And body, biasing means are provided to impart a running resistance of the braking body the the conveying traveling body is pressed against the braked surface, the braking force acting on each conveying traveling body from the respective braking device, the The dog and the check dog are set to a size that allows the forward drive of the transport traveling body by the pusher and the external force acting on each transport traveling body by the work on the transported object is not greater than the braking force. In the range of play in the front-rear direction of the pusher between, the front-rear direction pulsation of the transporter-traveling body due to the forward movement of the transporter-runner forward with respect to the pusher is prevented .   The transport traveling body includes a load bar suspended from a guide rail by a plurality of trolleys arranged at appropriate intervals in the traveling direction, and a hanger for supporting an object to be transported suspended below the load bar. And the dog is provided in the leading trolley of the trolley, the left and right side surfaces of the load bar are formed on the braked surface, and each braking device clamps the load bar from both the left and right sides. The transport apparatus according to claim 1, comprising a pair of left and right braking bodies.   The conveying device according to claim 1 or 2, wherein the braking body of each braking device is constituted by a roller supported on a fixed support shaft so as to be able to rotate via a bush.   In each of the braking devices, the upper side in the travel path direction is pivotally supported by a support shaft, and the free end side is urged toward the braked surface side by the urging means, and is long in the travel path direction. The transport apparatus according to any one of claims 1 to 3, further comprising a movable arm, wherein the brake body is attached to the movable arm.   The biasing means includes a spring that presses the movable arm toward the braked surface, and a stopper that determines a swing limit position of the movable arm toward the braked surface can be adjusted freely. The conveyance apparatus of Claim 4 provided.

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