JP2008222406A - Conveying equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide conveying equipment easy to make a work support hanger ride over a crossing route, and possible to be used for an automobile assembly line. <P>SOLUTION: A work support hanger 13 is provided in a conveying travelling body 11 freely to be elevated through an elevation support means 12 comprising an operation lever for elevating the hanger 13 with vertical swing, and a cam rail 44A is provided to be engaged with a cam follower roller pivotally supported by the operation lever. In this conveying equipment, a section wherein the hanger 13 is made to travel at a low level and a crossing route ride-over section wherein the hanger 13 is made to travel at a high level are provided, and a level switching device 46 for hanger 13 is provided between both the sections. The level switching device 46 is provided with an elevation cam rail 48, with which the cam follower roller is to be engaged, and an elevation driving means (a rotary screw shaft 49) for elevating the elevation cam rail 48 between a position for connecting the elevation cam rail 48 to an upper cam rail 44A and a position for connecting to a lower cam rail. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transport facility that can raise and lower an object to be transported and can be used in a production line of an automobile.

Conveying equipment that can change the movement level of an object to be conveyed along a certain route up and down in a predetermined section, in other words, an conveying facility that can raise and lower an object support at a predetermined position in the conveying path. Various types are known. For example, the transport facility described in Patent Document 1 suspends a transported object support tool via a lift support means using a link mechanism on a transport traveling body that travels on a fixed travel route, and links the lift support means. The mechanism is driven by a motor-driven screw shaft so that the object support is moved up and down.
JP 2007-8621 A

  In the conventional transport facility described in Patent Document 1 as described above, a drive unit (such as a motor or a screw shaft) for driving the lifting support unit is mounted on each transport traveling body. In combination with the need for power supply equipment for each transport traveling body along the transport line, a transport facility in which a large number of transport traveling bodies are provided in one transport path, such as an automobile production line, Overall equipment costs are very high. In particular, in the case where the above-described transport facility is used in an assembly line in which parts are manually assembled to an automobile body supported by a transported object support, the transported object support is only passed through a crossing path crossing the assembly line. Is only raised to a level higher than that of the crossing path, and there are few opportunities to raise and lower the transported object support tool, so the cost effectiveness is low.

  An object of the present invention is to provide a transport facility that can solve the above-described conventional problems, and the transport facility according to claim 1 is provided with reference numerals of embodiments to be described later. In this case, a transport object 11 (work support hanger 13) is provided on the transport traveling body 11 traveling along a fixed travel path so as to be movable up and down via the lift support means 12, and the lift support means 12 includes An operation lever 42 is provided for raising and lowering the object support (work support hanger 13) by swinging up and down, and the cam rails 44A and 44B engaged with the cam driven roller 43 pivotally supported by the operation lever 42 are provided as described above. A transport facility provided along a travel route, in which the transported object support (work support hanger 13) travels at a low level in the travel route and at a high level. A section (crossing passage crossing passage section) to be performed is provided, and level switching devices 46 and 47 of the object support (work support hanger 13) are provided between both sections, and the level switching device 46, 47, an elevating cam rail 48 in which the cam follower roller 43 can enter and retract in the horizontal direction, and a position where the elevating cam rail 48 is connected to the upper cam rail 44A or 44B and a position where the cam driven roller 43 is connected to the lower cam rail 44B or 44A. The lift driving means (49 to 51) for lifting and lowering is provided.

  In carrying out the present invention having the above-described configuration, specifically, as described in claim 2, the section in which the object support (work support hanger 13) travels at a low level includes the object support. A section in which the workpiece support (work support hanger 13) travels at a high level intersects with a crossing path 45 that crosses the transport path, as a work line for the workpiece supported by the (work support hanger 13). The travel route of the transport traveling body 11 can be provided at a level higher than that of the crossing route 45.

  According to a third aspect of the present invention, the transport traveling body 11 travels with the lower guide rail 27 and the upper guide rail 28 via trolleys 18b, 18c, 21a, and 21b provided on both upper and lower sides thereof. The upper and lower guide rails 27 and 28, the cam rails 44A and 44B, and the level switching devices 46 and 47 are supported by the gantry 1 installed on the floor surface 3, and the lateral side of the gantry 1 is supported. On the other hand, the object support tool (work support hanger 13) can be configured to move up and down in a cantilevered manner.

  According to a fourth aspect of the present invention, the elevating support means 12 includes a movable body 33 that can be moved back and forth in parallel with the traveling direction of the transport traveling body 11, and the movable body 33. A swing link 35a that is pivotally supported in a vertically swingable manner along a vertical plane parallel to the moving direction and that suspends the object support (work support hanger 13) at the free end, and this swing A short link (third swing link 39) interposed between the intermediate position of the link 35a and the transport traveling body 11 is provided, and by this short link (third swing link 39), The transport object support tool (work support hanger 13) is configured to vertically move with the vertical swing of the swing link 35a and the back and forth movement of the movable body 33, and the operation lever. 42 is the short link (third swing link 3 ) And it can be interlocked. In this case, as described in claim 5, when the transport traveling body 11 is in a section where the object support tool (work support hanger 13) travels at a low level, the swing link 35 a is transported. The operation lever 42 can be configured to extend obliquely rearward and downward with respect to the traveling direction of the body 11 and to extend obliquely rearward and upward.

  According to the transport facility of the present invention as set forth in claim 1, the object support device to be transported by the cam rails erected on the travel path side via the cam driven roller of the operation lever in the lifting support means on the transport body side. Therefore, even in a transport facility in which a large number of transport traveling bodies are provided in a single transport path as in an automobile production line, each transport travel body is provided on the transport path side. Coupled with the fact that no power supply equipment is required, the equipment cost of the entire transport equipment can be greatly reduced. In addition, since the level of movement of the transport object support of each transport traveling body can be centrally regulated by the level of the cam rail without requiring special control, the control system of the transport object support tool can be controlled by a malfunction or malfunction of the control system. The intended transport operation can be performed safely and reliably without the movement level fluctuating unexpectedly.

  Furthermore, when it is necessary to greatly change the movement level of the object support tool, for example, there is a crossing path in the assembly work line for moving the object support tool at a low level close to the floor surface. In the place where the vehicle crosses the crossing road and passes through the crossing road, the transporter support tool is rapidly raised to the crossing road crossing level by the level switching device on the upper side, and the transporting object supporter is put on the crossing road in such a state. Then, the object support tool is rapidly lowered to the original work level (low level) by the lower level switching device, and the object support tool is moved again at the original work level (low level). Inclined cam rails that are inclined at an angle that allows the cam driven roller (operating lever) to be pushed up and down smoothly and comfortably as the conveyance traveling body travels. As compared with the case to perform the level conversion of more conveyed object support, it is possible to reduce the degree of effective path length is shortened work line by a transverse passage overcame passage section. Further, the traveling resistance of the transport traveling body is not significantly increased by switching the level of the transported object support, which is advantageous for the configuration of the travel drive means of the transport traveling body.

  In addition, according to the structure of Claim 2, the conveyance equipment of a layout which has a crossing path in the middle of the assembly work line which moves a to-be-conveyed object support tool at the low level near a floor surface is implemented easily. Can do.

  According to the third aspect of the present invention, since the width of the space required for the travel route of the transport traveling body is reduced, the lateral width of the gantry supporting the guide rail and the cam rail of the transport traveling body is reduced. The floor space occupied can be reduced. And when using this invention apparatus as a work line which works with respect to the to-be-conveyed object which the said to-be-conveyed object support tool supports when a to-be-conveyed object support tool exists in a descent | fall limit level, It is possible to ensure a favorable work environment in which the above-mentioned pedestal is only present on one side of the work line.

  Furthermore, according to the structure of Claim 4, although the to-be-conveyed object support tool can be vertically moved with respect to the conveyance traveling body, the full length area of the raising / lowering path | route of a to-be-conveyed object support tool Since there is no guide means such as an elevating guide rail that is fixed over the entire area, it is possible to pass over the intended crossing only by constructing it so that the object support itself can be raised to the crossing level. Can be realized. Particularly in this case, according to the configuration of the fifth aspect, the traveling resistance of the transport traveling body can be reduced and the traveling can be smoothly performed.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. A support column 4 installed on the surface 3 and standing upright on both the left and right sides of the passage 2, an intermediate floor portion 5 supported by the support columns 4, and a maintenance work passage 6 in the center upper portion of the width of the intermediate floor portion 5 are secured. As shown, the upper support column 7 is erected in two right and left rows on the intermediate floor portion 5, and the ceiling portion 8 is supported by the upper support column 7 and has the same width as the intermediate floor portion 5. The intermediate floor portion 5 may be a floor material (including a steel net or a punching metal plate) stretched over the entire area, or at least in a region that becomes the floor surface of the maintenance work passage 6. Only the flooring may be stretched. Moreover, although the ceiling part 8 can be comprised from a horizontal framework structure, the ceiling material may be stretched in the whole area or a part as needed.

  Reference numeral 9 denotes a suspended conveyance facility, which is an endless circulation conveyance path having an outward conveyance path section 10a and a backward conveyance path section 10b arranged in parallel so as to sandwich the linear path 2 on the lower side of the support base 1. A plurality of transporting traveling bodies 11 that travel by friction drive along a workpiece, and a work support hanger 13 that is supported in a cantilever manner on the outer side of each transporting traveling body 11 via lifting support means 12. Yes.

  Referring to FIG. 5 to FIG. 8 in detail, the structure of the suspended transport equipment 9 is such that each transport traveling body 11 is composed of five load bars 14a to 14e having the same width horizontally by vertical support shafts 15a to 15d. A load bar unit 16 that is foldably connected to the front and rear, and a front and rear attached to the load bar unit 16 so as to be rotatable around two vertical support shafts 15b and 15c in the middle of the lower side of the load bar unit 16 A pair of load trolleys 17a and 17b, and a pair of front and rear guide trolleys 18a and 18b attached to the load bar unit 16 so as to be rotatable around the vertical support shafts 15a and 15d at both front and rear ends below the load bar unit 16. , Supported by the upper side of the load bar unit 16 in parallel with the load bar 14c via the two vertical support shafts 15b and 15c in the middle, the side view is rectangular A frame-shaped main body 19 and a pair of front and rear upper sides supported on the upper side of the main body 19 so as to be rotatable around the two front and rear vertical support shafts 20a and 20b concentric with the two front and rear vertical support shafts 15b and 15c. It is composed of road trolleys 21a and 21b. A pair of front and rear and two sets of upper and lower load trolleys 17 a, 17 b, 21 a, and 21 b each have a pair of front and rear guide rollers 22 of the same diameter supported by a vertical shaft, and a horizontal axis at an intermediate position between the pair of front and rear guide rollers 22. And a large-diameter support roller 23 supported by the shaft. The pair of front and rear guide trolleys 18 a and 18 b are respectively supported by a vertical shaft and a pair of front and rear guide rollers 24 having the same diameter as the guide roller 22 of the load trolley, and an intermediate position between the pair of front and rear guide rollers 24. And a small-diameter support roller 25 supported by a horizontal shaft.

  It should be noted that the load bars 14a, 14e located at the front and rear ends of the load bar unit 16 are shorter than the other and are always parallel to the guide trolleys 18a, 18b at the front and rear ends. It is being fixed to the said guide trolleys 18a and 18b via 15d.

  The transporting traveling body 11 having the above configuration can travel in the traveling space 26 between the intermediate floor portion 5 and the ceiling portion 8 of the support base 1 and outside the upper support column 7 (outside the maintenance work passage 6). Is arranged. That is, on the upper side of the intermediate floor portion 5 corresponding to the floor of the traveling space 26, the guide rollers 22 in the trolleys 17 a to 18 b of the load bar unit 16 are loosely fitted so as to be able to roll. An upper open lower groove-shaped guide rail 27 composed of two provided mold members is laid, and a load bar unit is placed on the inner flat rail surface 27a (the upper surface of the intermediate floor portion 5) of the lower groove-shaped guide rail 27. The support rollers 23 and 25 in each of the 16 trolleys 17a to 18b are configured to roll. Further, below the ceiling portion 8 corresponding to the ceiling of the traveling space 26, an upper load trolley of the main body 19 is provided. 21a, 21b guide roller 22 is loosely fitted so that it can roll, and a lower open upper grooved guide rail 28 composed of two molds arranged in parallel below the ceiling portion 8 is laid. Is, the upper load trolleys 21a beneath the inner flat rail surface 28a of the upper groove-shaped guide rail 28 (the lower surface of the ceiling portion 8), the support rollers 23 at 21b are configured to roll movement. With this configuration, the transport traveling body 11 can travel in parallel with the forward transport path portion 10 a and the transport path portion 10 b while maintaining a vertical posture in the travel space 26. When the transport traveling body 11 travels along the linear forward transport path portion 10a and the transport path portion 10b, the load bar unit 16 extends linearly, and both left and right side surfaces of the load bars 14a to 14d. Form one continuous vertical plane.

  The driving method of each transporting traveling body 11 is not particularly limited. For example, as shown by phantom lines in FIGS. A motor-driven friction drive roller 29 and a backup roller 30 sandwiching the load bar unit 16 from both the left and right sides with the left and right side surfaces of the load bar unit 16 extending linearly when the traveling body 11 travels as a driven friction surface; It is possible to use a friction drive unit 31 composed of a combination of the above. Such a friction drive method is well known in the art and will not be described in detail. In this embodiment, the front end of the load bar unit 16 of each transport traveling body 11 (the front end of the load bar 14a at the front end) is transported immediately before. The plurality of transport traveling bodies 11 are transported to the forward transport path section 10a and transported by a so-called thrusting method in which the rear end of the load bar unit 16 of the travel body 11 (the rear end of the load bar 14e at the rear end) is pushed. In the assembly line set in the path portion 10b, it can be driven at a constant speed in a daisy chain.

  As shown in FIGS. 5 to 7, the lifting support means 12 is provided on the main body 19 of the transport traveling body 11 via a pair of left and right guide rails 32 laid on the lower horizontal frame member 19 a of the main body 19. A movable body 33 supported so as to be movable back and forth in parallel with the length direction of the main body support load bar 14c of the load bar unit 16 and a parallel link mechanism 34 for connecting the movable body 33 and the work support hanger 13 to each other. It is configured. The parallel link mechanism 34 has one end of each of the first swing link 35a and the second swing link 35b, and the second swing link 35b is in the travel direction of the transport traveling body 11 with respect to the first swing link 35a. With the arrangement located in the front, the movable body 33 is pivotally supported by horizontal support shafts 36a and 36b which are laterally oriented horizontally, and the other ends of the links 35a and 35b are laterally oriented with both links 35a and 35b being parallel to each other. Short links that are pivotally supported on the hanger arm support frame 13a of the work support hanger 13 by the horizontal support shafts 37a and 37b, and are supported at one end by the horizontal support shaft 38 that is laterally directed horizontally at the middle position of the first swing link 35a. That is, the other end of the short third oscillating link 39 is pivotally supported on the rear end portion of the main body 19 by the horizontal support shaft 40 that is laterally directed laterally, so that the horizontal support shafts 36a, 38, 0 is positioned at each vertex of an isosceles triangle with the base between the horizontal support shafts 36a and 40, and therefore the work support hanger 13 is vertically parallel with the lateral movement of the movable body 33. It is configured to move up and down. At this time, the positions of the links 35a, 35b, 39 of the parallel link mechanism 34 in the horizontal direction are set to the main body 19 (movable body) in the order of the third swing link 39, the first swing link 35a, and the second swing link 35b. 33) apart from the laterally outer side, the links 35a, 35b, 39 interfere with each other between the downward posture shown in FIGS. 5 and 6 and the upward posture shown in FIGS. It is configured so that it can be swung vertically.

  In the lifting support means 12 having the above-described configuration, the links 35 a, 35 b, 39 of the parallel link mechanism 34 hang down substantially vertically downward from the main body 19 side due to gravity acting on the work support hanger 13 side. The hanger height regulating means 41 is provided in order to regulate the height of the work support hanger 13 from the floor surface 3. As shown in FIGS. 5 to 7, the hanger height regulating means 41 in this embodiment is interlocked with the third swing link 39 in the parallel link mechanism 34 via the horizontal support shaft 40 and is connected to the horizontal support shaft 40. An operation lever 42 extending in the opposite direction, a cam driven roller 43 pivotally supported on the free end of the operation lever 42, and a travel path of the transport traveling body 11 so as to act in a direction to push down the cam driven roller 43 44A and a cam rail 44B described later. The operation lever 42 is disposed on the opposite side (inside) to the side (outside) where the parallel link mechanism 34 is provided with respect to the transporting traveling body 11, and the cam rails 44 </ b> A and 44 </ b> B are arranged on the intermediate floor 5 of the support base 1. And the ceiling portion 8 and outside the upper support column 7.

  Thus, as shown in FIG. 1, the transporting path portion 10a, FIG. 5 and FIG. 6, the operation lever 42 when the cam rail 44A is at a high level, that is, when the cam driven roller 43 is in contact with the lower side of the cam rail 44A. In a section where the workpiece support hanger 13 is horizontally disposed at a height that is substantially upward, the movement level of the work support hanger 13 is regulated to a work level approaching the floor 3. Then, as shown in FIG. 1, the reverse conveyance path portion 10b, FIG. 9, and FIG. 10, the cam rail 44B is at a low level, that is, the operation lever 42 is substantially downward when the cam follower roller 43 contacts the lower side of the cam rail 44B. In the section that is horizontally disposed at the height, the movement level of the work support hanger 13 can be restricted to a level above the intermediate floor portion 5 of the support gantry 1, that is, above the passage 2. .

  That is, as shown in FIG. 4, a crossing path 45 is laid out so as to cross the forward conveyance path portion 10 a and the reverse conveyance path portion 10 b of the hanging conveyance facility 9 and connect to the lower path 2 of the support frame 1. When the workpiece support hanger 13 passes through the crossing path 45, the movement level of the workpiece support hanger 13 is set to the return conveyance path portion 10b in FIG. 1, the overriding level shown in FIG. 9, and FIG. Switch. In this embodiment, as shown in FIG. 2, the cam rail 44A (see FIGS. 5 and 6) installed horizontally at a high level on the upper side of the section is located below the entrance of the section including the crossing path 45. A level switching device 46 for moving the cam driven roller 43 in pressure contact to the lower side of a cam rail 44B (see FIGS. 9 and 10) horizontally installed at a low level in a section including the crossing path 45 is provided. As shown in FIG. 3, the cam follower roller 43 that presses the lower side of the cam rail 44B horizontally installed at a low level in the section includes a cam driven roller 43 at the lower side of the section. A level switching device 47 for shifting to the lower side of the cam rail 44A installed horizontally at the level is also provided.

  The level switching devices 46 and 47 have the same structure incorporated in the hanger height restricting means 41, and as shown in FIG. 11, the ascending limit position connected to the cam rail 44A installed at a high level, An elevating cam rail 48 that is driven up and down between the lower limit position connected to the cam rail 44B installed at a low level is provided. The elevating cam rail 48 is supported by the guide rail 48a so as to be movable up and down, and is a female screw body that is screwed into a rotating screw shaft 49 that is vertically supported on the rear side of the elevating path of the elevating cam rail 48 so that it can only rotate. 50 is projected, and the rotary cam shaft 49 is configured to be moved up and down by the motor 51 being driven to rotate forward and backward.

  The use method and operation of the transport equipment configured as described above will be described. The work loading place set in the transport path of the suspended transport equipment 9, for example, the floor at the start position of the forward transport path portion 10a in FIG. The workpiece W such as an automobile body carried in by the conveyor 52 is transferred to the workpiece support hanger 13 of the transport traveling body 11 stopped at the workpiece loading position. The transfer of the workpiece W at this time can be performed by using the opening / closing motion of the hanger arm 13b of the workpiece support hanger 13 shown by a virtual line in FIG. The conveyance traveling body 11 in which the workpiece W is loaded on the workpiece supporting hanger 13 is caused to travel at a constant speed by the friction drive unit 31 as described above, and the workpiece supporting hanger 13 is moved to the floor surface by the hanger height regulating means 41. While moving at a work level close to 3, assembly work such as assembly of parts to the workpiece W can be performed. At this time, the first rocking link 35a and the second rocking link 35b of the parallel link mechanism 34 extend obliquely rearward and downward from the traveling body 11 for conveyance with respect to the traveling direction.

  When it is better to raise the workpiece W from the floor 3 because the work target location of the workpiece W is low, the cam rail 44A of the hanger height regulating means 41 in the working section is lowered horizontally and installed horizontally. It ’s fine. When sections with different installation levels of the cam rail 44A are provided in this way, the cam rail 44A is inclined at a required angle between the section and the sections before and after the section, and the cam driven roller is accompanied with the travel of the transport traveling body 11. What is necessary is just to comprise so that 43 (control lever 42) may move up and down smoothly. Of course, a level switching device similar to the level switching devices 46 and 47 described above can be used.

  As shown in FIG. 2, the level switching device 46 disposed on the upper side of the crossing path 45 stands by at the ascending limit position where the elevating cam rail 48 is connected to the upper cam rail 44A. When the cam driven roller 43 on the transport traveling body 11 side moves to a predetermined position near the front end in the lift cam rail 48, the transport traveling body 11 is temporarily stopped and the lift cam rail 48 is lowered to the lower limit position. As a result, the operation lever 42 is forcibly swung from the oblique rear upward posture to the diagonal rear downward posture via the cam driven roller 43, and the third swing of the parallel link mechanism 34 is accompanied by the swing of the operation lever 42. The dynamic link 39 rotates around the horizontal support shaft 40 from the diagonally forward downward posture to the diagonally forward upward posture, and the first rocking link 35a and the second rocking link 35b of the parallel link mechanism 34 from the diagonally backward downward posture. It rotates around the horizontal support shafts 36a and 36b to an obliquely rearward upward posture. At this time, since the cam follower roller 43 reciprocates back and forth within the elevating cam rail 48, the elevating cam rail 48 has a length that allows the cam follower roller 43 to reciprocate back and forth.

  As the work support hanger 13 rises from the work level to the ride-over level while maintaining the horizontal posture as the first swing link 35a and the second swing link 35b of the parallel link mechanism 34 move upward in parallel, By starting the transport traveling body 11 in this state, the cam driven roller 43 is shifted from the inside of the elevating cam rail 48 to the lower side of the cam rail 44B installed at a low level in the section including the crossing path 45, and is raised to the overcoming level. The workpiece support hanger 13 can be moved through the upper side of the crossing path 45. The work supporting hanger 13 that has passed the crossing path 45 is temporarily stopped at the position of the level switching device 47 on the lower side of the crossing path 45, and can be lowered again to the original work level by the level switching apparatus 47. it can. At this time, the elevating cam rail 48 of the level switching device 47 receives the cam driven roller 43 from the lower side of the cam rail 44B while waiting at the lower limit position, and then is installed at the lower level on the cam rail 44A. It is raised to the ascending limit position connected to. As a result, the work support hanger 13 is lowered from the level of overriding to the original work level, so that the transporting traveling body 11 can be started and assembly work on the work W can be continued.

  Work on the workpiece W supported by the workpiece support hanger 13 is completed, and the workpiece is supported at the workpiece lowering position set in the conveyance path of the hanging conveyance facility 9, for example, at the terminal position of the backward conveyance path portion 10b in FIG. If the work hanger 13 arrives, the transport traveling body 11 can be stopped at the work lowering position, and the work W can be transferred onto the floor conveyor 53 and carried out. The transfer of the workpiece W at this time can also be performed by using the opening / closing motion of the hanger arm 13b of the workpiece support hanger 13 shown by a virtual line in FIG.

  An example of the travel driving operation of the actual transport traveling body 11 will be described. The transport traveling body 11 is driven and pushed in a daisy chain by a friction drive unit 31 disposed at the start position of the assembly work line. The high-speed driving friction drive unit 31 speeds up the transport traveling body 11 at the beginning of the row of the above-mentioned row so as to be separated from the succeeding transport traveling body 11 a certain distance before the level switching device 46 on the entrance side of the crossing path 45. Driven, the transport traveling body 11 is traveled to the position of the level switching device 46 by appropriate propulsion means and stopped. The level switching device 46 switches over the workpiece support hanger 13 to the level. Thereafter, the transport traveling body 11 is started from the level switching device 46 by appropriate propulsion means, and the transport traveling body 11 is driven at a high speed by the friction drive unit 31 for high-speed driving to pass through the crossing path 45. Then, the transporting traveling body 11 that has passed through the crossing path 45 travels to the position of the level switching device 47 with appropriate propulsion means and stops it. The level switching device 47 returns the work support hanger 13 to the working level, and then The transport traveling body 11 is started from the level switching device 47 by appropriate propulsion means, and the transport traveling body 11 is driven at a high speed by the friction drive unit 31 for high speed driving and sent to the lower assembly line. The friction drive unit 31 disposed at the start position of the assembly work line can be switched again to the pushing drive in the daisy chain state.

  In addition, utilization of this invention apparatus is not limited to the example shown by the said embodiment. Further, when implementing the device of the present invention, basically, the second swing link 35b may be omitted. In this case, the hanger 13 for supporting the object to be conveyed can swing back and forth with respect to the first swing link 35a, but without using the second swing link 35b, for example, a method as described in Patent Document 1 Thus, the posture of the hanger 13 for supporting the object to be conveyed may be regulated. The cam follower roller 43 is concentric with the support shaft 38 that supports the first swing link 35 a and the third swing link 39 or at a position close to the support shaft 38. It is also possible to pivotally support the first swing link 35a. Further, when the operation lever 42 is provided, the operation lever 42 extends in the same direction as the third swing lever 39 with respect to the support shaft 40, and the operation lever 42 and the third swing lever 39 are in the same direction. You may comprise so that it may rock | fluctuate up and down. Furthermore, the hanger 1 can be caused to travel in a direction in which the first swing link 35 a extends obliquely forward and downward in the traveling direction of the hanger 1.

It is a vertical front view which shows the state (right half) in which the work support hanger is in a work level, and the state (left half) in which the work support hanger is in a climbing level. It is a partially notched side view which shows a crossing path and the conveyance path | route part of the upper side. It is a partially cutaway side view which shows a crossing path and the conveyance path | route part of the lower side. It is a schematic plan view which shows an example of the layout of the whole installation. It is an expanded side view of the principal part in the state which has the work support hanger in a work level. It is a front view of the principal part of FIG. It is a top view of the principal part of FIG. It is a cross-sectional top view which shows the load bar of the traveling body for conveyance. It is an enlarged side view of the principal part in the state which has the hanger for workpiece | work support in a climbing level. It is a front view of the principal part of FIG. FIG. 1A is a longitudinal front view showing a level switching device for a work support hanger, and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supporting pedestal 2 Passage | path 5 Intermediate | middle floor part 6 Maintenance work path | pass 8 Ceiling part 9 Hanging conveyance equipment 10a Outward conveyance path | route part 10b Reverse conveyance path | route part 11 Conveyance traveling body 12 Lifting support means 13 Work support hanger 14a -14e Load bar 16 Load bar unit 17a, 17b, 21a, 21b Load trolley 18a, 18b Guide trolley 19 Main body 27 Lower groove guide rail 28 Upper groove guide rail 29 Friction drive roller 31 Friction drive unit 33 Movable body 34 Parallel link Mechanism 35a First swing link 35b Second swing link 39 Third swing link 41 Hanger height regulating means 42 Operation lever 43 Cam driven roller 44A High level cam rail 44B Low level cam rail 45 Crossing path 46, 47 Level switching Device 48 Elevating cam rail 49 Rotating screw shaft 52, 53 Floor conveyor

Claims (5)

  A carrier support is provided on a transport traveling body that travels along a fixed travel path so as to be movable up and down via a lift support means, and the lift support means has an operating lever for raising and lowering the transport support by swinging up and down. And a cam rail that engages with a cam driven roller that is pivotally supported by the operation lever, is provided along the travel path. A section that travels at a level and a section that travels at a high level are provided, and a level switching device for a transported object support is provided between the two sections. The level switching device is configured such that the cam driven roller is in a horizontal direction. An elevating cam rail capable of entering and leaving, and elevating drive means for elevating between the position where the elevating cam rail is connected to the upper cam rail and the position where the elevating cam rail is connected to the lower cam rail are provided. .   The section in which the object support tool travels at a low level is a work line for the object to be transported supported by the object support tool, and the section in which the object support tool travels at a low level is the transport path. The transportation facility according to claim 1, wherein the transportation facility is a section intersecting with a crossing road that crosses, and a travel route of the transport traveling body is provided at a higher level than the crossing road.   The transport traveling body is supported by a lower guide rail and an upper guide rail via trolleys provided on both upper and lower sides thereof, the upper and lower guide rails, the cam rail, and the level switching device, The transfer equipment according to claim 1 or 2, wherein the transfer facility is supported by a pedestal installed on a floor surface, and the transported object support is moved up and down in a cantilevered manner on a lateral side of the pedestal.   The elevating support means is movable on a transporting traveling body that can move back and forth in parallel with the traveling direction, and can swing on the movable body in a vertical direction along a vertical plane parallel to the moving direction of the movable body. A swing link that is pivotally supported by the suspension and suspends the object support at the free end, and a short link interposed between an intermediate position of the swing link and the transport traveling body, With this short link, the transported object support is configured to move vertically up and down with the vertical swing of the swing link and the back and forth movement of the movable body. The transport equipment according to any one of claims 1 to 3, wherein the transport equipment is linked and linked to the link.   When there is a transport traveling body in a section where the object support is traveled at a low level, the swing link extends obliquely backward and downward with respect to the traveling direction of the transport traveling body, and the operation lever is tilted. The transport facility according to claim 4, wherein the transport facility is configured to extend rearward and upward.

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