JP5333709B2 - Lifting conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the versatility of an elevating conveyance device capable of being utilized for transferring an automobile body in an automobile assembling line, and to reduce the size and weight thereof. <P>SOLUTION: This elevating conveyance device is constituted in such a manner that a fixed column 3 of a multistage extensible column body 1 is provided with an elevation drive means 20 vertically driving an mid-stage elevating column 4a in a succeeding stage; the mid-stage elevating columns 4a and 5a are provided with bottle hanging type wound suspension strings 21a and 22a converting the ascending motion of the mid-stage elevating columns 4a and 5a with respect to the columns 3 and 4a in a front stage to the ascending motion of the mid-stage elevating column 5a in the succeeding stage or an elevating part 6a in a final stage with respect to the mid-stage elevating columns 4a and 5a; the final-stage elevating part 6a is provided with a conveying object support 14; a fluid pressure cylinder 37a energizing the mid-stage elevating column 4a at in succeeding stage in the ascending direction with respect to the fixed column 3 and fluid pressure cylinders 38A and 39A energizing the mid-stage elevating column 5a in the succeeding stage or the final-stage elevating part 6a in the ascending direction with respect to the mid-stage elevating columns 4a and 5a are provided. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an elevating / conveying device that can be used for transferring an automobile body in an automobile assembly line.

As an elevating / conveying device that can be used for transferring an automobile body or the like, as described in Patent Document 1, a device that includes a table lifter type elevating table mounted with a transfer means that can move in and out in the horizontal direction, There is known a drop lifter type or the like in which a lifting / lowering body that can be moved up and down along a column is equipped with a transfer means that can move in and out in the horizontal direction. An articulated robot type lifting and conveying device that can be used for a transfer device is also known.
Japanese Utility Model Publication No. 58-92221

  The table lifter type lifting and lowering transfer device and the articulated robot type lifting and lowering transfer device are rather layout-free, and can be freely installed and used on a solid floor surface, but the lift is relatively small. Can only be used with the listed points. Moreover, the articulated robot type lifting and lowering transfer apparatus has a drawback that the equipment cost is greatly increased although the degree of freedom of the transfer path is high. On the other hand, in the lifter type lifting and conveying apparatus as described in Patent Document 1, the lift is large, but the upper end of the column must be connected to and supported by a beam on the ceiling side, and the floor surface. It was not easy to install and use above. That is, there is a drawback that lacks versatility.

An object of the present invention is to provide an elevating / conveying apparatus that can solve the above-described conventional problems, and the elevating / conveying apparatus according to claim 1 uses the reference numerals of the embodiments described later. If it attaches and shows, the multistage expansion-contraction support | pillar body 1 which can be expanded-contracted to the up-down direction will be erected on the base 2, and this multistage expansion | extension support | pillar body 1 will be fixed to the base 2, the fixed support | pillar part 3, and this fixed At least one middle lift column 4a (5a) that can be raised and lowered with respect to the column 3 and a final lift 6a that can be raised and lowered with respect to the middle lift column 5a are provided. The lifting / lowering driving means 20 for moving the lifting / lowering support column 4a up and down is provided. The middle lifting / lowering support column 4a (5a) is provided with the upward movement of the middle lifting / lowering support column 4a (5a) relative to the previous support column 3 (4a). Next stage middle lifting column for middle lifting column 4a (5a) (5a) or a fishing bottle-type hanging rope 21a (22a) for conversion into the ascending motion of the final stage lifting / lowering part 6a is provided, and a transported object support part (transfer means 14) is provided on the final stage lifting / lowering part 6a. The fluid pressure cylinder 37A for urging the next-stage middle lifting column 4a in the upward direction with respect to the fixed column 3 and the middle-stage lifting column (5a) in the next stage with respect to the middle lifting column 4a (5a) Alternatively, in the lifting and lowering conveying device provided with the fluid pressure cylinder 38A (39A) for urging the final stage lifting unit 6a in the upward direction ,
In each of the fluid pressure cylinders 37A to 39A, cylinder main bodies 37a to 39a are attached to the support columns 3 to 5a on the front stage side, and piston rods 37b to 39b projecting from the cylinder main bodies 37a to 39a so as to freely move backward and forward. The fluid pressure cylinders 37A to 39A are arranged in a direction to suspend the next-stage middle lifting column 4a, 5a or the final lifting / lowering portion 6a. It is configured to generate a constant upward biasing force that is substantially balanced with the weight 6a of the middle lift column 4a, 5a or the final lift unit .

In carrying out the present invention having the above-described configuration, specifically, as described in claim 2 , the hydraulic cylinder 39A for urging the final stage elevating part 6a in the upward direction is a weight of the final stage elevating part 6a. The upward biasing force substantially balanced with W ₁ , the sum (W ₀ + W) of the weight of the final lifting unit and the weight W ₀ of the transported object W loaded on the transported object support (transfer means 14) it can be capable of constituting switched ₁₎ and the upward biasing force to substantially balance.

According to a third aspect of the present invention, the lifting / lowering driving means 20 includes a winding suspension line 25a that drives the next-stage middle lifting support section 4a to move up and down with respect to the fixed support section 3, and the winding suspension line 25a. The fluid pressure cylinder for urging the middle lifting column 4a in the next stage in the upward direction relative to the fixed column 3 as claimed in claim 4 It is also possible to share with 37A.

  The lifting / lowering conveying apparatus according to the present invention having the above-described configuration is configured such that the multi-stage telescopic support body extends upward and is supported even when the transported object support portion that moves up and down includes a load receiving table that moves in and out horizontally. In order to ensure the self-supporting stability when the load receiving table supporting the transported object has advanced and moved horizontally and laterally, the width of the multi-stage telescopic strut and the base in the loading / unloading direction is appropriately widened. By installing and fixing the base firmly on the floor, it can be freely installed and used anywhere on the floor, and can be used freely in the same layout as conventional table lifter type and articulated robot type lifting and lowering transfer devices. It can be used as an elevating and conveying device. In addition, the use of multistage telescopic struts can increase the lifting height of the transfer means, but without using large and heavy balance weights, the middle stage elevating strut part and the final stage elevating part can be separately fluidized. Since the weight is balanced by urging in the upward direction with the urging force of the cylinder, it is possible to move up and down a heavy object to be conveyed while reducing the size and weight of the entire apparatus.

That is, when the middle lifting column is lifted with respect to the previous column by the fishing bottle-type hanging suspension cable provided on the fixed column and the middle lifting column, the next column is moved to the middle lifting column. In a multistage telescopic strut body configured to move up the middle lifting / lowering strut part or the final lifting / lowering part, a balance weight is suspended from one end of a fishing bottle-type hanging suspension line provided on the fixed strut part. For example, when there are two middle lifting columns, the total weight of the final lifting unit is W ₁ , and the middle lifting is performed when the weight is balanced with all lifting parts (excluding the object to be transported). Assuming that the entire weight of the support column is W ₂ and W ₃ , the downward load weight F acting in the direction of lifting the balance weight on the fishing rod type hanging suspension cable of the fixed support column is F = 3W ₁ + 2W ₂ + W ₃ is required, and a large and heavy balance weight corresponding to F = 3W ₁ + 2W ₂ + W ₃ is required, and the increase in size and weight of the entire apparatus cannot be avoided.

  However, according to the present invention, the middle stage lifting column part and the final stage lifting part are individually urged in the upward direction by the urging force of the fluid pressure cylinder so as to balance the weight. The weight of each part will increase by the weight of the fluid pressure cylinder, but without using a large and heavy balance weight, the next stage middle lifting column is lifted up and down with respect to the fixed column. It is possible to realize a small and lightweight lifting / lowering transport device that can reduce the load weight acting on the driving means and can use the lifting / lowering driving means with small capacity even though it is a lifting / lowering transport device capable of lifting / lowering transporting a heavy object. It came to be. In addition, each fluid pressure cylinder that urges the middle stage lifting column and the final stage lifting unit separately in the upward direction drives the middle stage lifting column part of the next stage relative to the fishing bottle type hanging rope or the fixed column part When a suspended suspension rope is used as the lifting drive means, it becomes a damper when the suspended suspension rope breaks, and the safety of the lift column and the final lift is prevented by preventing the impact drop. Can do.

Furthermore , according to the configuration of the present invention , it is not necessary to apply a compressive force to the piston rod of each fluid pressure cylinder that urges the middle lifting column and the last lifting column separately in the upward direction. It can be utilized, and can be used to reduce the size and weight of the entire apparatus. In addition, the weight of all lifted parts in a state where the transported object is not transported up and down can be canceled by the upward biasing force of each fluid pressure cylinder, so that the transported object is relatively light or is transported This is effective when the weight of an object is not constant.

Of course, when the object to be transported is a heavy object of a constant weight, by adopting the configuration according to claim 2 , of course, when the empty last-stage lifting / lowering unit not loaded with the object to be transported is lifted / lowered. This means that even when transporting an object to be transported up and down, the entire lifting part is theoretically weightless by simply switching the urging force of the hydraulic cylinder that urges the final stage lifting part in the upward direction. It can be moved up and down with a driving force. If there are multiple types of objects to be handled and the weight is constant for each type, the urging force of the fluid pressure cylinder that urges the final stage lifting part in the upward direction is set to the weight of each object to be conveyed. Correspondingly, it may be configured to switch to a preset urging force.

Further, according to the configuration of claim 3, it is possible to easily easily implement lift driving means for vertically driving the next stage of the middle lifting struts with respect to the fixed support portion, arrangement according to claim 4 According to the present invention, the lifting drive means is also used as a fluid pressure cylinder that urges the next middle lifting / lowering column part in the upward direction with respect to the fixed column part, so that the number of parts of the entire apparatus is reduced and the structure is simplified. Can be further reduced in size and weight.

  Next, a first embodiment when the present invention is implemented as a transfer device will be described with reference to FIGS. 1 to 3 attached. Reference numeral 1 denotes a multistage telescopic support body, which is fixed to the floor surface with an anchor or the like. A fixed supporting column 3 standing on the base 2, a pair of left and right first middle lifting columns 4a, 4b supported on both right and left outer sides of the fixed supporting column 3, and the first middle lifting column A pair of left and right second middle lift columns 5a and 5b supported so as to be movable up and down on the outside of 4a and 4b, and a pair of left and right final stage lifts supported on the outside of the second middle lift columns 5a and 5b. It consists of parts 6a and 6b. The fixed support column 3 has a rectangular prism shape whose planar shape is long in the horizontal direction.

  Any lifting guide means may be used for each lifting column 4a to 5b and final lifting units 6a and 6b, but in this embodiment, the pair of left and right first middle lifting columns 4a and 4b are provided on the fixed column 3. A slide guide 7 fixed to the side surface and a slide guide rail 8 fixed to the inner side surface of the first middle stage elevating support columns 4a and 4b over its entire height and engaged with the slide guide 7 are supported so as to be movable up and down. The second middle stage lifting column parts 5a, 5b are fixed to the slide guide 9 fixed to the outside of the first middle stage lifting column parts 4a, 4b and the inner surfaces of the second middle stage lifting column parts 5a, 5b over the entire height. The pair of left and right final stage elevating parts 6a and 6b are fixed to the inner side surfaces of the final stage elevating parts 6a and 6b. Slide guide 11 and the second middle lifting struts 5a, and is vertically movably supported by the slide guide rail 12 which is secured over the total height to the outside of 5b were.

  Further, the first middle stage lifting column parts 4a, 4b and the second middle stage lifting column parts 5a, 5b have the same height as the fixed column part 3, and when they are at the lower limit position as shown in FIG. Is supported on the base 2 and its upper end is substantially flush with the upper end of the fixed column 3. On the other hand, the final stage elevating parts 6a and 6b have a height approximately half of the height of the fixed column part 3 and each of the middle stage elevating column parts 4a to 5b. Supported on the table 2.

  The pair of left and right final stage elevating parts 6a and 6b are connected and integrated at their lower ends by a horizontal connecting member 13 on the front side of the multistage telescopic support body 1, and at the central position in the length direction of the horizontal connecting member 13, a fixed support A transfer means 14 is provided as a transported object support portion so as to protrude forward from the portion 3 at a right angle. As shown in FIG. 2, the transfer means 14 includes a pair of left and right running forks 15a and 15b that move in and out horizontally in conjunction with each other. Each running fork 15a, 15b includes a fixed rail member 17 fixed on the base portion 16, a middle movable rail member 18 supported on the fixed rail member 17 so as to be movable in and out, and the middle movable rail member 18. It is made up of a rail material 19 for receiving cargo that is supported so as to be movable in and out. This exit / exit drive means is well known in the art, and when the intermediate movable rail member 18 is moved in and out of the fixed rail member 17, the load receiving rail is interlocked with the exit / exit movement of the intermediate movable rail member 18. The material 19 can be moved back and forth in the same direction with respect to the middle movable rail material 18. Therefore, as shown in FIG. 1A and FIG. 2A, there are a retracted position where the rail material 19 for receiving goods overlaps directly above the fixed rail member 17, and an advanced position separated laterally from the upper region of the fixed rail member 17. You can move between and out.

  The telescopic drive mechanism of the multistage telescopic strut body 1 will be described. As shown in FIG. 3, ascending / descending drive means 20 for driving the first intermediate lift struts 4 a and 4 b up and down relative to the fixed strut 3 is provided. The middle stage lifting / lowering struts 4a and 4b and the second middle stage lifting / lowering struts 5a and 5b are provided with fishing bottle type hanging ropes 21a, 21b, 22a and 22b. The elevating drive means 20 is stretched in the vertical direction by a pair of upper and lower guide wheels 23a, 23b, 24a, 24b on both left and right side portions of the fixed support column 3, and one place is first via the locking tools 26a, 26b. It is comprised from the endless winding suspension line 25a, 25b latched by the middle | upper stage raising / lowering support | pillar part 4a, 4b, and the drive device 27 which carries out interlocking rotation drive of these both endless suspension suspension lines 25a, 25b. The drive device 27 includes a motor 28, gear trains 29a and 29b for transmitting the rotation of the output shaft of the motor 28 to the upper guide wheels 23a and 24a of the endless hanging ropes 25a and 25b, and a winding transmission 30a. , 30b. Chains and wire ropes are used for the endless winding suspension cables 25a and 25b, and chains and timing belts are used for the winding transmissions 30a and 30b.

  As the elevating drive means 20, as long as the pair of left and right first middle elevating struts 4a and 4b can be driven up and down in synchronization, rack-and-pinion gears can be used in place of the endless winding suspension lines 25a and 25b. Various other methods using an electric screw shaft can be used.

  The fishing bottle-type hanging ropes 21a, 21b provided on the first middle lifting / lowering struts 4a, 4b are in a fishing bottle manner on the guide wheels 31a, 31b pivotally supported on the upper ends of the first middle lifting / lowering struts 4a, 4b. One end is locked to a position near the upper end of the fixed column 3 via the locking tools 32a and 32b, and the other end is locked to the second middle lifting column 5a via the locking tools 33a and 33b. , 5b. Further, the fishing bottle type hanging ropes 22a, 22b provided on the second middle stage lifting column parts 5a, 5b are connected to the guide wheels 34a, 34b pivotally supported on the upper ends of the second middle stage lifting column parts 5a, 5b. One end is locked to a position in the vicinity of the upper end of the first middle lifting column 4a, 4b via locking tools 35a, 35b, and the other end is locked via locking tools 36a, 36b. It is locked to the final stage elevating parts 5a and 5b. A chain and a wire rope are used for these fishing bottle type hanging ropes 21a, 21b, 22a, 22b.

  In addition, fluid pressure cylinders 37A and 37B for urging the first middle stage lifting column parts 4a and 4b in the upward direction are arranged on the left and right sides of the fixed column part 3, and the first middle stage lifting column parts 4a and 4b Is provided with fluid pressure cylinders 38A, 38B for urging the second middle stage lifting column parts 5a, 5b in the upward direction, and the second middle stage lifting column parts 5a, 5b are lifted with the final stage lifting parts 6a, 6b. Fluid pressure cylinders 39A and 39B that are urged in the direction are arranged.

  The fluid pressure cylinders 37A and 37B are connected via brackets 41a and 41b to brackets 40a and 40b projecting from positions near the upper ends of the left and right sides of the fixed column part 3 through the support shafts 41a and 41b. A free end of a piston rod 37b protruding from the lower end of the main body 37a is coupled to a position near the lower end of the first middle lifting / lowering support column portions 4a and 4b via support shafts 42a and 42b. The fluid pressure cylinders 38A and 38B are connected via brackets 44a and 44b to brackets 43a and 43b whose upper ends of the cylinder main bodies 38a project from positions near the upper ends of the first middle-stage lifting columns 4a and 4b, A free end of a piston rod 38b protruding from the lower end of the cylinder body 38a is coupled to a position near the lower end of the second middle lifting / lowering support column portions 5a and 5b via support shafts 45a and 45b. The fluid pressure cylinders 39A and 39B are connected via brackets 47a and 47b to brackets 46a and 46b whose upper ends of the cylinder body 39a project from positions near the upper ends of the second middle lifting / lowering support columns 5a and 5b. The free end of the piston rod 39b protruding from the lower end of the cylinder body 39a is coupled to a position near the lower end of the final stage elevating parts 6a and 6b via support shafts 48a and 48b.

  As shown in FIG. 5, the cylinder main body 37a of the fluid pressure cylinders 37A and 37B for urging the first middle stage lifting / lowering support columns 4a and 4b in the upward direction has a pressure adjusting device 49 on the side where the piston rod 37b is advanced. Fluid pressure supply pipes 50a and 50b are connected via pressure supply / release switching valves 51a and 51b, and cylinder bodies 38a of the fluid pressure cylinders 38A and 38B for urging the second middle stage lifting column 5a and 5b in the upward direction. The fluid pressure supply pipes 53a and 53b from the pressure adjusting device 52 are connected to the side on which the piston rod 38b is advanced via pressure supply / release switching valves 54a and 54b. Two pressure regulators 55 and 56 are provided for the fluid pressure cylinders 39A and 39B for urging the final lifts 6a and 6b in the upward direction, and fluid pressure is supplied from both pressure regulators 55 and 56. The pipes 57a, 57b and 58a, 58b are connected to one fluid pressure supply pipe 60a, 60b via the switching valves 59a, 59b, respectively. The fluid pressure supply pipes 60a, 60b connect the piston rod 39b of the cylinder body 39a. It is connected to the advancing side via pressure supply / release switching valves 61a and 61b.

Thus, each pressure adjusting device 49, 52, 55, 56 is connected to a pressure fluid (for example, compressed air) supply source 62, and the fluid pressure supplied from the pressure adjusting device 49 to the fluid pressure cylinders 37A, 37B. F ₄ (for example, air pressure, the same applies hereinafter) F ₄ is set to a size that substantially balances with the overall weight W _{3 of} the first middle lifting column 4 a, 4 b and is supplied from the pressure adjustment device 52 to the fluid pressure cylinders 38 A, 38 B. fluid pressure _{F 3,} the second middle lifting struts 5a, is set to the total weight _{W 2} and sized to substantially balance 5b, the fluid pressure _{F 2} supplied from the pressure adjusting device 55 hydraulic cylinder 39A, the 39B is , final stage elevating section 6a, is set on the total weight W ₁ and sized to substantially equilibrium 6b, and the fluid pressure F ₁ supplied from the pressure regulator 56 hydraulic cylinder 39A, the 39B is the final stage lifting Parts 6a, substantially in equilibrium with the sum _(W 0 + _{W 1)} of the total weight _{W 1} and the transfer means 14 weight _{W 0} of the carried object W of a substantially constant weight loaded on (conveyed object support portion) of 6b The size is set. In this embodiment, each of the fluid pressure cylinders 37A to 39B is arranged in a pair of left and right with respect to one elevating member. Therefore, actually, the fluid pressure supplied to each of the fluid pressure cylinders 37A to 39B is As shown in FIG. 5, it is half of the above F _{1 to} F ₄ .

  In the above configuration, as shown in FIGS. 1 and 3, when the multistage telescopic support column 1 is in the contracted state, and each of the middle stage lifting column parts 4a to 5b and the final stage lifting parts 6a and 6b are in the lower limit position, The transfer means 14 is in the lower limit position closest to the floor surface, and the piston rods 37b to 39b of each fluid pressure cylinder 37A to 39B are in the maximum extended state. In this state, each of the middle lift columns 4a to 5b and the final lifts 6a and 6b are the middle lift columns 6a and 6b or just below the middle lift columns 4a to 5b and the final lifts 6a and 6b. 4a to 5b and the support provided on the fixed support column 3, a load acts on the endless suspending ropes 25a and 25b and the fishing bottle suspending ropes 21a to 22b of the elevating drive means 20. It is desirable not to be configured. When configured in this way, when the multistage telescopic strut 1 is in the contracted state, the pressure supply / release switching valves 51a, 51b, 54a, 54b and 61a, 61b shown in FIG. 5 are switched to the open side, Supply of the pressure fluid with respect to each fluid pressure cylinder 37A-39B can be refused.

  Thus, the motor 28 of the driving device 27 of the elevating drive means 20 is operated from the state where the multistage telescopic strut body 1 is in the contracted state, and the first middle elevating strut portions 4a and 4b are lifted in an endless manner. If the ropes 25a and 25b are rotationally driven, the fishing bottle-type hanging ropes 21a and 21b included in the first middle stage lifting / lowering struts 4a and 4b are caused by the upward movement of the first middle lifting / lowering pillars 4a and 4b with respect to the fixed pillar 3. Are pulled down relatively by the locking tools 32a and 32b on the fixed column 3 side, and the second middle lifting column 5a and 5b are locked to the rising first middle lifting column 4a and 4b. It will be pulled up via 33a, 33b. Further, as a result of the upward movement of the second middle stage lifting column parts 5a, 5b with respect to the first middle stage lifting column parts 4a, 4b, the fishing bottle type hanging ropes 22a, 22b provided in the second middle stage lifting column parts 5a, 5b The first stage lifting / lowering columns 6a and 6b are locked to the first middle stage lifting / lowering columns 4a and 4b which are pulled down relatively by the locking members 35a and 35b on the side of the first middle lifting column 4a and 4b. It will be pulled up through the tools 36a and 36b.

  2 and 4, when the first middle stage lifting column 4a, 4b rises to the ascending limit position with respect to the fixed column 3, the first middle stage lifting column 4a, 4b The second middle stage lifting column parts 5a, 5b are raised by the same height as the rising height of the first middle stage lifting column parts 4a, 4b with respect to the fixed column part 3, and further, with respect to the second middle stage lifting column parts 5a, 5b. Thus, the final stage elevating parts 6a and 6b are raised by the same height as the first middle stage elevating column parts 4a and 4b with respect to the fixed column part 3, and finally the final stage elevating parts 6a and 6b are raised. It will rise to the limit position.

When the multistage telescopic support column 1 is extended from the contracted limit state to the extended limit state as described above, the fluid pressure cylinder 37A that urges each of the intermediate lift columns 4a to 5b and the final lift units 6a and 6b in the upward direction. When ~ 39B does not exist, the first middle stage lifting column 4a, 4b
W ₀ = weight of the workpiece W
W ₁ = Whole weight of final stage lifting parts 6a, 6b
W ₂ = Whole weight of the second middle stage lifting column 5a, 5b
When W ₃ = the total weight of the first middle lifting / lowering support columns 4a and 4b, when the transfer object W is not loaded on the transfer means 14,
f ₁ = 3W ₁ + 2W ₂ + W ₃
When the transported object W is loaded on the transfer means 14,
f ₂ = 3W ₀ + 3W ₁ + 2W ₂ + W ₃
Since gravity acts, in general, the first middle lifting column portion 4a with respect to the fixed support portion 3, 4b and is where for urging upward by the balance weight of the weight f ₁ or weight f _2, According to the configuration of the present invention described above, when the multistage telescopic support column 1 is extended, the pressure supply / release switching valves 51a, 51b, 54a, 54b, and 61a, 61b are switched to the pressure supply side, and the transfer means is further provided. 14 when the air switching valve 59a, 59b and is switched to the pressure control device 55 side fluid pressure _{F 2} the hydraulic cylinders 39A, supplied to 39B, when the object to be conveyed W is loaded into the transfer unit 14 as described fluid pressure _{F 1} by switching the switching valve 59a, 59b to the pressure regulator 56 side by supplying fluid pressure cylinders 39A, to 39B, first,
F ₁ = W ₀ + W ₁
F ₂ = W ₁
F ₃ = W ₂
F ₄ = W ₃
Therefore, regardless of whether the transported object W is loaded on the transfer means 14 or not, the entire lifted portion including the transported object W is theoretically weightless. Therefore, the endless suspending ropes 25a and 25b of the lifting drive means 20 are rotationally driven with a small driving force that overcomes the frictional resistance of each relative lifting part or the like, so that the multistage telescopic strut body 1 is moved from the contracted limit state. It can be extended to the extension limit state.

When there are a plurality of types having different weights W _{0 in} the transported object W to be handled, a plurality of pressure adjusting devices 56 capable of supplying fluid pressure F ₁ = W ₀ + W ₁ corresponding to the weight W ₀ for each type and the plurality of these pressure adjustment devices 56 A switching valve that is used by selectively switching the pressure adjusting device 56 may be used in combination. In addition, the pressure adjusting device 55 used when the transfer means 14 is empty and the pressure adjusting device 56 used when the transfer object W is loaded on the transfer means 14 are selectively used. Although configured as described above, it is also possible to use one variable pressure adjusting device capable of adjusting the fluid pressure to be output according to the load weight.

  When the transfer means 14 in the ascending limit position shown in FIGS. 2 and 4 is lowered and returned to the original descending limit position shown in FIGS. 1 and 3, the motor 28 of the driving device 27 of the raising / lowering driving means 20 is reversed. The end stage lifting and lowering parts 6a and 6b are driven to reversely rotate in the direction in which the first middle stage lifting column parts 4a and 4b are pulled down, so that the final stage lifting parts 6a and 6b become the second middle stage lifting column parts. The second middle stage lifting column 5a, 5b is lowered to the lower limit position with respect to the first middle lifting column 4a, 4b, and further, the first middle lifting column 4a, 4b descends to the lower limit position with respect to the fixed support column 3, and finally, the transfer means 14 that was in the upper limit position shown in FIGS. 2 and 4 returns to the original lower limit position shown in FIGS. It will return to descent.

  As described above, the transfer means 14 capable of moving up and down between the lower limit position and the upper limit position by expanding and contracting the multistage telescopic support column 1 between the contraction limit state and the extension limit state, Since it can be moved horizontally between the retreat limit position shown in FIG. 1A and the advance limit position shown in FIG. 2A, for example, as shown in FIG. 1A and FIG. The apparatus is installed on a floor-side transport line 64 using a transport carriage 63 that travels on a certain travel route on the floor surface, and an upper floor slab 65 positioned directly above the floor-surface transport line 64. This can be used as means for transferring the object W to be transferred to and from the load receiving table 66.

  The up-and-down movement of the transfer means 14 accompanying the expansion and contraction operation of the multistage telescopic support body 1 and the horizontal movement between the retreat limit position and the advance limit position of the running forks 15a and 15b provided in the transfer means 14 The lifting and lowering operations of the transported object W by the forking operation in combination are well known in the art and will not be described here. However, in the example shown in FIGS. 1A and 2A, at the predetermined position of the transport line 64 on the floor surface. The to-be-conveyed object W mounted on the transport carriage 63 that has stopped is moved forward to the advance limit position of the running forks 15a, 15b of the transfer means 14 at the lower limit position, and the transfer means from the lower limit position. By the movement operation of scooping the object to be transported consisting of 14 unit amount ascending movement and the retreating movement of the running forks 15a, 15b from the advance limit position to the retreat limit position, Taken after this, is raised to the ascent limit position transfer means 14 loaded with the transported object W. Then, on the transfer means 14, the transfer object 14 is moved down by combining the moving movement of the running forks 15 a, 15 b and the lifting and lowering movement of the transfer means 14. Can be lowered onto the load receiving table 66 of the upper floor slab 65. Of course, on the contrary, it is also possible to transfer the object W to be transferred from the load receiving table 66 of the upper floor slab 65 to the transfer carriage 63 stopped at a predetermined position on the floor transfer line 64.

  In the first embodiment, the object W to be transported supported by the transfer means 14 and moved up and down has the retreat limit position of the running forks 15a and 15b in the transfer means 14 such that Since it is a position projecting laterally, the transfer means 14 is supported in a cantilevered manner by the final lift parts 6a and 6b even when the running forks 15a and 15b are in the retreat limit position. A large rotational (falling) moment acts on the horizontal connecting member 13 that supports the transfer means 14 and, consequently, the multistage telescopic support body 1. In addition, the floor area occupied by the transfer device also increases.

  Next, a second embodiment for solving the above problems will be described with reference to FIGS. 6 to 9. In this embodiment, two multistage telescopic support bodies 67 </ b> A and 67 </ b> B are arranged in parallel. Each of the multistage telescopic struts 67A and 67B is arranged on the side of the fixed struts 3a and 3b that are erected on the common base 68 so as to face each other, the first middle elevating struts 4a and 4b and the second middle elevating struts 5a. , 5b, and final stage elevating parts 6a, 6b are arranged in the same manner as in the previous embodiment, and a pair of left and right final stage elevating parts located on the mutually facing sides of both multistage telescopic struts 67A, 67B. A horizontal connecting member 13 is installed between the lower ends of the parts 6 a and 6 b, and the transfer means 14 is mounted on the horizontal connecting member 13.

  In this embodiment, the running forks 15a and 15b at the retreat limit position of the transfer means 14 are positioned between the pair of left and right multistage telescopic support bodies 67A and 67B (between the pair of left and right final stage elevating parts 6a and 6b). Therefore, the distance between the pair of left and right multistage telescopic strut bodies 67A and 67B (between the pair of left and right final stage elevating parts 6a and 6b) is such that the transported object W supported by the running forks 15a and 15b is a pair of left and right multistages. It is set so that it can be pulled in between the telescopic struts 67A and 67B (between the pair of left and right final stage lifting parts 6a and 6b). In addition, since the structure of the raising / lowering guide means of each middle stage raising / lowering support | pillar part 4a-5b and final stage raising / lowering part 6a, 6b is fundamentally the same as the structure of previous 1st Embodiment, it attaches | subjects the same referential mark to a figure. Although not described here, the expansion / contraction drive mechanisms of both the multistage expansion / contraction support bodies 67A and 67B are slightly different from those of the first embodiment.

  In other words, in the second embodiment, the elevating drive means 20A and 20B are disposed for each of the multistage telescopic support bodies 67A and 67B. These elevating drive means 20A, 20B include endless suspending suspension lines 25a, 25b for elevating and driving the first middle elevating strut portions 4a, 4b in the multistage telescopic struts 67A, 67B, and these endless suspending suspension lines 25a. , 25b, and drive devices 27a, 27b that individually drive the upper guide wheels 23a, 23b of the endless suspending ropes 25a, 25b and the winding transmissions 30a, 30b. There are two motors 28a and 28b that are interlocked and connected to each other via the two motors 28a and 28b so that the first middle stage elevating column parts 4a and 4b in the multistage telescopic column bodies 67A and 67B can be driven up and down synchronously. 28b are electrically operated synchronously. Of course, the upper guide wheels 23a, 23b of the endless suspending ropes 25a, 25b in both the multistage telescopic struts 67A, 67B are mechanically connected to each other using an interlocking shaft supported horizontally along the common base 68. It is also possible to link the two endlessly hanging suspension ropes 25a and 25b with one motor using the interlocking means.

  As the transfer means, there is known a type in which the running forks 15a and 15b can move forward and backward with the retreat limit position as the home position. As shown in FIG. If the second embodiment is configured using the transfer means 69, the transferred object W can be transferred to either the front or rear side relative to the lifting / lowering transfer position between the two multistage telescopic support columns 67A, 67B. Therefore, for example, as shown in FIG. 10, when the on-floor transfer line 64 and the overhead conveyor line 70 are laterally separated in the plan view, the on-floor transfer line 64 and the overhead conveyor in the plan view. A transfer carriage 63 installed at the intermediate position with respect to the line 70, stopped at a fixed position on the transfer line 64 on the floor, and an overhead Carried object W between the object to be conveyed suspended transport hanger 71 stops in position on Nbeyarain 70 may be configured to transfer.

  Moreover, in the above embodiment, a pair of left and right middle lifting columns and final lifting columns are provided side by side, and the pair of right and left middle lifting columns and final lifting columns are configured to move up and down synchronously or integrally. However, when the transported object W is a small and light object, as shown in FIG. 11, the fixed support column 3, one first middle lifting column 4, one second middle lifting column 5, and 1 The present invention can also be implemented as an elevating / conveying device using a multistage telescopic support 72 composed of two final elevating parts 6. Reference numeral 73 denotes a transported object support base protruding in a cantilever manner from the final lifting / lowering unit 6. In the figure, reference numerals 21 and 22 denote fishing bottle-type suspension ropes, reference numerals 31 and 34 denote guide wheels, reference numerals 32, 33, 35, and 36 denote end locking devices for the fishing bottle-type suspension ropes 21 and 22, and reference numerals 37 to 39 denote fluids. Pressure cylinders, respectively, in the above-described embodiment of the fishing bottle type hanging ropes 21a-22b, guide wheels 31a, 31b, 34a, 34b, locking tools 32a-33b, 35a-36b, and fluid pressure cylinders 37A-39B. Since it corresponds, description is abbreviate | omitted.

  As shown in the embodiment of FIG. 11, a fluid pressure cylinder 74 can also be used as the lifting drive means 20 that drives the first middle lifting lift column 4 up and down with respect to the fixed support column 3. In the illustrated fluid pressure cylinder 74, the cylinder body 75a is connected to the fixed support column 3 side by the support shaft 76, and the tip of the piston rod 75b that protrudes upward is connected to the first middle lifting column 4 side by the support shaft 77. However, like the fluid pressure cylinders 37 to 39 and 37A to 39B, the cylinder body 75a is connected to the first middle stage lifting column 4 side, and the tip of the piston rod 75b protruding downward is fixed to the fixed column 3 side. You may connect to. Of course, the fluid pressure cylinders 37 to 39 and 37A to 39B are turned upside down so that the cylinder body is connected to the fixed support column or the up-and-down support column in the same manner as the fluid pressure cylinder 74, and the piston protrudes upward. You may connect the front-end | tip of a rod to the raising / lowering support | pillar part of the next stage side, or the last stage raising / lowering part 4. FIG. As shown in FIG. 11, when using a fluid pressure cylinder 74 as the lifting drive means 20, the fluid pressure cylinder 37 that urges the first middle lifting column 4 in the upward direction with respect to the fixed column 3 is omitted. The fluid pressure cylinder 74 as the lifting drive means 20 can also be used as a fluid pressure cylinder 37 as a balance weight for urging the first middle lifting column 4 in the upward direction. In other words, the elevating drive means 20 can also be used as a fluid pressure cylinder as a balance weight for urging the first middle elevating support column 4 in the upward direction.

  In the embodiment of FIG. 11, there is one first middle lifting / lowering support column 4 that is lifted / lowered by the lifting / lowering driving means 20, and it is necessary to drive the pair of left and right first middle lifting / lowering support columns 4 a and 4 b in synchronization. Therefore, it is easy to configure the lifting drive means 20 by the fluid pressure cylinder 74. However, even in the lifting transport device using the pair of left and right first middle stage lifting columns 4a and 4b, the pair of left and right first If an interlocking mechanism that synchronizes the vertical movement of the middle lifting column 4a, 4b is used in combination, the fluid pressure is also used as the lifting drive means 20 in the above embodiment using the pair of left and right first middle lifting columns 4a, 4b. A cylinder can be used.

  In the above embodiment, the first middle lifting column 4a, 4b and the second middle lifting column 5a, 5b are provided as the middle lifting column, but if the lifting height required for the transfer means 14 is small, The second middle lifting column 5a, 5b can be omitted, and conversely, when the lift required for the transfer means 14 is large, three or more middle lifting columns can be provided. Of course, the use example of the transfer device is not limited to the illustrated one.

  Further, the lifting and lowering conveying apparatus of the present invention has a transfer means 14 as a moving object supporting portion that moves up and down, specifically, a transfer means 14 provided with a horizontally-movable load receiving platform comprising running forks 15a and 15b. However, even if the transfer means 14 for transferring the object to be transferred in the horizontal direction is installed in the object support part that moves up and down as in the above embodiment, the conveyor is not limited to the running fork type. Various well-known transfer means such as a push-push method for pulling out and pulling out can be used. Of course, only the guide rail of the carriage can be laid on the transported object support portion that moves up and down, and the carriage can be transferred to and from the guide rail that is laid on the mating floor. In some cases, it is also possible to provide only a transported object support surface as a transported object support part that moves up and down, and to be able to transfer a hand cart or the like to the other floor surface.

1-5 is a figure which shows the transfer apparatus of 1st embodiment, Comprising: FIG. 1A is a side view which shows the state when transferring a to-be-conveyed object between the conveyance trolleys of a conveyance line on a floor surface. FIG. 1B is a front view of the transfer device in the same state. Fig. A is a side view showing a state when an object to be transferred is transferred to and from the load receiving platform of the upper floor slab, and Fig. B is a front view of the transfer device in the same state. It is a front view which shows the expansion-contraction drive mechanism of the multistage expansion-contraction support | pillar body in a contracted state. It is a front view which shows the expansion-contraction drive mechanism of the multistage expansion-contraction support body when it exists in an expansion | extension state. It is a figure explaining the piping system of the balancer mechanism of a multistage expansion-contraction support body. 6-9 is a figure which shows the transfer apparatus of 2nd embodiment, Comprising: FIG. 6A is a side view which shows a state when transferring a to-be-conveyed object between the conveyance trolleys of a conveyance line on a floor surface. FIG. 6B is a front view of the transfer device in the same state. Fig. A is a side view showing a state when an object to be transferred is transferred to and from the load receiving platform of the upper floor slab, and Fig. B is a front view of the transfer device in the same state. It is a front view which shows the expansion-contraction drive mechanism of the multistage expansion-contraction support | pillar body in a contracted state. It is a front view which shows the expansion-contraction drive mechanism of the multistage expansion-contraction support body when it exists in an expansion | extension state. It is a side view which shows the transfer apparatus of 3rd embodiment. It is a side view which shows the transfer apparatus of 4th embodiment.

Explanation of symbols

1, 67A, 67B, 72 Multi-stage telescopic column body 2, 68 Base 3, 3a, 3b Fixed column part 4, 4a, 4b First middle stage lifting column part 5, 5a, 5b Second middle stage lifting column part 6, 6a, 6b Final stage elevating part 7, 9, 11 Slide guide 8, 10, 12 Slide guide rail 13 Horizontal connecting member 14, 69 Transfer means 15a, 15b Running fork (load receiving stand)
20 Lifting drive means 21, 22, 21 a to 22 b Fishing bottle type hanging ropes 25 a, 25 b Endless hanging ropes 27, 27 a, 27 b Driving devices 28, 28 a, 28 b Motors 37 to 39, 37 A to 39 B Fluid pressure cylinder 49 , 52, 55, 56 Pressure adjusting device 51a, 51b, 54a, 54b, 61a, 61b Pressure supply / release switching valve 59a, 59b Switching valve 62 Pressure fluid (for example, compressed air) supply source 63 Conveying carriage 64 Conveying line on floor 40 Upper floor slab 66 Load receiving table 70 Overhead conveyor line 71 Hanger for transporting suspended object

Claims (4)

A multi-stage telescopic strut that can be vertically expanded and contracted is erected on the base, and the multi-stage telescopic strut is a fixed strut fixed on the base and at least one middle stage that can be raised and lowered relative to the fixed strut. The lifting / lowering strut part and the final lifting / lowering part that can be moved up and down with respect to the middle lifting / lowering strut part are provided. Is provided with a fishing-line-type suspending rope that converts the upward movement of the middle lifting column with respect to the previous column to the rising movement of the middle lifting column or the final lifting unit with respect to the middle lifting column, The final stage lifting / lowering part is provided with a transported object support part, a fluid pressure cylinder for urging the middle stage lifting / lowering column part in the upward direction with respect to the fixed column part, and a second stage with respect to the middle stage lifting / lowering column part. Energize the middle lifting column or the last lifting column in the upward direction In lifting transfer apparatus and the fluid pressure cylinder is provided,
In each of the fluid pressure cylinders, the cylinder main body is attached to the support column on the front stage side, and the piston rod that protrudes from the cylinder main body so as to be able to move backwards and forwards suspends the middle lift column support section or the final lift unit on the next stage side. The fluid pressure cylinders are arranged in a downward direction, and each of the fluid pressure cylinders generates a constant upward biasing force that substantially balances the weight of one middle lift column or the last lift unit directly biased by each fluid pressure cylinder. Conveying device. The fluid pressure cylinder for urging the final stage lifting unit in the upward direction has a constant upward biasing force that is substantially balanced with the weight of the final stage lifting unit, the weight of the final stage lifting unit, and its transported object support unit. The elevating and conveying apparatus according to claim 1, wherein the elevating and conveying apparatus is configured to be switchable to an upward biasing force that is substantially balanced with the sum of the weight of the loaded objects to be conveyed . The said raising / lowering drive means consists of a winding suspension line which raises / lowers the middle stage raising / lowering support | pillar part of the next stage with respect to a fixed support | pillar part, and a drive device which drives this winding suspension rope. Lifting and lowering transport device. The elevating / lowering means according to any one of claims 1 to 3, wherein the elevating / lowering driving means is also used in the fluid pressure cylinder that urges the middle elevating / lowering strut portion of the next stage relative to the fixed strut portion in the upward direction. Conveying device.

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