JP5842025B2 - Work transfer system - Google Patents

Description

  The present invention relates to a workpiece transfer system, and more particularly to a workpiece transfer system including a transfer table that moves a workpiece from a high place to a low place by lowering a movable table.

  For example, the members constituting the power engine of the transportation equipment often have a complicated shape. For this reason, it is difficult to obtain the member by a single plastic working (for example, forging), and in general, the member is manufactured through a plurality of plastic workings. At this time, when there is a distance from the first plastic working apparatus that performed the previous plastic working to the second plastic working apparatus that performs the next plastic working, the work is temporarily stored in a stock yard or the like. . That is, the movement of the workpiece such as carrying in from the first plastic working device to the stock yard and carrying out from the stock yard to the second plastic working device is performed. The same applies to the case of sequentially assembling an assembly by combining a plurality of members.

  Carry-in and carry-out are performed via a transport carriage loaded with workpieces. That is, for example, a workpiece that has been subjected to plastic working by the first plastic working device is paid out from the payout conveyor and transferred to the transport carriage. Thereafter, the workpiece is transferred to the stock yard along with the transfer carriage.

  Here, the transfer from the payout conveyor to the transport carriage may be performed manually by a worker (manpower). However, most of the members and assemblies as described above are made of a metal material and have a large shape. Therefore, it is also heavy. For this reason, at the time of transfer, there may be a case where the worker is a single woman and the labor becomes heavy work or the work cannot be performed depending on the case. For the above reasons, the majority of cases require a plurality of workers.

  Various automatic transfer devices have been proposed in order to reduce the load on the operator. As the automatic transfer device, an appropriate type is selected according to the size of the workpiece and the size of the weight. That is, if the work is a lightweight cardboard case or the like, a robot or the like having a gripping hand is adopted, and if it is a large plastic case or wooden box, a lift (elevator) or the like is adopted.

  This type of automatic transfer device requires a power source such as electric power. Therefore, it is difficult to save power, in other words, to reduce the cost required for transfer.

  Patent Document 1 proposes a transport carriage (transfer device) that employs a link mechanism and is capable of transferring a workpiece from a high place to a low place under the action of the link mechanism. The link mechanism in this transport cart operates without requiring a power source. Therefore, it is considered that the cost required for transfer can be reduced.

JP 2009-107429 A

  In the transport cart described in Patent Document 1, when the loading mechanism is lowered by causing the link mechanism to function, the roller conveyor constituting the loading platform is inclined with respect to the horizontal direction. For this purpose, the work slides along the roller conveyor and is transferred to the roller conveyor in the warehouse.

  In this case, when the weight of the workpiece is large, the momentum caused by gravity is applied to the sliding motion when the roller conveyor of the loading platform is inclined. Depending on the degree of momentum, there is a concern that the workpiece may fall beyond the roller conveyor in the warehouse. For this reason, it is difficult to employ | adopt as a conveyance trolley for transferring the member etc. which comprise the motive power engine of transport equipment. This is because the members and the like constituting the power engine of the transportation equipment have a large shape and a large weight as described above, and therefore, momentum is easily generated when sliding on the roller conveyor of the loading platform.

  In addition, when the workpiece is a laminate in which a plurality of containers are stacked, there is a concern that the container collapses when the loading platform is inclined.

  Further, as can be understood from the above, the workpiece may be, for example, a first intermediate paid out from the first plastic working device or a second intermediate paid out from the second plastic working device. There are multiple types, such as bodies and assemblies. In this case, for example, the height position may be different between the transfer destination of the first intermediate and the transfer destination of the second intermediate. In this case, it is originally desirable to be able to change the descending amount of the loading platform according to the height position of the transfer destination (in other words, the type of workpiece). However, Patent Document 1 does not describe a configuration for making the amount of lowering variable, and as a result, can only deal with a single type of workpiece.

  The present invention has been made to solve the above-described problems, and is easy to transfer even when the workpiece is heavy or laminated, and in some cases, the workpiece is lowered according to the type of the workpiece. Another object of the present invention is to provide a workpiece transfer system that can change the amount and can reduce the cost required for transfer.

In order to achieve the above object, a workpiece transfer system according to the present invention comprises a frame formed by connecting hollow tube members including a plurality of sliding pipes, and a workpiece is placed thereon. And a movable base provided with a roller conveyor for sliding the workpiece,
A hollow tube member frame formed by connecting, and has a plurality of sliding pipes, each of which slidably engaged with the sliding pipe, the movable table in the horizontal position A base that can be moved up and down;
An elastic means connected to the movable table and the base table to cushion the lowering of the movable table and capable of raising the movable table after the workpiece is removed from the movable table;
A stop mechanism for stopping the descent of the movable table;
A moving means provided on the base for moving the base and the movable base supported by the base;
Including a transfer table having
The stop mechanism includes at least a first hole group including holes provided at a first height position of each of the sliding contact pipes, and a second hole group provided at a second height position. And a stopper member is removably passed through either the hole forming the first hole group or the hole forming the second hole group,
When the movable base is lowered to a predetermined position, the stopper member blocks the sliding pipe, so that the movable base can be stopped in a horizontal posture at a plurality of positions having different heights. ,
The workpiece is transferred to the transfer destination via the transfer table by sliding the workpiece toward the transfer destination by the roller conveyor from the movable table that is lowered by placing the workpiece. It is characterized by.

  In this configuration, when a work is placed on the movable table, a predetermined load is applied to the elastic means based on the weight of the work, and the movable table is lowered while sliding on the base. Along with this, the work placed on the movable table also descends. And when a movable stand will be in a predetermined position, it will stop under the action of a stop mechanism. By setting the stop position to be approximately the same as the height of the transfer destination, for example, the workpiece can be easily transferred from the movable table to the transfer destination.

  And after a workpiece | work is transferred to a transfer destination, a movable stand raises under the effect | action of an elastic means. For this reason, the transfer operation | work to a transfer destination can be performed repeatedly.

  In this configuration, the movable base only moves up and down, and the movable base does not tilt. Therefore, when the workpiece is transferred to the transfer destination, the workpiece is not momentum due to gravity. For this reason, the concern that the workpiece falls from the transfer destination is eliminated. Moreover, even if the workpiece is a laminate, there is no fear of collapsing.

  Since the movable table is raised and lowered by elastic means, a power source such as electric power is not particularly required. For this reason, power saving can also be achieved. Therefore, the cost required for transfer can be reduced.

  The movable base and the base can be configured from a frame formed by connecting hollow tube members. A suitable specific example of the hollow tube member is a commercially available round pipe or square pipe.

  This type of pipe is widely distributed as a material for assembling display shelves and storage shelves. For this reason, it is cheap and can be obtained easily. Moreover, it is robust despite being lightweight. Therefore, the movable base and the base that are lightweight and excellent in durability can be configured at low cost.

  The material of the hollow tube member is not particularly limited, and examples thereof include metals and resins. However, in consideration of placing a heavy workpiece, metals such as aluminum alloy and stainless steel are used. preferable.

Even in such a case, at least one portion which is in sliding contact with each other in the base and the movable base, i.e., the sliding surface of the sliding contact pipe, or to at least one of the sliding surface of the sliding pipes, resin It is preferable to dispose a member. For this purpose, for example, a resin sheet may be attached to at least one of the two sliding contact surfaces. Or even sliding pipe is properly at least one of the sliding pipes, may be formed from a resin member. Preferable examples of the resin include engineering plastics including polyamide.

  This type of resin is excellent in wear resistance. For this reason, it can avoid that a sliding contact surface wears out or a damage | wound generate | occur | produces on a sliding contact surface.

  Further, the elastic means can be constituted by a member exhibiting elasticity such as a coil spring, but another suitable example is an air damper. This is because the air damper is also a commercially available product and is easily available and inexpensive, and it is easy to adjust the degree of buffering.

  When an air damper is employed, the amount of descent of the movable base can be easily adjusted by setting the number of air dampers or the amount of expansion / contraction of the rod. That is, for example, when the number of air dampers is increased, or when the amount of expansion and contraction of the rod is set to be small, the amount by which the movable base is lowered can be reduced. On the contrary, when the number of air dampers is reduced or when the amount of expansion / contraction of the rod is set large, the amount of lowering of the movable table can be increased.

  By doing in this way, the descending amount of the movable table can be made variable. Therefore, it is possible to cope with a plurality of transfer destinations having different heights by one transfer table. That is, it is not particularly necessary to prepare a plurality of transfer tables, and thus a large space is not required to store the plurality of transfer tables.

The stop mechanism can be configured to include, for example, a stopper member provided on the base. In this configuration, when the movable base is lowered, the sliding pipe comes into contact with the stopper member and is blocked. With this damming, the movable base can be stopped. The stopper member can be composed of, for example, a rod body such as a pin, or a bolt / nut. On the other hand, a holding hole for holding the stopper member may be formed on the base.

  In this case, although the structure is extremely simple, it is easy to stop, in other words, position and fix the movable base. In addition, what is necessary is just to remove a workpiece | work in order to raise a movable stand.

  The height of the workpiece transfer destination may vary depending on the type of workpiece. In order to cope with this, it is preferable that the stop mechanism is configured such that the movable base can stop at a plurality of positions having different heights.

  For this purpose, for example, a plurality of holding holes with different height directions may be formed in the base, and the stopper member may be held in one of them. In each case, the movable base can be stopped at a plurality of positions having different heights by engaging the stopper member with one of a plurality of holding holes having different height positions. Become.

  And a wheel is mentioned as a suitable example of a moving means. This is because the wheel is also a commercial product and is easily available and inexpensive. And since it rotates easily on the floor of a work station, it is easy to move a transfer stand.

  Here, it is preferable to provide a guide means for guiding the moving means in order to prevent the moving means from turning in an unexpected direction, and thus the transfer table from moving in an unexpected direction. This guide means may be provided on the floor of a station that performs the work of placing the work on the movable table.

  By providing the guide means, it becomes easy to interpose the transfer table between the transfer source and the transfer destination. In addition, when the workpiece is transferred from the transfer source to the transfer table, the transfer table can be restricted from moving. This restriction is particularly effective when the weight of the workpiece is large.

  If the guide means is fixed to the floor in a non-detachable manner, it may become an obstacle when other work is performed at the same work station. Therefore, it is preferable to install the guide means so as to be detachable from the floor of the work station. In this case, it is possible to remove the guiding means from the floor when the guiding means is unnecessary.

  In order to make the guide means detachable, for example, the guide means may be positioned and fixed to the floor with a bolt. Alternatively, an insertion hole may be formed in the floor, and a pin provided in the guide means may be fitted into the insertion hole.

  According to the present invention, when the movable base is supported to be movable up and down with respect to the base, and when a work is placed on the movable base, a predetermined load is applied to the elastic means based on the weight of the work. Along with this, the movable base is lowered with respect to the base. Following the lowering of the movable table, the work placed on the movable table is also lowered. Thereafter, when the movable table descends to a predetermined position, the movable table stops under the action of the stop mechanism. By setting the stop position to be approximately the same as the height of the transfer destination, for example, the workpiece can be easily transferred from the movable table to the transfer destination.

  The movable base only moves up and down and does not tilt. Therefore, when the workpiece is transferred to the transfer destination, the workpiece is not momentum due to gravity. For this reason, the concern that the workpiece falls from the transfer destination is eliminated. Moreover, even if the workpiece is a laminate, there is no fear of collapsing.

  After the workpiece is transferred to the transfer destination, the movable table is automatically raised under the action of the elastic means from which the load is removed. For this reason, the transfer operation | work to a transfer destination can be performed repeatedly.

  The movable table is raised and lowered by elastic means. Therefore, it is not particularly necessary to use a power source such as electric power to raise and lower the movable table. For this reason, power saving can be achieved and the cost required for transfer can be reduced.

It is the simple top view which showed typically the workpiece transfer system which concerns on embodiment of this invention. FIG. 2 is an overall schematic perspective view of a transfer table (transfer cart) included in the workpiece transfer system of FIG. 1. FIG. 3 is an overall schematic perspective view of a base constituting the transfer carriage of FIG. 2. It is a whole schematic perspective view of the movable stand which comprises the trolley | bogie for transfer of FIG. It is a principal part schematic perspective view which shows the vicinity of the site | part in which the stopper member which comprises a stop mechanism was provided. 6A to 6D are flowcharts showing a process of transferring a workpiece from the transfer carriage to the transfer carriage (transfer destination), and the solid line is transferred to the transfer carriage having the mounting portion at a high position. The imaginary line represents a case where the placement unit is transferred to a transport carriage at a low position.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a workpiece transfer system according to the invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a simplified plan view schematically showing a workpiece transfer system 10 according to the present embodiment. The workpiece transfer system 10 includes, for example, a transfer carriage 14 (transfer table) that receives a container 12 (work) delivered from a predetermined apparatus, and a transfer carriage that receives the container 12 from the transfer carriage 14. It has a carriage 16, a first guide rail 18 (guide means) for guiding the transfer carriage 14, and a second guide rail 20 for guiding the transfer carriage 16.

  The container 12 includes a storage container made of a rectangular parallelepiped casing and a lid member that closes the storage container (both not shown). In the storage container, for example, a forged intermediate product or molded product, an assembly, or the like is stored, and then a lid member is placed thereon. The outer dimensions, volume, color, and the like of the container 12 are different corresponding to the different contents to be stored. That is, there are multiple types of containers 12 that are works.

  The transfer carriage 14 receives the container 12 delivered from the predetermined apparatus to the delivery conveyor 24 at the work station 22 and then passes it to the transportation carriage 16. That is, the container 12 is transferred from the delivery conveyor 24 to the transfer carriage 16 via the transfer carriage 14.

  First, the first guide rail 18 and the second guide rail 20 will be described. The first guide rail 18 is configured by a first track member 26a and a second track member 26b facing each other. The first track member 26a and the second track member 26b are spaced apart from each other at a predetermined interval, and two of the four wheels 28a to 28d (wheels 28a) of the transfer carriage 14 are formed in a clearance formed thereby. 28d) is inserted.

  End portions of the first track member 26a and the second track member 26b are bent in directions away from each other. For this reason, the inlet or outlet of the first guide rail 18 has a shape that is expanded with respect to other parts.

  The first track member 26a and the second track member 26b are positioned and fixed to the floor 30 (see FIG. 2) of the work station 22 by, for example, bolts (not shown). The first track member 26a and the second track member 26b (first guide rail 18) are removed from the floor 30 by screwing the bolt in the disengagement direction. That is, the first track member 26a and the second track member 26b are detachably installed on the floor 30 of the work station 22.

  The remaining second guide rail 20 is configured according to the first guide rail 18 except that the remaining second guide rail 20 includes the third track member 32a and the fourth track member 32b. For this reason, detailed description is omitted. Two of the four wheels 33a to 33d (wheels 33a and 33d) of the transport carriage 16 are inserted into the clearance between the third track member 32a and the fourth track member 32b.

  Next, the transfer carriage 14 will be described in detail. As shown in FIGS. 2 to 4, the transfer carriage 14 includes a base 34 and a movable base 36 supported by the base 34 so as to be movable up and down. Below the base 34, four wheels 28 a to 28 d that allow the transfer carriage 14 to slide on the floor 30 of the work station 22 are provided. That is, the wheels 28a to 28d function as moving means for moving the base 34 and the movable base 36. Note that the wheels 28a to 28d are not provided with a rotation mechanism that can rotate about the mounting shaft. For this reason, the transfer carriage 14 can only go straight.

  In this Embodiment, the base 34 and the movable stand 36 consist of a frame formed by connecting the round pipe which is a hollow tube member. In short, the base 34 and the movable base 36 are configured by connecting round pipes via joints. Each round pipe is preferably made of a resin-coated steel pipe unless otherwise specified.

  As shown in FIG. 3, the bottom of the base 34 is configured by connecting two lower short pipes 40a and 40b and lower long pipes 42a and 42b so as to form a rectangle. The wheels 28a to 28d are arranged at the four corners of the bottom, that is, below the connecting portion (lower joint 43) of the lower short pipes 40a and 40b and the lower long pipes 42a and 42b. It is attached to the bottom part of the base 34 by being fitted in the fitting hole.

  Further, two first horizontal reinforcing pipes 44a and 44b are bridged between the lower short pipes 40a and 40b, and one lower fixing pipe 46 is bridged between the lower long pipes 42a and 42b. .

  Support pillars 48a to 48d are erected on the four corners of the bottom, that is, above the connecting portion (lower joint 43) of the lower short pipes 40a and 40b and the lower long pipes 42a and 42b. In the vicinity of the support columns 48a to 48d, sliding contact pipes 50a to 50d are arranged in parallel with the support columns 48a to 48d.

  In the present embodiment, stainless steel pipes are employed as the sliding contact pipes 50a to 50d. These sliding contact pipes 50a to 50d are slightly smaller in diameter than structural pipes such as support columns 48a to 48d. This is because the sliding pipe 104 of the movable table 36 described later can easily slide.

  The support columns 48a to 48d and the sliding contact pipes 50a to 50d are connected through the lower joint 43 and the upper joints 51a and 51b. An upper short pipe 52a is bridged between the sliding contact pipes 50a and 50b via an upper joint 51a, and an upper joint is interposed between the sliding contact pipes 50c and 50d and between the support columns 48c and 48d. Upper and short pipes 52b and 52c are bridged via 51b.

  The base 34 further includes a second horizontal reinforcing pipe 54a bridged to the support columns 48a and 48d, and a second horizontal reinforcing pipe 54b bridged to the support columns 48b and 48c. Above the second lateral reinforcement pipes 54a and 54b, third lateral reinforcement pipes 56a and 56b are provided so as to be parallel to the second lateral reinforcement pipes 54a and 54b.

  The second horizontal reinforcing pipes 54a and 54b are positioned vertically above the first horizontal reinforcing pipes 44a and 44b, and are positioned vertically lower than the third horizontal reinforcing pipes 56a and 56b. The lower long pipe 42a and the second horizontal reinforcing pipe 54a are passed through the two-hole bracket 58a, and the lower long pipe 42b and the second horizontal reinforcing pipe 54b are passed through the two-hole bracket 58b.

  A support pipe 60 is coupled to the support columns 48a and 48b at a position vertically above the third lateral reinforcing pipes 56a and 56b. Furthermore, L-shaped pipe units 66a and 66b having a substantially L shape are connected to the support pipe 60 and the upper short pipe 52a.

  As shown in FIG. 4, one movable base 36 includes four lower pipes 82a to 82d, upper pipes 84a to 84d, lower pipes 82a to 82d, and upper pipes 84a that are substantially equal in length. To 84d are connected to each other. The lower pipe 82a and the upper pipe 84a are parallel to the lower long pipe 42a of the base 34, and the lower pipe 82b and the upper pipe 84b are parallel to the lower short pipe 40a of the base 34. The lower pipe 82c and the upper pipe 84c are parallel to the lower long pipe 42b of the base 34, and the lower pipe 82d and the upper pipe 84d are parallel to the lower short pipe 40b of the base 34.

  Two reinforcing pipes 88a and 88b are bridged over the lower pipes 82b and 82d. On the other hand, an upper fixing pipe 98 is bridged between the upper pipes 84a and 84c (see FIG. 4). Further, two roller conveyors 100a and 100b are provided so as to be bridged on the upper pipes 84a and 84c. The upper fixing pipe 98 is located between the roller conveyors 100a and 100b.

  In the above configuration, the lower joint 101 connecting the lower pipes 82a to 82d and the upper joint 102 connecting the upper pipes 84a to 84d hold the sliding pipe 104 provided with the sliding hole 103, respectively. ing. The sliding pipe 104 is preferably made of resin. Specific examples thereof include various engineering plastics such as polyamide.

  As shown in FIG. 2, any one of the sliding contact pipes 50 a to 50 d is slidably passed through the sliding hole 103 of each sliding pipe 104. That is, the sliding pipe 104 is a first engaging portion that engages with the sliding contact pipes 50a to 50d, and the sliding contact pipes 50a to 50d are the first engagement parts with which the sliding pipe 104 is slidably engaged. 2 engaging portions.

  The inner peripheral wall of the sliding hole 103 of the sliding pipe 104 and the outer peripheral wall of the sliding contact pipes 50a to 50d are in sliding contact with each other. That is, the inner peripheral wall of the sliding hole 103 and the outer peripheral wall of the sliding contact pipes 50a to 50d are sliding contact surfaces. Here, when the sliding pipe 104 is made of resin, the inner peripheral wall of the sliding hole 103 which is the sliding contact surface of the sliding pipe 104 is also made of resin. Accordingly, a resin member is disposed on the inner peripheral wall of the sliding hole 103 that is in sliding contact with the outer peripheral walls of the sliding contact pipes 50a to 50d.

Here, a plurality of holding holes are formed through the sliding pipes 50a to 50d along the radial direction. FIG. 5 shows a case where two holding holes 76a and 76b are formed. The holding holes 76a and 76b are formed in all the sliding contact pipes 50a to 50d, and all the holding holes 76a (first hole group) are located at the same height.

Further, the holding hole 76b is formed vertically above the holding hole 76a in each of the sliding contact pipes 50a to 50d. Of course, all the holding holes 76b (second hole group) are located at the same height.

  Bolts 78 are selectively inserted into the holding holes 76a or 76b. FIG. 5 illustrates a case where the bolt 78 is inserted into the holding hole 76b. The barrel portion of the bolt 78 is exposed from the holding hole 76b (or the holding hole 76a), and the nut 80 is screwed into the screw portion of the exposed barrel portion. Thereby, the bolt 78 is prevented from coming off from the holding hole 76b (or the holding hole 76a). The bolts 78 are most preferably inserted into all the holding holes 76b (or the holding holes 76a).

  As will be described later, when the movable table 36 is lowered, the sliding pipe 104 comes into contact with the bolt 78. By this contact, the sliding pipe 104 is dammed, and the movable table 36 is stopped accordingly. That is, the bolt 78 / nut 80 functions as a stopper member, and the bolt 78 / nut 80 and the holding holes 76a, 76b constitute a stop mechanism.

  Two air dampers 106 a and 106 b (elastic means) are bridged between the lower fixing pipe 46 and the upper fixing pipe 98. Each rod of the air dampers 106a and 106b is retracted (lowered in this case) only when a predetermined load is applied.

  The workpiece transfer system 10 according to the present embodiment is basically configured to include the transfer carriage 14 configured as described above. The relationship with the operation of the carriage 14 will also be described.

  First, the transfer carriage 16 and the transfer carriage 14 are transported to the vicinity of the discharge conveyor 24 in order to transfer the container 12 as a workpiece from the discharge conveyor 24 (see FIG. 1) to the transfer carriage 16. Since both the transport carriage 16 and the transfer carriage 14 are provided with wheels (wheels 28a to 28d, wheels 33a to 33d), this transportation is easy.

  Between the first track member 26a and the second track member 26b constituting the first guide rail 18, two of the four wheels 28a to 28d provided on the transfer carriage 14, that is, the lower short pipe A wheel 28a provided at the intersection of 40a and the lower long pipe 42a and a wheel 28d provided at the intersection of the lower long pipe 42a and the lower short pipe 40b are inserted. At this time, since the entrance of the first guide rail 18 is expanded, the two wheels 28a and 28d can be easily inserted between the first track member 26a and the second track member 26b.

  At this time, the container 12 is not placed on the transfer carriage 14. Therefore, the rods of the air dampers 106a and 106b extend and are located at the forward end, and therefore the movable base 36 is located at the top dead center.

  Similarly to the above, between the third track member 32a and the fourth track member 32b constituting the second guide rail 20, the wheels 33a and 33d among the four wheels 33a to 33d provided in the transport carriage 16 are arranged. Two are inserted. Since the entrance of the second guide rail 20 is expanded, the two wheels 33a and 33d can be easily inserted between the third track member 32a and the fourth track member 32b.

  For example, when the height difference (step) between the transporting carriage 16 and the delivery conveyor 24 is relatively small, the lowering amount of the movable carriage 36 may be reduced in the transfer carriage 14. Accordingly, as shown in FIG. 5, the operator inserts the bolt 78 into the holding hole 76b formed at a high position in the holding holes 76a and 76b, and then the threaded portion of the body portion exposed from the holding hole 76b. Then, the nut 80 is screwed.

  Next, as simply shown in FIGS. 6A and 6B, the container 12 delivered to the delivery conveyor 24 is transferred to the roller conveyors 100 a and 100 b constituting the transfer carriage 14. At this time, since the needle rollers constituting the roller conveyors 100 a and 100 b rotate, it is easy to transfer the container 12 to the transfer carriage 14. Further, since the wheels 28a and 28d are sandwiched between the first track member 26a and the second track member 26b, the transfer carriage 14 is prevented from moving in an unexpected direction.

  When the container 12 is placed on the roller conveyors 100a and 100b, the load of the container 12 is applied to the air dampers 106a and 106b disposed below the movable table 36. By applying this load, each rod of the air dampers 106a and 106b moves backward (lowers). Therefore, as shown by the solid line in FIG. 6C, the movable table 36 is lowered. Since the air dampers 106a and 106b cushion the lowering of the movable table 36, the movable table 36 descends relatively slowly.

  When the movable base 36 is lowered, the inner peripheral wall of the sliding hole 103 of the sliding pipe 104 and the outer peripheral wall of the sliding contact pipes 50a to 50d are in sliding contact with each other. In the present embodiment, the sliding contact pipes 50a to 50d are made of stainless steel, and the sliding pipe 104 is made of an engineering plastic such as polyamide. That is, one of the sliding surfaces is a metal, and the other is an engineering plastic having a small friction coefficient and excellent wear resistance. For this reason, wear powder is less likely to be generated, so that the smooth sliding (movement) of the movable table 36 due to the wear powder biting in the sliding hole 103 is avoided.

  When the movable base 36 is lowered, the lower end of the sliding pipe 104 reaches the position where the bolt 78 and the nut 80 are held (the height position of the holding hole 76b) and comes into contact with the bolt 78 and the nut 80. This prevents further sliding of the sliding pipe 104.

  That is, the sliding pipe 104 is dammed, and the movable base 36 is stopped and fixed at a height position corresponding to the height position of the holding hole 76b. By holding the bolts 78 and nuts 80 in all of the holding holes 76b formed in each of the sliding contact pipes 50a to 50d, it becomes easy to make the stopped movable base 36 in a horizontally parallel posture. .

  The stop position of the movable stand 36 is a height at which the roller conveyors 100a and 100b and the placement portion of the transport carriage 16 substantially coincide. Therefore, when the operator slides the container 12 on the roller conveyors 100a and 100b, the container 12 can be easily transferred from the transfer carriage 14 to the transfer carriage 16 as shown in FIG. 6C. . For this reason, one person is enough, and even a woman can easily perform the work.

  As described above, the wheels 28a and 28d of the transfer carriage 14 are held between the first track member 26a and the second track member 26b, and the wheels 33a and 33d of the transfer carriage 16 are set to the third track member 32a and the second track member 26a. It is sandwiched between the four track members 32b. For this reason, when the container 12 is transferred from the transfer carriage 14 to the transfer carriage 16, the transfer carriage 14 and the transfer carriage 16 are prevented from moving in an unexpected direction.

  In this manner, the roller conveyors 100a and 100b of the transfer carriage 14 are inclined with respect to the horizontal direction until the container 12 is transferred from the delivery conveyor 24 to the transfer carriage 16 via the transfer carriage 14. Never do. Therefore, it is avoided that the container 12 sliding on the roller conveyors 100a and 100b is given momentum due to gravity. For this reason, the container 12 can be easily transferred onto the transport carriage 16. In other words, the concern that the container 12 falls beyond the transport carriage 16 is wiped out.

  Moreover, even if it is a case where the container 12 is laminated | stacked two or more, the concern which collapses is wiped off. This is because the roller conveyors 100a and 100b of the transfer carriage 14 are not inclined with respect to the horizontal direction as described above.

  When the container 12 is transferred to the transport carriage 16, the container 12 is removed from the roller conveyors 100a and 100b, so that the load acting on the air dampers 106a and 106b is removed. Accordingly, as shown in FIG. 6D, the rods of the air dampers 106a and 106b move forward (rise), and the movable table 36 rises following this. When the rod is positioned at the forward end, the ascent of the movable table 36 is finished. That is, it returns to the original height.

  If the sliding pipe 104 is damaged as a result of the above operation, the sliding pipe 104 may be replaced with a new one. The sliding pipe 104 is a commercially available product such as a resin, and is inexpensive and can be easily replaced.

  When it is possible to place a plurality of containers 12 on the carriage 16, the above operation may be repeated.

  As described above, in the present embodiment, without using a power source such as electric power, the container 12 is transferred to the roller conveyors 100a and 100b of the transfer carriage 14, the movable table 36 is lowered, and the movable is lowered. It is possible to transfer the container 12 from the platform 36 to the transport cart 16 and raise the movable platform 36. For this reason, power saving can be achieved.

  Moreover, the transfer carriage 14 can be configured by appropriately using pipes, joints, wheels 28a to 28d, and commercially available products as described above. For this reason, capital investment is low.

  In combination with the above, the cost required for transfer can be sufficiently reduced.

  After the predetermined amount of the container 12 is transferred to the transfer carriage 16, the container 12 can be transferred to a predetermined stockyard or the like by moving the transfer carriage 16.

  In the case of transferring contents different from the contents stored in the container 12, for example, another container 110 having different external dimensions, volume, color, etc. (see phantom lines in FIGS. 6A to 6D). Is used to facilitate the distinction of the contents. At this time, as indicated by phantom lines in FIG. 6A, a transfer carriage 112 having a different leg height (that is, a height from the floor 30 to the placement section) is used instead of the transfer carriage 16. It is done.

  The carriage 112 shown in FIG. 6A is at a position where the loading platform is lower than the carriage 16. Therefore, in this case, the lowering amount of the movable table 36 is increased.

  For this purpose, the operator removes the bolt 78 from the holding hole 76b after loosening the nut 80 and replaces it with the holding hole 76a. That is, the bolt 78 is held in the holding hole 76a, and the nut 80 is screwed into the thread portion of the body portion.

  Next, in this state, as simply shown in FIG. 6B, the container 12 delivered to the delivery conveyor 24 is moved to the roller conveyors 100a and 100b. As a result, the load of the container 12 is applied to the air dampers 106a and 106b disposed below the movable base 36, and the rods of the air dampers 106a and 106b are retracted (lowered). Accordingly, the movable base 36 is lowered. Since the air dampers 106a and 106b cushion the lowering of the movable table 36, the movable table 36 descends relatively slowly.

  When the movable base 36 is lowered, the lower end of the sliding pipe 104 reaches the position where the bolt 78 and the nut 80 are held (the height position of the holding hole 76a), and comes into contact with the bolt 78 and the nut 80. This prevents further sliding of the sliding pipe 104.

  That is, the sliding pipe 104 is dammed, and the movable base 36 is stopped and fixed at a height position corresponding to the height position of the holding hole 76a. By holding the bolts 78 and nuts 80 in all of the holding holes 76b formed in each of the sliding contact pipes 50a to 50d, it becomes easy to make the stopped movable base 36 in a horizontally parallel posture. .

  As shown in FIG. 5, the holding hole 76a is positioned below the holding hole 76b in the vertical direction. For this reason, the lowering amount of the movable table 36 is larger than the lowering amount when the movable table 36 is positioned and fixed at the position of the holding hole 76b. That is, the movable stand 36 stops at a position lower than the above.

  And the stop position of the movable stand 36 by the volt | bolt 78 and the nut 80 is the height which the roller conveyors 100a and 100b and the mounting part of the conveyance trolley | bogie 112 substantially correspond, as shown with a virtual line in FIG. 6C. Therefore, when the operator slides the container 12 on the roller conveyors 100a and 100b, the container 12 can be easily transferred from the transfer carriage 14 to the transfer carriage 112.

  When the container 12 is transferred to the transport carriage 112 as described above, the load acting on the air dampers 106a and 106b is removed. Therefore, as indicated by phantom lines in FIG. 6D, the movable base 36 rises following the advancement (rise) of the rods of the air dampers 106a and 106b.

  Finally, when the rod is positioned at the forward end, the ascent of the movable table 36 is finished. That is, it returns to the original height. When a plurality of containers 12 can be placed on the transport carriage 112, the above operation may be repeated.

  Even in this case, it is needless to say that the same effect as described above can be obtained.

  The amount by which the movable table 36 is lowered can be adjusted by increasing or decreasing the number of air dampers. That is, when the number of air dampers is increased, the amount by which the movable base 36 is lowered is reduced. On the other hand, when the number of air dampers is reduced, the amount by which the movable table 36 is lowered increases.

  Alternatively, the stroke amount (expansion / contraction amount) of the rods of the air dampers 106a and 106b may be adjusted. That is, when the stroke amount of the rod is set to be small, the descending amount of the movable base 36 is small. On the other hand, when the stroke amount of the rod is set large, the descending amount of the movable table 36 becomes large.

  Further, the rod may be replaced with an air damper having a different stroke amount (expansion / contraction amount) for a predetermined load. That is, when an air damper having a smaller stroke amount (expansion / contraction amount) with respect to the weight of the containers 12 and 110 than that of the air dampers 106a and 106b is used, the lowering amount of the movable table 36 is reduced. On the contrary, if an air damper having a larger stroke amount (expansion / contraction amount) than the air dampers 106a and 106b is used with respect to the weight of the containers 12 and 110, the amount of lowering of the movable base 36 is increased.

  The increase or decrease or replacement of the air damper may be performed when the movable base 36 is incorporated into the base 34. Since the base 34 and the movable base 36 are composed of a frame body in which pipes are connected, the operation of increasing and decreasing the air damper and the replacement work are easy.

  The present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above embodiment, by forming the two holding holes 76a and 76b, the stop position of the movable base 36 can be selected in two steps, a low position and a high position. By setting the number to three or more, it becomes possible to further select the number of steps of the stop position.

  In addition, the workpiece is not particularly limited to the containers 12 and 110, and may of course be an intermediate body, a molded product, or an assembly itself subjected to forging.

  Furthermore, the work transfer source to the transfer cart 14 is not limited to the delivery conveyor 24, and the work transfer destination from the transfer cart 14 is not limited to the transport cart 16. . For example, the transfer carriage 14 may be used when transferring a workpiece from a transfer carriage having a large height to a dispensing conveyor having a small height.

  A hydraulic cylinder may be used as the elastic means. In this case, the workpiece can be easily moved from the high position to the low position or vice versa by moving the rod of the hydraulic cylinder up and down.

DESCRIPTION OF SYMBOLS 10 ... Work transfer system 12, 110 ... Container 14 ... Transfer cart 16, 112 ... Transfer cart 18, 20 ... Guide rail 22 ... Work station 24 ... Discharge conveyor 26a, 26b, 32a, 32b ... Track member 28a- 28d, 33a to 33d ... wheels 30 ... floor 34 ... base 36 ... movable stands 48a-48d ... support columns 50a-50d ... sliding pipes 76a, 76b ... holding holes 78 ... bolts 80 ... nuts 100a, 100b ... roller conveyors 103 ... Sliding hole 104 ... Sliding pipe 106a, 106b ... Air damper

Claims (7)

A movable body comprising a frame formed by connecting hollow tube members including a plurality of sliding pipes, and is provided with a roller conveyor for lowering and sliding the work when the work is placed. Stand,
A hollow tube member frame formed by connecting, and has a plurality of sliding pipes, each of which slidably engaged with the sliding pipe, the movable table in the horizontal position A base that can be moved up and down;
An elastic means connected to the movable table and the base table to cushion the lowering of the movable table and capable of raising the movable table after the workpiece is removed from the movable table;
A stop mechanism for stopping the descent of the movable table;
A moving means provided on the base for moving the base and the movable base supported by the base;
Including a transfer table having
The stop mechanism includes at least a first hole group including holes provided at a first height position of each of the sliding contact pipes, and a second hole group provided at a second height position. And a stopper member is removably passed through either the hole forming the first hole group or the hole forming the second hole group,
When the movable base is lowered to a predetermined position, the stopper member blocks the sliding pipe, so that the movable base can be stopped in a horizontal posture at a plurality of positions having different heights. ,
The workpiece is transferred to the transfer destination via the transfer table by sliding the workpiece toward the transfer destination by the roller conveyor from the movable table that is lowered by placing the workpiece. A workpiece transfer system characterized by According to claim 1 wherein the work transfer system, and wherein the sliding surface of the sliding contact pipe, or to at least one of the sliding contact surface of the sliding pipe, the resin member is disposed Work transfer system. 3. The workpiece transfer system according to claim 2, wherein the bottom of the base is rectangular with two lower short pipes and two lower long pipes, and four connections between the lower short pipes and the lower long pipes. Support pillars are erected above the locations, and the sliding contact pipes are arranged in parallel to the support pillars,
An upper short pipe is bridged to the sliding contact pipe and the support pillar,
The workpiece transfer system, wherein the sliding pipe is engaged with the sliding contact pipe so as to be positioned below the upper and short pipes.   The workpiece transfer system according to any one of claims 1 to 3, wherein the elastic means includes an air damper, and the amount of the air damper or the amount of expansion / contraction of the rod is set to adjust the descending amount of the movable table. This is a workpiece transfer system. In work transfer system according to any one of claims 1-4, work transfer system characterized in that said moving means is a wheel. The work transfer system according to any one of claims 1 to 5 , further comprising guide means provided on a floor of a station that performs an operation of placing the work on the movable table, and guiding the moving means. A workpiece transfer system comprising: 7. The workpiece transfer system according to claim 6 , wherein the guide means is detachably installed on the floor.

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