JP4424487B2 - Conveyor using trolley - Google Patents

Description

  The present invention relates to a transport apparatus in which a floor having a height substantially equal to the upper surface of a side parallel to the travel direction of the transport carriage is provided on the side of the travel path of the transport carriage traveling on a fixed travel path. is there.

The carriage using the carriage as described above is used in, for example, an automobile assembly line or the like as known from Patent Document 1 and the like. An operator moves back and forth between the carriages, and an operator who has moved onto the carrier carriage performs parts mounting work on the automobile body mounted on the carriage.
JP 2002-240706 A

  Thus, in this type of carriage-use transfer device, tools and small parts that are accidentally dropped by the operator are prevented from falling below the floor through the gap between the floor beside the travel path and the carriage. However, it is necessary to prevent a worker who goes back and forth between the floor and the transport carriage from getting caught in the gap and falling down. It is necessary to substantially narrow the gap, and it is required as an absolute condition to improve the width dimensional accuracy of the transport carriage, the guide rail laying accuracy that guides the transport cart, and the floor laying accuracy beside the travel route, and in reality It has been difficult to narrow the gap as required at the site.

An object of the present invention is to provide a carriage using a carriage that can solve the above-described conventional problems, and the means thereof is shown with reference numerals of embodiments described later. certain traveling path on the traveling route side of the conveying carriage 1 travels, the floor 22 of substantially the same height as the upper surface of the parallel sides and the traveling direction of the conveying carriage 1 is provided, et al is, conveyance of the floor 22 A cart-use transport device in which a band plate-like cover 24 that protrudes toward the travel route side of the transport cart 1 and overlaps the top surface of the transport cart 1 is attached to the top surface of the side adjacent to the cart travel route. The floor sheet 21 made of non-steel material is stretched on the upper surface of the transport carriage 1 leaving the upper surface of the side where the strip cover 24 overlaps, and the belt cover 24 of the transport carriage 1 is stretched. The side upper surface that overlaps the steel frame (front-rear frame 1 a, it has a top surface exposed as construction of 17b).

In carrying out the present invention having the above configuration, specifically, as described in claim 2, the upper surface of the strip plate cover 24 is composed of a soft slip prevention sheet 25, and at least the strip plate cover 24 is provided. The lower surface of the region that overlaps the upper surface of the side edge of the transport carriage 1 can be composed of a backing sheet 26 that is harder and smoother than the anti-slip sheet 25 .

  According to the carriage-use conveyance device according to the present invention having the above-described configuration, even if a gap between the conveyance carriage and the floor beside the traveling path is large, the gap is securely closed by the floor-side band plate cover. The tools and small parts that are accidentally dropped by the worker fall under the floor from the gap, or the worker who goes back and forth between the floor and the transport cart will fall over with the leg caught in the gap. Can be reliably prevented. In addition, as described above, it is not necessary to forcibly narrow the gap between the transport carriage and the floor beside the travel route, so the lateral dimension accuracy of the transport carriage and the laying accuracy of the guide rail that guides the transport carriage are eliminated. The tolerance for the floor laying accuracy on the side of the travel route is increased, and the installation of the transfer device is facilitated.

Furthermore , according to the configuration of the present invention , the walking area of the worker on the transport carriage is stretched with a non-slip floor sheet made of non-steel material that is hard to slip and the floor side band plate cover is Rather than being brought into sliding contact with the floor sheet, it can be brought into sliding contact with the steel frame on the side of the transportation carriage, so that the floor sheet on the transportation carriage is worn by sliding contact with the belt-like cover. Can be suppressed.

Moreover, according to the structure of Claim 2 , even if the operator who transfers between a floor and a conveyance trolley steps on a strip plate cover, the upper surface is a soft slip prevention sheet | seat which is hard to slip. It is safe with no fear of slipping and falling. In addition, since the portion of the strip cover that overlaps the side of the transport carriage is a hard, smooth surface backing sheet that slips, the strip cover is turned up by friction with the side of the transport cart. In addition to being prevented from rising, wear due to the friction can be suppressed, and the service life can be extended.

  A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a planar rectangular transport cart that is long in the traveling direction, and includes a pair of left and right front and rear wheel units 2a to 2d. And a transportable object support base 3 that can be moved up and down. Each of the wheel units 2a to 2d has a wheel 5 that rolls on a pair of left and right guide rails 4a and 4b laid along the travel route, and two front and rear wheels on one side (left side in the illustrated example). The units 2a and 2c are provided with a steady-state vertical shaft roller 6 that sandwiches the guide rail 4a from both the left and right sides. The carriage 1 is propelled by friction drive means 7 provided at an appropriate place in the travel route. This friction drive means 7 is well known in the art, and abuts against one friction surface 8a of a pair of left and right vertical friction surfaces 8a and 8b formed on the transport carriage 1 so as to be continuous over the entire length. The driving friction wheel 9 includes a motor 10 that rotationally drives the driving friction wheel 9, and a backup roller 11 that contacts the other friction surface 8 b so as to sandwich the carriage 1 between the driving friction wheel 9. .

  Although the friction drive means 7 is illustrated as a means for propelling the transport carriage 1, it is stretched so as to move along a travel route of the transport carriage 1 or a system in which at least one of the wheels 5 is motor-driven. Any other propulsion means may be used, such as a method in which the drive chain and the transport carriage 1 are engaged and the transport cart 1 is propelled by the drive chain. Further, as shown in the figure, the vertical friction surfaces 8a and 8b necessary for the conveyance carriage 1 side when using the friction drive means 7 may be diverted from the left and right sides of the conveyance carriage 1 as they are. You may comprise and comprise a member.

  The transported object support base 3 is supported so as to be vertically movable by a cross link mechanism 12 interposed between the transport object support base 3 and the transport carriage 1 below. The cross link mechanism 12 may have various configurations. The illustrated cross link mechanism 12 includes two sets of left and right cross links 13a and 13b, a push-up operation unit (roller) 14, and a cam driven lift 15. And the cam driven lift 15 is pushed up by a cam rail 16 laid in a section in the travel path of the transport carriage 1 where the transported object support base 3 is lifted. The body 15 pushes up and stands up the two sets of left and right cross links 13a and 13b via the push-up operation unit (roller) 14, and the object support table 3 supported by the two sets of left and right cross links 13a and 13b. Ascent against the gravity rises to the ascending limit position shown by the phantom line in FIG. 1A. In the section where the cam rail 16 is not laid, the transported object support base 3 descends by gravity while lying down on the two sets of left and right cross links 13a and 13b, and is stabilized at the lower limit position shown by the solid line in FIG. 1A.

  In this embodiment, the transportable object support base 3 that can be moved up and down is installed on the transport carriage 1. However, the transported object support base 3 may have any configuration and can be moved up and down. Even when the transported object support base 3 is provided, the configuration of the lifting drive means is not limited to that of the above embodiment.

  As shown in FIG. 2, the transport carriage 1 includes a pair of left and right parallel front and rear frames 17a and 17b constituting the vertical friction surfaces 8a and 8b, and a left and right direction connecting between both ends of the front and rear frames 17a and 17b. A frame 18, a reinforcing intermediate frame 19 installed inside a rectangular frame formed by the frames 17a-18, and an upper surface and a surface of each frame 17a-19 in each rectangular space defined by the frames 17a-19 It comprises a floor plate 20 fitted and supported in one piece, and a non-steel floor sheet 21 laid on the upper surface of the carriage 1 constituted by the frames 17 a to 19 and the floor plate 20. The floor sheet 21 is made of, for example, a flexible synthetic resin, and the size thereof is such that the periphery of the floor sheet 21 slightly covers the inner sides of the frames 17a to 18 forming the surrounding rectangular frame. Is set to Accordingly, the upper surfaces of the front and rear frames 17a and 17b are exposed in a strip shape, leaving a small area on the inner side. In addition, a square steel pipe is used for each of the frames 17 a to 19, and a plywood is used for the floor plate 20.

  As shown in FIG. 1 and FIG. 2, on the side of the travel route of the transport carriage 1, the upper surface of the transport carriage 1 (the upper surface of the floor sheet 21) composed of the frames 17 a to 19 and the floor board 20. And a work floor 22 of almost the same level as that is constructed. In addition, although this work floor 22 can be attached only to the specific area in the travel route of the conveyance trolley 1, and the example constructed | assembled on the both right and left sides of the travel route of the conveyance trolley 1 is shown, it shows only on one side. It can also be erected.

  The work floor 22 is constructed so as to form an appropriate gap 23 between the front and rear frames 17a and 17b of the transport carriage 1, and the upper side surface of the work floor 22 adjacent to the transport path of the transport carriage In addition, a band plate-like cover 24 that protrudes toward the travel route side of the transport carriage 1 and closes the gap 23 is attached. As shown in FIG. 3, the band plate cover 24 includes a soft anti-slip sheet (for example, rubber sheet) 25 and a backing sheet (for example, ultrahigh molecular weight polyethylene) that is harder and smoother than the anti-slip sheet 25. Sheet, product name “Newlite”, “Solyjour”, etc.) 26, and a carriage for carrying the work floor 22 in a region that is almost half the width with the anti-slip sheet 25 on the upper side. An anti-slip sheet 25 is placed on a belt-like presser plate 27 that is superimposed on the upper surface of the side edge adjacent to the travel path and is placed on the side of the anti-slip sheet 25 on the work floor 22 side and straddling the work floor 22. And is fixed to the work floor 22 by a set screw 28 screwed into the work floor 22. Thus, the belt-like cover 24 protruding from the work floor 22 toward the transporting carriage travel path side closes the gap 23 and also the upper surfaces of the left and right sides of the transporting carriage 1, that is, the front and rear direction frames 17a and 17b. The surface of the lower backing sheet 26 overlaps with the upper surface of the square steel pipe exposed outside the floor sheet 21.

  According to the above configuration, the gap 23 between the traveling carriage 1 that travels and the work floor 22 on the side of the travel path is always closed by the strip cover 24. In other words, even if the gap 23 is slightly widened, various problems as in the case where the gap 23 is open do not occur.

Fig. A is a partially longitudinal schematic side view for explaining the configuration of the transport carriage, and Fig. B is a partially cutaway schematic plan view for explaining the configuration of the transport carriage and its periphery. It is a partially cutaway top view which shows the detail of the conveyance trolley | bogie and its periphery. It is a vertical front view which shows the detail of the principal part of this invention embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer trolleys 17a and 17b Front-rear direction frame 20 Floor board 21 Floor sheet 22 Work floor 23 Gap 24 Strip plate cover 25 Soft slip prevention sheet 26 Hard and smooth surface backing sheet 27 Band presser plate 28 Set screw

Claims (2)

Certain traveling path on the traveling route side of the conveying carriage that travels floors substantially the same height as the upper surface of the running direction and parallel to the sides of the conveying carriage is provided et al is, conveying carriage traveling route of the floor In the transport device using a carriage , on the side upper surface adjacent to the carriage, a band plate-like cover that protrudes toward the traveling path side of the transport carriage and overlaps the upper surface of the side carriage is attached .
On the upper surface of the transport carriage, a floor sheet made of a non-steel material is stretched leaving a side upper surface on which the strip cover is overlapped, and the side upper surface on which the strip cover of the transport cart is overlapped, A carriage-use transfer device with the upper surface of the steel frame exposed as it is . The upper surface of the band plate cover is composed of a soft anti-slip sheet, and at least the lower surface of the area overlapping the upper surface of the side of the transport carriage is harder and smoother than the anti-slip sheet. The trolley-use conveyance device according to claim 1, wherein the trolley is used as a backing sheet .