JP2009166589A - Friction drive transport device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate lowering of a loading platform of a transport device that frictionally drives the loading platform. <P>SOLUTION: The friction drive transport device is provided with a vertically movable arm 35 pivoted on a base 33 in a vertically oscillating manner, a motor 32 supported by the vertically movable arm 35, a driving roller 31 driven by this motor 32, a detection mechanism 43 for detecting that a spring 39 and a driving roller 31 for energizing the vertically movable arm 35 upward are pressed down by a bar 4 for frictional drive at a side of the loading platform. This detection mechanism 43 consists of a seesaw motion arm 46 of which middle position is pivoted on the base 33 in parallel with the vertically movable arm 35 in the vertically oscillating manner, an interlocking means (a driving pin 47 and a one-end-two-way part 46a of the seesaw motion arm 46) for interlocking vertical motion of an end of the seesaw motion arm 46 and a middle part of the vertically movable arm 35 and a detector (a limit switch 49) for detecting upward movement of another end of the seesaw motion arm 46 in an opposite direction of the driving roller 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a friction drive conveying device that causes a load roller to travel by a drive roller that presses against a lower surface of a friction drive bar provided on the load carrier.

As a friction drive transport device, a friction driving bar is attached to a loading platform that supports a workpiece in parallel with the conveyance direction, and a driving roller that presses against the lower surface of the friction driving bar is provided on the traveling path side of the loading platform. A friction drive conveying apparatus in which the friction drive means provided is arranged at an appropriate interval is known from, for example, Japanese Patent Application Laid-Open No. H10-228707. In this type of transport device, the load path is as close as possible to the floor surface, and the lower the top surface of the load carrier when viewed from the floor surface, the more efficient the work loading and unloading of the workpiece is. Although it is preferable in terms of surface, a driving roller of friction driving means is disposed below the loading platform. Therefore, it is ideal if the space height between the loading platform and the floor surface can be suppressed to a level slightly larger than the diameter of the drive roller. However, this is not the case with the conventional technique described in Patent Document 1 or the like. It was impossible to configure.
JP 2000-318604 A

  That is, in this type of friction drive conveyance device, each drive roller is controlled by the biasing force of the spring in order to control the rotation / stop of each drive roller of the friction drive means arranged at appropriate intervals in the traveling path direction. It is necessary to detect the presence of the loading platform at each driving roller position by detecting whether it is in the upper movement limit position or being pushed down by the friction drive bar on the loading platform side and in the lowering limit position, In the conventional configuration, a detector for detecting the vertical movement of the vertical movement arm is disposed on the upper side of the vertical movement arm that supports the driving roller (motor) at the free end, and the lower side of the vertical movement arm is disposed on the lower side. Since the spring for urging the vertical movement arm upward is provided, the installation space of the detector becomes very narrow and difficult to implement, and the height of the friction drive means as a whole increases. There is a problem It was.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a friction drive transport apparatus that can solve the above-mentioned conventional problems, and the friction drive transport apparatus according to claim 1 refers to an embodiment described later. When a reference numeral is attached, a friction driving bar 4 is attached to the loading platform 1 that supports the workpiece W in parallel with the conveying direction, and a lower side of the friction driving bar 4 is provided on the traveling path side of the loading platform 1. In a friction drive conveying apparatus in which friction drive means 25 having a drive roller 31 in pressure contact with the side surface 4a are arranged at appropriate intervals, the friction drive means 25 moves up and down within a certain range on the base 33. A vertically movable arm 35 supported by the shaft, a horizontal lateral motor 32 supported by the vertically movable arm 35, a driving roller 31 attached to an output shaft of the motor 32, and a lateral side of the vertically movable arm 35. The spring 39 disposed on the base 33 and urging the vertical movement arm 35 upward, and the drive roller 31 being pushed down by the lower side surface 4a of the friction drive bar 4 on the loading platform 1 side. The detection mechanism 43 includes a detection mechanism 43, and the detection mechanism 43 has an intermediate position on the base 33 in parallel with the vertical movement arm 35 on the side opposite to the side where the spring 39 is located with respect to the vertical movement arm 35. A seesaw motion arm 46 pivotally supported in a vertically swingable manner, and linkage means for interlocking the vertical motion of one end of the seesaw motion arm 46 and the intermediate portion of the vertical motion arm 35 (the drive pin 47 and one end of the seesaw motion arm 46). A detector (limit switch 4) that detects the upward movement of the other end of the seesaw movement arm 46 that moves up and down in the opposite direction to the drive roller 31; And it has a configuration that consists of).

  When the present invention having the above-described configuration is implemented, specifically, as described in claim 2, the motor 32 and the driving roller 31 are positioned laterally outward from the base 33, and the loading platform 1 The driving roller 31 pushed down by the lower side surface 4 a of the friction drive bar 4 on the side can be lowered to a level overlapping the base 33.

  According to a third aspect of the present invention, the vertical movement arm 35 includes a pair of left and right arm plates 37a that are pivotally supported by a horizontal support shaft 36, and an extension of the arm plate 37a that is fixed to the tip of the arm plate 37a. The motor support plate 37b which is bent in an L shape in the direction and the drive roller 31 on the motor 32 side attached to the motor support plate 37b is located at the extended position of the pair of left and right arm plates 37a. It can be constituted as follows. In this case, as described in claim 4, an L-shaped plate portion 40 into which a lower end horizontal plate portion 40 a enters the lower side of the base 33 from the lower side of the motor support plate 37 b is connected to the upper and lower sides. The vertical movement range of the moving arm 35 can be configured to be regulated within a space range between the lower end horizontal plate portion 40a of the L-shaped plate portion 40 and the base 33 positioned on the upper side thereof.

  According to a fifth aspect of the present invention, the spring receiving plate 38 has one end fixed to the upper side of the intermediate portion of the vertical movement arm 35 and extends to the opposite side of the detection mechanism 43 where the seesaw motion arm 46 is located. A compression coil spring 39 can be interposed between the spring receiving plate 38 and the base 33 below the spring receiving plate 38.

  Further, according to a sixth aspect of the present invention, the linking means between the vertical movement arm 35 and the seesaw movement arm 46 sandwiches the drive pin 47 between the drive pin 47 projecting from the side surface of the vertical movement arm 35. The seesaw motion arm 46 can be constituted by one end bifurcated portion 46a.

  According to the friction drive conveyance device according to the present invention having the above-described configuration, the spring that urges the vertical movement arm upward with respect to the vertical movement arm that supports the motor with the drive roller, and the seesaw movement arm of the detection means are based on. Because the vertical position of the vertical movement arm is detected via a seesaw movement arm that is arranged in the left and right direction on the table and is parallel to the vertical movement arm and the detected part moves in the opposite direction to the vertical movement arm. It is easy to construct the entire spring and detection means for urging the vertical movement arm upward, and the entire friction drive means within the vertical movement range of the drive roller. A carrier having a low floor structure can be realized by sufficiently bringing the cargo bed traveling on the floor close to the floor surface.

  According to the configuration of claim 2, the drive roller pushed down by the friction drive bar on the loading platform side is provided with the height adjustment space required when the base is installed on the floor surface. Friction driving means can be installed so as to be sufficiently close to the surface, and a transport apparatus having a much lower floor structure can be realized.

  Further, according to the configuration of the third aspect, the vertical movement arm extending linearly to the motor position is used, the motor is attached to one side of the vertical movement arm, and the driving roller is pivotally supported on the opposite side. Compared to the structure, the part that supports the motor of the vertical movement arm is composed of a plate material with a sufficient vertical width, and the base of the vertical movement arm that is located on the same straight line as the drive roller is a pair of left and right arm plates It can be constructed ruggedly, and the downward push-down force acting on the drive roller eliminates the torsional force acting on the vertical movement arm, making it suitable for friction loading of the loading platform that loads and conveys heavy loads. An apparatus can be provided. Furthermore, according to the structure of Claim 4, the means for restrict | limiting the upward movement of the vertically-moving arm on a base can be comprised using the slight space under a base.

  Moreover, according to the structure of Claim 5, the compression coil spring which urges | biases an up-and-down moving arm upward can be completely stored in the space between the upper side of a up-and-down moving arm and a base, In addition to helping to reduce the overall height of the friction drive means, by combining the structure according to claim 5 with the structure according to claim 3, a pair of left and right arm plates constituting a vertically moving arm; The motor support plate can be firmly integrated with the spring support plate, and a more sturdy vertical movement arm can be configured.

  Further, according to the configuration of the sixth aspect, the means for linking the vertical movement arm and the seesaw motion arm of the detection means can be implemented with a very simple configuration in which only one drive pin is added as a part. Can help reduce costs.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. First, the structure of the loading platform used in the transport device of the present invention and the travel route side will be described. In FIGS. A sliding platform for supporting and transporting a workpiece (automobile body) W, a pair of left and right long rod-like sliding members 2a and 2b parallel to the length direction of the supporting workpiece W, and front and rear parallel to the width direction of the supporting workpiece W A pair of short rod-shaped sliding members 3a, 3b and a single vertical member that is disposed at a central position between the long rod-shaped sliding members 2a, 2b parallel to the length direction of the supporting workpiece W and is longer than the entire length of the supporting workpiece W. One feed friction that is longer than the width of the supporting work W and is disposed at the center position between the feeding friction driving bar 4 and the rod-like sliding members 3a, 3b that are parallel to the width direction of the supporting work W and are short. With drive bar 5 That.

  More specifically, the distance between the pair of left and right long rod-shaped sliding members 2a, 2b of the sliding bed 1 is slightly narrower than the width of the work W to be supported, and the length of the pair of left and right long rod-shaped sliding members 2a, 2b is supported. A little shorter than the total length of the workpiece W. Accordingly, the distance between the pair of front and rear short rod-shaped sliding members 3a and 3b is wider than the distance between the pair of left and right long rod-shaped sliding members 2a and 2b. The length of the pair of short rod-shaped sliding members 3a, 3b is equal to the distance between the pair of left and right long rod-shaped sliding members 2a, 2b. The pair of left and right long rod-like sliding members 2a and 2b and the pair of front and rear short rod-like sliding members 3a and 3b are each formed of a single square pipe member that is seamless between both ends. Accordingly, since the longitudinal feed friction drive bar 4 is divided at a position where it intersects with the pair of front and rear short rod-shaped sliding members 3a and 3b, the central bar-shaped member 6a between the pair of front and rear short rod-shaped sliding members 3a and 3b, It is comprised from the front-and-rear pair of short rod-shaped sliding members 3a and 3b and both-end rod-shaped members 6b and 6c extending outward in the front-rear direction. Further, since the transverse feed friction drive bar 5 is divided at a position where it intersects with the pair of left and right long rod-like sliding members 2a and 2b and the longitudinal feed friction drive bar 4, the longitudinal feed friction drive bar 4 and Two central rod-like members 7a, 7b between the pair of left and right long rod-like sliding members 2a, 2b, and both-end rod-like members 7c, 7d extending left and right outward from the pair of left and right long rod-like sliding members 2a, 2b; It is composed of

  Further, the front and rear outer corners of the T-shaped intersection of the pair of left and right long rod-shaped sliding members 2a and 2b and the pair of front and rear short rod-shaped sliding members 3a and 3b, and the front and rear from the pair of front and rear short rod-shaped sliding members 3a and 3b Between the longitudinal front and rear ends of the longitudinal feed friction drive bar 4 extending in both directions (positions near the ends of the rod members 6b and 6c at both ends), the diagonal connecting members 8a, 8b and 9a 9b is installed. All of the members 2a to 8b constituting the sliding bed 1 have a square pipe material having the same cross section, that is, a rectangular pipe material having a rectangular cross section whose height is twice as wide as shown in FIGS. The sliding bed 1 is configured by welding each member at a butting position. In addition, on the upper surface side of the sliding bed 1, at the abutting position of a pair of left and right long rod-shaped sliding members 2a and 2b, a pair of front and rear short rod-shaped sliding members 3a and 3b, and diagonal connecting members 8a and 8b and 9a and 9b. The pad 10 having a shape that covers these three members at the same time is welded and reinforced, but the pad 10 for reinforcement should be added to the abutting portion between other members as necessary. Can do.

  The sliding platform 1 having the above configuration is provided with a work support attachment 11 necessary on the upper surface side according to the type of the work W to be loaded. In addition, a floor plate that covers the entire surface or a part of the slide carrier 1 can be laid on the upper surface side of the sliding platform 1.

  One side of the pair of left and right long rod-like sliding members 2a and 2b and one side of the pair of front and rear short rod-like sliding members 3a and 3b in the sliding platform 1 having the above-described configuration will be described later. It is supported and guided by a roller rail with a hook on the traveling path side, and as shown in FIG. 1C and FIGS. It is configured to allow relative movement in the vertical direction. More specifically, as shown in parts A to C of FIG. 3C, a pair of front and rear short rod-shaped sliding members 3a and 3b crossing the long rod-shaped sliding member 2a, diagonal connecting members 8a and 9a, and lateral feed friction The drive bar 5 is formed with concave groove portions 12a to 12f that allow the flange portion of the roller with both flanges to pass along the long rod-shaped sliding member 2a at a location adjacent to the long rod-shaped sliding member 2a. As shown in A part, D part, and E part of FIG. 3C, a pair of left and right long rod-like sliding members 2a, 2b crossing the short rod-like sliding member 3a, diagonal connecting members 8a, 8b, and longitudinal feed friction drive The bar 4 is formed with concave groove portions 13a to 13d that allow the flange portion of the roller with both flanges to pass along the short rod-shaped sliding member 3a at a position adjacent to the short rod-shaped sliding member 3a.

  As shown in FIG. 3 to FIG. 6, each of the concave groove portions 12 a to 13 d is formed by cutting out about half the height of the square pipe material of the member in which the concave groove portions 12 a to 13 d are formed into a square shape from the lower surface side. The cover plate 14 is fixed by welding along the notch so as to close the opening formed by the notch. The concave groove portions 13a and 13b provided in the pair of left and right long rod-like sliding members 2a and 2b adjacent to both ends of the short rod-like sliding member 3a are essentially rollers that move along both side surfaces of the short rod-like sliding member 3a. Therefore, it is not necessary for the extended region of the short rod-shaped sliding member 3a, and can be provided separately on the left and right sides of the extended region of the short rod-shaped sliding member 3a. However, in the illustrated embodiment, in order to simplify the structure, one wide concave groove portion 13a, 13b is formed in a pair of left and right long rod-shaped sliding members 2a, 2b adjacent to both ends of the short rod-shaped sliding member 3a. is doing.

  In addition, projecting pieces 15a and 15b and 16a and 16b project from both ends of the longitudinal feed friction drive bar 4 and both ends of the lateral feed friction drive bar 5, respectively. As shown in FIGS. 7 to 9, these protruding pieces 15 a to 16 b are horizontally prismatic members whose width and height are about half of the width and height of the friction drive bars 4 and 5. One end in the length direction is brought to the end surface of each friction drive bar 4, 5, and is shifted to either the left or right side and is flush with the lower side surfaces 4 a, 5 a of the friction drive bar 4, 5. The cover plate 17 closes the openings of the end faces of the friction drive bars 4 and 5 remaining around the projecting pieces 15a to 16b. Thus, the protruding pieces 15a and 15b at both ends of the longitudinal feed friction drive bar 4 are shifted to the left and right in the opposite direction when viewed from the longitudinal feed friction drive bar 4, and the transverse feed friction drive bar The projecting pieces 16a and 16b at both ends of the belt 5 are shifted to the left and right in opposite directions as viewed from the transverse feed friction drive bar 5. Accordingly, when the two sliding platforms 1 are adjacent to each other so that the end portions of the longitudinal feeding friction drive bar 4 or the lateral feeding friction drive bar 5 face each other, the longitudinal feeding friction of the front sliding platform 1 is reached. The projecting piece 15b or 16b at the rear end of the drive bar 4 or the transverse feed friction drive bar 5 and the front end of the longitudinal feed friction drive bar 4 or the transverse feed friction drive bar 5 of the rear sliding platform 1 are shown. The protruding pieces 15a or 16a are arranged in parallel, and the ends of the protruding pieces 15a to 16b are the end portions of the longitudinal feeding friction driving bar 4 or the lateral feeding friction driving bar 5 of the mating sliding platform 1 (the cover plate 17). ).

  Next, the configuration on the traveling route side of the sliding platform 1 having the above configuration will be described. FIGS. 10 to 13 show the configuration of the longitudinal feeding traveling route 20 of the sliding platform 1, and this longitudinal feeding traveling route 20 includes rails. Units 21 are arranged in series at appropriate intervals in the traveling path direction. Each rail unit 21 has the same structure, and includes a roller rail 22 with a flange and a roller rail 23 without a flange, connecting members 24a and 24b for connecting and integrating positions near both ends of both roller rails 22 and 23, and one It is comprised from the friction drive means 25 attached to this connection member 24a.

  The roller rail 22 with a hook supports the rod-shaped sliding member 2a on the side where the concave groove portions 12a to 12f are provided in the pair of left and right long rod-shaped sliding members 2a and 2b of the sliding bed 1 so as to be movable in the length direction. The rod-shaped sliding member 2a fits between the pair of left and right flanges, and the rod-shaped sliding member 2a is always at an interval at which at least two rollers with both rods can support the rod-shaped sliding member 2a. The rail members 27a and 27b using a pair of left and right angle members are pivotally supported by horizontal support shafts, and the total length of the rail members 27a and 27b is the protruding piece 15a of the longitudinal feed friction drive bar 4; It is a little shorter than the total length not including 15b. The pair of left and right rail members 27a and 27b are connected and integrated with each other by the connecting members 24a and 24b. The intermediate portions between both ends are also connected and integrated with each other by a plurality of intermediate connecting members 28 arranged at appropriate intervals. It has become. 29 is a cable rack arranged along the roller rail 22 with the flange, and is supported by the inward extending portions of the connecting members 24 a and 24 b and the intermediate connecting member 28.

  The wrinkleless roller rail 23 can move in the length direction of the pair of left and right long rod-like sliding members 2a and 2b of the sliding bed 1 on the side where the concave groove portions 12a to 12f are not arranged in parallel. Although only the wrinkle-free roller 30 is used in place of the both-wrinkled rollers 26 of the wrinkled roller rail 22, the wrinkled roller rail 22 has basically the same structure. Since the cable rack 29 is not provided side by side on the wrinkleless roller rail 23 side, the intermediate connecting member 28 is not extended inward.

  The friction drive means 25 is configured according to the present invention, and includes a drive roller 31 that presses against the lower side surface 4a of the longitudinal feed friction drive bar 4 of the sliding bed 1, and a motor 32 that rotationally drives the drive roller 31. I have. The details of the friction drive means 25 will be described with reference to FIGS. 17 to 20. One end of a vertical movement arm 35 is pivotally supported by a horizontal support shaft 36 on a bearing member 34 erected on a base 33. On the free end side of a vertically moving arm 35 that can swing up and down around the horizontal support shaft 36, a motor 32 having a drive roller 31 attached to an output shaft is located outside the base 33 and the base. It is attached so that the front side of 33 is adjacent to the substantially central position.

  The vertical movement arm 35 is fixed to a pair of left and right arm plates 37a, one end of which is pivotally supported by the horizontal support shaft 36 so as to swing up and down, and an extension direction of the arm plate 37a. The motor support plate 37b having a wide top and bottom and an L shape on the plane is bent, and the motor 32 is attached to one side of the extension plate portion of the motor support plate 37b. When the drive motor 31 is pivotally supported on the opposite side of the extension plate portion, the drive roller 31 is positioned at an extension position of the pair of left and right arm plates 37a in plan view.

  A spring that is fixed to the upper side of the vertically moving arm 35 so as to cover the pair of left and right arm plates 37a and the motor support plate 37b and extends to the side opposite to the side where the motor 32 is located with respect to the arm plate 37a. A receiving plate 38 is provided, and a compression coil spring 39 is vertically interposed between the spring receiving plate 38 and the base 33, and the vertical movement arm 35 is attached upward by the compression reaction force of the compression coil spring 39. The drive roller 31 supported by the vertical movement arm 35 is urged upward together with the motor 32.

  An L-shaped plate portion 40 is continuously provided downward from a lower side parallel to the front side of the base of the motor support plate 37b, and a vertical plate of the L-shaped plate 40 is provided on the front side of the base 33. Is formed so that the lower horizontal plate portion 40a of the L-shaped plate portion 40 enters the lower side of the base 33. Thus, a stopper plate 42 with a stopper pin 41 attached to the tip is attached to the bottom surface side of the base 33 so as to face the lower end horizontal plate portion 40a of the L-shaped plate portion 40, as shown in FIG. As described above, the lower end horizontal plate portion 40a of the L-shaped plate portion 40 abuts on the stopper pin 41 so that the upward movement of the drive roller 31 biased upward by the compression coil spring 39 is limited. ing.

  Further, the friction drive means 25 is provided with a detection mechanism 43 that indirectly detects the sliding bed 1 through the vertical movement of the drive roller 31. The detection mechanism 43 is a seesaw motion arm supported by a horizontal support shaft 45 on a bearing member 44 erected on a base 33 on the side opposite to the side where the compression coil spring 39 is provided with respect to the vertical movement arm 35. 46, a drive pin 47 attached to the side surface of the motor support plate 37b so as to be fitted to the front end bifurcated portion 46a of the seesaw motion arm 46 extending from the position of the horizontal support shaft 45 toward the motor 32, and a horizontal support A cam plate (detected portion) 48 attached to the free end portion of the seesaw motion arm 46 extending from the position of the shaft 45 to the side opposite to the side where the motor 32 is located, and a detection lever 49a on the cam plate 48 It is comprised from the limit switch 49 attached via the support plate 50 on the base 33 so that may be located.

  As shown in FIGS. 17 and 20, the front end portions of two mounting frames 51a and 51b parallel to each other in the front-rear direction are mounted on the rear side portion of the base 33, and the two mounting frames 51a. , 51b are respectively attached to both the left and right outer sides of the rear end portion and the front end portions of the left and right sides of the base 33 via bolts 53 that can be adjusted in height. Thus, as shown in FIGS. 10, 12, 17, and 20, one friction drive means 25 is provided for one rail unit 21, and the drive roller 31 is located at the center in the width direction of the front end of the rail unit 21. Installed to be located at. That is, the two mounting frames 51a projecting from the rear side of the base 33 so that the connecting member 24a on the front end side is positioned between the rear side of the base 33 and the pair of rear left and right installation panels 52. , 51b are placed on the connecting member 24a and bolted, and the respective mounting boards 52 around the base 33 are fixed on the floor surface with anchor bolts, and the friction drive means 25 is installed. As shown in FIGS. 12 and 13, the pair of left and right roller rails 22 and 23 in the rail unit 21 are also attached via bolts 54a and 54b whose height can be adjusted at appropriate intervals in the length direction. The installation board 55a provided with the installation boards 55a and 55b and attached to the rail member 27a located outside can be fixed on the floor surface with anchor bolts.

  The rail units 21 having the above-described configuration are installed in series along the longitudinal feed travel path 20 of the sliding platform 1, and the installation pitch of each rail unit 21 at that time is as shown in FIG. As shown by the phantom lines in FIG. 7 and FIG. 8, the sliding platform 1 adjacent to the front and rear storage pitches in one longitudinal feed travel path 20 is formed by projecting pieces 15a, One of the projecting pieces 15a and 15b having the same length as the pitch between the sliding bed 1 when they are in a state of being opposed to each other via 15b, in other words, the entire length of the longitudinal driving friction drive bar 4 Is installed so that the distance L2 between the drive rollers 31 of the friction drive means 25 is equal to the length L1 obtained by adding the above length. Therefore, a little space is formed between the roller rails 22 with the flanges of the rail units 21 adjacent to the front and back and between the roller rails 23 without the flanges as shown in the figure, but the ends of the roller rails 22 with the flanges located across the space. The distance between the wrinkled rollers 26 in the part and the distance between the wrinkled rollers 30 at the end of the wrinkled roller rail 23 are the distance between the wrinkled rollers 26 in the wrinkled roller rail 22 and the wrinkled roller rail 23 and wrinkles free. Since the distance between the rollers 30 is narrower than the distance between the rollers 30, the sliding bed 1 can be safely and smoothly transferred between the rail units 21 adjacent to each other.

  In the longitudinal feed travel path 20 configured as described above, the sliding platform 1 always has the lower roller 4a of the longitudinal feed friction drive bar 4 and the drive roller of the friction drive means 25 provided in any rail unit 21. It is in the position which overlaps on 31. Thus, the drive roller 31 located on the lower side of the longitudinal feeding friction drive bar 4 resists the biasing force of the compression coil spring 39 from the ascending limit position shown in FIG. 19 as shown in FIG. It is pushed down by the longitudinal feed friction drive bar 4 and comes into pressure contact with the lower side surface 4a of the longitudinal feed friction drive bar 4 with a predetermined frictional force, and at the same time, the drive roller 31 is pushed down to become horizontal. The drive pin 47 of the vertical movement arm 35 swinging downward around the support shaft 36 pushes down the front end portion of the seesaw motion arm 46 of the detection mechanism 43 downward around the horizontal support shaft 45. The rear cam plate 48 pushes the detection lever 49a of the limit switch 49 upward, and the limit switch 49 in the OFF state (sliding platform non-detection state) is in the ON state. It will be switched to the slip loading platform detection state). The motor 32 is operated in conjunction with the limit switch 49 being switched to the sliding platform detection state, and the drive roller 31 is rotationally driven in the sliding platform propulsion direction, whereby the longitudinal feed friction drive bar 4 has its length. The sliding platform 1 is frictionally driven in the direction, and is guided to the roller rail 22 and the roller rail 23 of the rail unit 21 via the roller 26 and the roller 30 with the hooks, while the longitudinal feed travel path 20 The top is driven forward in the longitudinal direction of the friction drive bar 4 for vertical feed, that is, in the vertical direction.

  When the sliding platform 1 travels on the longitudinal feed travel path 20 in the longitudinal direction of the longitudinal feed friction drive bar 4 as described above, that is, in the longitudinal direction, the rod-shaped sliding member 2a on one side of the sliding platform 1 At this time, the flanges on both sides of the roller 26 with both sides sandwiching the rod-like sliding member 2a are slid on the rod-like sliding member 2a. A pair of front and rear short rod-shaped sliding members 3a, 3b, a transverse feed friction drive bar 5, and slant coupling members 8a, 9a in the groove portions 12a-12f formed adjacent to the rod-shaped sliding member 2a. Will pass. In other words, it is a roller with a hook that causes the sliding platform 1 traveling on the longitudinal feeding traveling path 20 to slide sideways in the lateral direction with respect to the length direction of the rod-shaped sliding member 2a (vertical feeding friction drive bar 4). This can be prevented by sandwiching the rod-shaped sliding member 2a by the flanges on both sides of the roller 26 with both flanges of the rail 22.

  Immediately before the protruding piece 15b projecting from the rear end of the longitudinal feed friction drive bar 4 of the sliding bed 1 forwardly driven as described above moves forward from the drive roller 31 of the friction drive means 25, As described above, the drive roller 31 of the friction drive means 25 of the next rail unit 21 adjacent to the direction side protrudes from the front end of the longitudinal feed friction drive bar 4 of the sliding platform 1 as described above. At the same time, the limit switch 49 of the detection mechanism 43 of the friction drive means 25 is switched from the OFF state (sliding bed non-detection state) to the ON state (sliding bed detection state) and rotated by the motor 32 in the sliding bed propulsion direction. Since it is driven, the sliding platform 1 is continuously driven by the driving roller 31 of the friction driving means 25 of the next rail unit 21 without stopping, and continuously. It will forward travel along the feed travel path 20. The drive roller 31 of the friction drive means 25 which is relatively rearwardly separated from the protruding piece 15b at the rear end of the longitudinal feed friction drive bar 4 of the sliding bed 1 is raised to the ascent end position by the urging force of the compression coil spring 39. The drive pin 47 of the vertically moving arm 35 that is restored and swings upward around the horizontal support shaft 36 along with this moves the front end of the seesaw motion arm 46 of the detection mechanism 43 upward around the horizontal support shaft 45. Since the push-up is performed, the cam plate 48 at the rear end of the seesaw movement arm 46 is lowered, the detection lever 49a of the limit switch 49 swings downward, and the limit switch 49 is turned off from the ON state (sliding platform detection state). Return to (sliding platform non-detection state). The drive roller 31 can be stopped by turning off the power to the motor 32 by the operation of the limit switch 49.

  The friction drive means 25 of each rail unit 21 can be controlled by various conventionally known methods according to the travel conditions required for each sliding platform 1 on the longitudinal feed travel path 20. As an example, when the driving roller 31 is pushed down by the longitudinal driving friction drive bar 4 of the sliding platform 1 and the detection mechanism 43 (limit switch 49) is in the ON state (sliding platform detection state), it is one lower level. Only when the detection mechanism 43 (limit switch 49) of the friction drive means 25 of the side rail unit 21 is in the OFF state (sliding bed non-detection state), there is a control method for operating the motor 32 to drive the drive roller 31 to rotate. Are known.

  FIGS. 14-16 shows the structure of the lateral feed travel path 60 of the sliding carrier 1, and this lateral feed travel path 60 is configured by installing rail units 61 in series at appropriate intervals in the travel path direction. ing. Each rail unit 61 has the same structure, and includes a roller rail 62 with a flange and a roller rail 63 without a flange, a connecting member 64 that connects and integrates the positions near the front end portions of both roller rails 62 and 63, and the connecting member. The friction drive means 65 is attached to 64. The roller rail 62 with a collar and the roller rail 63 without a collar of the rail unit 61 are a roller rail 22 with a collar and a collar without a collar of the rail unit 21 constituting the longitudinal feed traveling path 20 described above with reference to FIGS. The roller rail 23 has the same structure with only a difference in length and interval, and the friction drive means 65 has the same structure as the friction drive means 25 provided in the rail unit 21, and therefore has the same reference numerals. The description is omitted. The position of the cable rack 66 attached to the rail unit 61 is opposite to that of the cable rack 29 of the rail unit 21, but it may be arranged on the same side as the rail unit 21. Depending on the case, the rail unit 20 or 60 can be omitted.

  Thus, the flanged roller rail 62 of the rail unit 61 includes the rod-shaped sliding member 3a on the side where the recessed groove portions 13a to 13d are provided side by side among the pair of short rod-shaped sliding members 3a and 3b in the front and rear of the sliding bed 1. The wrinkle-free roller rail 63 supports the other rod-shaped sliding member 3b. The wrinkle-free roller 26 and wrinkle-free roller of these roller rails 62 and 63 are supported. 30 is a horizontal support shaft between a pair of left and right rail members 27a and 27b at an interval at which the rod-shaped sliding members 3a and 3b can always be supported by at least two roller 26 and the roller 30 without ribs. The rail members 27a and 27b are supported so that the total length of the rail members 27a and 27b is slightly shorter than the total length not including the projecting pieces 16a and 16b of the transverse feed friction drive bar 5. A. The drive roller 31 of the friction drive means 65 is in pressure contact with the lower side surface 5 a of the lateral feed friction drive bar 5 of the sliding platform 1.

  The rail units 61 having the above-described configuration are installed in series along the lateral feed travel path 60 of the sliding platform 1, and the installation pitch of each rail unit 61 at that time is as shown in FIG. As shown by the phantom lines in FIG. 7 and FIG. 8, the sliding platform 1 adjacent to the front and rear storage pitches in one lateral feed travel path 60 is arranged so that the lateral feed friction drive bars 5 are projected pieces 16a, One of the projecting pieces 16a and 16b having the same length as the pitch between the sliding platform 1 when they are in a state of being opposed to each other via 16b, in other words, the entire length of the frictional drive bar 5 for lateral feed. Is installed so that the length L3 obtained by adding the above length and the distance L4 between the drive rollers 31 of the friction drive means 65 are equal. Therefore, a space is formed between the roller rails 62 with the flanges of the rail units 61 adjacent to the front and the rear and between the roller rails 63 without the flanges as shown in the figure, but the ends of the roller rails 62 with the flanges located across the space. The distance between the wrinkled rollers 26 in the part and the distance between the wrinkled rollers 30 at the end of the wrinkled roller rail 63 are the distance between the wrinkled rollers 26 in the wrinkled roller rail 62 and the wrinkled roller rail 63 and wrinkles free. Since the distance between the rollers 30 is narrower than the distance between the rollers 30, the sliding platform 1 can be transferred safely and smoothly between the rail units 61 adjacent to each other in the front-rear direction.

  In the transverse feed travel path 60 configured as described above, the sliding platform 1 always has a driving roller of the friction drive means 65 provided on any rail unit 61 on the lower side surface 5a of the transverse feed friction drive bar 5. It is in the position which overlaps on 31. Thus, the drive roller 31 of the friction drive means 65 provided in each rail unit 61 is controlled under the same conditions as the drive roller 31 of the friction drive means 25 provided in each rail unit 21 in the longitudinal feed travel path 20 described above. For example, the sliding bed 1 is laterally fed on the lateral feed traveling path 60 while being guided by the roller rail 62 and the roller rail 63 with the hooks of the rail unit 61 through the roller 26 with the hooks and the roller 30 with the hooks. The friction drive bar 5 is driven forward in the length direction, that is, in the lateral direction.

  When the sliding platform 1 travels on the lateral feed travel path 60 in the length direction of the lateral feed friction drive bar 5 as described above, that is, in the lateral direction, the rod-shaped sliding member 3a on one side of the sliding platform 1 The roller 26 of the rail unit 61 slides on the roller 26 with the hooks. At this time, the hooks on both sides of the roller 26 with the rods sandwiching the rod-shaped sliding member 3a are rod-shaped sliding members 3a. A pair of left and right long rod-shaped sliding members 2a, 2b and a longitudinal feed friction drive bar 4 that intersect with the rod-shaped sliding member 3a pass through the recessed groove portions 13a to 13d formed adjacent to the rod-shaped sliding member 3a. In other words, the sliding load carrier 1 traveling on the lateral feed traveling path 60 slides laterally in the lateral direction with respect to the length direction of the rod-shaped sliding member 3a (lateral feed friction drive bar 5). This can be prevented by sandwiching the rod-shaped sliding member 3a with the flanges on both sides of the both-side roller 26 of the rail 62.

  Similar to the friction drive means 25 of each rail unit 21 on the longitudinal feed travel path 20, the friction drive means 65 of each rail unit 61 is conventionally known in various ways depending on the travel conditions required for each sliding platform 1. Can be controlled.

  As described above, the sliding platform 1 shown in FIGS. 1 to 9 can travel (vertically feed) in the longitudinal direction parallel to the longitudinal direction of the sliding platform 1 in the longitudinal feed travel path 20. In the lateral feed travel route 60, the travel (transverse feed) can be performed in the lateral direction parallel to the lateral width direction of the sliding platform 1. Of course, the transport path for transporting the workpiece W using the sliding platform 1 is, for example, two vertical feed travel paths 20 (or lateral feed travel paths 60) that are arranged in parallel and whose travel directions are opposite to each other, and By various conventionally known traversers for transferring the sliding platform 1 between the ends of both the longitudinal feeding traveling paths 20 (or the lateral feeding traveling paths 60), the sliding platform 1 can be endlessly circulated. In this case, the lateral feed travel route 60 (or the vertical feed travel route 20) can be used as the transport route of the sliding bed 1 by the traverser.

  The loading platform driven by the friction driving means of the present invention is not limited to the skid type sliding loading platform 1 shown in the above embodiment, but rolls on a pair of left and right guide rails laid on the traveling path side. It may be a cart-type loading platform equipped with wheels. The detector of the detection mechanism 43 provided in the friction drive means of the present invention is not limited to the limit switch 49 that is operated by the cam plate 48 that is the detected portion of the free end of the seesaw motion arm 46, but an electromagnetic sensor. Various other detectors can be used, such as a photoelectric sensor. Accordingly, the detected portion at the free end of the seesaw motion arm 46 may be configured according to the detector to be used.

Fig. A is a plan view of a sliding bed, B is a side view, and C is a bottom view. It is a front view of a sliding bed. Fig. A is an enlarged view of a portion C (or portion E) in Fig. 1, and Fig. B is a cross-sectional view taken along line AA in Fig. A. It is an enlarged view of the A section of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is a front-end | tip part enlarged side view of the friction drive bar. FIG. 8 is a plan view of FIG. 7. FIG. 8 is a front view of FIG. 7. It is a top view which shows a part of vertical feed traveling route. It is a side view of FIG. It is a principal part enlarged view of FIG. It is a front view of FIG. It is a top view which shows a part of transverse feed driving | running route. It is a front view of one rail unit which comprises a transverse feed travel path. FIG. 15 is an enlarged side view of FIG. 14. It is a top view which shows a friction drive means. It is the longitudinal cross-sectional rear view. Fig. A is a partially cutaway side view showing the friction drive means when the drive roller is in the ascending limit position, and Fig. B is an enlarged view of a part thereof. It is a vertical side view which shows the friction drive means in the state in which the drive roller was pushed down with the friction drive bar of a sliding bed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding bed 2a, 2b A pair of left and right long rod-like sliding members 3a, 3b A pair of front and rear short rod-like sliding members 4 Vertical feed friction drive bar 5 Horizontal feed friction drive bar 4a, 5a Lower side surface 8a of friction drive bar ˜9b Diagonal connecting member 10 Contact plate 11 Work support attachments 12a to 12f, 13a to 13d Concave groove portions 15a to 16b Protruding piece 20 Vertical feed travel path 21 Rail units 22 and 62 of longitudinal feed travel path Roller rails 23 and 63 with hooks Fenceless roller rails 25, 65 Friction drive means 26 Rolled rollers 27a, 27b Rail member 30 Flawless roller 31 Drive roller 32 Motor 35 Vertical movement arm 36 Horizontal support shaft 37a A pair of left and right arm plates 37b Motor support plate 38 Spring support Plate 39 Compression coil spring 40 L-shaped plate portion 42 Stopper pre DOO 43 detecting mechanism 47 drive pins 49 limit switch 60 traversing travel path 61 traversing the travel path of the rail unit

Claims (6)

  A friction driving bar is attached to the loading platform supporting the workpiece in parallel with the conveying direction, and friction driving means having a driving roller that presses against the lower surface of the friction driving bar is provided on the traveling path side of the loading platform. In the friction drive conveying apparatus arranged at appropriate intervals, the friction drive means is supported by a vertical movement arm that is pivotally supported on a base so that it can swing up and down within a certain vertical range, and the vertical movement arm. A horizontal horizontal motor, a driving roller attached to the output shaft of the motor, a spring disposed on the base at a lateral side position of the vertical movement arm and biasing the vertical movement arm upward, and A detection mechanism for detecting that the driving roller is pushed down by the lower surface of the friction drive bar on the loading platform side, and the detection mechanism is on the side where the spring is located with respect to the vertical movement arm; Is a seesaw motion arm whose intermediate position is pivotally supported on the base in parallel with the vertical movement arm on the opposite side, and the vertical movement between one end of the seesaw movement arm and the middle part of the vertical movement arm. A friction drive conveying apparatus comprising: linkage means for linking movement; and a detector for detecting an upward movement of the other end detected portion of the seesaw movement arm that moves up and down in a direction opposite to the drive roller.   The motor and the driving roller are positioned laterally outward from the base, and the driving roller pushed down on the lower surface of the friction drive bar on the cargo bed side is lowered to a level overlapping the base. The friction drive conveying apparatus according to claim 1, wherein   The vertical arm is composed of a pair of left and right arm plates that are pivotally supported by a horizontal support shaft, and a motor support plate that is fixed to the tip of the arm plate and bends and extends in an L shape in the extending direction of the arm plate. 3. The friction drive conveyance device according to claim 1, wherein a motor-side drive roller attached to the motor support plate is located at an extended position of the pair of left and right arm plates.   An L-shaped plate portion into which a lower end horizontal plate portion enters the lower side of the base from the lower side of the motor support plate is connected, and the vertical movement range of the vertical movement arm is the lower end horizontal of the L-shaped plate portion. The friction drive conveyance apparatus of Claim 3 currently controlled in the range of the space between a board part and the base located in the upper side.   A spring receiving plate is provided with one end fixed to the upper side of the middle portion of the vertical movement arm and extending to the side opposite to the side where the seesaw motion arm of the detection mechanism is located, and this spring receiving plate and the base below it The friction drive conveyance device according to any one of claims 1 to 4, wherein a compression coil spring is interposed therebetween.   The link means between the vertical movement arm and the seesaw movement arm is composed of a drive pin protruding from a side surface of the vertical movement arm and a bifurcated portion at one end of the seesaw movement arm sandwiching the drive pin. The friction drive conveyance apparatus of any one of -5.

Images