JP2007070015A - Index mechanism in conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an index mechanism capable of maintaining holding force for stopping the sway in the rotational direction of an article to be conveyed in a relatively short time and simultaneously continuing the positioning state when turning and conveying the article having the heavy weight. <P>SOLUTION: The index mechanism comprises an index guide part 6 which is provided on a stay rotating unit 4 in a flange shape, and turned around the axis of the stay rotating unit, groove parts 62 for a stopper cut out in a circumferential edge of the index guide part at an adequate spacing, and a stopper 8 which is supported by a stay base part 3 and urged toward the circumferential edge of the index guide part. A rotary roller abutting part 82 is provided on a tip of the stopper. The groove part for the stopper is formed in a groove in which two parts of the circumferential edge of a roller abutting part are abutted thereon when the roller abutting part is engaged therein. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mechanism (so-called index mechanism) for positioning a conveyed product in a predetermined direction.

  Generally, industrial parts or semi-finished products are spray-painted by a painting machine or a painting robot. In this kind of painting process, parts to be painted (hereinafter referred to as painting objects) are fixed. Therefore, a transport device such as an overhead conveyor has been used. Moreover, when moving a coating target object with this conveying apparatus, it was set as the structure which rotates a hanger for the purpose of spraying a uniform coating material on a coating surface (refer patent document 1).

  However, since the main device for conveyance is installed above the trolley on which the workpiece is to be mounted, there is a possibility that fine dust or the like may fall on the workpiece when the hanger is conveyed. Therefore, in the said patent document 1, the dust-proof umbrella was provided and adhesion of workpiece | work, such as falling dust, was prevented. However, the dust-proof umbrella could not sufficiently prevent the fall of dust and the like.

  In view of this, the present applicant has developed a transport device using a traveling body capable of self-propelling while supporting a transported object on an upper end of a support column erected upward (see Patent Document 2). We have also developed a transport device that can rotate around (see Patent Document 3). During transport in a long distance section, it is possible to change the direction in a predetermined section such as a painting line or a drying line, and to change the direction of the transported object. Provided is a transport apparatus that can change the interval (transport pitch) between a plurality of transported objects that are aligned in the front-rear direction.

Further, as a rotary substrate positioning device, a concave portion is provided on the outer periphery of the substrate support base that horizontally supports the substrate, and an engaging body is provided at the tip of the rod that linearly advances and retreats toward the concave portion. There has been a positioning device that moves forward and engages an engaging body with a recess of a substrate support (see Patent Document 4).
JP 2001-79464 A (FIGS. 1 and 2) Noto 3086461 gazette (Fig. 1) Noto 3090636 gazette (FIGS. 1, 3, 6, and 7) JP 2002-164415 A (FIG. 3)

  The index mechanism (Act No. 3090636) of the transport apparatus described above is provided with an engaging recess in the index guide portion provided in a bowl shape on the support column rotating portion, and presses the roller member to the periphery of the index guide portion. The configuration is such that the rotation of the index guide portion is stopped by engaging the roller member in the engaging recess. However, when a relatively lightweight transported object is loaded and transported while being rotated, it is suitable without any problem. However, in order to stop the rotation of a heavy transported object by the mechanism, a roller is used. The pressing of the member must be made strong. Generally, when the pressing force of the roller member is applied by using an urging force of a spring or the like, the spring is made strong and the urging force of the spring is supported. It is necessary to increase the strength of the member, and the entire apparatus is to be enlarged.

  In addition, if the weight of the transported object increases, a large inertial force in the rotational direction is generated in the rotated support column rotating part. Even when a strong spring is used as described above, the index is Although the rotation of the guide portion can be stopped, the index guide portion does not stop instantaneously, but does not stop completely until the shaking in the rotation direction around the conveyed object converges.

  In the rotary substrate positioning device (Japanese Patent Laid-Open No. 2002-164415), the rotation of the substrate support base can be reliably stopped by engaging the engaging body with the concave portion of the substrate support base. Although it is possible, in order to engage the engaging body with the concave portion of the substrate support base, it is necessary to move the rod forward and backward, and the driving means for driving the rod and the operation of the driving means require a certain time. Therefore, it has been difficult to use as an index mechanism in a transporting apparatus in operation.

  The present invention has been made in view of the above-described points. The object of the present invention is to sway the rotational direction of a transported object in a relatively short time when rotating a heavy transported object. And an index mechanism capable of maintaining a holding force for continuing the positioning state at the same time.

  Therefore, the present invention provides a traveling body that travels along the conveyance path, a support base that is fixedly supported by the traveling body, and is provided continuously in the axial direction of the support base, and rotates around the axis. In a transport device including a support column rotating unit that is allowed to move and a transport tray provided at the upper end of the support column rotating unit, the support column rotating unit is provided in a bowl shape, and the support column rotating unit rotates to rotate the support column rotating unit. An index guide part that rotates about the axis of the support column rotating part, a stopper groove part that is cut out at an appropriate interval around the periphery of the index guide part, and a periphery of the index guide part that is supported by the support base part A stopper that is biased toward the stopper, and a roller contact portion that is rotatable is provided at the tip of the stopper, and the groove for stopper is inserted into the roller contact portion when the roller contact portion is engaged. It is an gist index mechanism in the transport device, characterized in that the peripheral edge of the contact portion is the groove stopper formed in contact with the groove-shaped at two positions.

  According to the above configuration, the column base that is fixedly supported by the traveling body is allowed to rotate around the axis of the column rotating unit that is continuous in the axial direction. The index guide portion configured in the shape rotates around the axis along with the rotation of the column rotating portion. On the other hand, the stopper is provided on the support base that is fixedly supported, and is configured to change the relative positional relationship with the index guide portion as the support rotation portion and the index guide portion rotate. ing. In addition, a roller contact portion that is urged against the peripheral edge of the index guide portion is provided at the tip of the stopper, and this roller contact portion always contacts the peripheral shape of the index guide portion. Can be done. Therefore, when the index guide portion rotates, the roller contact portion at the tip of the stopper changes the relative position along the periphery of the index guide portion, and the stopper groove portion provided on the periphery of the index guide portion. When the roller abutting portion reaches, the roller abutting portion is engaged in the stopper groove portion, and the rotation of the index guide portion is restricted. As described above, the roller abutting portion is engaged with the stopper groove portion, so that the stopper locks the index guide portion, thereby exhibiting the index function.

  In the above invention, the stopper groove can be a stopper groove formed in a groove shape having a width slightly smaller than the diameter of the roller contact portion. By configuring such a stopper groove portion, when the roller contact portion is engaged with the stopper groove portion, a part of the roller contact portion is submerged in the stopper groove portion. The two points of the contact portion come into contact with both edges of the opening of the stopper groove portion, which makes it difficult for the roller contact portion to separate from the stopper groove portion.

  Further, in the above invention, at the periphery of the index guide part excluding the stopper groove part, a rolling edge part composed of an arcuate edge centered on the center of the index guide part, and the stopper groove part An arcuate guide end edge having a sharp curvature in the periphery, and when the roller contact portion engages with the stopper groove, the arcuate guide end edge located on both sides of the roller abutment and the stopper groove It can be configured as a roller abutting portion that abuts in the vicinity of the boundary. In this case, when the roller contact portion rolls on the periphery of the index guide portion, the roller contact portion moves along the arc-shaped end edge, moves along the arc-shaped guide end edge portion, and engages with the stopper groove portion. When the roller contact portion rolls along the arcuate edge, the index guide portion can be easily rotated, and the roller contact portion engages with the stopper groove. Will be allowed to rotate. When the roller contact portion reaches the arcuate guide end edge portion, the roller contact portion is guided to the stopper groove portion, and the stopper groove portion is easily locked by the roller contact portion.

  Furthermore, in the above invention, the index guide portion has a substantially square planar shape, the stopper groove portion is provided in the center of the four sides of the square, and both edges of the four apex angles of the square are guide edges with gentle curves. Can be configured. In this case, since the guide end edge portion is arranged on both sides with the corner of the square as the apex, the roller contact portion is used as a stopper in a state where the roller contact portion contacts the peripheral edge of the index guide portion. It will always guide toward the groove. The guidance at this time acts to rotate the index guide portion, but this rotational force is generated when the roller abutting portion strongly biases the guide end edge portion. The urging force of the abutting portion acts as a component force in the surface direction of the guide end edge portion, and as a result, the index guide portion is rotated.

  In the above invention, the stopper groove portion is a stopper groove portion provided at intervals formed by dividing the periphery of the index guide portion into four equal parts, and the column rotating portion has a substantially cross-shaped operating arm. A roller rotating part provided with a driving force giving means, and the roller abutting part already engaged in one stopper groove when the column rotating part receives a forced rotating force by the driving force giving means By rotating the index guide part against the urging force, and the roller contact part is engaged with the adjacent stopper groove part via the peripheral edge of the index guide part, the column rotating part in units of 90 ° Can be configured to rotate.

  According to the above configuration, the column rotating unit is given a rotating force by operating a single arm at a predetermined position among the substantially cross-shaped operating arms, and the rotating force is applied to other adjacent arms. The rotation can be made in units of 90 ° by moving to a predetermined position. Then, by rotating the column rotating part in units of 90 °, the column rotating part is engaged with a stopper groove provided at a position obtained by dividing the peripheral edge of the index guide unit into four equal parts. It is possible to allow the unit to rotate in units of 90 ° and to stop the post rotating unit after the rotation.

  According to the present invention, the roller abutting portion supported by the column base is engaged with the stopper groove of the index guide unit provided in the column rotation unit, so that the column rotation unit is rotated via the index guide unit. In the above engagement state, the roller contact portion is urged toward the stopper groove portion, and both ends of the opening of the stopper groove portion are in contact with the two portions of the roller contact portion. As long as a force component of the urging force acts on both ends of the opening and a strong rotational force is not applied to the index guide part, the above engagement of the roller contact part cannot be released, and the index guide part The rotation can be stopped. As a result, it is possible to stop the rotation of the transport tray provided in the column rotating section and the transported object loaded on the transport tray.

  When the weight of the conveyed product is large, the inertial force due to the rotation increases. However, in the state where the roller contact portion is engaged with the stopper groove portion, the roller contact portion is strongly urged and the stopper groove portion is energized. Therefore, the rotation of the index guide portion can be stopped even if a considerable inertia force is applied.

  Further, the state where the rotation of the index guide portion is stopped as described above, that is, the positioning state is stably maintained by the roller contact portion and the stopper groove portion. Even if some external force may act in the rotation direction (for example, the center of gravity of the conveyed object is located at a point different from the rotation center of the index guide part, and inertial force due to acceleration or gravity in the inclined conveyance path acts. In this case, the holding force for positioning is maintained.

  Further, according to the invention in which the guide edge portion is formed on the periphery of the index guide portion, the index guide portion rotates, and the guide edge portion contacts the roller contact portion. It will be guided so that the roller contact part is engaged with the stopper groove part. If the index guide part is insufficiently rotated due to the inertial force of the conveyed product, or the rotational force becomes strong. Even when the roller contact portion is not reliably engaged with the stopper groove portion, the index guide portion is rotated so as to guide the roller contact portion to the stopper groove portion.

  Furthermore, according to the invention in which the groove portion for the stopper is provided in the interval formed by dividing the peripheral edge of the index guide portion into four equal parts and the driving force giving means having the substantially cross-shaped operating arm is provided, the driving is performed on one of the operating arms. When the force is transmitted and a rotational force equivalent to 90 ° acts on the index guide portion, the stopper groove portion in which the roller contact portion is already engaged is released and the adjacent stopper groove portion is It will accept the engagement of the roller abutting portion and enable intermittent rotation every 90 °.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown schematically in FIG. 1, the present embodiment is an index mechanism provided on a traveling body 2 that self-travels along a conveyance path 1. The traveling body 2 includes a column composed of a column base 3 and a column rotating unit 4, and a conveyance tray 5 is supported on the upper end of the column, and the conveyance object W is conveyed while being loaded.

  As shown in detail in FIG. 2, the structure of the column supported by the traveling body 2 is a circular recess 31 that opens upward at the upper end of the column base 3 fixedly supported by the body portion of the traveling body 2. The lower end 41 of the column rotating part 4 is formed in a bar shape having a circular cross section that can be loosely fitted in the circular recess 31, and the lower end 41 of the column rotating part 4 is By loosely fitting in the circular recess 31, the support column rotating part 4 can rotate around the axis while continuing in the axis direction of the support base 3. Further, an index guide portion 6 is provided near the lower end of the column rotating portion 4, and a driving force giving means 7 is provided near the middle.

  The index guide unit 6 is provided in a bowl shape with respect to the column rotating unit 4 and is configured to rotate together with the column rotating unit 4. Further, the peripheral edge 61 of the index guide portion 6 has an arc shape centered on the center of the index guide portion 6, and the overall shape is formed in a substantially circular plate shape. The stopper groove 62 is formed by cutting out the groove. The stopper groove 62 is a groove formed in a concave shape from the peripheral edge 61 toward the center, and the imaginary line in the radial direction of the index guide portion 6 at the predetermined position is a center line X and is parallel to the center line X. It is configured by cutting out into a shape having a notch edge on both sides. A guide portion 63 having a curvature that is steeper than the circular arc of the peripheral edge 61 is formed at the boundary between the peripheral edge 61 of the index guide portion 6 and the cutout portion.

  The driving force imparting means 7 has operating arms 71, 72, 73, 74 that project radially from the support column rotating unit 4, and the above-mentioned self-propelled traveling body 2 moves along the transport path 1. Along with this, a driving force is applied by a driving force transmission mechanism installed in advance around the transport path 1. The driving force transmission mechanism can be either a fixed type or a movable type. The fixed type is a regulation rail that regulates the positions of the operating arms 71 to 74 protruding from the column rotating part 4 in the middle of the conveyance path. As the traveling body 2 travels, the contact portions 75, 76, 77, 78 provided at the tips of the operating arms 71 to 74 are guided to predetermined positions along the regulation rail, and the driving force It is a form in which the angle of the giving means 7 is changed, and the mobile type is a form in which the operating arm 71 to 74 is rotated to a predetermined angle while the traveling body 2 is traveling or stopped. This has already been disclosed in Noto 3090636.

  In contrast to the column rotating part 4 having the above-described configuration, the column base 3 is provided with a stopper 8 biased by a spring. The stopper 8 includes a rotation arm 81 whose base end is rotatably supported, a roller contact portion 82 provided at the tip, and a torsion coil spring 83 provided at the base end. . The base end 84 of the rotating arm 81 is supported by the tip end 34 of the support portion 33 integrally formed while projecting from the bracket 32 connected to the column base portion 3, and the tip end 34 of the support portion 33. The rotary shaft 35 is erected, and the rotary shaft 35 is inserted into a circular through-hole provided at the base end 84 of the rotary arm 81 to freely rotate.

  The torsion coil spring 83 is mounted by inserting a coil portion through the rotation shaft 35, and one end of the spring component member is supported by the support portion 33 and the other is supported by the rotation arm 81. On the upper surfaces of the support portion 33 and the rotating arm 81, spring support portions 36 and 86 are erected upward, and both ends of the spring constituting member are hooked. The torsion coil spring 83 is urged in a direction in which both ends of the spring constituent member are approached. Therefore, the spring support portion 86 of the rotating arm 81 is opposed to the spring support portion 36 of the support portion 33 that is fixedly provided. Is urged in the pulling direction, and the rotating direction of the rotating arm 81, that is, the roller contact portion 82 can be biased toward the peripheral edge 61 of the index guide portion 6.

  With the above configuration, the roller contact portion 82 comes into contact with being urged toward the peripheral edge 61 of the index guide portion 6, and rolls on the surface of the peripheral edge 61 when the index guide portion 6 rotates. The rotating arm 81 is rotated according to the unevenness of the peripheral edge 61. Accordingly, the roller abutting portion 82 is always urged by the spring 83 at the portion where the stopper groove portion 62 is provided and at the other peripheral edge 61, and the stopper groove portion 62 is provided. In the position, in the range allowed by the stopper groove portion 62, it is engaged while appropriately holding the pressing force toward the center of the index guide portion 6. In order for the roller contact portion 82 to be detached from the stopper groove portion 62, an external force that can rotate the rotation arm 81 against the biasing force of the spring 83 is applied to the roller contact portion 82. Will have to be granted.

  As a result, a considerable external force that should be forcibly rotated acts on the index guide portion 6, and when the radially outward component force of the external force acts on the roller contact portion 82, the spring 83 The roller contact portion 82 is moved outward in the radial direction against the urging force. When an external force less than that is applied, the roller contact portion 82 is engaged with the stopper groove 62. Thus, the rotation of the index guide portion 6 can be stopped.

  Here, as shown in FIG. 3, the stopper groove portion 62 is configured to have a uniform width dimension by parallel side edges 65 and 66, which is larger than the diameter of the roller contact portion 82. Is also slightly smaller. The first reason is that when the width of the stopper groove 62 is larger than the diameter of the roller contact portion 82, the bias applied when the roller contact portion 82 is engaged with the stopper groove 62. Accordingly, the bottom part of the stopper groove 62 is intruded, and the index guide part 6 cannot be rotated thereafter. Further, as a second reason, when the width dimension of the stopper groove 62 is much smaller than the diameter of the roller contact portion 82, the roller that moves the peripheral edge 61 of the index guide portion 6 by rolling or sliding. This is because the contact portion 82 can move beyond the stopper groove 62. Accordingly, the width of the stopper groove 62 is set so that the roller abutting portion 82 can be sufficiently engaged, and at the same time, the width of the stopper groove 62 is set so that the peripheral edge can be moved again. It is configured to be slightly smaller than the diameter of 62.

  In addition, if the standard regarding the width dimension of the groove part for a stopper is shown concretely, it is suitable to set it as 82.73%-86.6% with respect to the diameter of the roller contact part 82, However, It is limited to this range Is not to be done. The depth dimension of the stopper groove 62 is adjusted so that the peripheral edge of the roller contact portion 82 does not reach when the roller contact portion 82 is engaged with the stopper groove 62.

  Next, the operation | movement aspect of this embodiment is demonstrated. As described above, the roller contact portion 82 is configured to always contact the peripheral edge 61 of the index guide portion 6, and therefore, the roller contact portion 82 and the index guide portion 6 will be mainly described. When the roller contact portion 82 contacts the arcuate peripheral portion 64 of the index guide portion 6, the index guide portion 6 rotates smoothly as shown in FIG. The contact portion is moved while rolling on the surface of the arcuate peripheral portion 64.

  When the index guide portion 6 further rotates and the roller contact portion 82 reaches the vicinity of the stopper groove portion 62, the roller contact portion 82 is moved by the guide portion 63 to the stopper groove portion 62 as shown in FIG. Will be guided to. The guide portion 63 guides the engaging direction of the roller contact portion 82, but the roller contact portion 82 is only allowed to move with the rotation of the rotation arm 81. Substantial guidance by the guide unit 63 is for the index guide unit 6. That is, the rotation of the index guide portion 6 is guided so that the stopper groove portion 62 can be engaged with the roller contact portion 82.

  As shown in FIG. 4C, the index guide portion 6 guided as described above allows the roller contact portion 82 to be engaged with the stopper groove portion 62, and the engagement by the roller contact portion 82 is allowed. The rotation of the index guide portion 6 is limited by the insertion. Here, since the stopper groove portion 62 is formed in the groove shape as described above, two portions in the vicinity of the boundary between the side edges 65 and 66 and the guide portion 63 are the peripheral edges of the roller contact portion 82. It will be in contact with the two places. At this time, the urging force to the roller contact portion 82 acts toward the center of the index guide portion 6. However, since two portions of the roller contact portion 82 come into contact with each other, The component force acts at a predetermined angle with respect to the central direction, and the roller contact portion 82 makes it difficult to separate from the stopper groove portion 62. In this state, the rotation of the index guide unit 6 is stopped, and the rotation of the conveyed product W is stopped via the support column rotating unit 4 and the conveyance tray 5 on which the index guide unit 6 is supported. The index to match the direction of is completed.

  In the state where the roller abutting portion 82 is engaged with the stopper groove portion 62 as described above, an inertial force acts on the rotation of the index guide portion 6, and the inertial force is large, so that it will be detached from the engaged state. In this case, the index guide unit 6 is guided by the guide unit 63 as long as the roller contact unit 82 contacts the other guide unit 63 provided at a position facing the guide unit 63 that has already passed. As a result, the roller contact portion 82 is engaged with the stopper groove portion 62. Such a reversal is because a state in which no forcible rotational force on the index guide portion 6 (rotational force transmitted through the support column rotating portion 4 forcibly rotating force on the operating arms 71 to 74) is not applied. When the forcible rotational force is applied to the index guide portion 6, the roller contact portion 82 is detached from the stopper groove portion 62 and contacts the arcuate peripheral edge portion 64 as will be described later. .

  When further rotating the index guide portion 6 in a state where the rotation is stopped as described above, by applying a rotational force in a predetermined direction to the operating arms 71 to 74 of the above-described driving force giving means 7, As shown in FIG. 4D, the roller contact portion 82 is separated from the stopper groove 62. At this time, in a state where the roller contact portion 82 is engaged with the stopper groove portion 62, the component force of the urging force acting on the roller contact portion 82 is caused by the side edge 66 of the stopper groove portion 62 and the guide portion 63. Therefore, a circumferential rotational force exceeding this must act on the index guide portion 6. When the rotational force on the operating arms 71 to 74 is sufficient, the roller contact portion 82 moves the contact position to the guide portion 63, and further moves from the guide portion 63 to the arcuate peripheral portion 64. It will be. As described above, the roller abutting portion 82 abuts on the arc-shaped peripheral edge portion 64, whereby the index guide portion 6 rotates smoothly. The roller abutting portion 82 moves to the next stopper while sequentially moving the abutting position. It is possible to engage with the groove portion 62.

  By repeating the above operation, the conveyed product W is indexed each time the roller contact portion 82 is engaged with the stopper groove portion 62 of the index guide portion 6. As described above, the roller contact portion 82 engaged with the stopper groove portion 62 is difficult to separate from the stopper groove portion 62, so that a relatively heavy transport object W is being conveyed. Even in the case of indexing, it is possible to avoid erroneous operation due to the inertial force accompanying the rotation.

  Next, another embodiment will be described. In the present embodiment, as shown in FIG. 5A, the arc-shaped peripheral edge portion 64 provided on the peripheral edge 61 of the index guide portion 6 is deformed, and the arc-shaped peripheral edge portions 64 are adjacent to each other. The continuous arc-shaped peripheral edge portion 64 located in the middle of the two stopper groove portions 62 is located farthest from the center of the index guide portion 6 at its center and gradually toward the stopper groove portion 62. It is formed so that it may approach. In the case of providing four stopper groove portions 62 at equal intervals, this type of shape can be said to be a shape in which the entire shape of the index guide portion 6 is substantially square and the stopper groove portion 62 is formed at the center of the four sides. . The four apexes of the square index guide portion 6 are each formed in a smooth arc shape so that the roller contact portion 82 can easily roll, and peripheral portions 64a and 64b extending from the apex to the stopper groove portion 62. Can be formed into a gentle curve.

  With the above configuration, the peripheral edge portions 64 a and 64 b on both sides of the apex have a function as an extension portion of the guide portion 63 provided on both sides of the stopper groove 62. That is, as shown in FIG. 5B, when the roller contact portion 82 comes into contact with either position of the peripheral portions 64a and 64b, an urging force always acts on the roller contact portion 82. Therefore, a component force of the urging force acts along the inclination of the peripheral edge portions 64a and 64b, and this component force acts in a direction in which the index guide portion 6 is rotated although the component force is small. In a state where the external force (external force on the operating arms 71 to 74 (FIG. 1)) does not act on the guide portion 6 (that is, in a rotatable state), the index guide portion 6 is gradually rotated by the above-described component force. Specifically, the roller contact portion 82 is rotated until it engages with the stopper groove portion 62.

  Therefore, even when the index guide portion 6 does not rotate as planned for some reason, or when the roller contact portion 82 is detached from the stopper groove portion 62 due to vibration or the like in a normal conveyance state that should not be rotated, The roller contact portion 82 can be engaged with the predetermined stopper groove 62 again. In addition, during normal operation, the above situation is unlikely to occur. However, as a preliminary configuration for continuing stable operation, the index guide portion 6 can be shaped in advance. It is.

  Next, modifications of the above embodiments will be described. The modification described here is obtained by modifying the configuration for urging the roller contact portion 82 against the index guide portion 6. As shown in FIG. 6, the roller contact portion 182 is supported by the swing end of a substantially L-shaped swing arm 181, and this swing arm 181 protrudes from the bracket 132 at the bent portion 187. The support portion 133 is pivotally supported at the tip of the support portion 133 so as to be swingable. The base end 188 of the swing arm 181 is connected to a protruding piece 189 provided on the bracket 132 with a link 190 interposed therebetween, and a compression spring 183 is attached to this link.

  Therefore, with the above-described configuration, the compression spring 183 compresses the base end 188 of the swing arm 181 via the link 190, and this compression force biases the swing direction of the swing arm 181 in a constant direction. Accordingly, the roller contact portion 182 at the swing end is urged against the peripheral edge 161 of the index guide portion 106. This type of configuration can be used when a strong compression spring 183 can be used, so that the urging of the roller contact portion 182 is strong. As described in the above-described embodiment, when the roller contact portion 182 is engaged with the stopper groove portion 162 of the index guide portion 106, the roller contact portion 182 is contacted at two locations by the vicinity of the opening portion of the stopper groove portion. Therefore, the index can be realized without using the extremely strong compression spring 183.

  The embodiment of the present invention is as described above, but various modes can be taken without departing from the spirit of the present invention. For example, all the drawings referred to in the description of the above embodiment show a form in which the stopper groove portion 62 is provided at a position obtained by dividing the entire circumference of the index guide portion 6 into four equal parts. This is because it indicates an index mechanism for intermittently rotating in units of 90 °. Therefore, for example, when the structure is intermittently rotated in units of 120 °, the stopper groove 62 is provided at a position divided into three equal parts and in the case of being intermittently rotated in units of 180 degrees. It becomes possible to cope with. The intermittent rotation is applied with a rotational force by restricting the operating arms 71 to 74 of the driving force imparting means 7, but the index guide portion 6 can be rotated until a predetermined angle is reached. As described above, it is necessary to be guided by a regulation rail or the like during the conveyance. Therefore, in this case, it is also possible to adopt a configuration in which the installation angles and number of the operation arms 71 to 74 are made different according to the unit angle of the intermittent rotation. That is, when rotating in units of 90 ° as described above, as shown in FIG. 1, four arms 71, 72, 73, 74 are provided in a substantially cross shape, and the center line of each arm 71-74 is By arranging to form an angle of 90 °, the single arm 71 can be regulated to enable a 90 ° rotational drive. After the rotation, the order of the arms 71 to 74 moves 90 °. The overall shape is the same as before rotation. As a result, a device such as a regulation rail that should transmit the driving force to the driving force imparting means 7 can be provided in a uniform structure at any location during the transfer, so that the assembly of the equipment is extremely simple. Become. Therefore, when the rotation is intermittently performed with an angle other than 90 ° (for example, 120 °) as a unit, the angles and the number of the arms 71 to 74 can be appropriately changed according to the desired angle.

It is explanatory drawing which shows the whole conveying apparatus provided with embodiment of this invention. (A) is a front view of embodiment of this invention, (b) is IIB-IIB sectional drawing. It is explanatory drawing which shows the relationship between an index guide part and a stopper. It is explanatory drawing which shows the operation | movement aspect of embodiment of this invention. It is explanatory drawing which shows other embodiment. (A) is a front view which shows the modification of embodiment, (b) is VIB-VIB sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance path 2 Traveling body 3,103 Support | pillar base 4,104 Support | pillar rotation part 5 Conveyance tray 6,106 Index guide part 7 Driving force transfer means 8,108 Stopper 31 Circular recessed part 32,132 Bracket 33 Bracket tip 41 Lower end of support | pillar rotation part 61, 161 Index guide part peripheral edge 62, 162 Stopper groove part 63 Guide part 64 Arc-shaped peripheral part 64a, 64b Peripheral part 65, 66 Side edge 71, 72, 73, 74 of stopper groove part Actuating arm 75, 76, 77 78 Abutting portion 81 Rotating arm 82 182 Roller abutting portion 83 Torsion coil spring 84 Rotating arm base end 85 Rotating shaft 86 Spring supporting portion 181 Swing arm 183 Compression spring W Conveyed material

Claims (5)

A traveling body that travels along the transport path, a support base that is fixedly supported by the traveling body, and a support that is continuously provided in the axial direction of the support base and that is allowed to rotate about the axis. In a transport device provided with a rotating part and a transport tray provided at the upper end of the column rotating part,
An index guide portion that is provided in a bowl shape on the support column rotation unit and rotates around the axis of the support column rotation unit by the rotation of the support column rotation unit, and is configured by notching the peripheral edge of the index guide unit at appropriate intervals. A stopper groove, and a stopper that is supported by the support base and biased toward the periphery of the index guide,
The stopper tip is provided with a rotatable roller contact portion, and the stopper groove portion is formed into a groove shape that contacts the periphery of the roller contact portion at two locations when the roller contact portion is engaged. An index mechanism in a transport device, wherein the index mechanism is a formed stopper groove. 2. The index mechanism in the transport device according to claim 1, wherein the stopper groove is a stopper groove formed in a groove shape having a width slightly smaller than the diameter of the roller contact portion. The index guide portion has a curvature at a peripheral edge excluding the stopper groove portion, a rolling end edge portion formed by an arcuate edge centering on the center of the index guide portion, and a periphery of the stopper groove portion. An index guide part having an arcuate guide end edge formed suddenly, and when the roller abutting part is engaged with the stopper groove part, the arcuate guide end edge located on both sides of the roller contact part and the stopper The index mechanism in the transport device according to claim 1, wherein the index mechanism is a roller abutting portion that abuts in the vicinity of the boundary with the groove portion for use. The index guide portion has a substantially square planar shape, the stopper groove portion is provided at the center of the four sides of the square, and both sides of the four apex angles of the square form a guide end portion with a gentle curve. The index mechanism in the transport apparatus according to claim 1 or 2. The stopper groove portion is a stopper groove portion provided at intervals formed by dividing the periphery of the index guide portion into four equal parts, and the strut rotating portion includes driving force imparting means having a substantially cross-shaped operating arm. When the strut rotating part receives a forcible rotational force from the driving force giving means, it resists the bias of the roller abutting part already engaged in one stopper groove. 2. The column rotating portion is rotated in units of 90 ° by rotating the index guide portion and engaging the roller contact portion with the adjacent stopper groove portion via the peripheral edge of the index guide portion. 5. An index mechanism in the transport device according to any one of 4 to 4.

Images