JP2013095575A - Annular conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an annular conveying device which enables smooth annular conveyance and dispenses with maintenance, such as take up for traveling load carriers arranged annularly.SOLUTION: The annular conveying device has connection members 3 and 4 projected from both sides of the longitudinal direction of a connector 1 toward outside, and of the connection members, long hole portions 33 and 43 provided in an area locating outside of the connection body, through-holes 23 and 24 provided near an end portion of the traveling load carrier 2, and a connection shaft 5 which can be inserted through the long hole portion of the connection member and the through-hole of the traveling load carrier at the same time. Of a plurality of traveling load carriers arranged in the entire circumference of an annular conveying rail L, an arbitrary traveling load carrier is provided with a conveying tray 6 on which a workpiece is mounted, and a pole 7 for supporting the conveying tray.

Description

  The present invention relates to a workpiece transfer device, and more particularly to a device that transfers a workpiece while supporting the workpiece on a traveling body that runs along an annular transfer rail installed on a floor.

  A conventional transport device is provided with a transport rail along a track to be transported, and is composed of a traveling body that travels in the transport rail. The drive chain circulates and travels to move the traveling body. The body was configured to receive a driving force from the driving chain (see Patent Document 1).

  The transport device was developed by the inventor of the present application, and is a transport device having a stage function that enables three-dimensional operation and transmission and stop of driving force for each traveling body. This is suitable when it is necessary to stop the traveling body at a predetermined position while transporting the section.

  However, since a drive chain is required as a drive force transmission mechanism, the drive chain must be configured to move along the transport rail, and the height dimension must be increased to provide the installation area. The downsizing of the installation space has been difficult. In addition, a so-called take-up mechanism is required because a drive chain is used to apply a driving force, which makes it difficult to reduce the floor of the entire apparatus.

  Therefore, the applicant of the present application has developed a transport device that eliminates the need for a drive chain, eliminates the need for a drive chain take-up device, and further reduces the overall height of the transport device ( Patent Document 2).

Noto 3086461 gazette JP 2007-126268 A

  The traveling body in the above technology is composed of a traveling body portion having wheels and a traveling body connecting portion connected to the traveling body portion without having wheels, and sequentially connecting the traveling bodies having the above-described configuration. Since the traveling body is arranged around the entire circumference of the annular transport rail, there is a traveling body connecting portion between the adjacent traveling main body portions (that is, the portion having the transport tray). The distance between the traveling main body portions was adjusted by the length of the traveling body connecting portion. And when a traveling body connection part moves in the range where the conveyance rail was formed in the shape of an arc, the state in which the traveling body connection part becomes a string with respect to the arc of the conveyance rail is caused, The traveling body connecting portion is positioned linearly with respect to the curvilinear distance, and is in a state of straddling a curved range longer than the actual length dimension of the traveling body connecting portion. As a result, depending on the position of the traveling body, the length of the entire traveling body connected to the actual circumference of the annular transport rail varies. Therefore, one of the connecting ends is formed as a long hole, and the connecting end is slidable in the length direction to absorb the change in the length.

  However, when it is necessary to widen the distance between the traveling main body portions (that is, when a relatively large workpiece is to be transported), the length dimension of the traveling body connecting portion has to be long. As described above, when the traveling body connecting portion is designed to be long, the change in the length as described above is large, and it is necessary to configure the long hole to be relatively long. That is, it was one of the factors that hindered the smooth conveyance of the workpiece.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to enable smooth annular conveyance and to eliminate maintenance such as take-up for a traveling body arranged in an annular shape. An annular conveying device is provided.

  In view of this, the present invention provides an annular transport rail having an endless edge in the transport path, a traveling body having a predetermined length that moves along the transport rail, and a partial surface of the transport rail provided on the traveling body. A rolling wheel and a connecting body having a predetermined length that is connected to the traveling body and disposed between the front and rear traveling bodies, and the traveling body and the connecting body are alternately connected to form the annular transport rail. A connecting member that can project outward from both ends in the longitudinal direction of the connecting body, and of the connecting members, an area located outside the connecting body. Provided with a long hole portion provided, a through hole provided in the vicinity of an end of the traveling body, a connecting shaft capable of simultaneously inserting the long hole portion of the connection member and the through hole of the traveling body, Arbitrary traveling body among a plurality of traveling bodies arranged on the entire circumference of the annular conveyance rail Is for the conveyance tray for mounting a workpiece, characterized in that is provided with a post for supporting the carrier tray.

  According to the above configuration, a plurality of traveling bodies can be coupled by the coupling body, and a transport tray is not provided for all of the traveling bodies, so the length of the coupling body can be increased regardless of the size of the workpiece. There is no need to change, and the length of the coupling body can be made relatively short. Moreover, since the traveling body is provided with wheels regardless of the presence or absence of the transport tray, the wheels can move along the transport rail. Even in the range in which the transport rail is formed in an arc shape, the entire row of travel bodies connected by the connecting body (travel body row) can move in a shape approximate to the transport rail. Thereby, the change of the full length of a traveling body row | line can be made small by the position of a traveling body, and the adjustment range for absorbing the change can be made small. In addition, although a connection member is provided in a coupling body, this connection member can be replaced | exchanged by making this detachable, and when changing the space | interval of traveling bodies, it respond | corresponds by replacement | exchange of a connection member. It becomes possible.

  Moreover, this invention is an annular conveyance apparatus of the said structure, Comprising: The said connection member is a connection member fixed to the said connection body in the state which can contact | abut on the upper surface of the said traveling body, The said connection shaft is The connecting shaft has a head having an upper end whose diameter is larger than that of the connecting shaft main body.

  According to the above configuration, the connecting shaft can be inserted from above the connecting member, and at this time, the insertion of the connecting shaft can be completed with the head of the connecting member reaching the upper surface of the connecting member. . At this time, most of the connecting shaft is accommodated in the through hole of the traveling body, and the position of the connecting shaft is fixed, so that the connecting member is relative to the fixed shaft within the range of the long hole portion. It is possible to change the general position. In particular, the position of the connecting member can be easily changed by interposing a washer between the head of the connecting member and the surface of the connecting member.

  Furthermore, the present invention is the annular transport device having the above-described configuration, wherein a substantially dish-shaped oil reservoir having a predetermined capacity is interposed between the surface of the connection member and the head of the coupling shaft, The bottom of the reservoir has a penetrating part that can be inserted through the connecting shaft and that can be slidably contacted with the surface of the main body of the connecting shaft.

  Here, the “substantially dish-shaped” means a container shape having an appropriate depth and a shape having an appropriate bottom surface, and the depth may be made shallower or deeper as necessary.

  According to the above configuration, since the oil reservoir is interposed between the head of the coupling shaft and the upper surface of the connecting member, the lubricating oil is stored in the oil reservoir so that the coupling shaft and the connecting member are Lubricating oil can be supplied to the sliding contact portion. Since the oil reservoir is substantially dish-shaped with a predetermined capacity, it can store liquid lubricating oil and can also hold a lubricant such as grease. In addition, since the through hole provided in the bottom of the oil reservoir can be inserted through the connecting shaft and slidably contacted, the lubricating oil stored in the oil reservoir is lubricated in a slight gap between the through hole and the connecting shaft. The oil penetrates, and the lubricating oil can be supplied to the periphery of the connecting shaft, in particular, to the portion where the long hole portion of the connecting member and the through hole at the end of the traveling body are in sliding contact with the connecting shaft.

  On the other hand, in the said invention which is not provided with an oil reservoir part, you may comprise the said connection member or the said connection shaft, or both with the material which has self-lubricity.

  Here, the self-lubricating property refers to a property of reducing the friction coefficient by a special lubricant added to the synthetic resin, and a material having such a property is referred to as a self-lubricant. An example of such a self-lubricant is MC nylon (registered trademark).

  If it is set as the above structures, supply of lubricating oil can be made unnecessary for at least the sliding contact portion between the connecting member and the connecting shaft. In addition, the connecting member is fixed to the connecting portion. If the connecting member is replaceable, the self-lubricating effect is reduced. Lubricity can be exhibited.

  In each of the above inventions, the total length of the connecting body may be shorter than the total length of the traveling body.

  According to the above configuration, since the connecting body does not have wheels, the connecting body is pulled by the traveling body, and is connected to the traveling body that is connected back and forth regardless of the shape of the transport rail. In this range, it is arranged in a straight line, but when moving in a range where the transport rail is arcuate by shortening its overall length, it deviates from the transport rail in the string direction. The arranged distance can be shortened. Thereby, the change of the length of the whole traveling body row | line | column can be made small by the positional relationship of the traveling body which moves along the conveyance rail formed in an arc shape.

  Further, in each of the above-mentioned inventions, the main body of the traveling body is horizontally long with one surface of a member having a substantially square cross-sectional shape, and the main body of the connecting body has a cross-sectional shape of the traveling body. It is good also as a structure which makes one surface of the member made into the same shape as this main body part become horizontally long while leveling.

  According to the above configuration, since each surface of the traveling body and the connecting body is kept horizontal, by providing the connecting member on the horizontal surface of the connecting body, the protruding portion of the connecting member contacts the horizontal surface of the traveling body. Can be in contact or in close proximity. Thereby, the connection (insertion to a through-hole etc.) by a connection shaft can be made easy. Further, when the cross-sectional shape of both the main body parts is rectangular, the side surfaces of both main body parts are vertical planes, and it is possible to obtain propulsion drive by the friction drive device using the vertical planes. Become.

  According to the present invention, even when the traveling body moves on the arc-shaped transport rail, it is possible to reduce the change in the overall length of the traveling body row when the position of the traveling body is different. Therefore, since the adjustment range for absorbing the change in the length can be reduced, smooth movement of the traveling body can be realized as a whole, and as a result, the annular conveyance can be made smooth. . This is remarkable when the total length of the coupling body is configured to be short. In addition, when the driving force acts on the traveling body row in the pushing direction, the long hole absorbs the portion where the distance between the extruded traveling body or connection body and the immediately preceding traveling body or connection body is shortened. In addition, the traveling direction of the traveling body and the connecting body can be stabilized. Furthermore, when it becomes a state that cannot be absorbed by the long hole, the traveling body and the connecting body are too close to each other, so that the longitudinal direction of both is horned. Since the body and the coupling body are relatively long, the angle can be made gentle. Thus, since the distance between the traveling body and the connecting body does not differ greatly when the driving force acts in the pulling direction or in the pushing direction, a take-up mechanism for the traveling body row is not required. be able to.

  Furthermore, when the main body of the traveling body and the connecting body is configured to have a substantially quadrangular cross-sectional shape, if a friction drive device is employed as the drive device, it is different from an intermittent drive device such as a cylinder mechanism. Propulsive driving is possible, and smoother conveyance can be realized.

  In addition, the structure in which the oil reservoir is provided at the connecting position between the connecting member provided on the connecting body and the traveling body can avoid frequent supply of lubricating oil to the portion where the connecting shaft is in sliding contact, and a member to be corrected By comprising a self-lubricant, supply of lubricating oil can be avoided. Therefore, as a maintenance of the entire apparatus, the management of the lubricating oil can be made unnecessary in addition to the installation of the take-up mechanism.

It is a perspective view which shows the outline of embodiment of this invention. It is explanatory drawing which shows the outline of embodiment of this invention. It is explanatory drawing which shows the connection state of a connection body and a traveling body. It is explanatory drawing which shows the connection state of a connection body and a traveling body. It is explanatory drawing which shows the state of the traveling body in the curved part of a conveyance rail. It is explanatory drawing which shows 2nd embodiment. It is explanatory drawing which shows 2nd embodiment. It is explanatory drawing which shows the modification of embodiment. It is explanatory drawing which shows the modification of embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a connected state of a traveling body and a connecting body in the first embodiment of the present invention. As shown in this figure, the connecting bodies 1 and the traveling bodies 2 are alternately connected to form a traveling body row (the whole in which the traveling bodies are connected in an annular shape) as a whole. The connecting body 1 and the traveling body 2 are connected via connecting members 3 and 4, and are connected by a connecting shaft 5 through which both 1 and 2 are inserted simultaneously.

  The connecting body 1 has a configuration in which a cylindrical body having a predetermined length (a cylindrical body having a rectangular cross-sectional shape in the figure) is turned sideways, and connection members 3 and 4 are partially provided at both ends of the connecting body 1. It is provided to be detachable while protruding. That is, the connection members 3 and 4 are such that the base end portions 31 and 41 are fastened to the upper surface 11 of the connecting body 1 by bolts, and the distal end portions 32 and 42 protrude outward from the connecting body 1. Is provided. Further, in the connecting members 3 and 4, long hole portions 33 and 43 are formed in regions projecting from the connecting body 1 so that the connecting shaft 5 can be inserted. The long holes 33 and 34 have the same diameter as that of the connecting shaft 5 on the short side, 1.1 to 1.2 times the long side, and are inserted into the traveling body 2 to be fixed. 10% to 20% of a movable region is provided only on the long side in a state where the connecting shaft 5 erected in the state is inserted through the long hole portions 33 and 34. However, the rotation with respect to the connecting shaft 5 is free.

  The traveling body 2 has a structure in which a rod-shaped body having a predetermined length (a prismatic body having a quadrangular cross section in the figure) is turned sideways, and wheels 21 and 22 are provided at lower portions of both ends. Further, in the vicinity of both ends of the traveling body 2, there are through holes 23, 24 penetrating in the vertical direction, and the connecting shaft 5 coaxial with the long hole portions 33, 43 of the connecting body 1 can be inserted. It is like that.

  Note that a plurality of the traveling bodies 2 having the above-described configuration are connected to each other, and a transport tray 6 and a support column 7 that supports the transport tray 6 are provided in any of the plurality of traveling bodies 2. It has been. The support column 7 is fixed to the main body portion of the traveling body 2 with a bolt, and moves the transport tray 6 as the traveling body 2 moves. Further, the transport tray 6 is mounted at the tip of the support column 7 with an appropriate shape and an appropriate size depending on the shape of the work to be transported. Although the name tray is used, it does not mean only a container, but one that can be loaded with workpieces widely.

  Therefore, when the work to be transported is a small one, it is possible to connect all the traveling bodies 2 with the transport tray 6 and the support column 7, and when the work is a large one One or two traveling bodies 8 that do not include the transport tray 6 and the support column 7 can be connected in the middle.

  The wheels 21 and 22 of the traveling body 2 are provided at both ends of two horizontal axes orthogonal to the longitudinal direction of the main body 20 of the traveling body 2 so as to be rotatable about the horizontal axis. It can roll on the surface of the transport rail L on both sides of the main body 20. The conveyance rail L is configured by two rail-shaped members L1 and L2 having a U-shaped cross section, and the two rail-shaped members L1 and L2 are arranged at predetermined intervals while facing each edge. . Accordingly, the wheels 21 and 22 of the traveling body 2 can roll on the inner bottom surfaces of the rail constituent members L1 and L2. Thus, the wheels 21 and 22 of the traveling body 2 roll on the transport rail L inside. The traveling body 2 can move along the transport rail L by moving.

  The connecting body 1 and the traveling body 2 configured as described above are connected by the connecting shaft 5 with the connection members 3 and 4 interposed therebetween, thereby forming a traveling body row along the entire circumference of the annularly formed transport rail L. It can be made. This state is shown in FIG.

  As shown in this figure, the conveyance rail L has a straight portion ST and a curved portion CV mixed depending on the direction and distance to be conveyed. And in the curved part CV, the number of the coupling bodies 1 or the traveling bodies 2 required in order to pass through the said curved part CV differs according to the curvature. Further, the distance between the two when passing through the straight portion ST and the distance between the two when passing through the curved portion CV are different. Accordingly, the total number of the connecting bodies 1 and the traveling bodies 2 arranged on the entire transport rail L does not change, and when the number passing through the straight portion ST and the number of curved portions CV are different, the total length of the traveling body row is It will be different, and the difference in the total length must be resolved. Further, when the connecting body 1 or the traveling body 2 moves from the straight line portion ST to the curved portion CV, or vice versa, the speed of the connecting body 1 or the traveling body 2 in both portions ST and CV is as follows. The distance between the two will change even if this speed changes.

  Therefore, the change in the distance between the connecting body 1 and the traveling body 2 as described above is adjusted by the elongated holes 33 and 43 of the connecting members 3 and 4. That is, as shown in FIG. 3, when passing through the straight line portion ST of the transport rail L, the connecting body 1 and the traveling body 2 move at substantially equal intervals, and a tensile force acts in the traveling direction. When this is done, the distance between the two is maximized, so that the connecting shaft 5 inserted through the long hole portions 33 and 43 of the connecting members 3 and 4 is positioned on the outermost side (separated state) of the long hole portions 33 and 43. It becomes.

  On the other hand, as shown in FIG. 4, when passing through the curved portion CV, the connecting body 1 and the traveling body 2 are connected by a difference in speed or by applying a driving force from the rear in the traveling direction. The interval between the body 1 and the traveling body 2 is reduced. At this time, the connecting shaft 5 is located at an intermediate position or the innermost side (approaching state) of the long hole portions 33 and 34 of the connecting members 3 and 4.

  As described above, by adjusting the distance between the connecting body 1 and the traveling body 2 at each connecting portion, the distance between the two should be changed depending on the position where the driving force is applied, the curvature of the transport rail L, or the like. Sequential intervals can be adjusted according to the situation.

  Here, the connecting body 1 in the present embodiment is shorter than the traveling body 2 (see FIGS. 2 to 4). Thus, by making the length of the connecting body 1 shorter than the traveling body 2, the connecting body 1 can be made to function exclusively as an interval adjustment.

  That is, as shown in FIG. 5, when the connecting body 1 is long (or when only the long traveling body 2 is used), the long connecting body 1 is connected to the curved portion CV of the transport rail L. Therefore, the length of the traveling body row becomes shorter than the actual length of the transport rail L (FIG. 5A). On the other hand, by using the short connecting body 1, at least in the position where the connecting body 1 exists, the deviation from the curvature of the curved portion CV is reduced, and the actual length of the transport rail L is reduced. The amount of shortening of the length of the traveling body row is reduced (FIG. 5B). Therefore, since the connecting body 1 is short, deviation from the transport rail L when passing through the curved portion CV of the transport rail L is suppressed, and the connected body existing in the straight portion ST and the curved portion CV. Depending on the number of one or two traveling bodies 2, the length of the entire length of the traveling body row can be reduced.

  Since the present embodiment is configured as described above, it can easily pass through the curved portion CV of the transport rail L, and can cope with a change in the length of the running body row at each connecting portion. Moreover, not only the length of the whole traveling body row | line | column but when the space | interval of the coupling body 1 and the traveling body 2 changes locally, it is extruded from the back from the state which the driving force is acting as a pulling force, for example. Even when the distance between the two changes temporarily, such as when changing to a state that acts as such a force, or when moving from the straight line portion ST of the transport rail L to the curved portion CV, the interval Changes can be adjusted.

  And by adjusting the change of the whole traveling body row | line and a local space | interval, since the whole traveling body row | line | column can move smoothly, annular conveyance can be performed smoothly. Accordingly, even when a driving force is applied only partially (predetermined position) to the traveling body rows that are continuous in an annular shape, a take-up device for eliminating the slackness of these traveling body rows becomes unnecessary. is there.

  In addition, as shown in FIG. 1, each of the main body portions 10 and 20 of the connecting body 1 and the traveling body 2 in the present embodiment is configured by a quadrangular prism body or a rectangular tube body, and both are cross-sectional shapes. By using the same rectangle, it is possible to apply a driving force by the friction driving device FR (see FIG. 2). The friction drive device is a device that applies the rotational force as a propulsive force by friction transmission by pressing the main body portions 10 and 20 from both sides with two rotating bodies and rotating one drive wheel. By such friction driving, continuous propulsive force can be applied to the traveling body row, so that continuous conveyance is also possible.

  Next, a second embodiment will be described. In the present embodiment, as shown in FIG. 6, a head 151 is formed on the connecting shaft 105. The head portion 151 of the connecting shaft 105 is configured to have a larger diameter than the main body portion 152 of the connecting shaft 105 and is originally intended to prevent the connecting shaft 105 from falling off. By forming, the back surface side of the head 151 can be brought into sliding contact with the surface of the connection member 3.

  In this case, as shown in FIG. 7, the connecting member 3 is interposed between the upper surface of the traveling body 2 and the head 151 of the connecting shaft 105, and the upper surface of the traveling body 2 and the back surface of the head 151 are disposed. The connection member 3 is slidably contacted with both. Therefore, since the connecting member 3 can slide while being in contact with both surfaces, the connecting member 3 can move in the horizontal direction. The movement of the connecting member 3 makes it possible to adjust the distance between the connecting body 1 and the traveling body 2, and within the allowable range of movement due to the length of the long hole portion 33 on the long side, The position can be changed.

  In addition, by making the outer diameter of the head 151 larger than the inner diameter on the short side of the long hole portion 33 of the connecting member 3, the long hole portion 33 will not fall out of the head 151. Further, if the main body 152 of the connecting shaft 105 has the same diameter as the through hole 24 of the traveling body 2, the position of the connecting shaft 105 is fixed, and the connecting member 3 has a long hole portion around the connecting shaft 105. It becomes possible to slide only on the long side of 33. The connecting shaft 105 can be fixedly mounted by setting the fitting tolerance between the through hole 24 and the connecting shaft main body 152 at this time to be an intermediate fit or a tight fit. Further, by providing a pin hole 153 at the tip (lower end) of the main body 152 of the connecting shaft 105, inserting the main body 152 into the through hole 24 of the traveling body 2, and then inserting a fixing pin 154 into the pin hole 153. Further, it may be configured to prevent pulling out (see FIG. 6).

  In the present embodiment, as shown in FIG. 8, the washer 108 may be interposed between the connection member 103 and the head 151 of the coupling shaft 105. In this case, the connecting member 3 does not slide directly on the head 151 of the connecting shaft 105, and the head 151 regulates the vertical movement via the washer 108. In this case, since the washer 108 is in sliding contact with the surface of the connecting member 3, even if the connecting shaft 105 is firmly inserted and the head 151 comes into close contact with the washer 108, the connecting member 3 is slid due to the presence of the washer 108. It becomes possible to move. That is, the connecting member 3 is rotatable around the connecting shaft 105, and the long hole 33 can be slid in the longitudinal direction.

  If it is such a structure, it will also become possible to comprise the connecting shaft 105 with a volt | bolt. That is, the connecting shaft 105 can be screwed into the through hole 24 by engraving a female screw in the through hole 24 of the traveling body 2. In this case, the connecting shaft 105 is firmly fixed, but the connecting member 3 can be slid by interposing the washer 108 between the bolt head 151 and the surface of the connecting member 3. It can be done.

  Furthermore, as a modification of the present embodiment, there is a form in which an oil reservoir 109 is interposed instead of the washer 108 described above. This modification is shown in FIG. As shown in this figure, in this embodiment, an oil reservoir 109 is interposed between the head 151 of the connecting shaft 105 and the connecting member 3. The oil reservoir 109 is generally formed in a dish shape and has an appropriate depth. That is, the bottom surface of the bottom portion 191 is a smooth flat surface, the bottom surface of the bottom portion 191 can be slidably contacted with the upper surface of the connection member 3, and a side surface portion 192 is provided. Depending on the height of the container, an appropriate capacity as a container is provided. In addition, liquids, such as lubricating oil, can be stored by providing a capacity | capacitance suitably as mentioned above. The height dimension of the side surface portion 192 is determined by the amount of lubricating oil to be supplied, and is configured to be low if the amount is small (shallow as a whole of the oil reservoir 109) and high if the amount is large (oil reservoir portion). 109 as a whole).

  Further, a through hole 193 is provided in the bottom 191 of the oil reservoir 109 so that the connecting shaft 105 can be inserted. Unlike the washer 108 (FIG. 8), the through-hole 193 is not capable of gently inserting the connecting shaft 105, and is slidable on the surface of the main body 152 of the connecting shaft 105. That is, the inner diameter of the through hole 193 is provided to be the same as the outer diameter of the main body 152 of the connecting shaft 105. In this case, it is desirable that the fitting tolerance is a clearance fitting tolerance. In other words, the oil reservoir 109 can be slidably contacted with the surface of the main body portion 152 of the connecting shaft 105 by providing a contact surface that is gently brought into contact with each other by fitting tolerance without providing a gap that allows play between the two. . Moreover, due to such a fitting state, the liquid such as the lubricating oil stored in the oil reservoir 109 flows down the main body 152 of the connecting shaft 105 so as to soak into a slight gap, and directly below the oil reservoir 109. It can supply to the long hole part 33 of the connection member 3 which exists in this.

  By setting it as such a form, lubricating oil can be supplied between the connecting shaft 105 and the long hole part 33 which contact most frequently. In particular, since a small amount of lubricating oil can be continuously supplied for a long period of time, frequent lubrication is required even when the traveling body 2 is continuously moved (the entire conveying device is continuously operated). The trouble of supplying oil is eliminated, and it is sufficient to periodically check the remaining amount of the lubricating oil stored in the oil reservoir 109 and add the lubricating oil to the oil reservoir 109 when the remaining amount decreases. Become.

  Thereby, it can be released from frequent maintenance and can be made maintenance-free to some extent. As a means for making it maintenance-free, in the above-described embodiment, the connecting member or the connecting shaft or both of them are made of a self-lubricating material without using a washer or an oil reservoir. May be. That is, since the connection member 3 (especially the long hole portion 33) and the connecting shaft 5 are frequently contacted (frictioned) in adjusting the distance between the connecting body 1 and the traveling body 2, one or both of them are required. This is because if it has self-lubricating properties, it is possible to reduce the frictional resistance.

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

  For example, the wheels 21 and 22 provided on the traveling body 2 may have a configuration in which a rolling member is pivotally supported by a horizontal shaft, but the horizontal shaft that pivotally supports the rolling member penetrates the main body portion 20 of the traveling body 2. It is good also as a structure supported with a volt | bolt. In this case, the horizontal shaft is provided by a through-bolt so as to be rotatable around its axis, so that the wheels 21 and 22 are rotated around the axis of the through-bolt even in the range where the transport rail L is curved. It can roll in the direction along the curve of the transport rail L. That is, when the conveyance rail L is curved, the direction of the main body portion 20 of the traveling body 2 is in a cornered state with respect to the tangent line of the conveyance rail L at the ground contact position of the wheels 21 and 22 ( In this case as well, in this case, the wheels 21 and 22 can roll in a direction different from the direction of the main body portion 20, and the wheels 21 and 22 can roll in a state where the resistance force is reduced. It is possible to make it.

DESCRIPTION OF SYMBOLS 1 Connection body 2 Traveling body 3, 4 Connection member 5,105 Connection axis | shaft 6 Carrying tray 7 Support | pillar 10 Main part 20 of a connection body Main body part 21,22 of a traveling body Wheel 31,41 Base end part 32,42 of a connection member Connection Member end portions 33, 43 Long hole portion 108 Washer 109 Oil reservoir 151 Head portion 152 of connecting shaft Main portion 153 of connecting shaft Pin hole 154 Fixing pin 191 Bottom portion 192 of oil reservoir portion Side surface portion 193 of oil reservoir portion Oil reservoir Through-hole L of the part Transport rail ST Straight part CV of the transport rail Curved part of the transport rail

Claims (6)

An annular conveyance rail that forms an endless edge of the conveyance path, a traveling body having a predetermined length that moves along the conveyance rail, a wheel that is provided on the traveling body and rolls on a part of the surface of the conveyance rail, A connecting body of a predetermined length connected to the traveling body and disposed between the preceding and following traveling bodies, and the traveling body and the connecting body are alternately connected and arranged on the entire circumference of the annular transport rail. A connecting member that can project outward from both ends in the longitudinal direction of the connecting body, and a long hole provided in a region of the connecting member located outside the connecting body. And a through hole provided in the vicinity of the end of the traveling body, a connecting shaft through which the elongated hole portion of the connecting member and the through hole of the traveling body can be simultaneously inserted, and the entire annular transport rail Work is mounted on any traveling body among multiple traveling bodies arranged around the circumference. A transport tray that an annular conveying apparatus characterized by being provided with a post for supporting the carrier tray. 2. The annular transport device according to claim 1, wherein the connection member is a connection member that is fixed to the connection body so as to be in contact with an upper surface of the traveling body, and the connection shaft has an upper end thereof. A connecting shaft having a head having a diameter larger than that of the connecting shaft main body. The annular conveying device according to claim 2, wherein a substantially dish-shaped oil reservoir having a predetermined capacity is interposed between a surface of the connection member and a head of the connecting shaft, and the oil reservoir The annular conveying device according to claim 2, wherein the bottom portion has a penetrating portion that can be inserted through the connecting shaft and can be slidably contacted with a surface of a main body portion of the connecting shaft. The annular conveying device according to claim 1 or 2, wherein the connecting member and / or the connecting shaft is made of a self-lubricating material. The annular conveying device according to any one of claims 1 to 4, wherein a total length of the coupling body is shorter than a total length of the traveling body. The main body of the traveling body is horizontally long with one surface of a member having a substantially quadrangular cross-sectional shape, and the main body of the connecting body has the same cross-sectional shape as the main body of the traveling body. 6. The annular conveying device according to claim 1, wherein one surface of the member is horizontally long while being horizontal.

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