JP2008183916A - Friction drive type carriage conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction drive type carriage conveyor capable of reducing the required number of the carriage drive devices on a horizontal curve-like route and reducing a pivot stroke of a roller for friction drive. <P>SOLUTION: The friction drive type carriage conveyor is provided with a front pivot arm 9 forwardly extending to the front end of the carriage 1 while having a rear end supported to a vertical support shaft 11 at the front side of the inner end of the carriage 1, inwardly pivotable around the vertical support shaft 11 and provided with a guide roller 134 at the lower side of the front end; and a rear pivot arm 10 rearwardly extending to the rear end of the carriage 1 while having a front end supported to a vertical support shaft 12 at a rear side, inwardly pivotable around the vertical support shaft 12 and provided with a rear guide roller 14 at the lower side of the rear end. A guide rail 15 engaged with the front guide roller 13 and the rear guide roller 14 is installed at an inner side than a traveling rail of the horizontal curve-like route, and inner surfaces 9a, 10a of the pivot arms 9, 10 are made to be carriage drive surfaces. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a friction-driven trolley conveyor that transports a trolley along a transport path including a horizontal curved path.

  Friction-driven trolley conveyor is a non-self-propelled trolley that can move along the transport path formed by the traveling rail, and can swing to contact the trolley drive surface that is formed over almost the entire length of the side surface in the transport direction of the trolley. And a carriage driving device equipped with a friction drive roller. The carriage is placed on the carriage and conveyed, and a plurality of locations inside the horizontal curved path section (turn path section) Friction drive rollers are arranged corresponding to the position of the carriage drive surface (friction surface), and each friction drive roller is supported so as to be movable in the perspective direction with respect to the path center line of the horizontal curved path portion, and by the biasing means By energizing the path center line side and by causing each of these friction drive rollers to act on the cart drive surface in turn, the cart is continuously propelled over the entire length of the horizontal curved path section (for example, (See Patent Document 1.), a central bar attached parallel to the traveling direction at the center position in the lateral width direction of the carrier bed of the carriage, and a vertical axis around each of the front and rear ends of the central bar via connecting means. The front and rear ends of the central rod-like body, the front-side lower end of the front-side rod-like body, and the rear side are provided. A trolley is attached to the lower side of the rear end of the rod-shaped body and engaged with the trolley guide rail. In the horizontal curved path portion (curve traveling path), a cart driving surface (sub-surface) formed on the side surface of the friction drive rod-shaped assembly There is a type in which a friction driving roller (friction driving wheel) of the auxiliary propulsion driving means is brought into pressure contact with the driving friction surface to propel the carriage (for example, see Patent Document 2).

Japanese Patent Laying-Open No. 2005-81951 (FIGS. 4 and 6-8) Japanese Patent Laid-Open No. 2002-240707 (FIGS. 1-4 and 8-10)

  In the configuration of Patent Document 1, since the cart driving surface of the cart that is traveling along the horizontal curved path portion greatly protrudes inward in the curvature radius direction of the horizontal curved path portion, the friction driving for pressure contact with the cart driving surface is performed. It is necessary to increase the swing stroke of the roller, and the number of cart driving devices provided in the horizontal curved path portion is increased. Therefore, the cost of the rocking mechanism of the friction drive roller in the cart driving device provided in the horizontal curved path portion increases.

  In the configuration of Patent Document 2, a pair of left and right trolley guide rails that are continuously laid at an intermediate position between the left and right guide rails are provided in addition to the front and rear, left and right universal wheels that run on the left and right guide rails. The rail is configured to engage the trolley attached to the lower side of the front and rear ends of the central bar, the lower side of the front end of the front bar and the lower side of the rear end of the rear bar. Cost, because the structure of the bar, the connecting means and the trolley, the trolley guide rail, etc. under the loading platform is complicated. Will increase. Further, it is difficult to check the rod-like body, the connecting means and the trolley on the lower side of the loading platform. Furthermore, since the cart driving surface in the horizontal curved path portion is below the loading platform, and it is necessary to install the secondary propulsion driving device under the loading platform while avoiding interference with the cart, In some cases, it is difficult to install, and it is difficult to check the auxiliary propulsion driving means unless the carriage is dismissed.

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that the required number of cart drive devices can be reduced and the swing stroke of the friction drive roller can be reduced in the horizontal curved path portion. It is possible to provide a friction-driven carriage conveyor that can easily inspect the carriage drive device including the carriage drive surface of the horizontal curved path portion and the friction drive roller, and can reduce costs.

  In order to solve the above-described problem, the friction-driven cart conveyor according to the present invention includes a plurality of cart driving devices having friction driving rollers arranged along the transport path, and travels on a travel rail that forms the transport path. A friction-driven carriage conveyor that conveys the carriage by pressing the friction drive roller against a carriage drive surface that is a side surface that extends in the conveyance direction of the non-self-propelled carriage. A front guide supported at the rear end by a vertical support shaft located in front of the center and extending forward to the front end portion of the carriage, swinging inwardly around the support shaft, and rotatable about the vertical shaft A roller is provided on the lower side of the front end portion of the front swing arm and a vertical support shaft located on the rear side of the center in the front-rear direction and the front end is supported to extend rearward to the rear end portion of the carriage. Can swing inward Both of the front guide roller and the rear guide are provided on the inner side of the traveling rail of the horizontal curved path portion with a rear swinging roller provided with a rear guide roller that is rotatable about the vertical axis below the rear end. By installing a guide rail with which the roller is engaged, the inner side surface of the front and rear swing arms swinging inward from the inner end of the cart traveling along the horizontal curved path portion is used as a cart driving surface. .

  Here, it is preferable to provide holding means for holding the front and rear swing arms in a state of extending in the front-rear direction along the inner end of the carriage while the carriage travels along the straight path portion.

  Further, it is preferable to provide elastic urging means for urging the front and rear swing arms so as to extend in the front-rear direction along the inner end of the carriage.

  Further, the inner side surface of the front and rear swing arms is positioned above or below the inner side surface extending in the conveying direction of the carriage, and the inner side surface between the front and rear vertical support shafts and the inner side surface of the front and rear swing arms It is preferable that the carriage is a carriage driving surface when the carriage travels along a horizontal curved path portion, and the lower or upper portion of the inner side surface is a carriage driving surface when the carriage travels along the straight path portion.

  According to the friction drive carriage conveyor according to the present invention, a plurality of carriage drive devices having friction drive rollers are arranged along the conveyance path, and the non-self-propelled carriage travels on the traveling rail that forms the conveyance path. A friction drive type carriage conveyor that conveys the carriage by pressing the friction drive roller against a carriage drive surface that is a side surface that extends in the conveyance direction of the carriage, at the inner end of the carriage, more forward than the center in the front-rear direction. A front guide roller is supported by a vertical support shaft that is positioned at the rear end and extends forward to the front end of the carriage, can swing inwardly around the support shaft, and can rotate about the vertical shaft. The front swinging arm provided on the front and the vertical support shaft located on the rear side of the center in the front-rear direction are supported at the front end and extend rearward to the rear end of the carriage, and can swing inwardly around the support shaft. And the vertical axis Instead, a rotatable rear guide roller is provided with a rear swing arm provided on the lower side of the rear end portion, and the front guide roller and the rear guide roller engage with each other on the inner side of the traveling rail of the horizontal curved path portion. By installing the guide rail, the inner side surface of the front and rear swing arms swinging inward from the inner end of the cart traveling on the horizontal curved path portion becomes the cart driving surface. When the carriage travels, the inner side surface of the carriage between the front and rear vertical support shafts, the inner side surface of the front swing arm, and the inner side surface of the rear swing arm serve as the cart drive surface. Therefore, it is possible to reduce the swing stroke of the friction drive roller pressed against these cart drive surfaces. Therefore, the cost of the rocking mechanism for the friction drive roller can be reduced. In addition, since the carriage can be driven only by disposing the carriage driving device at two positions in the front and rear positions of the horizontal curved path portion, the number of the carriage driving devices is reduced, and such two places are provided. In the configuration in which the carriage driving device is provided only for the above, the swing stroke of the friction driving roller can be further reduced, and therefore the cost can be further reduced. Furthermore, since the front and rear swing arms are located at the inner end of the carriage, and the carriage drive device is installed inside the inner end, inspection of these carriage drive devices and the front and rear swing arms and guide rollers are provided. Can be easily checked.

  The front and rear swing arms may be provided in a state of extending in the front-rear direction along the inner end of the carriage while the carriage travels along the straight path portion, or the front and rear If elastic urging means is provided to urge the swing arm so as to extend in the front-rear direction along the inner end of the carriage, in addition to the above effects, the guide rail can be connected to the horizontal curved path portion and its front and rear. Since it is not necessary to install guide rails in most of the straight path portion, the cost can be further reduced.

  Further, the inner side surface of the front and rear swing arms is positioned above or below the inner side surface extending in the conveying direction of the carriage, and the inner side surface between the front and rear vertical support shafts and the inner side surface of the front and rear swing arms If the carriage is a carriage drive surface when traveling on a horizontal curved path portion, and the lower or upper portion of the inner side surface is a carriage drive surface when the carriage travels on a straight path portion, in addition to the above effects, friction It is possible to more stably carry out the carriage drive in the straight path performed by pressing the drive roller against the carriage drive surface. In addition, for example, in the case of adopting a configuration in which a plurality of carriage groups are driven and driven by one carriage drive device in the linear path portion, the friction drive roller of the one carriage drive device is arranged on the upper side of the inner side surface of the carriage and If the thickness extends over the lower cart driving surface, a sufficiently large propulsive force can be applied to the cart, so that more stable and reliable driving can be performed.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste. In the present specification, the front, rear, left and right in the state of facing the transport direction of the carriage (see arrow A in the figure) in the transport path formed by the traveling rails are referred to as front, rear, left, and right. Further, the inside of the horizontal curved path portion in the radius direction of curvature is referred to as the inside, and the outside of the horizontal curved path portion in the direction of curvature radius is referred to as the outside.

  1 to 4 are schematic views showing the configuration and operation of a friction-driven trolley conveyor according to an embodiment of the present invention, and FIG. 1 shows a state (P1) before the trolley reaches a horizontal curved path portion. 2 is a rear view, FIG. 3A is a plan view showing a state (P2) in which the carriage further advances from P1 and reaches the horizontal curved path portion, and FIG. 3B is P2. 4 (a) is a plan view showing a state in which the carriage further advances from P3 (P4), and FIG. 4 (b) is a plan view in which the carriage further advances from P4. It is a top view which shows a state (P5).

  As shown in FIGS. 1 and 2, the conveyance path including the horizontal curved path portion is formed by inner and outer traveling rails 3 and 4 laid on the floor surface FL (see FIG. 2). The non-self-propelled carriage 1 in which the substantially entire length of the right side surface (inner side surface) 1a and the left side surface (outer side surface) 1b extending in the conveying direction is a cart drive surface is a friction drive roller 8,. (Refer to the arrow B in FIG. 1 for the rotation direction of the friction drive roller 8) and conveyed along the conveying path (refer to the arrow A in FIG. 1 for the conveying direction). The cart driving devices 2,... Rotate the friction driving roller 8 at a predetermined rotational speed by a rotation driving device including a motor with a reduction gear (not shown), and the friction driving roller 8 is a spring or an air cylinder (not shown). The urging means urges the friction drive roller 8 against the inner side surface 1a in a state where the friction drive roller 8 is in contact with the inner side surface 1a. .

  The traveling wheels 5, 5, 6 and 6 that are attached to the lower surface of the carriage 1 and roll on the traveling rails 3 and 4 are engaged with the traveling rails 3 and 4, and the carriage 1 has a horizontal curved path portion. For example, a wheel with a caster that can rotate around a vertical axis is used. In addition, the carriage 1 is caused to travel along a predetermined route, and the traveling wheels 5 and 5 are not lifted from the inner traveling rail 3 even when a force directed from the inside to the outside acts on the carriage 1 by the carriage driving device 2. The engagement between the traveling wheels 5 and 5 and the traveling rail 3 is held by the side rollers 7. The traveling rail 4 is formed wide as shown in FIG. 1 and the traveling wheels 6 and 6 without casters are configured to roll on the traveling rail 4 without engaging with the traveling rail 4. Simplification of the configuration of the friction-driven carriage conveyor can be achieved.

  As shown in FIGS. 1 and 2, the right end (inner end) of the carriage 1 is supported by a vertical support shaft 11 located on the front side of the center in the front-rear direction and the front end of the carriage 1 is moved forward. A front swinging arm 9 that extends and swings to the right (inside) around the vertical support shaft 11 and that can rotate about the vertical shaft is provided on the lower side of the front end, and from the center in the front-rear direction. The rear end is supported by the vertical support shaft 12 located on the rear side, extends rearward to the rear end portion of the carriage 1, can swing inward around the vertical support shaft 12, and can rotate about the vertical shaft. A rear swing arm 10 is provided in which a guide roller 14 is provided below the rear end. The lengths of the front swing arm 9 and the rear swing arm 10 are preferably set to approximately 1/3 of the length in the front-rear direction of the carriage 1 (the length in the front-rear direction of the inner side surface 1a). It is an aspect.

  The front and rear swing arms 9, 10 are holding means for holding the swing arms 9, 10 in a state of extending in the front-rear direction along the inner end of the cart 1 while the cart 1 travels along the straight path portion, or Elastic urging means for urging the swinging arms 9 and 10 so as to extend in the front-rear direction along the inner end of the carriage 1 is provided. For example, as the holding means, a configuration in which a permanent magnet and an iron piece (ferromagnetic plate) are attracted and held, or a configuration in which a locking piece is inserted between a pair of rollers that can be opened and closed by a spring, are adopted. As the elastic biasing means, a configuration in which a spiral spring is mounted around the vertical support shafts 11 and 12 can be employed. If such holding means or elastic urging means is used, a guide rail 15 to be described later may be installed only in the horizontal curved path portion and a fixed section before and after that, and guide rails are provided on most of the straight path portion. Since it is not necessary to install, cost reduction can be achieved.

  As shown in FIG. 1, the front guide roller 13 at the front end of the front swing arm 9 and the rear guide roller 14 at the rear end of the rear swing arm 10 are located on the inner side of the traveling rails 3 and 4 of the horizontal curved path portion. The engaging guide rail 15 is located on the floor FL (see FIG. 2) from a predetermined position on the rear side (upstream side) of the horizontal curved path portion to a predetermined position on the front side (downstream side) of the horizontal curved path portion. Will be laid. As shown in FIG. 2, the front and rear guide rollers 13 and 14 are located between the vertical rising surface of the inner guide rail 15 a and the vertical rising surface of the outer guide rail 15 b and move along the guide rail 15. . The right and left side surfaces (inner side surfaces) 9a and 10a of the front and rear swing arms 9 and 10 serve as a cart driving surface in a horizontal curved path portion and a predetermined section in front and rear thereof. That is, in the horizontal curved path portion and the predetermined section before and after the horizontal curved path portion, the inner side surfaces 9a and 10a of the front and rear swing arms 9 and 10 are provided at two positions (inlet side and outlet side) before and after the horizontal curved path portion. The friction drive rollers 8 and 8 of the disposed cart drive devices 2 and 2 are pressed against each other.

  As shown in FIG. 1 and FIG. 2, the linear portion further upstream from the position spaced apart by a predetermined distance L from the inlet (upstream end) of the horizontal curved path portion to the upstream side, and the outlet of the horizontal curved path portion ( The position of the guide rail 15 in the linear portion further downstream from the position separated by a predetermined distance L from the downstream end) to the downstream side is that the swing arms 9 and 10 swing with the center in the left-right direction of the inner traveling rail 3. Instead, the position is offset inward by a distance D from the center of the vertical axis of the guide rollers 13 and 14 of the swing arms 9 and 10 in a state of extending in the front-rear direction parallel to the inner side surface 1a of the carriage 1. Accordingly, the guide rollers 13 and 14 of the swing arms 9 and 10 on the front and rear of the carriage 1 that have traveled along the straight path portion engage with the guide rail 15 on the upstream side of the entrance of the curved path portion. When the carriage 1 passes through the curved path portion, the swing arms 9 and 10 do not swing and extend in the front-rear direction in parallel with the inner side surface 1a of the carriage 1.

  As shown in FIG. 1, the guide rail 15 is located downstream from the outlet (downstream end) of the horizontal curved path portion by a predetermined distance L from the inlet (upstream end) of the horizontal curved path portion to the upstream side. Is located further inside than the position offset inward by the distance D (see the two-dot chain line E1) (see the one-dot chain line E2). That is, the arc portion (one-dot chain line E2) of the guide rail 15 has a radius of curvature larger than the curvature radius R1 (curvature center C1) of the arc portion of the two-dot chain line E1, and the curvature center C2 is greater than the curvature center C1. Is also inside. Therefore, in a state where the guide rollers 13 and 14 of the front and rear swing arms 9 and 10 are engaged with the arc portion (one-dot chain line E2) of the guide rail 15, the swing arms 9 and 10 move the guide rail 15 at one point. It swings further inward than in the case of the chain line E1.

  Next, the operation in the horizontal curved path portion of the friction-driven carriage conveyor configured as described above will be described with reference to FIGS. 1, 3, and 4. In the state (P1) before the carriage 1 shown in FIG. 1 approaches the horizontal curved path portion, the front and rear swing arms 9 and 10 have their inner side surfaces 9a and 10a flat along the inner side surface 1a of the carriage 1. The friction drive roller 8 of the cart drive device 2 on the entrance side of the horizontal curved path portion is in pressure contact with the inner side surface 9 a of the front swing arm 9, and the drive force of the friction drive roller 8 The cart 1 moves forward.

  In this state (P1), when the carriage 1 further advances and the carriage 1 shown in FIG. 3A reaches the horizontal curved path portion (P2), the front guide roller 13 at the front end portion of the front swing arm 9 is obtained. Is engaged with the guide rail 15, the front swing arm 9 swings inward around the vertical support shaft 11 of the carriage 1 as the front guide roller 13 moves along the guide rail 15. To do. In this state (P 2), the friction drive roller 8 of the carriage drive device 2 on the inlet side is pressed against the inner side surface 1 a between the front and rear vertical support shafts 11 and 12, and the carriage 1 is driven by the drive force of the friction drive roller 8. Advance.

  In the state (P3) shown in FIG. 3B in which the carriage 1 further advances from this state (P2), the rear guide roller 14 at the rear end of the rear swing arm 10 is engaged with the guide rail 15. As the rear guide roller 14 moves along the guide rail 15, the rear swing arm 10 swings inward around the vertical support shaft 12 of the carriage 1. In this state (P3), the friction drive roller 8 of the carriage drive device 2 on the inlet side is brought into pressure contact with the inner surface 10a of the rear swing arm 10, and the carriage 1 moves forward by the drive force of the friction drive roller 8.

  In the state (P4) shown in FIG. 4A in which the carriage 1 has further advanced from this state (P3), the friction of the carriage drive device 2 on the outlet side of the horizontal curved path portion on the inner side surface 9a of the front swing arm 9 is shown. The driving roller 8 is pressed against the inner side surface 10a of the rear swing arm 10, and the friction driving roller 8 of the carriage driving device 2 on the inlet side is pressed against the inner surface 10a. Will move forward. In the state (P4) shown in FIG. 4A, the inner side surface 1a of the carriage 1 protrudes inward. In this state (P4), as described above (see also FIG. 1), the guide rail 15 The path is between the position separated by a predetermined distance L from the entrance of the horizontal curved path portion to the upstream side and the position separated by a predetermined distance L from the exit of the horizontal curved path portion to the downstream side, than the two-dot chain line E1. Further, it is an inner one-dot chain line E2, and the inner side surface 1a of the carriage 1 is substantially at the center in the left-right direction of the guide rail 15 (between the vertical rising surface of the inner guide rail 15a and the vertical rising surface of the outer guide rail 15b. ).

  Therefore, in addition to the cart drive devices 2 and 2 on the entrance side and the exit side of the horizontal curve path portion, the cart drive device 2 is disposed on the horizontal curve path portion at an intermediate position between the cart drive devices 2 and 2. Even in the case of the configuration, the inner side surface 1a of the carriage 1, the inner side face 9a of the front swing arm 9, and the inner side face 10a of the rear swing arm 10 between the front and rear vertical support shafts 11 and 12, which are the truck drive surfaces. However, since it does not protrude greatly inward with respect to the guide rail 15, the swing stroke of the friction drive roller 8 of the cart drive device 2 at the intermediate position can be reduced.

  In the state (P5) shown in FIG. 4B in which the carriage 1 has further advanced from the state (P4), the front guide roller 13 of the front swing arm 9 is engaged with the guide rail 15, so that the guide roller As 13 moves along the guide rail 15, the inner side surface 9 a of the front swing arm 9 has returned to the state of overlapping along the inner side surface 1 a of the carriage 1 in plan view, and the rear swing arm 10 Is in a state of swinging inward about the vertical support shaft 12 of the carriage 1. That is, only the rear swing arm 10 swings inward. In this state (P5), the friction drive roller 8 of the cart drive device 2 on the outlet side is pressed against the inner side surface 1a between the front and rear vertical support shafts 11 and 12, and the cart is driven by the driving force of the friction drive roller 8. 1 moves forward.

  When the carriage 1 further advances from this state (P5), the friction drive roller 8 of the outlet side carriage drive device 2 is pressed against the inner surface 10a of the rear swing arm 10, and the carriage is driven by the driving force of the friction drive roller 8. 1 moves forward. In this way, the carriage 1 that has passed through the horizontal curved path portion has the guide roller 14 along the guide rail 15 because the rear guide roller 14 of the rear swing arm 10 is engaged with the guide rail 15. Along with the movement, the inner side surface 10a of the rear swing arm 10 returns to a state where it overlaps in the plan view along the inner side surface 1a of the carriage 1, and the friction of the carriage driving device 2 on the outlet side on the inner side face 10a. The driving roller 8 is brought into pressure contact, and the carriage 1 moves forward by the driving force of the friction driving roller 8.

  With the configuration described above, when the carriage 1 travels along the horizontal curved path portion, the inner side face 1a of the carriage 1 and the inner side face 9a and the rear swing of the front swing arm 9 between the front and rear vertical support shafts 11 and 12 are obtained. Since the inner side surface 10a of the moving arm 10 serves as a cart driving surface, and these cart driving surfaces do not project greatly inward with respect to the guide rails 15, the friction driving roller 8 pressed against these cart driving surfaces is swung. The moving stroke can be reduced. Therefore, the cost of the swing mechanism of the friction drive roller 8 can be reduced. In addition, since the carriage 1 can be driven only by arranging the carriage driving devices 1 and 2 at the two front and rear positions of the horizontal curved path portion, the required number of the carriage driving devices 2,. In addition, in the configuration in which the cart driving devices 2 and 2 are disposed only in such two places, the swing stroke of the frictional driving roller 8 can be further reduced, and therefore the cost can be further reduced. Furthermore, since the front and rear swing arms 9 and 10 are located at the inner end of the carriage 1 and the carriage driving devices 2 and 2 are installed inside the inner end, the carriage driving devices 2 and 2 Inspection and inspection of the swing arms 9 and 10 and the guide rollers 13 and 14 before and after the carriage 1 can be easily performed.

  Further, as shown in FIG. 2, the inner side surfaces 9a, 10a of the front and rear swing arms 9, 10 are positioned below the inner side surface 1a extending in the conveying direction of the carriage 1 (may be an upper portion). The inner side surface 1a between the vertical support shafts 11 and 12 (see FIG. 1) and the inner side surfaces 9a and 10a of the front and rear swing arms 9 and 10 are used as a cart driving surface when the cart 1 travels along the horizontal curved path portion. When the upper part (which may be the lower part) of the inner side surface 1a is used as a carriage driving surface when the carriage 1 travels along the linear path portion, the carriage drive in a linear path performed by pressing the friction drive roller 8 against the carriage driving surface. Can be performed more stably. In addition, for example, in the case of adopting a configuration in which a large number of carriage groups are driven and driven by one carriage drive device 2 in the linear path portion, the friction drive roller 8 of the one carriage drive device 2 is disposed inside the carriage 1. If the thickness extends over the upper and lower cart driving surfaces of the side surface 1a, a sufficiently large propulsive force can be applied to the cart 1, so that more stable and reliable driving can be performed.

  In the above, the lower side (or upper side) of the inner end portion of the carriage 1 is cut out as shown in FIG. 2, and the front and rear swing arms 9 and 10 are accommodated in the cutout portion when traveling on the straight path portion. The case where the inner side surface 1a of 1 and the inner side surfaces 9a, 10a of the swinging arms 9, 10 are flush with each other has been described. However, when the thickness of the carriage is relatively small, for example, FIG. As shown in (b), the rocking arms 9 and 10 may be attached to the lower surface or the upper surface of the inner end portion of the carriage 1 without forming the notch at the inner end portion of the carriage 1. For example, in the case of a floor conveyor, when an operator rides on the carriage, a swing arm is provided at the lower notch of the inner end of the carriage 1 as shown in FIG. 2 in order to avoid interference with the operator. It is preferable to adopt a configuration that accommodates 9, 10 or a configuration in which the swing arms 9, 10 are attached to the lower surface of the carriage 1.

  Further, the friction drive type carriage conveyor according to the present invention is not limited to a floor conveyor. For example, as shown in FIG. 5B, a traveling rail and a guide rail are mounted on a ceiling CL or a support frame above the worker's head. 15 may be an overhead conveyor. Furthermore, in the friction drive type carriage conveyor according to the present invention, the swing arms 9 and 10 attached to the inner end of the carriage 1 are not attached to only one of the left and right as shown in FIG. With this configuration, it is possible to cope with a conveyance route in which a right curve and a left curve are mixed.

It is a schematic plan view which shows the friction drive type trolley | bogie conveyor structure which concerns on embodiment of this invention, and has shown the state (P1) before the trolley | truck approaches a horizontal curve path | route part. It is a back view similarly. Similarly, it is a schematic plan view, (a) shows a state (P2) in which the carriage has reached the horizontal curved path portion, and (b) shows a state in which the carriage has further advanced from P2 (P3). It is also a schematic plan view, and (a) shows a state in which the carriage further advances from P3 (P It is a rear view which shows the example of attachment of the rocking | swiveling arm to a trolley | bogie.

Explanation of symbols

1 Non-self-propelled cart 1a Inner side surface (cart drive surface)
1b Outer side surface (trolley drive surface)
2 cart drive devices 3, 4 travel rails 5, 6 travel wheels 7 side rollers 8 friction drive rollers 9 front swing arm 9 a inner surface (cart drive surface)
10 Rear swing arm 10a Outer side surface (trolley drive surface)
11, 12 Vertical support shaft 13 Front guide roller 14 Rear guide roller 15 Guide rail 15a Inner guide rail 15b Outer guide rail A Transport direction B Rotation direction C1, C2 Curvature center R1, R2 Curvature radius FL Floor surface CL Ceiling

Claims (4)

A plurality of carriage drive devices having friction drive rollers are arranged along the conveyance path, and the carriage drive surface that is a side surface extending in the conveyance direction of the non-self-propelled carriage traveling on the traveling rail that forms the conveyance path is disposed on the carriage drive surface. A friction-driven carriage conveyor that conveys the carriage by pressing a friction drive roller,
At the inner end of the carriage, the rear end is supported by a vertical support shaft located in front of the center in the front-rear direction and extends forward to the front end of the carriage, and can swing inwardly around the support shaft. A front guide roller rotatable around a vertical axis is provided on the lower side of the front end, and a vertical support shaft located on the rear side of the center in the front-rear direction is supported by the front end to the rear end of the carriage. A rear swinging arm extending rearward and swinging inwardly around the support shaft and having a rear guide roller provided on the lower side of the rear end portion, which is rotatable around a vertical axis;
By installing a guide rail that engages the front guide roller and the rear guide roller on the inner side of the traveling rail of the horizontal curved path portion, the inner side of the carriage traveling on the horizontal curved path portion is moved inward. Friction drive type carriage conveyor characterized in that inner side surfaces of said swinging front and rear swing arms are used as a carriage drive surface.   2. The friction drive type carriage according to claim 1, further comprising holding means for holding the front and rear swing arms extending in the front-rear direction along the inner end of the carriage while the carriage travels along a straight path portion. Conveyor.   2. The friction-driven carriage conveyor according to claim 1, further comprising elastic biasing means for biasing the front and rear swing arms so as to extend in the front-rear direction along the inner end of the carriage. The inner side surface of the front and rear swing arms is positioned above or below the inner side surface extending in the transport direction of the carriage, and the inner side surface between the front and rear vertical support shafts and the inner side surface of the front and rear swing arms are The trolley driving surface when the trolley travels along a horizontal curved path portion, and the lower or upper portion of the inner side surface is a trolley driving surface when the trolley travels along the straight path portion. Friction drive trolley conveyor as described.

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