JPH0341382B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a monorail type conveying device in which a tray is supported at two locations in the front and rear by a self-propelled truck and a driven truck guided by one guide rail. It is related to.

(Prior art and its problems) A conventional monorail type conveyor device is configured such that a self-propelled cart and a driven cart are used to suspend trays, hangers, etc. at two places, the front and back. By supporting the tray in two places at the top end, front and back, it is not necessary to position a trolley or guide rail directly above the tray, making it convenient for various operations on the tray, such as loading and unloading cargo onto the tray. becomes.

From this point of view, the upper end of a self-propelled trolley that rides on one guide rail and pivotally supports a drive wheel interlocking with a motor and vertical shaft rollers for preventing falling that sandwich the guide rail from both left and right sides, and A tray-support type monorail that supports the tray at two locations, front and rear, by the upper end of a driven trolley that pivotally supports idle wheels that ride on the guide rail and vertical shaft rollers for preventing falling that sandwich the guide rail from both the left and right sides. Conventionally, such a tray-supported monorail type conveyor has been in demand.
Moreover, no devised device has been devised to allow safe, reliable and smooth running without causing slips even on vertically inclined paths.

That is, in the monorail type conveyance device, each truck has one wheel that rides on the guide rail, so that the conveyance device can be moved from a horizontal path portion to a vertically inclined path portion without adopting a special configuration. It can be run in the opposite direction without any problem. However, compared to traveling on the horizontal route section, slipping occurs between the drive wheels of the self-propelled cart and the guide rail when traveling uphill or downhill on the inclined route section, causing the transport device to run uphill. There is a risk that the vehicle may become disabled or drive out of control by exceeding the safe speed when driving downhill.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention provides one drive wheel that rides on one guide rail and is interlocked with a motor, and the guide rail on both the left and right sides. The upper end of a self-propelled cart is pivotally supported by a vertical axis roller for preventing falling that is sandwiched between the upper end of the self-propelled cart, and an idle wheel that rides on the guide rail and a vertical axis roller for preventing falling that is sandwiching the guide rail from both left and right sides are pivotally supported. The top end of the driven cart supports the tray at two locations, front and back, and only the self-propelled cart is supported at the top end of the cart so as to be swingable back and forth about a horizontal horizontal axis. For this self-propelled truck only, we propose a monorail type conveyance device in which backup horizontal shaft rollers that abut the lower surface of the guide rail are pivotally supported at two locations, front and rear relative to the lower position of the drive wheel.

(Operation of the Invention) When the drive wheels of the self-propelled cart are rotationally driven by a motor, the self-propelled cart receives a rotational force in the traveling direction about the horizontal horizontal axis due to the traction load acting on the upper end of the cart. As a result, of the pair of front and rear backup horizontal axis rollers that come into contact with the lower surface of the guide rail, the roller on the traveling direction side comes into pressure contact with the lower surface of the guide rail, and the drive wheel also comes into pressure contact with the upper surface of the guide rail. Of course, the distance between the pair of front and rear backup horizontal shaft rollers and the lower surface of the guide rail is zero or very small, and moreover, the backup horizontal shaft rollers are disposed at a distance in the front and rear relative to the lower position of the drive wheel. As a result, the self-propelled cart is almost unable to swing back and forth, and there is no risk that the tray will rattle due to the self-propelled cart swinging back and forth when starting or stopping.

As mentioned above, regardless of the rotational direction of the drive wheels (traveling direction of the transport device), due to the traction load acting on the upper end of the self-propelled cart in the opposite direction to the traveling direction,
With the drive wheel and the roller on the traveling direction side of the pair of front and rear backup horizontal axis rollers sandwiching the guide rail from above and below, the entire conveying device is moved to a predetermined position along the guide rail by the rotation of the drive wheel. Drive in the direction of. During running, the traction load acting on the upper end of the self-propelled cart becomes small, so that the driving wheels and the roller on the running direction side of the pair of front and rear backup horizontal shaft rollers grip the guide rail from above and below. The clamping force that can be found becomes smaller.

The clamping force with which the drive wheels of the self-propelled trolley and one of the pair of front and rear horizontal axis rollers for back-up clamp the guide rail from above and below is the force that causes the drive wheels of the self-propelled trolley to clamp the guide rail from above and below. The smaller the distance in the length direction of the guide rail to the point of contact between the horizontal axis roller and the guide rail, the greater the distance. Therefore, when one horizontal shaft roller is disposed below the drive wheel, the clamping force becomes extremely large, and not only does power loss become large, but also the bearing of the drive wheel and the horizontal shaft roller becomes extremely large. Excessive stress concentrates on the parts, reducing the service life.
In the configuration of the present invention, since the pair of front and rear backup horizontal shaft rollers are arranged at an appropriate distance apart, it is possible to prevent the clamping force from becoming unnecessarily large. Of course, when traveling on a horizontal path, even if the clamping force is small, sufficient traction force can be obtained by the load acting perpendicularly to the guide rail from the drive wheels, and slips can be prevented between the drive wheels and the guide rail. There is no danger of it occurring.

However, when the conveyance device travels uphill or downhill on the inclined path portion, the upper end of the self-propelled trolley is placed in the opposite direction to the traveling direction when traveling uphill.
When traveling downhill, a descending force (component of load) that is proportional to the slope of the inclined route is applied in the same direction as the traveling direction, so this descending force causes the self-propelled bogie to move along the horizontal horizontal axis of its upper end. As a result, the roller on the side opposite to the direction in which the descending force is applied of the pair of front and rear horizontal back up rollers and the drive wheel strongly sandwich the guide rail from above and below. become. This clamping force increases as the descending force increases, so as the slope of the inclined path portion increases, the clamping force with which the drive wheels and the backup horizontal shaft roller clamp the guide rail also increases. Therefore, in the inclined path portion, even if the pressing force (load component) acting perpendicularly from the drive wheels to the guide rail becomes small, the frictional force between the drive wheels and the guide rail is reduced due to the clamping force. Since the size is significantly large, the conveying device can be reliably run uphill or downhill at a predetermined speed without causing the drive wheels to slip even on an inclined route.

If the backup horizontal axis roller is disposed only at one location below the drive wheel, for the reason stated above, the drive wheel and the backup horizontal axis roller will sandwich the guide rail. The clamping force applied to the vehicle becomes significantly large due to the descending force acting on the inclined path portion, which also causes the inconvenience described above. When installing a pair of horizontal backup rollers, the distance between the horizontal backup rollers should be set appropriately to ensure that the clamping force between the drive wheels and the backup horizontal rollers is sufficient to sandwich the guide rail. It can be configured to have a necessary and appropriate size for the inclined path portion.

In addition, since the driven truck is fixed to the tray in the front-rear direction, the posture of the tray becomes more stable and , the structure of the entire conveying device is also simplified.

Note that when the conveyance device travels on a vertically curved path section between the horizontal path section and the inclined path section,
The self-propelled truck swings around a horizontal horizontal axis that supports the upper end of the truck by the action of the pair of front and rear backup horizontal axis rollers, so that an imaginary line passing through the horizontal horizontal axis and the drive wheel is formed. It runs smoothly while automatically changing its attitude with respect to the tray so that it is approximately perpendicular to the guide rail.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

Reference numeral 1 denotes one guide rail, which is composed of a rectangular pipe-shaped main body 2, and an upper rail member 3 and a lower rail member 4 attached above and below this main body 2. 5 is a self-propelled truck, and 6 is a driven truck.

The self-propelled truck 5 includes a vertically elongated machine frame 7 located on one side of the guide rail 1, a reducer 8 attached to the upper end of the machine frame 7, and an output shaft of the reducer 8. A flange-equipped drive wheel 9 that rides on the upper rail member 3 of the guide rail 1, and a drive wheel 9 that is attached to the driven truck 6 side of the reducer 8 in the front-rear direction and is connected to the drive wheel 9 through a reduction mechanism in the reducer 8. a motor 10 interlocked with the motor 10, and a pair of left and right and two pairs of front and back vertical axis rollers 1 for preventing falling, which sandwich the lower rail member 4 from both the left and right sides at positions equidistant in the front and back direction from the position directly below the drive wheel 9.
1a, 11b and 12a, 12b, and a pair of front and rear back-up horizontal axis rollers 13a, 1 that abut the lower surface of the lower rail member 4 at a position equidistant in the front-rear direction from the position directly below the drive wheel 9.
3b, the vertical shaft roller 11b for preventing falling,
A pair of front and rear vertical axis rollers 14a, 14b for preventing fall that come into contact with the side surface of the upper rail member 3 on the machine frame 7 side at a position directly above the machine frame 12b, and a pair of vertical shaft rollers 14a, 14b attached to the side of the machine frame 7 corresponding to the guide rail 1 are provided. Current collecting means 1
5. This current collecting means 15 includes a group of rails 16 for power supply and control signal transfer, which are supported vertically in parallel to the main body 2 of the guide rail 1.
It is equipped with a current collector that slides into contact with the Said motor 1
0 is the power supply and control signal transfer rail group 16
It is remotely and automatically controlled from the ground side using electric power and control signals supplied from the ground.

The driven bogie 6 has a machine frame 17 located on the same side as the self-propelled bogie machine frame 7 with respect to the guide rail 1.
A free rotating wheel 18 with a flange is pivotally supported on one side of the upper end of the machine frame 17 so as to ride on the upper rail member 3 of the guide rail 1, and each of the vertical axis rollers 11a to 12b of the self-propelled truck 5. and 14a and 14b, vertical shaft rollers 19a to 21b for preventing falling are pivotally supported.

Reference numeral 22 is a cantilevered tray located on the opposite side of the guide rail 1 from the side on which each bogie machine frame 7, 17 is located.
A support member 23 that covers the upper part of the support member 23 is connected to the support member 23 .
A rotating member 25 is supported at the upper end of the self-propelled truck 5 by a horizontal horizontal shaft 24 located directly above the driving wheels 9 when the truck is viewed from the side. It is supported by the support member 23 on the side of the tray 22 via a vertical shaft 26 located right next to the horizontal horizontal shaft 24 and substantially right above the drive wheels 9 . Further, the upper end of the driven truck 6 is supported by a support member 23 on the tray 22 side via a vertical shaft 27 located substantially directly above the idle wheels 18. As a result, both the carts 5 and 6 can rotate horizontally around the vertical axes 26 and 27 with respect to the tray 22, and furthermore, the self-propelled cart 5 can rotate around the horizontal horizontal axis 24 with respect to the tray 22. It is possible to swing relative to each other in the front and rear directions.

According to the above configuration, due to the presence of the cantilevered tray 22, the lateral overturning moment acting on the self-propelled cart 5 and the driven cart 6 is reduced by the vertical shaft rollers 11a, 12a, and 19a located on the lower inner side for preventing the fall. ，
20a and vertical axis roller 1 for preventing falling on the upper and outer sides
4a, 14b and 21a, 21b, are received by both upper and lower rail members 3, 4, and both bogies 5,
6, the tray 22 is supported horizontally. Therefore, by rotationally driving the driving wheels 9 of the self-propelled cart 5 by the motor 10, the entire conveying device composed of the self-propelled cart 5, the driven cart 6, and the tray 22 is self-propelled along the guide rail 1. As a result, the object placed on the tray 22 can be transported. At this time, the attitude of the self-propelled trolley 5 with respect to the guide rail 1 is approximately determined by three points: the drive wheels 9 that abut the upper and lower sides of the guide rail 1, and the pair of front and rear horizontal back-up rollers 13a and 13b.

For example, in FIG. 2, when the drive wheels 9 are rotated counterclockwise to move the conveying device forward to the left, the upper end of the self-propelled cart 5 is loaded with the load on the tray 22 side. , the rotation of the drive wheels 9 causes a rotational force to act on the self-propelled cart 5 in the traveling direction (leftward) about the horizontal horizontal axis 24 . As a result, of the pair of front and rear backup horizontal axis rollers 13a, 13b that come into contact with the lower surface of the guide rail 1, the roller 13 on the running direction side
a is in pressure contact with the lower surface of the guide rail 1, and the drive wheel 9 is in pressure contact with the upper surface of the guide rail 1,
Since the drive wheel 9 and the roller 13a sandwich the guide rail 1 from above and below,
This clamping force increases the frictional force between the drive wheels 9 and the guide rails 1, and the conveyance device is reliably started. While the conveyance device is running, the traction load acting on the upper end of the self-propelled cart 5 becomes small, so the rotational force acting on the self-propelled cart 5 around the horizontal horizontal axis 24 also becomes small, and therefore the drive wheels 9 The guide rail clamping force between the back-up horizontal axis roller 13a and the back-up horizontal shaft roller 13a is also reduced. In such a state, the load acting on the drive wheel 9 in a direction perpendicular to the guide rail 1 causes the drive wheel 9 to
The necessary frictional force is obtained between the drive wheels 9 and the guide rails 1, and the drive wheels 9 propel the conveying device without slipping. When driving the drive wheels 9 in reverse clockwise direction to move the conveyance device backwards to the right,
A pair of front and rear backup horizontal axis rollers 13
Of rollers a and 13b, the right roller 13b on the running direction side functions as described above, and the same effect is performed.

When the drive wheels 9 are decelerated or braked, an inertial force in the running direction acts on the upper end of the self-propelled vehicle 5, so that the self-propelled vehicle 5 has a horizontal horizontal axis 24.
A rotational force in the opposite direction to the running direction acts around the
As a result, the back-up horizontal shaft roller 13b on the opposite side to the running direction (roller 1 when running backwards)
3a) is in pressure contact with the guide rail 1, and the drive wheel 9 and the roller 13b strongly clamp the guide rail 1, so the frictional force between the drive wheel 9 and the guide rail 1 increases, and the conveying device is reliably moved. It can be slowed down or braked.

When the conveyance device traveling in the above-mentioned direction travels uphill on the inclined path portion, a descending force due to gravity (component force of the load) acts on the upper end of the self-propelled cart 5 in the opposite direction (to the right) to the traveling direction. Therefore, similar to when starting, a large rotational force in the running direction about the horizontal horizontal axis 24 acts on the self-propelled trolley 5, and as a result, the drive wheels 9 and the horizontal back-up roller 13a on the running direction side are A large clamping force is generated that clamps the guide rail 1 from above and below. This clamping force increases as the slope of the inclined path section increases and as the load increases, so the frictional force between the drive wheels 9 and the guide rail 1 also increases accordingly, causing the transport The device will reliably travel uphill at a predetermined speed.

When traveling downhill, a descending force due to gravity (component force of load) acts on the upper end of the self-propelled vehicle 5 in the traveling direction, so the self-propelled vehicle 5 has a force that is opposite to the traveling direction around the horizontal horizontal axis 24. A large rotational force acts in the same direction, and as a result, the backup horizontal shaft roller 13b on the opposite side to the running direction and the drive wheel 9 sandwich the guide rail 1 from above and below with a large clamping force. That is, the only difference is which roller functions among the pair of front and rear backup horizontal shaft rollers 13a, 13b, and the frictional force between the drive wheels 9 and the guide rail 1 is reduced when traveling downhill in the same way as when traveling uphill. It is possible to increase the slope, and it is possible to run downhill at a predetermined safe speed without causing the conveying device to run out of control.

In addition, when configured as in the above embodiment, even if the guide rail 1 has a curved path portion in the horizontal direction, both bogies 5 and 6 have their respective vertical axis rollers 11a to 12b, 14a, 14b for preventing falling. and 19
Since a to 21b sandwich the guide rail 1 from both the left and right sides at the front and rear, the vertical axes 26 and 27 are moved along with the horizontal curve of the guide rail 1, respectively.
around the tray 22, the entire transport device can run smoothly along its horizontally curved path portion.

(Effects of the Invention) As described above, according to the monorail type conveyance device of the present invention, since it is a tray support type in which the tray is supported at two places in the front and back by the upper ends of the self-propelled cart and the driven cart, the cart is placed directly above the tray. It is convenient for various operations on the tray, such as loading and unloading cargo onto the tray, since there is no need to position a guide rail.

Furthermore, when the conveyance device is started, decelerated, stopped by braking, and when traveling uphill or downhill on an inclined route, friction between the drive wheels of the self-propelled cart and the guide rail Since the power can be increased automatically,
Reliable starting, deceleration, and stopping by braking are possible, and there is no fear that the driving wheels will slip, making it impossible to travel uphill, or that the vehicle will run out of control by exceeding the safe speed when traveling downhill.

Furthermore, compared to a case where both the self-propelled cart and the driven cart are configured to be able to swing back and forth with respect to the tray, the posture of the tray is stabilized and the structure is simpler. Furthermore, compared to the case where a single horizontal axis roller for back-up is provided below the drive wheels of a self-propelled trolley, the posture of the tray is stabilized even when traveling in either the forward or backward direction, and the drive wheels and the horizontal axis are The useful life of the roller can be extended.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal front view, and FIG. 2 is a side view. 1... Guide rail, 5... Self-propelled trolley, 6...
Driven truck, 9... Drive wheel with flange, 10... Motor, 11a to 12b, 14a, 14b, 19a
~21b... Vertical shaft roller for preventing falling, 13
a, 13b...Horizontal axis roller for backup,
18... Idle wheel with flange, 22... Tray, 24
...Horizontal horizontal axis, 26, 27...Vertical axis.

Claims (1)

[Scope of Claims] 1. The upper end of a self-propelled cart that rides on one guide rail and pivotally supports one drive wheel that is interlocked with a motor and vertical shaft rollers for preventing falling that sandwich the guide rail from both left and right sides. and an upper end of a driven trolley that pivotally supports idle wheels that ride on the guide rail and vertical shaft rollers for preventing falling that sandwich the guide rail from both left and right sides, supporting the tray at two locations, front and rear;
Only the self-propelled cart is supported at the upper end of the cart so that it can swing back and forth relative to the tray around a horizontal horizontal axis, and only this self-propelled cart is supported in two directions in the front and back relative to the lower position of the drive wheels. A monorail type conveyance device comprising horizontal back-up rollers that are in contact with the lower surface of the guide rail and are pivoted at respective positions. 2. Two sets of vertical shaft rollers for preventing the self-propelled cart and the driven cart from falling down are provided, respectively, and both carts are configured to be rotatable relative to the tray around their respective vertical axes. The monorail conveyance device according to item 1.