JP2007176377A - Lifting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use an actuator of a winding machine also as an actuator of a vertical location regulation mechanism and reduce its cost. <P>SOLUTION: One end of a rope 12 of a winding machine 13 is fixed to a winding barrel, the other end 12a is drawn and guided toward a transferring direction moving away from a lifting rail HR through moving pulleys 14, 15 at the lifting rail HR and a fixed pulley 16 at a fixed rail R. There is provided a resilient biasing means 20 fixed to an end part 17b of a location regulation member 17 through a connecting plate 18 so as to bias the location regulation member 17 toward a transferring direction repelling from the lifting rail HR, and a spring constant (k) of the resilient biasing means 20 is set such that the location regulation means 17 and vertical location regulation members 23a, 23b are not interfered to each other when the lifting rail HR is lifted up or lifted down. The lifting rail HR ascends to wind up a rope 12 further by a winding-up machine 13, thereby the location regulation member 17 enters between the vertical location regulation members 23a, 23b against the biasing force of the resilient biasing means 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement of an elevating device that lowers and raises an object to be conveyed conveyed by a conveyor at a predetermined position on a conveying path.

  For the purpose of delivery of the carrier between the upper traveling route and the lower traveling route, or the lowering and raising of the carrier between the predetermined position and the predetermined working position below the transport route, the fixed rail and the fixed rail are connected to the fixed rail and moved up and down. A lifting device that includes a lifting rail that can be lifted and lowered by a driving device, and that lowers and raises the lifting rail and the carrier while the carrier conveyed along the fixed rail by a conveyor is transferred to the lifting rail is widely used. (For example, refer to Patent Document 1).

  In such an elevating device, the height between the two rails is set in order to smoothly transfer the carrier between the fixed rail and the elevating rail when the elevating rail is at the same height with respect to the fixed rail. A vertical position restricting mechanism that suppresses a deviation in direction is used. As the vertical position restricting mechanism, a structure is generally adopted in which a position restricting body supported so as to be slidable in the transport direction by the fixed rail is inserted between vertical position restricting rollers provided on the lift rail by an air cylinder. (For example, refer to Patent Document 2).

JP-A-4-350017 (FIGS. 1-2) Japanese Utility Model Publication No.7-1337 (Fig. 1-3)

  The conventional elevating device as described above has an effect that the carrier can be smoothly transferred between the fixed rail and the elevating rail by the vertical position regulating mechanism. However, since an air cylinder different from the actuator of the lifting / lowering drive device is used as the actuator for the vertical position regulating mechanism, control parts such as the air cylinder, solenoid valve, components such as piping, electric wires, and air supply unit Costs, as well as work costs such as assembly work and piping work. Therefore, there is a great need for cost reduction, and there is room for improvement in terms of cost reduction.

  The present invention has been made to solve the above-described problems, and reduces the cost by making it possible to use the actuator of the lifting drive device as the actuator of the vertical position regulating mechanism. An object of the present invention is to obtain an elevating device that can be used.

  In order to solve the above problem, the lifting device according to the present invention is configured so that the height of the lifting rail that is lifted and lowered by the lifting drive device is the same as the height of the fixed rail. A vertical position regulating mechanism that penetrates between a vertical position regulating body provided on the elevating rail and a position regulating body supported so as to be slidable in the conveying direction by a rail, and a carrier conveyed along the fixed rail by a conveyor A lifting device that lowers and raises the lifting rail and the carrier while being transferred to the lifting rail, wherein the lifting drive device lowers or lifts the lifting rail and the carrier by feeding or winding the cable body. A hoisting machine for lifting, fixing one end of the cable body to a hoisting drum of the hoisting machine, and connecting the other end of the cable body to the lifting rail side Directly or indirectly fixed to the end of the position restricting body opposite to the penetrating end of the upper and lower position restricting body through the moving pulley and the fixed pulley on the fixed rail side in the conveying direction. And an elastic urging means for urging the position restricting body in the conveying direction away from the elevating rail, and the spring constant of the elastic urging means is adjusted between the position restricting body and the vertical position restricting when the elevating rail is raised and lowered. The hoisting rail is raised by the winding machine by the hoisting machine, and the hoisting rail is lifted by the hoisting machine and is in contact with the stopper. By winding the body, the position restricting body penetrates between the vertical position restricting bodies against the biasing force of the elastic biasing means.

  Here, it is preferable to provide a sensor that detects a state in which the position restricting body penetrates between the vertical position restricting bodies provided on the lift rail and the lift rail and the fixed rail are connected.

  According to the lifting device according to the present invention, the height of the lifting rail that is lifted and lowered by the lifting drive device is the same as the height of the fixed rail. A vertical position restriction mechanism that penetrates between a vertical position restriction body provided on the lifting rail and a position restriction body supported so as to be slidable is provided, and a carrier conveyed along the fixed rail by a conveyor is transferred to the lifting rail. A lifting device that lowers and raises the lifting rail and the carrier in a state where the lifting and lowering driving device lowers or raises the lifting rail and the carrier by feeding or winding the rope. One end of the cable body is fixed to a winding drum of the hoist, and the other end of the cable body is connected to the movable pulley on the lifting rail side and the It is routed in the conveying direction away from the elevating rail via the fixed rail on the fixed rail side, and directly or indirectly fixed to the end of the position restricting body opposite to the penetrating end to the vertical position restricting body, the position An elastic urging means for urging the restricting body in the conveying direction away from the lifting rail is provided, and the position restricting body and the vertical position restricting body interfere with the spring constant of the elastic urging means when the lifting rail is raised and lowered. In the connectable state where the hoisting rail is raised by the winding machine being wound by the hoisting machine and is in contact with the stopper, the hoisting machine is further wound by the hoisting machine. As a result, the position restricting body penetrates between the vertical position restricting bodies against the urging force of the elastic urging means. Since it also serves as a tutor, compared to a configuration using an air cylinder different from the actuator of the hoisting machine as the actuator of the vertical position regulating mechanism, control equipment such as an air cylinder, a solenoid valve, piping, electric wires, and Costs of components such as an air supply unit and work costs such as assembling work and piping work are not required, so that a significant cost reduction can be achieved.

  In addition to the above effects, if the position restricting body is provided with a sensor that detects a state in which the lifting rail and the fixed rail are connected by penetrating between the vertical position restricting bodies provided on the lifting rail, When the state where the lift rail and the fixed rail are connected is detected by the sensor, it is possible to suppress excessive tension on the rope by turning on the brake of the hoisting machine. At the same time, since the connection state is maintained even when the actuator of the hoisting machine is turned off, the power energy supplied to the actuator can be reduced.

  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 direction of arrow F in the figure is the front in the transport direction, the opposite side is the rear, the left and right are left and right from the rear to the front, and the view from the left is the front view.

  1 and 2 are front views showing the configuration of the lifting device according to the embodiment of the present invention. FIG. 1 shows a connection state between the fixed rail and the lifting rail, and FIG. 2 shows the lifting rail with respect to the fixed rail. It shows a lowered state. FIG. 3 is a partially enlarged front view for explaining the operation of the vertical position regulating mechanism.

  In FIG. 1, an overhead conveyor 1 is suspended by a carrier 2 and a carrier 2 that can be traveled forward in the transport direction (see arrow F in the figure) along a fixed rail R and a lift rail HR that are travel rails. The hanger 3 etc. which support the thing W are comprised. The carrier 2 connects the front and rear load trolleys 4 and 4, the front trolley 5, the rear trolley 6, the extendable drive rod 7 that connects the front and rear load trolleys 4 and 4, and the front load trolley 4 and the front trolley 5. The connecting rod 8, the connecting rod 9 for connecting the rear load trolley 4 and the rear trolley 6, the carrier frame 10, and the like.

  The front and rear load trolleys 4 and 4 are, for example, a vertical roller and a vertical shaft that can rotate around a conveyance width direction axis (left-right direction axis) that rolls on a fixed rail R and a lifting rail HR that are substantially I-shaped monorails. It has a horizontal roller that can rotate about (vertical direction axis) and engages with the fixed rail R and the lifting rail HR. The leading trolley 5 has a vertical roller that can rotate about the conveyance width direction axis that rolls on the fixed rail R and the lifting rail HR, and a horizontal roller that can rotate about the vertical axis. The rear trolley 6 that engages with the elevating rail HR includes a vertical roller that rotates on the fixed rail R and the elevating rail HR and that can rotate about the conveyance width direction axis and a horizontal roller that can rotate about the vertical axis. And engages the fixed rail R and the lifting rail HR.

  Friction rollers (not shown) disposed in the conveyance path abut on the right and left side surfaces of the load trolleys 4 and 4, the front trolley 5 and the rear trolley 6, the drive rod 7 and the connecting rods 8 and 9 of the carrier 2 from the conveyance width direction. A substantially vertical surface is formed, and a thrust is applied to the carrier 2 by the driving force of the friction roller, and the carrier 2 moves forward in the conveying direction along the fixed rail R and the lifting rail HR which are running rails (arrow F in the figure). See).

  1 and 2, the lifting device 11 is fixed at one end to a winding drum of a hoisting machine 13 in which a lifting motor, a reduction gear, a brake, a winding drum and the like, which are lifting driving devices, are integrated. A hoisting machine 13 winds and unwinds the front and rear cable bodies 12, 12 that are hoisting chains wound around. The lifting device 11 separates the fixed rail R and the lifting rail HR in a state where the rollers of the trolley are engaged with the lifting rail HR, and the carrier 2 and the hanger 3 together with the lifting rail HR as shown in FIG. And, after the transported object W is lowered and a predetermined work is performed at a predetermined work position below, the lift rail HR and the like are raised to return to the connection state between the fixed rail R and the lift rail HR shown in FIG. it can. The cable body 12 may be a wire rope or the like.

  The basic mechanism of the vertical position regulating mechanism that suppresses the deviation in the height direction between the fixed rail R and the lift rail HR is the same as that of the conventional device. That is, as shown in FIG. 1, between the upper and lower guide rollers 23a and 23b, which are upper and lower position restricting bodies that can be rotated around the conveyance width direction axis attached to the support plate 23 fixed on the lifting rail HR. The upper and lower guide rollers 21 a, 21 b, 22 a, 22 b that can be rotated around the conveyance width direction axis attached to the support block body 19 fixed on the fixed rail R can be slid in the conveyance direction (front-rear direction). The fixed rail R and the lifting rail HR are in a connected state in which the shift in the height direction between the rails is suppressed by penetrating the lock rod 17 that is a supported position restricting body. The position restricting body does not have to be a bar-shaped member such as a horizontal plate.

  The lock rod 17 has a pointed end portion 17a which is a penetrating end portion on the lift rail HR side, and a connecting plate 18 extending in the vertical direction is fixed to an end portion 17b opposite to the pointed end portion 17a. A compression coil spring 20 is disposed between the connecting plate 18 and the end surface 19 a of the support block body 19 while being loosely fitted to the lock rod 17. The compression coil spring 20 is an elastic urging means that urges the position restricting body (lock rod 17) in the conveying direction away from the lifting rail HR (conveying direction away from the vertical position restricting bodies (guide rollers 23a, 23b)). Configure. If the position restricting body is not rod-shaped, the compression coil spring 20 cannot be externally fitted to the position restricting body. For example, the support members inserted from both ends of the compression coil spring are connected to the connecting plate 18 and What is necessary is just to provide in the support block body 19. FIG.

  The hoisting machine 13 is fixed to the upper and lower fixed rails R, R on the upper side of the frame 11a connected and fixed in a state of being spaced upward from the rails R, R. As shown, the front and rear rope bodies 12 and 12 suspended from the winding drum are fixed to one end of the rope body 12, and the front and rear sprockets 14 and 15 that can be rotated around the transport width direction axis mounted on the lifting rail HR. The direction is changed via a sprocket 16 that is pivotable about the conveyance width direction axis attached to the lower surface of the frame 11a, and is drawn around in the conveyance direction away from the lifting rail HR. 12 a is fixed to the connecting plate 18. Depending on the shape of the position restricting body, the other end 12a of the rope 12 may be directly fixed to the end of the position restricting body opposite to the penetrating end of the vertical position restricting body.

  That is, one end portion of the rope body 12 is fixed to the winding drum of the hoisting machine 13, and the other end portion 12a of the rope body 12 is fixed to the sprockets 14 and 15 that are moving pulleys on the lifting rail HR side and the fixed rail R side. It is drawn around in the conveying direction away from the elevating rail HR via a sprocket 16 that is a pulley, and is directly or indirectly fixed to an end portion 17b opposite to the penetrating end portion 17a of the position restricting body 17 into the vertical position restricting body. .

  Next, the raising / lowering operation | movement of the raising / lowering rail HR by the raising / lowering apparatus 11 is demonstrated. When the cable body 12 is unwound by the hoisting machine 13 from the connection state of the fixed rail R and the lifting rail HR shown in FIG. 1, the tension of the cable body 12 becomes small as will be described later. The biased lock rod 17 moves together with the end portion 12a of the cable body 12 and the connecting plate 18 in the transport direction away from the lifting rail HR (the transport direction away from the guide rollers 23a and 23b), and the front and rear fixed rails R , R and the lifting rail HR are separated. Further, when the rope 12 is fed out by the hoisting machine 13, the carrier 2, the hanger 3 and the conveyed object W can be easily lowered together with the lifting rail HR as shown in FIG. Predetermined work can be performed.

  After the predetermined work, the carrier 12, the hanger 3, and the transported object W can be easily raised together with the lifting rail HR by winding the cable body 12 with the hoisting machine 13. That is, when the rope 12 is wound up by the hoisting machine 13 as shown by the arrow A in FIG. 3, the lifting rail HR and the like rise as shown by the arrow B in FIG. The slopes 25, 25 before and after the lifting rail HR come into contact with the slopes 24, 24 of R, thereby restricting the upward and downward movement of the lifting rail HR.

  In addition, before the front and rear slopes 25 and 25 of the lifting rail HR abut on the slopes 24 and 24 of the fixed rails R and R, the shock absorbers 26 and 26 hanging from the lower surface of the frame 11a abut on the upper surface of the lifting rail HR. . Therefore, since the front and rear inclined surfaces 25 and 25 of the elevating rail HR come into contact with the inclined surfaces 24 and 24 of the fixed rails R and R in a state where the rising force of the elevating rail HR is suppressed by the buffer bodies 26 and 26, the corresponding contact is made. The shock of time is eased.

  In the state where the fixed rails R, R and the lift rails HR are in contact with the slopes 24, 24 of the lift rails HR in contact with the slopes 24, 24 of the fixed rails R, R, the hoisting machine 13 further causes the cable body 12 to be connected. 3, the tension of the cord body 12 increases, so that the lock rod 17 is opposed to the urging force due to the restoring force of the compression coil spring 20 as shown by the arrow C in FIG. And it moves to the direction approaching the guide rollers 23a and 23b together with the connecting plate 18. And since the lock rod 17 penetrates between the upper and lower guide rollers 23a, 23b provided on the lifting rail HR from the pointed end portion 17a which is the penetration end portion, the fixed rails R, R and the lifting rail HR are both The connection state shown in FIG. 1 is obtained in which the deviation in the height direction between the rails is suppressed.

  The connection state can be easily detected by detecting the positions of the connecting plates 18 and 18, for example, by sensors 27 and 27 such as limit switches provided before and after the frame 11a. If the connection state between the fixed rails R, R and the lifting rail HR is detected by the sensors 27, 27, if the brake of the hoisting machine 13 is turned on, excessive tension is applied to the ropes 12, 12. In addition to being able to suppress, since the connection state is maintained even when the lifting motor is turned off, the power energy supplied to the lifting motor can be reduced.

  As described above, the actuator of the vertical position regulating mechanism in the present invention is also used as the actuator of the lift drive device, and does not use an air cylinder different from the actuator of the lift drive device. Therefore, there is no cost for components such as control equipment such as air cylinders, solenoid valves, piping, electric wires, and air supply, and work costs such as assembly work and piping work. Can be reduced.

Next, a method for determining the spring constant of the compression coil spring 20 will be described by taking the case of the configuration of the present embodiment as an example. In the configuration of FIGS. 1 to 3 of the present embodiment, the sprockets 14 and 15 are dynamic pulleys, and the sprocket 16 is a constant pulley. When the number of effective moving pulleys is n, the force F that the load P acts on the spring via the moving pulley is F = P · (½) ⁿ . In the configuration shown in FIGS. 1 to 3, if the total lifting weight of the lifting rail HR, the carrier 2, the hanger 3, and the transported object W is TP, the rope 12 has two front and rear systems, and the sprockets 14 and 15 move. Since it is a pulley (the number of effective moving pulleys is 1), the force F applied to the compression coil spring 20 by the total lifting weight TP is F = TP · (1/2) · (1/2) = TP / 4.

  Therefore, the compression constant of the compression coil spring 20 is set to k, and the compression amount from the free length of the compression coil spring 20 to the position where the tip 17a of the lock rod 17 and the guide rollers 23a, 23b do not interfere with each other during the lifting operation of the lifting rail HR. If (displacement amount) is x, kx> F = TP / 4. That is, the spring constant k may be determined by k> (TP / 4) / x.

  If the compression coil spring 20 having the spring constant k determined in this way is used, the lock rod 17 that is the position restricting body and the guide rollers 23a and 23b that are the upper and lower position restricting bodies may interfere when the elevating rail HR is raised or lowered. Therefore, the lifting operation of the lifting rail HR is not restricted by the lock rod 17.

  For example, when the cable body 12 is unwound by the hoisting machine 13 in the connection state between the fixed rails R and R and the lifting rail HR shown in FIG. 1, the tension of the cable body 12 is reduced, and the spring constant k is set as described above. Due to the determined restoring force of the compression coil spring 20, the lock rod 17 moves in the transport direction away from the guide rollers 23 a and 23 b together with the end portion 12 a of the cable body 12 and the connecting plate 18, and the front and rear fixed rails R and R And the lifting rail HR are reliably separated from each other, so that the lock rod 17 does not interfere when the lifting rail HR or the like is lowered. Similarly, even when the raising / lowering rail HR is raised, the movement is limited until the front and rear slopes 25, 25 abut against the slopes 24, 24 of the fixed rails R, R. Absent.

  In the above description, the configuration using the compression coil spring 20 as the elastic urging means has been described. However, the elastic urging means in the elevating device of the present invention is not limited to the compression coil spring, and the position restricting body. What is necessary is just to urge the lock rod 17 in the conveying direction away from the lifting rail HR.

It is a front view which shows the structure of the raising / lowering apparatus which concerns on embodiment of this invention, and has shown the connection state of a fixed rail and a raising / lowering rail. Similarly, the state where the elevating rail is lowered with respect to the fixed rail is shown. It is a partial enlarged front view for operation | movement description of an up-and-down position control mechanism.

Explanation of symbols

F Conveying direction k Spring constant HR Lifting rail R Fixed rail W Conveyed object 1 Overhead conveyor 2 Carrier 11 Lifting device 12 Rope 12a End 13 Hoisting device (lifting drive device)
14,15 Sprocket (dynamic pulley)
16 Sprocket (fixed pulley)
17 Lock rod (position regulating body)
18 connecting plate 19 support block body 20 compression coil spring (elastic urging means)
21a, 21b, 22a, 22b Guide roller 23 Support plate body 23a, 23b Guide roller (vertical position restricting body)
24, 25 Slope (stopper)
27 Sensor

Claims (2)

A position restricting body supported by the fixed rail so as to be slidable in the conveying direction in a connectable state of the lift rail and the fixed rail, wherein the height of the lift rail that is lifted and lowered by the lift driving device is the same as the height of the fixed rail. A vertical position restricting mechanism that penetrates between the vertical position restricting bodies provided on the lifting rail is provided, and the carrier that is conveyed along the fixed rail by a conveyor is transferred to the lifting rail, and the lifting rail and the carrier are A lifting and lowering device for lowering and raising;
The lifting drive is a hoisting machine that lowers or raises the lifting rail and the carrier by feeding or winding the cable body,
One end of the rope is fixed to the winding drum of the hoisting machine, and the other end of the rope is separated from the lifting rail via a moving pulley on the lifting rail side and a fixed pulley on the fixed rail side. To the conveying direction, and directly or indirectly fixed to the end of the position restricting body opposite to the penetrating end to the vertical position restricting body,
Provided with an elastic biasing means for biasing the position restricting body in the conveying direction away from the lifting rail;
The spring constant of the elastic biasing means is set so that the position restricting body and the vertical position restricting body do not interfere when the lifting rail is raised and lowered.
In the connectable state where the elevating rail is lifted by the winding machine being wound by the hoisting machine and is in contact with the stopper, the position regulating body is further wound by winding the rope body with the hoisting machine. An elevating device that penetrates between the upper and lower position restricting bodies against an urging force of the elastic urging means. The elevating device according to claim 1, wherein a sensor is provided for detecting a state in which the position restricting body penetrates between upper and lower position restricting bodies provided on the elevating rail and the elevating rail and the fixed rail are connected.

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