JPH0455217A - Stage dismantling device - Google Patents

Abstract

PURPOSE:To realize an accurate and also highly efficient operation by detecting the uppermost stage pallet position among stacked materials to be carried reaching on a lift device and operating a clamp device according to the detected signal in the device in the title for the materials to be carried consisting of pallets and cargoes in a carrier line. CONSTITUTION:When materials 1A and 1B to be carried are sent in and stopped above a lift device 10 setting a clamp device 20 in its home position and also setting a sensor arm 12 in its non-operational position, a drive shaft 24 is put in turning motion by 45 degrees in the operating direction. Thereby, a crank arm 29 comes to a position being put in turning motion by 45 degrees against the home position. At the same time, a sensor arm 32 takes as operational posture opposed to a pallet 2A. Subsequently, the lift device 10 operates to lift a table 13, and when the sensor arm 32 detects the upper stage pallet 2A, it stops. Here, by operating the clamp arm 29 and engaging the pallet 2A dismantling process is carried out. This process is repeated in succession.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to objects to be transported (
This invention relates to a tier-by-tier unraveling device used to separate pallets and loads one by one in a conveyance line.

2. Description of the Related Art Conventionally, this type of device has been disclosed, for example, in Japanese Unexamined Patent Publication No. 49-1
The structure found in Publication No. 18179 is provided. In other words, a support frame is erected on the side of the delivery conveyor, and an elevating frame is provided on the support frame side to be supported and guided, and the elevating frame is supported and guided on the elevating frame side so that it can move up and down above the conveyor. A fork is provided.

The conveyor conveys pallets, loads, and cages in two stacks, and stops facing the support frame. Next, the fork in the retracted position is raised and lowered together with the lifting frame to face the upper pallet.

In this state, the fork is advanced (protruded) and engaged with the pallet. Next, the lifting frame is raised and the upper pallet and load are lifted. After the pallets and loads on the lower tier are transported to the lower level by a conveyor, the elevator frame is lowered and the pallets and loads on the upper tier are unloaded onto the conveyor. Next, the fork is moved backward to remove the pallet from the pallet, and then the upper pallet and the load are transported to the lower level by a conveyor.

Problems to be Solved by the Invention According to the above-mentioned conventional method, since the shape of the load, that is, the height, is constant, it is possible to smoothly unstage the load with a simple set action of the fork, but when the height of the load varies. In this case, it is not easy to align the fork with respect to the upper pallet, and the fork may collide with the load or the pallet, or the work of separating the stacks cannot be performed efficiently.

SUMMARY OF THE INVENTION An object of the present invention is to provide a step-breaking device that can perform step-breaking work accurately and efficiently at all times.

assignment? Means to solve the above purpose? In order to achieve this, the stacking device of the present invention is provided with a lift device for stacked objects in a line for stacking and transporting objects consisting of pallets and loads in multiple stages, and a lift device on the side of the lift path. A clamping device that can be freely engaged and detached from the pallet of the upper stage to be transported is provided in the section, and this clamping device is connected to a clamp arm that can be freely engaged and detached from the pallet, and a sensor arm that faces the pallet prior to the engagement movement of the clamp arm. and a drive shaft to which these arms are attached.

Effects According to the configuration of the present invention, with the objects to be transported stacked in multiple stages stopped above the lift device, the sensor arm is first moved via the drive shaft, and the pallet l-[opposing working position shall be. Since this sensor arm moves ahead of the clamp arm, the clamp arm is in the non-engaged position.

Additionally, the sensor arm and clamp arm are set at a level that opposes the bottom of the upper load when the lower load is at its maximum height, so the sensor arm is detecting the upper load, but the upper pallet is not. Not detected. In this state, the lift device is operated to raise the entire group of objects to be transported. As a result, when the upper pallet rises and faces the sensor arm, the lift device is stopped based on the pallet detection by the sensor arm, and the clamp arm engages and moves via the drive shaft. After the clamp arm engages with the pallet, the group of objects to be transported is lowered by lowering the lift device, but when it descends a little, the upper pallet is stopped by the clamp arm. After that, only the objects to be transported in the lower stage are lowered. The objects to be conveyed on the lower stage are returned to the conveyance line and conveyed to the lower stage. After that, the object on the upper stage is raised slightly by the lifting operation of the lift device, and the object on the upper stage is returned to the conveyance line by operating the lift device downward with the clamp arm disengaged. obtain.

Example An embodiment of the present invention will be described below based on the drawings.

The transported objects IA and IB handled here consist of pallets 2A and 2B and loads 3A and 3B, respectively, and are stackable. A carry-in conveyor 4 that stacks and transports the two-wave conveyance items IA and IB, a working section conveyor 5 where the un-stacked items are carried out, and the conveyed items LA after being un-stacked.
, 1B are arranged in a straight line, thereby forming a conveyance line 7. Each conveyor 4,5,6 is of a chain type or a roller type, and the driving and stopping of each conveyor is performed individually or collectively. At the location of the working section conveyor 5, a lift device 10 is provided which acts on the stacked objects IA and IB. The lift device 10 includes a base member 11, a table 13 disposed above the base member 11 via a pantograph mechanism 12, an actuating device 14, and the like. The base member 11 is fixed to a machine frame 15 that extends from the lower part of the working section conveyor 5 to both sides.

A clamp device 20 is provided on the side of the lift path 16 by the lift device 10 and is detachable from the pallet 2A of the upper stage transported object IA. This clamp device @20 is a pallet)
Although it is divided to act on a total of four locations on both sides of the front end and both sides of the rear end of 2A, only one location will be explained because each has the same configuration. A pair of upper and lower bearings 22 is provided at the upper part of the machine frame I5 via a bracket 21, and a drive shaft 24 is provided which is supported by these bearings 22 and is rotatable around a vertical axis. . The bracket 21
A motor 25 with a speed reducer is attached to the lower part of the motor 25, and its upward output shaft 26 and the lower end of the drive shaft 24 are connected via a coupling 27. A clamp arm 29 is fixed to the drive shaft 24 between both bearings 22 via a key 28 or the like, and this clamp arm 29 extends in the lateral direction, and its tip is bent 90 degrees in the lateral direction. is defined as the retaining portion 29a. In addition, bracket 21
A stopper portion 30 is formed on the side for regulating the position of the home position 43, which is the most retracted position after the clamp arm 29 is detached. A sensor arm 32 is swingably attached to the upper part of the drive shaft 24 via a bearing 31. Here, with the conveyance line 7 in mind, a pair of front and rear sensor arms 32 on the left side form a set, and a pair of front and rear sensor arms 32 on the right side form a set. In each set, a light emitter 34 and a light receiver 35 are provided at the free end of one sensor arm 32 via a bracket 33, and a reflector 37 is provided at the free end of the other sensor arm 32 via a bracket 36. provided.

Further, the sensor arm 32 is set to face the pallet 2A prior to the engagement movement of the clamp arm 29.

That is, at the base of the sensor arm 32, an arc-shaped long hole 38 is formed extending approximately 90 degrees around the vertical axis 23, and a support 39 connected from the drive shaft 24 is fitted into the long hole 38. A matching bin 40 is provided. Further, a stopper plate 41 is provided on the bracket 21 side to stop the sensor arm 321 from rotating 45 degrees from the home position 43 to prevent the sensor arm 32 from correctly facing the pallet 2A. A spring 42 biases the sensor arm 32 to swing to the detection position.
It is provided between this sensor arm 32 and the stopper plate 41. When the navigating ramp arm 29 is at the home position 43, the bin 40 is set to be located at the back of the elongated hole 38 on the opposite side to the direction of rotation by the spring 42'.

Next, a description will be given of the work of unpacking the conveyed objects in the above-mentioned embodiment.

The stacked objects IA and IB are unloaded from the truck force by applying the fork of the forklift truck to the lower pallet 2BK, and are then transferred to the starting end of the transfer line 7. Then, they are conveyed in a stacked state on the conveyance line 7 and passed from the carry-in conveyor 4 to the work section conveyor 5. At this time, the table 13 in the lift device 10 is moving downward. Furthermore, in the clamp device 20, the motor 2
Since the drive shaft 24 is rotated to the non-actuating side via the drive shaft 5, the clamp arm 29 is at the home position 43 in contact with the stopper as shown in FIG. The bottle 40 that is integrated with the shaft 24 is the elongated hole 3.
Since the sensor arm 32 is rotated while being engaged with the inner part of the sensor arm 8, the sensor arm 32 is in a non-operating position where it swings against the spring 42.

In this state, as described above, the transported object IA.

1B is transported and stopped above the lift device IO.

Next, first, the drive shaft 24 is rotated 45 degrees in the operating direction. As a result, as shown by the solid line in FIG. 6, the Franz' arm 29 is rotated by 45 degrees, that is, θ4 degrees, with respect to the home position 43, but its locking portion 29a is still in the non-locking position. And a bin 40 integrated with the drive shaft 24
also rotates 45 degrees about the vertical axis 230, so that bin 4
The sensor arm 29, whose rotation has been restricted by 0, rotates around the vertical axis 230 due to the biasing force of the spring 42, and comes into contact with the stopper plate 41.

As a result, each sensor arm 32 assumes a working position facing the pallet, and the emitter 34 and receiver 35 are connected to the reflector 37.
will be facing. For example, the ramp arm 29 and the sensor arm 32 are set at a level where they face the lower part of the upper load 3A when the lower load 3B is at its maximum height.
The upper load IA (r detected but the upper pallet) 2A is at a position where it is not detected.

That is, the optical axis from the projector 34 comes into contact with the load 3A and does not reach the reflecting plate 37. In this state, the lift device IO is operated to raise it to the table 131, and lift it onto the two wave carriers xA and 1B' via the lower pallet) 2B. As a result, when the rising upper pallet 2A faces the sensor arm 32, the optical axis of the upper pallet)
2A, and after colliding with the reflection plate 37, the reflected light enters the light receiver 35. Based on this detection, the lift device 10 is stopped, the drive shaft 24 is again driven in the operating direction, the clamp arm 29 is rotated, and the retaining portion 29a is moved as shown by the imaginary line in FIG. Upper pant) 2A. At this time, the sensor arm 32 is prevented from rotating due to its contact with the stopper plate 41, so that the bottle 40 moves within the elongated hole 38.

After engaging the clamp arm 29 with the pants 1-2A as described above, the lift device 1o is operated to lower the transported objects IA and IB, but when they descend a little, the objects on the upper stage are lowered. pants) 2A is clamp arm 29
The receiver is stopped, and from then on, only the lower transported object IB is lowered. This lower transported object IB is returned to the working section conveyor 5 and transported downstream on the transport line 7. Thereafter, the upper transported object IA is slightly lifted by the lifting operation of the lift device 10, and the drive shaft 24 is operated in the opposite direction to disengage the clamp arm 29 and the sensor arm 32, returning to the state shown in FIG. . Next, by lowering the lift device 1°, the upper transported object I
A is returned to the working section conveyor 5 and conveyed downstream on the conveyance line 7. With the above steps, the step-breaking work is completed.

In the above embodiment, the clamp device 2011r is fixed to the machine frame 15 side, but the vertical position of the clamp device 2011r with respect to the machine frame 15 may be changeable. In addition, the transported objects LA are stacked in two tiers.
, IB are shown, but the number of stages larger than that can be similarly performed.

Effects of the Invention According to the present invention having the above configuration, the clamp arm is activated after the group of objects to be transported is raised to detect the upper punt by the sensor arm, so even if the height (shape) of the objects is various, Stacking work can always be done accurately and efficiently. Furthermore, by mounting the clamp arm and the sensor arm on the same drive shaft, the whole can be made compact.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a plan view and FIG.
FIG. 3 is a front view, FIG. 3 is a side view, FIG. 4 is a partially cutaway front view of the clamp device, and FIGS. 5 and 6 are partially cutaway plan views showing the same operating state. 1A, IB...To be transported, 2A, 2B...Pallet, 3A, 3B...Load, 5...Working section conveyor, 7.
...Transfer line, 10...Lift device, 13...Table, 16...Lift path, 20...Clamp device, 23...Vertical axis center, 24...Drive shaft, 25...・
m Motor with speed m, 29... Clamp arm, 29
a... Engagement part, 30... Stopper part, 32... Sensor arm, 34... Emitter, 35... Light receiver, 3
7...Reflector, 38...Long hole, 40...Pin, 4
1...Stopper plate, 42...Spring, 43...Home position. Agent Yoshihiro Morimoto 1st 2θ 18, /I3 # and relic drive shaft 2 ramp A, 2B - 1st, 3A, 3B --- technique

Claims (1)

[Claims] 1. A lift device for the stacked objects is installed in a line that stacks and transports objects consisting of pallets and loads in multiple stages, and a lift device for the stacked objects is installed on the side of the lift path. Equipped with a removable clamp device,
This clamp device is characterized by comprising a clamp arm that can be freely engaged and detached from the pallet, a sensor arm that faces the pallet prior to the engagement movement of the clamp arm, and a drive shaft to which these arms are attached. Tier breaking device.