JPH04106015A - Pallet conveyor device - Google Patents

Abstract

PURPOSE:To improve efficiency of a production line by providing a plural number of lift seats having lift drive devices respectively on a travel carriage, by providing a sensor to detect a load on a frame respectively and by devising to drive the lift seat facing the present one. CONSTITUTION:A pallet P carried in a pallet stock supply part 2 is stopped by a stopper 26 and positioned by a positioning means not shown in the drawing. Then, a travel carriage 30 is retreated by a specific stroke by a travel cylinder device 31 and positioned at the pallet stock supply part 2. Then, when a pallet presence sensor 42 detects the pallet P, a lift seat the pallet P on which is detected, for example, lift cylinder devices 37B, 37C of lift seats 34B, 34C actuate and support the pallet P on the lift seats respectively. Thereafter, the lift seat is descended by way of advancing the travel carriage 30 by one stroke. This is sequentially repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pallet conveying device used to place and convey a stack of plate-like workpieces, such as slates, in a fixed direction. be.

2. Description of the Related Art Conventionally, this type of device has a running cart that is reciprocated in the front and back direction with a constant stroke length, and is installed under a mount that supports supplied pallets. It is known that a plurality of elevating pedestals, for example, three elevating pedestals, which are set to be movable and retractable, are mounted on the above-mentioned traveling cart.

This is due to the rectangular movement by the above-mentioned traveling carriage and the lifting pedestal, that is, when the lifting pedestal rises and lifts each pallet from the pedestal, the traveling carriage is moved forward, and the lifting pedestal descends to support each pallet on the pedestal. The pallet is intermittently fed by repeatedly moving the traveling cart backward when the pallet is moved.

Problems to be Solved by the Invention Incidentally, in equipment that uses such pallets to transport workpieces, it is desirable to send each nodelet supplied onto the mount to the next process without leaving any vacant seats before or after it. .

However, in the conventional system described above, each lifting pedestal is raised and lowered at the same time to feed each pallet on the pedestal in the same direction at the same time, so if the supply of knotlets to the pedestal is interrupted, the feeding on the pedestal is In addition, it may be possible to adjust the position of the nodelets so that each pallet continues on the pedestal without interruption, but this would require a great deal of time loss and effort. becomes.

Therefore, the present invention solves these problems and provides a pallet conveying device that can continuously convey pallets without vacant seats in the front or rear even if there is an interruption in the supply of pallets, thereby improving the efficiency of the production line. The purpose is to

Means for Solving the Problems In order to achieve the above object, the present invention provides an elevating drive device for driving each of the plurality of elevating pedestals individually on the traveling trolley, and a lifting drive device provided on each of the elevating pedestals and arranged on the pedestal. The lift driving device is controlled by a detection output from a pallet presence sensor that detects the presence or absence of a pallet at a position corresponding to each lift pedestal.

In such a configuration, if the supply of valet/) is interrupted and a vacant seat occurs on the platform, the <let presence sensor detects this and moves the elevator platform corresponding to the pallet seated on the platform. Since only the pallets rise and convey the <lets, each pallet can be packed and sent out continuously without leaving empty seats in front or behind.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view of slate conveyance equipment incorporating the pallet conveyance device of the present invention.

In the figure, l is a pallet conveying section, and a valley two-tooth conveying device 3 having a Nono left stock supplying section 2 is installed therein. The pallet stock supply section 2 includes a second
As shown in the figure, a pallet P on which a plurality of slates S stacked on a plywood board W and the plywood board W is placed is supplied.

Reference numeral 4 denotes a slate conveying section which is provided orthogonally to the pallet conveying section 1 and separates and conveys the slate S and plywood W from the pallet P, and includes a chain conveyor 5 and the like.

Reference numeral 6 denotes a pallet stacking device provided in front of the pallet transport section 1, which stacks and stocks empty pallets P from which the slates S and plywood W have been separated.

7 is a slate distribution section provided in front of the slate conveyance #l14 to distribute the slate S, and 8 is a slate separation section that separates the slate S from the slate distribution section 7 from the plywood W. It is equipped with equipment 9, etc. 10 is a slate carrying-out section.

Reference numeral 11 denotes a plywood alignment and stacking device provided on the side of the slate removal section 8.

The specific configuration of the pallet conveying device 3 will be explained with reference to FIGS. 3 and 4.

Reference numeral 21 designates a plurality of racks arranged along the pallet transport direction (direction of arrow a) to support the pallets P, and is fixedly supported by the main body frame 22 . Main body frame 2 above
On the rear end side in the conveyance direction in 2, there is a roller 23 for supporting the pallet P supplied to the pallet stock supply section 2.
Fixed and movable pressing members 24, 25 and the like are provided for positionally regulating the position of the bar (P) on this roller 23 from the width direction. 26 is a stopper member for position adjustment attached to the rear end side of the pedestal 21, and 27 is a detection sensor attached to the main body frame 22 to detect the pallet P supplied to the pallet stock supply section 2.

28. 28 is a pair of rails laid along the conveyance direction below the pedestal 21, on which a traveling trolley 30 with running wheels 29 is placed. The driving device is a hydraulic cylinder device, for example, which reciprocates with a constant stroke length in the forward and backward directions of conveyance (in the directions of arrows a and b), and its piston rod 32 is connected to the traveling carriage 30. A position detection sensor 33 is attached to the main body frame 22 and detects the reciprocating position of the traveling carriage 30 to control the hydraulic cylinder device 31.

The traveling cart 30 includes a plurality of elevating pedestals 34 (34A, 34
B, 34C) is installed.

These elevating pedestals 34 are equipped with a base 35 and a pallet lifting lid 36 erected on the base 35, and are lifted up and down on the pedestal 21 by rectangular movement caused by the elevating displacement thereof and the reciprocating motion of the traveling cart 30. The pallet (37A, 37
B.

37C).

Reference numerals 38 and 39 are guide members for raising and lowering the raising and lowering pedestal provided on the traveling carriage 30.

Reference numerals 40 and 41 indicate position detection sensors that are attached to the traveling carriage 30 and detect the upper and lower limit positions of the elevating pedestal 34, respectively. 42 is a pallet attached to the main body frame 22 and located at a position corresponding to the lifting pedestal 34)
This is a pallet presence sensor that detects the presence or absence of P, and is configured to drive and control each of the lifting cylinder devices 37 using the respective detection outputs.

In the above configuration, the pallet stock supply section 2
While the pallet P carried in is stopped by the stopper 26, the movable pressing member 24 is driven to position the pallet P in the width direction by the movable pressing member 24 and the fixed pressing member 25.

Next, the traveling carriage 30 and the elevating base 34 are caused to perform a rectangular movement. That is, from the state shown in FIG. 5(A), the traveling thinning device 31 is driven to move the traveling cart 30 backward by a certain stroke length and position it at the pallet stock supply section 2 shown in FIG. 5(B). . Thereafter, when the pallet presence sensor 42 detects the pallet, the central and rearmost lifting cylinder devices 37B and 37C are driven, and the lifting pedestals 34B and 34C are raised, and lifted from the pedestal 21 as shown in FIG. 5(C). Lift each pallet P. When the upper limit position detection sensor 40 detects the elevated position of these elevating pedestals 34B, 34C, the elevating cylinder devices 37B, 37
The drive of C is stopped.

After that, the traveling cylinder device 31 causes the traveling bogie 3 to
0 by a certain stroke length as shown in FIG. 5(D), and in this position, if the lifting pedestals 34B and 34C are lowered as shown in FIG. 5(E), the pallet P will be in front. By repeating these operations, each pallet P is intermittently fed sequentially. In addition, at the front end of the above-mentioned foremost elevating pedestal 34A, there is a pallet' extrusion part 34.
A projectingly provided pallet (P) located in front of the elevating pedestal 34A is pushed forward by the pallet push-out portion 34a when the elevating pedestal 34A moves forward, as shown in FIG.

As described above, there are three elevating pedestals 34A.

By making the drives 34B and 34C independent and driving only the elevating pedestal 34 corresponding to the pallet P detected by the pallet presence sensor 42, the pallet P is supplied as shown in FIG. 5(A). Even if the
It is possible to send out the pallets so that there are no empty seats before or after them, and there is no need to adjust the pallet position for simultaneous feeding. As a result, the supply work of pallets) P was
It becomes possible to perform the pallet conveyance process without worrying about the operation.

In the above embodiment, an example was explained in which three elevating pedestals 34 were provided on the traveling trolley 30, but the number of elevating pedestals 34 can be increased or decreased as appropriate.

Effects of the Invention As described above, according to the present invention, the traveling trolley is provided with an elevating drive device that independently drives a plurality of elevating pedestals, and the detection output of the pallet occupancy sensor provided on each of the elevating pedestals is used to Since each lifting drive device is controlled, even if a pallet becomes empty midway through the supply, each pallet can be sent out continuously without empty seats before or after, contributing to automation and efficiency of subsequent work. can.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a slate conveying facility incorporating a pallet conveying device according to an embodiment of the present invention, FIG. 2 is a diagram showing a state in which slates are stacked on pallets via plywood boards, and FIGS. The figures are a side view and a rear view of the pallet conveying device, respectively. Figures 5 (A) to (E) are operation explanatory diagrams of the main parts of the pallet conveying device, and Figure 6 is a diagram of the pallet extrusion section on the foremost lifting pedestal. It is an operation explanatory diagram. 21... Frame, 30... Traveling trolley, 34 (34A. 34B, 34C)... Lifting pedestal, 37 (37A. 37B, 37C)... Lifting drive device, 42... Pallet presence sensor , P... Palette.

Claims (1)

[Scope of Claims] 1. A traveling cart that is reciprocated in the front and rear direction with a constant stroke length is disposed below the mount that supports the supplied pallet, and is set to be able to appear and retract from the top surface of the mount. In the pallet conveying device, the pallet is configured to have a plurality of lifting pedestals mounted on the traveling carriage and to intermittently feed the pallet through rectangular movement by the traveling carriage and the lifting pedestals. An elevating drive device to be driven is provided on the traveling carriage, and each of the above-mentioned A pallet conveying device configured to control a lifting drive device.