JP2006001690A - Order picking truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an order picking truck capable of surely preventing transference of an operator onto a pallet when a locking device is not operated. <P>SOLUTION: This order picking truck 1 is provided with a pallet locking device 2, and when a locking bar 5 is separated from the pallet in the condition wherein a fork 4 is inserted into holes of the pallet, a baffle plate 8 is projected from the top surface 30 of a driver's cab. The operator is kept from transference from the driver's cab 3 onto the pallet P. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an order picking truck in which both a driver's cab and a fork move up and down along a mast erected on a vehicle body.

A so-called pallet locking device may be used for the order picking track in order to prevent unexpected swing of the pallet inserted into the fork. The pallet locking device prevents the pallet from swinging when the operator who has boarded the driver's cab moves onto the pallet, causing a drop accident of the operator. As shown in Patent Documents 1 and 2 below, this pallet locking device is generally a device that presses and locks a part of the pallet with a rod-like body arranged in parallel with the fork. In addition, since the pallet is not locked for some reason and it is dangerous for the operator to move on without knowing this, each of the above patent documents has means for notifying the operating state of the pallet locking device. Are listed. Specifically, this means is lighting of a lamp or ringing of a buzzer, and this is a mechanism for alerting the operator.
Japanese Patent Laid-Open No. 11-228085 JP 2003-48699 A

  However, even if the lamp is lit or the buzzer is ringing, the operator does not always notice this. Or even if you notice this, there is still the possibility of accidental accidents and mistakes that can lead to pallets and cause an accident. Since order picking trucks are usually used for work at a high altitude of several meters above the ground, it is desirable to take further measures against falling accidents.

  In view of such a situation, an object of the present invention is to provide an order picking truck that can more reliably prevent an operator's dropping accident.

  To achieve the above object, according to a first aspect of the present invention, there is provided a pallet lock for fixing a pallet inserted into a fork in an order picking truck in which a cab and a fork are moved up and down along a mast standing on a vehicle body. And a baffle plate that is advanced when the pallet lock device is not operated and retracted when the pallet lock device is in operation, and is arranged between the cab and the fork when the pallet lock device is not operated. An operator on the cab is prevented from moving on the fork.

  In addition, the second invention is to fix the pallet to the fork by pressing a lock bar on a pallet supported by a fork adjacent to the cab, and to separate the lock bar from the pallet. In the order picking truck for releasing the pallet, based on the pallet being released, taking a posture to protrude from the cab and blocking between the cab and the fork, and based on the pallet being fixed, A baffle plate that is flush with the cab is provided.

  Furthermore, a third invention is characterized in that, in the second invention, there is provided guide means for attaching the baffle plate to the driver's cab in an upright posture and elevating drive means for raising and lowering the baffle plate. .

  In the order picking truck according to the first aspect of the present invention, a baffle plate is provided between the cab and the fork when the pallet locking device is advanced and retracted during operation. The baffle plate as an obstacle can forcibly prevent the operator on the cab from moving onto the fork when the pallet locking device is not in operation, so that the operator can be prevented from falling.

  Further, according to the order picking trucks according to the second and third inventions, the operator is forcibly prevented from moving onto the pallet when the pallet locking device is not operated, and is subject to any restrictions during operation. It is possible to transfer onto the pallet.

  1A and 1B show an order picking track 1 according to an embodiment of the present invention. The order picking truck 1 is equipped with a pallet locking device 2 shown in FIG.

As shown in FIG. 2, the pallet locking device 2 has two forks 4 and a pair of lock bars 5 arranged so as to be adjacent to the cab 3 in the holes of the pallet P having the lower deck board d. In this state, the pallet P can be fixed by pressing the pair of lock bars 5 against the lower deck board d of the pallet P. The pallet lock device 2 can release the pallet P by separating the lock bar 5 from the lower deck board d. Such an operation of the pair of lock bars 5 is realized by a lock driving source 22 that moves the operating rod 20 forward and backward from the cylinder 21.

  FIG. 3 shows the configuration of the control device 6 that controls the operation of the pallet locking device 2. The control device 6 includes a lock operation detection device 7 that detects that the pallet P is fixed to the fork 4, a position detection device 9 that detects a position of a baffle plate 8 to be described later and sends a member detection signal, and a baffle plate 8. The control part 10 which controls the attitude | position of this is provided.

  Although the arrangement of the locking operation detection device 7 is not shown, a device comprising a magnet fixed to an appropriate portion of the lock bar 5 and a proximity sensor disposed in the vicinity of the magnet is used. When the lock bar 5 takes a posture of pressing the lower deck board d of the pallet P, the proximity sensor approaches the magnet and outputs an OFF signal, and the lock bar 5 takes a posture of separating from the lower deck board d. When taking, the proximity sensor is separated from the magnet and outputs an ON signal. The configuration of the position detection device 9 will be described later.

  As shown in FIGS. 1A and 1B, the baffle plate 8 is a plate material that has a width dimension equivalent to that of the cab 3 and rises in the vertical direction. As shown in FIG. 4, the vicinity of both ends of the baffle plate 8 is attached to the cab 3 through a pair of guide devices 11 so as to be movable up and down. Each guide device 11 guides a pair of sliders 111 fixed to both ends of the baffle plate 8 in the vertical direction by a pair of guide rails 112 raised along the inner surface of the cab 3. Below the baffle plate 8, an elevating drive device 12 that raises and lowers the entire baffle plate 8 is installed.

  The elevating drive device 12 is mainly a cylinder-shaped prime mover in which an operating rod 121 that moves forward and backward in the vertical direction by electric, hydraulic or pneumatic pressure is connected to a baffle plate 8. FIG. 1B is an example in which two lifting drive devices 12 are arranged separately in the width direction of the baffle plate 8, and FIG. 4 is directly below the position where the width direction of the baffle plate 8 is divided into approximately two equal parts. This is an example in which the lifting drive device 12 is arranged.

  According to the order picking truck 1, when the fork 4 is inserted into the hole of the pallet P and the lock bar 5 is separated from the lower deck board d of the pallet P (when the pallet locking device 2 is inactive) ), Since the lock operation detection device 7 outputs an ON signal, based on this, the control unit 10 advances the operation rod 121 of the elevating drive device 12 upward and causes the baffle plate 8 to protrude from the upper surface 30 of the cab 3. Thereby, the baffle plate 8 takes the attitude | position which interrupts | blocks between the cab 3 and the fork 4, and stops that an operator moves on the fork 4. FIG. At the same time, the operator can surely recognize that the pallet P is not fixed to the fork 4 immediately before performing the picking operation by visually observing the posture of the baffle plate 8.

  On the contrary, when the lock bar 5 is pressed against the lower deck board d of the pallet P supported by the fork 4 by the operation of the pallet lock device 2, the operation of the pallet lock device 2 is detected by the lock operation detection device 7. Detect and send off signal. Based on this, the control unit 10 retracts the operating rod 121 of the elevating drive device 12 downward. Then, it stops when the upper edge of the baffle plate 8 is flush with the upper surface 30 of the cab 3. Thereby, the operator can transfer on the pallet P from the cab 3 without any obstacles.

  Next, based on FIG. 5, order picking including a sliding portion 13 that pivotably attaches the baffle plate 8 to the cab 3 so as to stand upright or in a horizontal posture, and a turning drive device 14 that turns the baffle plate 8. The track 1 ′ will be described. Constituent elements similar to those in the first embodiment are denoted by the same reference numerals, and detailed description and illustration thereof are omitted.

  The smooth portion 13 is configured by pin-joining the lower edge portion of the baffle plate 8 with both ends to the front surface 30 of the cab 3. The turning drive unit 14 is configured to pin-join the rear end of the prime mover substantially the same as the above-described lift drive unit 12 to a bracket 31 provided at an appropriate position of the cab 3, and to connect the tip of the actuation rod 141 of the prime mover, A pin is joined to an arm portion 81 extending downward from the baffle plate 8.

  According to the order picking truck 1 ', when the lock bar 5 is separated from the lower deck board d of the pallet P with the fork 4 inserted into the hole of the pallet P, the ON signal is given by the lock operation detecting device 7. Is output. Based on this, the control unit 10 retreats the operating rod 141 of the turning drive device 14 to the left in the figure, so that the baffle plate 8 turns counterclockwise with the sliding portion 13 as a fulcrum, and the upper surface of the cab 3 It stops when it protrudes straight from 30 in the vertical direction. Thereby, the baffle plate 8 takes the attitude | position which interrupts | blocks between the cab 3 and the fork 4. FIG. Thereby, an operator is restrained or suppressed from moving on the fork 4.

  On the contrary, when the lock bar 5 is pressed against the lower deck board d of the pallet P supported by the fork 4, the lock operation detection device 7 sends out a lock detection signal. Based on this, the control unit 10 advances the actuating rod 141 of the turning drive device 14 to the right in the figure, so that the baffle plate 8 turns counterclockwise around the sliding portion 13 and becomes horizontal. Stop. As a result, the baffle plate 8 is flush with the upper surface 30 of the cab 3. Thereby, the operator can transfer on the pallet P from the cab 3 without any obstacles.

  Next, the locking drive source 22 shown in FIG. 2 is configured to press the lock bar 5 against the pallet P based on the baffle plate 8 being in a flush position with the upper surface 30 of the cab 3. An example will be described. Constituent elements similar to those in the first or second embodiment are denoted by the same reference numerals, and detailed description and illustration thereof are omitted.

  In this embodiment, as the position detection device 9 shown in FIG. 3 (although the arrangement is omitted), in other words, when the baffle plate 8 reaches the position indicated by the phantom line in FIG. In the state where the slider 111 has reached the vicinity of the lower limit of the guide rail 112, a micro switch that contacts the baffle plate 8 or the slider 111 and sends a member detection signal is used. Alternatively, as the position detection device 9, a micro switch that sends a member detection signal in contact with the baffle plate 8 that is flush with the upper surface 30 of the cab 3 as represented by a virtual line in FIG. 5. It may be used.

  As in the first and second embodiments, immediately before the picking operation is performed, the operator can visually confirm that the pallet P is not fixed to the fork 4 by looking at the posture of the baffle plate 8 protruding from the cab 3. Can be recognized. In this state, as shown in FIG. 2, the operating rod 20 of the locking drive source 22 is retracted inward of the cylinder 21. Further, the link body 23 pivots counterclockwise in the drawing with the shaft 24 as a fulcrum according to the operating rod 20, one end is pin-connected in the middle of the link body 23, and the other end is connected to the pair of lock bars 5 via the arm portion 25. When the damper 26 pin-connected to the fork 4 retreats in the direction away from the fork 4, the pair of lock bars 5 are pivoted in the direction of lifting from the lower deck board d with the shaft 27 as a fulcrum.

  Then, when an operator who notices that the pallet P is not fixed steps on the baffle plate 8 with respect to the cab 3 by stepping on the baffle plate 8 or the like, the position detection device 9 moves the baffle plate 8. Is detected and a member detection signal is transmitted. In this way, in the process in which the baffle plate 8 protruding from the cab 3 is flush with the cab 3, the control unit 10 senses the pedaling force of the operator and moves the operating rod 121 of the elevating drive device 12 downward. The actuating rod 141 of the revolving or turning drive device 14 may be advanced. Alternatively, as the lifting drive device 12 or the turning drive device 14, a device that reversibly returns upon receiving an external force such as a stepping force may be applied.

  Further, since the control unit 10 instructs the lock drive source 22 based on the member detection signal of the position detection device 9 to advance the operating rod 20 outward of the cylinder 21, the link body 23 uses the shaft 24 as a fulcrum. Turning inside, the damper 26 moves forward toward the fork 4. As a result, the pair of lock bars 5 pivots toward the lower deck board d with the shaft 27 as a fulcrum, and the pair of lock bars 5 presses the lower deck board d.

  As described above, the operator can complete the fixing of the pallet P immediately by stepping on the baffle plate 8 while approaching the pallet P, so that the operator manually operates the switch disposed on the cab 3. Compared to the case, the picking work can be greatly speeded up.

  It should be noted that the present invention can be implemented in a mode in which various improvements, modifications, or variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

  The present invention can lock a pallet into which a fork is inserted by means of a pallet locking device, so that the pallet can be prevented from swinging, which is useful for preventing an operator from dropping on the pallet or accidental collapse of the load. is there.

(A) is a perspective view of the order picking track concerning the embodiment of the present invention, and (b) is a perspective view showing an example of operation of the principal part. The side view of the pallet locking device applied to the order picking truck concerning the embodiment of the present invention. The block diagram which shows the structure of the control apparatus applied to the order picking truck which concerns on embodiment of this invention. The front view of the principal part of the order picking truck which concerns on Example 1 of this invention. The side view of the principal part of the order picking truck which concerns on Example 2 of this invention.

Explanation of symbols

1, 1 ': Order picking truck 2: Pallet lock device 3: Driver's cab 4: Fork 5: Lock bar 6: Control device 7: Lock operation detection device 8: Baffle plate 9: Position detection device 10: Control unit 11: Guide Device 12: Elevating drive device 13: Sliding portion 14: Turning drive device P: Pallet

Claims (3)

  An order picking truck in which both a cab and a fork move up and down along a mast erected on a vehicle body, and includes a pallet locking device for fixing a pallet inserted into the fork, and between the cab and the fork A baffle plate that advances when the pallet locking device is inactive and retracts when the pallet locking device is in operation, so that the operator on the cab moves onto the fork when the pallet locking device is inactive. An order picking truck characterized by stopping.   Order picking that fixes the pallet to the fork by pressing a lock bar on a pallet supported by a fork adjacent to the cab and releases the pallet by moving the lock bar away from the pallet. In the truck, when the pallet is released, the pallet protrudes from the cab and takes a position to block between the cab and the fork. An order picking truck comprising a baffle plate that takes a single posture.   3. The order picking truck according to claim 2, further comprising guide means for mounting the baffle plate up and down on the driver's cab in an upright position, and elevating drive means for moving the baffle plate up and down.

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