JP5506198B2 - forklift - Google Patents

Description

  The present invention relates to a forklift, and more particularly to a forklift having a laser marker function for facilitating insertion of a fork part into a pallet.

  When carrying a load by a forklift, it is usually performed via a pallet, and a fork insertion port is provided on the pallet, and the fork is inserted into the insertion port when the load is transported.

  In order to easily insert the fork into the insertion port, the laser marker is irradiated from the fork side to the front beam material of the pallet, more precisely, the front beam material at the middle position between the left and right insertion ports. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 11-5700

  As described above, in order to facilitate the insertion into the insertion port of the fork, the laser marker is irradiated on the front spar of the pallet. This laser marker is provided in the driver's seat of the forklift. The switch is turned on and off.

  By the way, since the laser marker is turned on and off by the driver, even if the laser marker is unnecessary, it may be turned on, which is useless and the laser beam may enter the eyes of other workers. Then, there is a problem of adversely affecting the body.

  Therefore, an object of the present invention is to provide a forklift that can irradiate a laser marker only when necessary.

In order to solve the above-mentioned problems, a forklift according to claim 1 of the present invention includes a lifting body that is freely movable up and down on a mast body that is disposed at a front portion of a vehicle body, and a luggage that is provided on the lifting body. A forklift having a pair of left and right forks that can be operated, and a driver's seat provided with operation levers for lift, tilt, etc.
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, a travel detector capable of detecting the running state, such as forward and backward of the vehicle body, and a laser control unit for performing on-off control of the laser irradiator ,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A traveling state determination section which inputs a driving signal from said driving detector the running state to determine whether to continue a predetermined time or more,
The traveling state determination unit includes an off signal output unit that outputs an off signal to the laser irradiator when it is determined that the traveling state continues for a predetermined time or more.

A forklift according to a second aspect of the present invention is a pair of left and right lifting bodies that can be lifted and lowered on a mast body that is disposed at the front of the vehicle body, and a pair of left and right that is provided on the lifting body and can hold a load. A forklift having a fork, and a driver's seat provided with operation levers for lift, tilt, etc.
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, and a laser control unit for performing on-off control of the laser irradiator,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A speed determination unit that inputs a speed signal from a travel speed detector of the vehicle body and determines whether the travel speed is greater than or equal to a predetermined value;
An off signal output unit that outputs an off signal to the laser irradiator when the traveling speed is determined to be equal to or higher than a predetermined value by the speed determination unit is provided.

Further, the forklift according to claim 3 of the present invention is a pair of left and right lifting and lowering bodies provided on the mast body disposed at the front of the vehicle body so as to be able to move up and down and capable of holding a load. A forklift having a fork, and a driver's seat provided with operation levers for lift, tilt, etc.
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, and a laser control unit for performing on-off control of the laser irradiator,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A non-insertion operation detector for detecting a non-insertion operation state to a pallet insertion port by a fork by inputting an operation signal of the ascending or descending operation of the lifting body;
When the non-insertion operation state is detected by the non-insertion operation detection unit, an off signal output unit that outputs an off signal to the laser irradiator is provided.

  According to the configuration of each forklift, when the laser irradiator is turned on by the laser irradiation operation of the operation lever and the traveling state of the forklift is moving forward and backward, the forklift traveling speed exceeds a predetermined value. For example, the laser irradiator is automatically turned off when the vehicle is in a normal running state or when the lifting body moves up or down, so it is necessary to provide an on / off switch for the laser irradiator. In addition, since the off operation is automatically performed, the driver does not need to be aware of the off operation of the laser irradiator. That is, since the laser irradiator is automatically turned off, adverse effects on surrounding workers due to the irradiation of the laser light can be reduced, and the driver can easily perform the operation.

1 is a schematic side view of a forklift according to an embodiment of the present invention. It is a perspective view which shows schematic structure of the carriage in the forklift. It is a schematic perspective view of a pallet. It is a block diagram explaining the laser marker function in the forklift. It is a block diagram which shows schematic structure of the laser control part in the forklift. It is a model side view which shows special operation of the operation lever for lifts in the same forklift.

Hereinafter, a forklift according to an embodiment of the present invention will be described with reference to FIGS.
First, the configuration of the forklift will be briefly described.
As shown in FIG. 1, this forklift 1 generally includes a vehicle main body 4 in which a traveling wheel 2 is provided at a lower portion and a driver's seat 3 is provided at an upper portion, and a vertical position at a front portion of the vehicle main body 4. An outer mast member 5 supported (arranged) so as to be tiltable in the plane, an inner mast member 6 held by the outer mast member 5 so as to be movable up and down, and an inner mast member 6 disposed so as to be movable up and down. A carriage 7 which is a lifting body, a pair of left and right forks 8 which are provided on the front side of the carriage 7 and can hold a load, and is provided across the carriage 7 and the outer mast member 5, and an intermediate portion is the inner side. A chain 10 that is wound (wound) around a sheave 9 that is a guide wheel provided on the upper portion of the mast member 6 and that holds the carriage 7, and is fixedly supported by the outer mast member 5 and is supported on the inner mast. A lifting / lowering cylinder device 11 that lifts and lowers the outer member 6 with respect to the outer mast member 5, and a tilting cylinder device 12 that is provided across the outer mast member 5 and the vehicle body 4 to tilt the outer mast member 5. It is composed of

  Therefore, when the inner mast member 6 is lifted and lowered by the lifting cylinder device 11, the carriage 7, that is, the fork 8 is lifted and lowered via the chain 10 by the lifting and lowering of the sheave 9. The elevating cylinder device 11 is arranged on the left and right of the outer mast member 5, and the chain 10 is also arranged on the left and right.

Here, the configuration of the carriage 7 will be described in detail with reference to FIG.
The carriage 7 is schematically attached to a pair of left and right lift brackets 13 and upper and lower connecting plates 14 (14A, 14B) that are attached to the lift brackets 13 in an integrated manner. ), Left and right end plates 15 provided between the end portions of the upper and lower connecting plates 14, and a support shaft that is mounted horizontally between the both end plates 15 and supports the left and right forks 8. The member 16 is comprised. FIG. 2 shows a configuration example of the carriage and, of course, is not limited to such a configuration.

  In the forklift 1, when the pallet 17 is lifted by the fork 8, at least the fork 8 can be easily moved to the insertion port 17b of the pair of left and right forks 8 formed at the left and right positions of the front beam 17a. A laser marker function for turning the laser marker function on is performed by an operation lever, and the off operation is automatically performed. In addition, the schematic perspective view of the pallet 17 is shown in FIG.

Hereinafter, a configuration related to the laser marker function will be described with reference to FIG.
In other words, the driver's seat 3 of the vehicle body 4 is provided with various operation levers such as a forward / reverse operation lever, a lift operation lever 21, a tilt operation lever, and the like (in FIG. 1, the lift operation lever). The forklift 1 also includes a lifting / lowering motion detector (not shown, specifically, an operation that can detect the normal lifting motion of the lift operating lever 21 (that is, ascending motion or descending motion). A limit switch that can detect the tilt position of the lever in the front-rear direction is used) and special operations other than normal operations, such as an operation that moves twice in the forward direction (this is an example of a laser irradiation operation) Special operation detector (which can also be referred to as an irradiation operation detector, for example, a limiter that can detect the tilting position of the operation lever in the forward direction (ie, the front-rear direction). Or a limit switch that can detect the operation position of a valve that is operated by an operation lever) 22 and a travel detector that can detect a travel state such as forward or reverse of the vehicle body 4 (for example, rotation) A detector or a limit switch that can detect the tilting position of the forward / reverse operation lever) 23 and an intermediate position between the pair of left and right forks 8 (for example, the lower end of one lift bracket 13). A laser irradiator 24 that can irradiate laser light forward and parallel to the fork 8 and detection signals from the detectors 22 and 23 are input to turn on / off the laser irradiator 24 (control). And a laser control unit 25. The laser light R emitted from the laser irradiator 24 is spread in the horizontal direction at a predetermined angle as shown in FIG. That is, the laser beam R is irradiated radially (or fan-shaped).

  When the detection signal from the special operation detector 22 is input to the laser control unit 25 as shown in FIG. 5, an ON operation signal for irradiating the laser irradiator 25 with laser light is output. When a signal output unit 26 and a travel signal that is a detection signal from the travel detector 23 are input, a timer 27 that measures the duration of the signal is input, and a travel signal from the travel detector 23 is also input and measured by the timer 27. A traveling state determination unit 28 for determining whether or not the time has continued for a set time or longer (for example, about 10 seconds or more), a state in which a traveling signal is input to the traveling state determination unit 28, and a timer 27 And an off signal output unit 29 for outputting an off signal for stopping the irradiation of the laser beam to the laser irradiator 24 when the measurement time of the laser beam continues for a set time or longer. It is.

  In the above configuration, when the load W placed on the pallet 17 is transported by the forklift 1, it is necessary to insert the tip of the fork 8 into the left and right insertion ports 17b formed in the front beam 17a of the pallet 17. is there. At this time, as shown in FIG. 6, the driver moves the operation lever 21 for lifting twice toward the front side (an operation like a double click of a mouse in a personal computer).

  When the detection signal from the special operation detector 22 is input to the on signal output unit 26 of the laser control unit 25 by this inching, an on signal is output from the on signal output unit 26 to the laser irradiator 24, Laser light R is irradiated from between the forks 8 so as to spread forward and to the left and right.

  When the laser beam R is irradiated, the driver applies the height of the fork 8 to the laser beam R at the insertion port 17b of the pallet 17 (to be exact, it hits the center in the height direction of the insertion port 17b). After the forklift 1 is moved after the forklift 1 is moved so that the fork 8 is positioned at the center of the left and right of the front beam 17a of the pallet 17, the fork 8 is moved into the insertion port of the pallet 17. It will be naturally guided to 17b. After the fork 8 is inserted into the insertion port 17b, the pallet 17 on which the load W is placed is lifted and the forward / backward operation lever is operated to start traveling to a predetermined place.

  When the forklift 1 travels, a travel signal from the travel detector 23 is input to the travel state determination unit 28, and the timer 27 is activated. When the travel state exceeds the set time, a load loading operation is performed. At the end, it is determined that the vehicle is in a normal traveling state, that is, it is determined that the fork is in a non-insertion state (or a non-insertion operation state), and an OFF signal is output from the OFF signal output unit 29 to the laser irradiator 24 Is done.

  As described above, the laser irradiator 24 is turned on by a special operation of the lift operating lever 21 and the laser irradiator 24 is automatically turned off when the forklift 1 is in a normal traveling state. There is no need to bother to provide an on / off switch for the laser irradiator, and since the off operation is automatically performed, the driver does not need to be aware of the off operation of the laser irradiator 24. That is, since the turning off of the laser irradiator 24 is automatically performed, adverse effects on surrounding workers due to the irradiation of the laser light can be reduced, and the operation becomes easy for the driver.

  By the way, in the above embodiment, it has been described that when the forklift travel state continues for a set time or longer, it is determined that the fork is in a non-insertion state and the laser irradiator is turned off. Even when the speed becomes equal to or higher than the set speed, it may be determined that the fork is not plugged in and the laser irradiator is turned off.

  In this case, the forklift is provided with a speed detector for the vehicle body, and a speed determination unit that inputs a speed signal that is a detection signal from the speed detector to the laser control unit to determine whether or not the set speed is exceeded. Is provided. When the set speed is low, the laser irradiator may be turned off when a traveling speed exceeding the set speed continues for a set time or more by using a timer together.

The forklift according to this configuration will be briefly described as follows.
That is, the forklift includes an elevating body that can be raised and lowered on a mast body arranged at the front portion of the vehicle main body, and a pair of left and right forks that are provided on the elevating body and can hold a load, It is a forklift in which operation levers for lift, tilt, etc. are provided in the driver's seat,
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, and a laser control unit for performing on-off control of the laser irradiator,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A speed determination unit that inputs a speed signal from a travel speed detector of the vehicle body and determines whether the travel speed is greater than or equal to a predetermined value;
An off signal output unit that outputs an off signal to the laser irradiator when the traveling speed is determined to be equal to or higher than a predetermined value by the speed determination unit is provided.

Further, even when the lift operation, that is, the lifting / lowering operation of the load is started, it may be determined that the fork is not inserted and the laser irradiator is turned off.
The forklift in this case will be briefly described as follows.

That is, the forklift includes an elevating body that can be raised and lowered on a mast body arranged at the front portion of the vehicle main body, and a pair of left and right forks that are provided on the elevating body and can hold a load, It is a forklift in which operation levers for lift, tilt, etc. are provided in the driver's seat,
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, and a laser control unit for performing on-off control of the laser irradiator,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A non-insertion operation detector for detecting a non-insertion operation state to a pallet insertion port by a fork by inputting an operation signal of the ascending or descending operation of the lifting body;
When the non-insertion operation state is detected by the non-insertion operation detection unit, an off signal output unit that outputs an off signal to the laser irradiator is provided.

DESCRIPTION OF SYMBOLS 1 Forklift 3 Driver's seat 4 Vehicle main body 7 Carriage 8 Fork 11 Lifting cylinder device 12 Tilt cylinder device 13 Lift bracket 14 Connecting plate 17 Pallet 17b Insertion port 21 Lift operation lever 22 Special operation detector 23 Travel detector 24 Laser Irradiator 25 Laser control unit 26 On signal output unit 27 Timer 28 Running state determination unit 29 Off signal output unit

Claims (3)

A lifting body provided on the mast body arranged at the front part of the vehicle body so as to be able to move up and down, and a pair of left and right forks which are provided on the lifting body and can hold a load, and for the lift to the driver's seat, A forklift provided with an operation lever for tilt, etc.
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, a travel detector capable of detecting the running state, such as forward and backward of the vehicle body, and a laser control unit for performing on-off control of the laser irradiator ,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A traveling state determination section which inputs a driving signal from said driving detector the running state to determine whether to continue a predetermined time or more,
A forklift, comprising: an off signal output unit that outputs an off signal to the laser irradiator when the traveling state determination unit determines that the traveling state has continued for a predetermined time or more. A lifting body provided on the mast body arranged at the front part of the vehicle body so as to be able to move up and down, and a pair of left and right forks which are provided on the lifting body and can hold a load, and for the lift to the driver's seat, A forklift provided with an operation lever for tilt, etc.
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. comprising to a special operation detector for outputting a detection signal when the, and a laser control unit for performing on-off control of the laser irradiator,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A speed determination unit that inputs a speed signal from a travel speed detector of the vehicle body and determines whether the travel speed is greater than or equal to a predetermined value;
A forklift, comprising: an off signal output unit that outputs an off signal to the laser irradiator when the speed determining unit determines that the traveling speed is equal to or greater than a predetermined value. A lifting body provided on the mast body arranged at the front part of the vehicle body so as to be able to move up and down, and a pair of left and right forks which are provided on the lifting body and can hold a load, and for the lift to the driver's seat, A forklift provided with an operation lever for tilt, etc.
A laser irradiator capable of irradiating a laser beam in front of and in parallel with the fork is provided at an intermediate position between the pair of forks in the elevator, and a laser irradiation operation which is a special operation other than the normal operation of the operation lever is detected. A special operation detector that outputs a detection signal and a laser control unit that performs on / off control of the laser irradiator,
An on signal output unit for inputting the detection signal to the laser control unit and outputting an on signal for irradiating the laser irradiator with laser light;
A non-insertion operation detector for detecting a non-insertion operation state to a pallet insertion port by a fork by inputting an operation signal of the ascending or descending operation of the lifting body;
A forklift, comprising: an off signal output unit that outputs an off signal to the laser irradiator when a non-insertion operation state is detected by the non-insertion operation detection unit.

Images