JP5139487B2 - Forklift safety device - Google Patents

Description

  The present invention relates to a safety device for a forklift.

  Conventionally, forklifts have been used for shipping arrangements at shipping sites. In other words, forklifts are used to load and store packages in three to four stages according to type and store them in order to load them onto a transport vehicle such as a trailer.

  Further, Patent Document 1 describes that the distance to an obstacle such as an object or a person is measured using a sensor attached near the base of the fork, and the forward function of the forklift is braked at a preset distance. This prevents the tip of the forklift from contacting the obstacle. This sensor measures an obstacle at the same height as the fork or slightly higher than the fork to prevent the fork from colliding with an object or person. In the forklift constructed as described above, since the forward movement of the forklift is suppressed when there is an obstacle in front of the fork, it is possible to prevent an accident from occurring.

  By the way, as shown in FIG. 9, when the packages 90 are arranged using a forklift at the shipping place, if the products of the packages 90 a, 90 b, 90 c, and 90 d are misaligned, there is a possibility that the cargo collapses. There is a problem. Such positional deviation is caused by the difference Dh between the heights Ha and Hb of the luggage 90a and 90b. In addition, the loads 90a and 90b in which the positional deviation has occurred may cause the collapse of the load during traveling when they are loaded on a transport vehicle such as a trailer.

  For this reason, as shown in FIG. 10, the operator once unloads the loads 90a to 90d in the product with the forklift 91, corrects the shift of the product, lifts the loads 90a to 90d again with the forklift 91, Arrangement work is carried out by stacking on the upper stage of 90a to 90d. At this time, the operator's view is obstructed by the luggage 90e of the forklift 91, the front luggage 90a cannot be confirmed, and the luggage 90e is moved onto a tall shelf. There is a possibility that inconveniences such as a fork claw or a pallet coming into contact with the front product 90a and damaging the product 90a during the operation.

  Therefore, the transporter who operates the forklift 91 gets over the vehicle body and moves forward the forklift 91 while checking the front to stack the loads on the upper stage. At this time, the operator should be careful not to throw it out of the vehicle body, and operate with the body out of the vehicle body, so that the operation of the pedal operation such as steering wheel operation, accelerator, brake, etc. will not be stable. It is possible to induce.

  Alternatively, when the worker performs a cargo handling operation, the auxiliary worker is accompanied by another auxiliary worker, and the auxiliary worker monitors the luggage so that it is stacked straight so as not to easily collapse. Similarly, when carrying out the cargo handling work, an auxiliary worker attaches to carry out the work of stacking the luggage on the upper stage according to the instruction of the auxiliary worker.

JP 2006-16202 A

  However, by placing an auxiliary worker for each cargo handling work, a lot of manpower is required for the work, which causes a problem of increasing costs. In addition, in the case of a forklift, the fork may move forward with the fork positioned at the bottom of the floor, so it is difficult to detect obstacles by placing sensors on the lower surface of the fork. Obstacles could only be detected at the same height as the top or pallet top or fork.

  For this reason, obstacles cannot be detected when a pallet or a load is placed on the fork, and the problem of poor visibility during loading work with the load placed on the fork has not been solved.

  The present invention has been made in consideration of the above-mentioned matters, and the forklift provides a safety device for a forklift by checking the presence or absence of an obstacle in front of the lower surface of the fork with the load placed on the fork. This is the issue.

In order to solve the above problems, the first invention is a lifting bracket attached to a fork fixing bracket so as to be able to be retracted downward, and an obstacle in front of a lower end portion between the forks in a state in which the lifting bracket is projected. A non-contact measuring instrument mounted at a position where the fork can be measured, and when the fork is raised, the lifting bracket protrudes downward from the fork fixing bracket by a predetermined length, while the non-contact measuring instrument is lowered when the fork is lowered. e Bei and projecting and retracting mechanism retracting said lift bracket so as not to contact with the floor, and a notification means for notifying the front obstacle measured by the non-contact measuring device is installed in a position that can be seen from the driver's seat, The egress / retreat mechanism has one end fixed to the body of the forklift and the other end fixed to the elevating bracket to suspend the elevating bracket. A rope, a first pulley that is pivotally attached to the inner mast and configured to hook the rope, and a fork that is pivotally attached to the inner mast and positioned at the lower end. The second pulley that contacts the cable body to such an extent that the cable body is bent and pulled so that the lift bracket does not hit the floor surface, and the non-contact measurement is performed only in the protruding state of the lift bracket attached to the lower side of the lift bracket. A forklift safety device is provided , comprising a measuring device position confirmation switch for enabling the device.

In the second invention, the lifting bracket is attached to the fork fixing bracket so as to be retractable, and the obstacle located in front of the lower end portion of each fork in a state where the lifting bracket is projected can be mounted at a position where it can be measured. When the fork is raised, the elevating bracket projects downward from the fork fixing bracket by a predetermined length, while the fork is lowered so that the non-contact measuring instrument does not contact the floor. e Bei and projecting and retracting mechanism for retracting the bracket, and a notification means for notifying the front obstacle measured by the non-contact measuring device is installed in a position that can be seen from the driver's seat, the exit-retraction mechanism, one end The body of the forklift, the other end fixed to the elevating bracket, respectively, and a rope for hanging the elevating bracket and the inner mass A first pulley configured to be pivotably attached to the cable body, and the lifting bracket is pivotally attached to the inner mast so that the fork is positioned at a lower end portion. A second pulley that comes into contact with the cable body to the extent that the cable body is bent and pulled so as not to hit, and a measurement that is attached to the lower side of the lift bracket and that enables the non-contact measuring device only in the protruding state of the lift bracket A forklift safety device is provided, comprising a device position confirmation switch (claim 2).

  Since the lifting bracket shown in claims 1 and 2 is attached to the bottom of the fork fixing bracket so as to be retractable by a retracting mechanism, the non-contact measuring device provided on the lifting bracket is a fork between forklifts. Obstacles ahead can be measured with a non-contact measuring instrument. Further, when the fork is raised, the elevating bracket projects the elevating bracket downward from the fork fixing bracket by a predetermined length, while the elevating bracket does not contact the floor when the fork is lowered. Therefore, the non-contact measuring device attached to the lifting bracket does not collide with the floor surface. The advancing / retracting mechanism may use a cylinder that retracts the lifting bracket only when the fork is positioned at the lower end in accordance with the operation of the fork. Since the notification means notifies a front obstacle measured by the non-contact measuring device at a position that can be confirmed from the driver's seat, the operator can check the presence or absence of the obstacle using the notification means.

  Therefore, even if the worker's field of view may be obstructed by the package being transported, when the tip of the fork or the tip of the pallet is likely to collide with the obstacle, this can be confirmed by the notification means. Therefore, it is not necessary for the worker to perform a dangerous operation such as getting out of the forklift in order to confirm an obstacle ahead, and no auxiliary worker is required.

As shown in claim 1, when the non-contact measuring device is provided at the lower end portion between the forks, it is possible to measure the obstacle in front of the forklift in a balanced manner with a simple configuration. On the other hand, as shown in claim 2, the obstacle in front of the lower end portion of each fork is measured by each non-contact measuring device, and any one non-contact measuring device measures the obstacle in front of the fork. in the case where the notification means has by Uni configured to notify an obstacle when, it is possible to avoid contact of the baggage and the fork more reliably.

Further, the retracting mechanism is configured such that one end is fixed to the vehicle body of the forklift, the other end is fixed to the lifting bracket and the lifting bracket is suspended, and the lifting mechanism is rotatably attached to the inner mast so as to hook the rope. The first pulley configured as described above, and a rope attached to the inner mast so as to be pivotable so that the lifting bracket is bent and pulled so that the lifting bracket does not hit the floor surface with the fork positioned at the lower end. a second pulley in contact with the body, since the instrument position confirmation switch and the Bei Eteiru only to enable the non-contact measuring device is in the protruding state of the mounted and lift bracket on the lower side of the lift bracket, the inner mast Since the lifting bracket is suspended by the rope wound around the attached first pulley, the height position of the fork and the lifting bracket is adjusted. So, it is possible to move the lift bracket vertically to follow the height position of the fork. That is, when the fork is raised, the obstacle can be measured in a state where the non-contact measuring device is fixed at a relative position where the non-contact measuring device protrudes from the lower surface of the fork fixing bracket.

  In addition, when the fork is in the lowest position, the lifting pulley moves back into the fork rail fixing bracket because the second pulley comes into contact with the rope body to such an extent that it pulls the cable body, so that the non-contact measuring instrument also enters the fork rail fixing bracket. A gap is generated between the floor surface and the non-contact measuring device. That is, the non-contact measuring device does not collide with the floor surface. The cord is preferably a wire, but may be a chain or rope. Moreover, when the rope is a chain, the pulley may be a sprocket.

When the non-contact measuring device is a light detection sensor that measures distance using light (Claim 3 ), the distance is measured using light that does not diffuse, so that more accurate distance measurement can be performed. And reliability is improved. In addition, it is preferable that the light detection sensor has a simple configuration that measures a distance using a single ray like a photoelectric sensor, but this photosensor measures a multipoint distance using a plurality of rays. It may be. Further, it may be an object that measures reflected light accompanying light irradiation, or an object that measures radiated light such as infrared light. When the light detection sensor detects an obstacle at a distance likely to come into contact with the fork in consideration of the length of the fork, a warning is issued using the notification means.

When the non-contact measuring instrument is an ultrasonic detection sensor that measures a distance using ultrasonic waves (Claim 4 ), the distance in a predetermined region may be measured using ultrasonic waves. Since some diffusion occurs in the ultrasonic wave, it is possible to measure the presence or absence of an obstacle in a predetermined area. By adjusting this area, an obstacle in front of the forklift can be detected appropriately. When the ultrasonic detection sensor detects an obstacle at a distance likely to come into contact with the fork in consideration of the length of the fork, a warning is issued using the notification means.

  Note that a light detection sensor and an ultrasonic detection sensor may be used in combination as the non-contact measuring device.

When the non-contact measuring device includes a camera that images the vicinity of the tip of the fork (Claim 5 ), an obstacle in front can be confirmed by an image obtained by imaging the front from the lower end of the fork. Note that the image captured by the camera is a two-dimensional detection of the light reflected by the obstacle, but the image is captured by detecting the reflected light by irradiating infrared light or the like from the camera side. Even if it exists, you may image using the far infrared rays radiated | emitted from an obstruction. The captured image can be displayed on a monitor as notification means. A signal processing circuit that analyzes the captured image and determines that there is an obstacle that may collide forward, and outputs a warning from the notification means when it is determined by the signal processing circuit that there is an obstacle. You may make it do. The camera may be attached together with the light detection sensor and the ultrasonic detection sensor.

When the notification means includes a sounding device such as a display device, a buzzer, or a speakerphone (Claim 6 ), a notification when there is an obstacle in front of the fork is notified by a warning sound (melody) and / or warning sound. As a result, the operator can check the presence or absence of an obstacle without moving his eyes from the operation of the forklift, so the work efficiency is good.

In the case where the notification means includes a display device such as a display for displaying a warning or a warning lamp (Claim 7 ), the state of the obstacle can be visually confirmed, so the certainty increases. In particular, when the display device is a display, an obstacle can be confirmed as if the operator is looking through the lower end of the forklift.

  As described above, according to the present invention, a non-contact measuring device for confirming the presence or absence of an obstruction (baggage) in front of the fork is attached in a state where the fork lift protrudes from the lower end of the fork lift. You can check the presence or absence of objects. In addition, the forklift operator can check the information on the confirmation device at the driver's seat and confirm the presence or absence of obstacles in front of the driver's seat.

  At the descending end of the fork (claw), a confirmation device for confirming obstacles is stored in the fork and has a retreat function. When the fork is raised, a confirmation device appears at the bottom of the fork, so that an obstacle can be confirmed, and safety is improved accordingly.

It is a figure explaining the whole structure and operation | movement of a forklift which attached the safety device of the forklift of this invention. It is a figure explaining the structure of the safety device of the forklift which concerns on 1st Embodiment. It is a figure explaining operation | movement of the safety device of the said forklift. It is another figure explaining operation | movement of the safety device of the said forklift. It is a figure which shows the structure of the safety device of the forklift which concerns on 2nd Embodiment. It is a figure which shows the structure of the safety device of the forklift which concerns on 3rd Embodiment. It is a figure explaining the whole structure and operation | movement of a forklift which attached the safety device of the forklift which concerns on 4th Embodiment. It is a figure which shows the structure of the safety device of the forklift shown in FIG. It is a figure which shows the example of the load sorted by a forklift. It is a figure which shows the whole structure of the conventional forklift.

  Hereinafter, the configuration and operation of the forklift safety device 1 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a configuration of a forklift 2 to which a forklift safety device 1 of the present invention is attached. The forklift 2 conveys and loads loads 4a, 4b and 4c placed on a pallet 3.

  As shown in FIGS. 2 to 4, the safety device 1 for a forklift according to the first embodiment includes an elevating bracket 5 attached to a fixing bracket 2 b of a fork 2 a so as to be retractable downward, and projects the elevating bracket 5. The photoelectric sensor 6 as an example of a non-contact measuring device mounted at a position where an obstacle in front of the lower end portion between the forks 2a can be measured in the state where the fork 2a is lifted, and the lifting bracket 5 is fixed to the fork when the fork 2a is raised A retracting mechanism 7 (FIGS. 3 and 4 only) that protrudes downward from the bracket 2b by a predetermined length while retracting the lifting bracket 5 so that the photoelectric sensor 6 does not contact the floor when the fork 2a is lowered. And a notification means that is installed at a position that can be confirmed from the driver's seat and that notifies the front obstacle measured by the non-contact measuring instrument. Comprising an alarm lamp 8b as an example of a horn-type loudspeaker 8a and a display device as a, and a control unit 9.

  The forklift 2 has an inner mast 2c that slidably holds the fork fixing bracket 2b, and an outer mast 2d that slidably holds the inner mast 2c. The outer mast 2d can be tilted to the vehicle body 2e. Installed on. The outer mast 2d, the inner mast 2c, and the fork fixing bracket 2b are interlocked by a chain or the like.

  The elevating bracket 5 can be switched between two states: a state in which it is projected below the fork fixing bracket 2b and a state in which it is retracted so as to be housed in the fork fixing bracket 2b. The fork fixing bracket 2b is slidable in the vertical direction. Reference numeral 5a denotes a measuring instrument position confirmation switch such as a limit switch for detecting whether or not the elevating bracket 5 protrudes downward from the fork fixing bracket 2b. A signal indicating whether or not the lifting bracket 5 is in a state of projecting downward from the fork fixing bracket 2 b is sent to the control unit 9.

  The photoelectric sensor 6 is attached to the lower end portion of the elevating bracket 5. When the fork 2 b is raised, the photoelectric sensor 6 protrudes below the fork 2 b between the two forks (FIGS. 1 and 2). 4), the laser beam B is irradiated straight ahead and the reflected light is used to measure the distance L0 to the obstacle (the luggage 4b). The photoelectric sensor 6 outputs information on the measured distance L0 to the control unit 9 in the form of an electrical signal.

  As shown in FIGS. 3 and 4, the retracting mechanism 7 is, for example, a wire as an example of a cable body in which one end is fixed to the vehicle body 2 e of the forklift 2 and the other end is fixed to the lifting bracket 5 and the lifting bracket 5 is suspended. 10, a first pulley 11 that is rotatably attached to the inner mast 2 c and configured to hook the rope, and a fork 2 a that is rotatably attached to the inner mast 2 c and is positioned at the lower end. In this state, the lifting bracket 5 and the photoelectric sensor 6 are positioned so that the wire 10 is bent and pulled so that the lifting bracket 5 and the photoelectric sensor 6 are lifted from the floor surface FL by a height h1, and the fork 2a is positioned at the lower end. A first pulley 13 that is rotatably attached to the forklift main body 2e so as to be higher than the first pulley 11 by a height h2 in a state of being moved. Obtain.

  Further, the positional relationship of the pulleys 11 to 13 with the fork 2a positioned at the lowermost end is such that the upper end of the third pulley 13 with respect to the upper end of the first pulley 11 (if the third pulley 13 is omitted, the main body The lower end of the second pulley 12 with respect to the upper end of the first pulley 11 is attached to a position lowering by the height h3. In this case, in a state where the fork 2a is positioned at the lowermost end, it is possible to pull the wire 10 by at least the length Lh shown in the formula (1).

  Lh = h3 × 2 + h2 Formula (1)

  The horn type speaker 8a is attached at a position where it can be easily heard by a driver operator of the forklift 2, and in this embodiment, the horn type speaker 8a is attached on an unobstructed roof. Further, the alarm lamp 8a is attached to a position that is noticeable to the driver's eyes, and is attached to the front protective frame in this embodiment. In addition, although the sound generated from the horn type speaker 8a can be reduced to an uncomfortable feeling by making it a melody, it may be a sound having a warning meaning such as a buzzer sound, a siren or a voice. That is, the sound generation device may be a buzzer as well as a speaker. Similarly, although an example in which the display device is an alarm lamp is shown, a display device such as a display for displaying an alarm message may be used.

  The control unit 9 detects the protruding state of the photoelectric sensor 6 by the measuring instrument position confirmation switch 5a, and the distance L0 measured by the photoelectric sensor 6 adds a distance (arbitrary) for ensuring safety to the length L1 of the fork 2a. When it is smaller than the above value, it is judged that there is an obstacle ahead, and a melody of a warning sound is generated on the horn type speaker 8a and at the same time the alarm lamp 8a is turned on, which is easily formed using a relay circuit or the like. However, it may be formed using a PLC or a microcomputer.

  The wire 10 is preferable because it has sufficient strength to suspend the lifting bracket 5 and the like and flexibility to bend along the pulleys 11 to 13, but a rope or chain may be used instead of the wire. Needless to say.

  The forklift safety device 1 configured as described above includes the above-described retracting mechanism 7 so that the second pulley 12 is attached to the wire 10 in a state where the fork 2a is disposed at the lowermost end as shown in FIG. Are brought into contact with each other, and the wire 10 is bent in an approximately M shape in the drawing, so that the wire 10 can be pulled at least by the length Lh, and the photoelectric sensor 6 can be lifted from the floor surface FL by the height h1. At this time, since the measuring instrument position confirmation switch 5a detects that the photoelectric sensor 6 is in the retracted state, the control unit 9 does not wastefully output an alarm.

  Further, as shown in FIG. 4, when the fork 2a is raised, the second pulley 12 does not bend the wire 10, so that the photoelectric sensor 6 can protrude from the lower end of the fork 2a. Since the photoelectric sensor 6 protruding from the lower end of the fork 2a is suspended by a wire 10 wound around a first pulley 11 rotatably attached to the inner mast 2c, the photoelectric sensor 6 follows the vertical movement of the fork 2a. By moving in the vertical direction, the relative position of the photoelectric sensor 6 with respect to the fork 2a can be fixed. Therefore, the photoelectric sensor 6 can always confirm that there is no obstacle ahead in the lower end portion of the fork 2a.

  At this time, the position of the laser beam B irradiated from the photoelectric sensor 6 is preferably slightly lower than the lower end of the pallet 3 into which the fork 2a is inserted. As a result, the operator can confirm the situation in which the lower end of the pallet 3 is likely to come into contact with an obstacle such as the front luggage 4a, 4b by lighting the alarm melody of the horn type speaker 8a and the alarm lamp 8b. Even if the fork 2a and the pallet 3 cannot be visually confirmed by the load 4c (see FIG. 1), the contact that causes the collapse of the load can be avoided.

  That is, when the photoelectric sensor 6 detects a front obstacle, an alarm melody flows from the horn type speaker and an alarm lamp is lit, so that the operator moves forward after confirming that the alarm is stopped by raising the fork 2a slightly. The luggage 4c can be stacked.

  According to the forklift safety device 1 of the present invention, safety confirmation can be performed in a state in which the load 4c is placed on the fork 2a, which was not possible with the conventional device, which is extremely useful.

  FIG. 5 is a view showing a forklift safety device 1a according to the second embodiment, which is a modification of the first embodiment. In the following description, members described using the same reference numerals as those in FIGS. 1 to 4 are the same or equivalent members, and thus detailed description of the configuration is omitted.

  As shown in FIG. 5, the non-contact measuring device attached to the raising / lowering bracket 5 may be the ultrasonic detection sensor 6a. The ultrasonic detection sensor 6a detects an obstacle in front using the ultrasonic wave reflected between the fork 2a and the like by irradiating the ultrasonic wave W between the forks 2a in the plan view and below the fork 2a. .

  By using the ultrasonic detection sensor 6a as in the present embodiment, the detection area can be expanded, and an obstacle in front of the forks 2a on both sides can be detected by the single ultrasonic detection sensor 6a. . That is, sufficient safety can be ensured with the simplest possible configuration.

  FIG. 6 is a view showing a forklift safety device 1b according to a third embodiment, which is a modification of the first and second embodiments. In the following description, members described using the same reference numerals as those in FIGS. 1 to 5 are the same or equivalent members, and thus detailed description of the configuration is omitted.

  As shown in FIG. 5, the non-contact measuring device attached to the lifting bracket 5 may be photoelectric sensors 6b and 6c arranged at the lower end portions of the left and right forks 2a according to the position of the forks 2a. The photoelectric sensors 6b and 6c detect a front obstacle by irradiating a laser beam B on the extension line of the fork 2a in plan view. The control unit 9 outputs an alarm when one of the photoelectric sensors 6b and 6c detects an obstacle. Obstacle detection accuracy is improved and reliability is excellent.

  7 and 8 are views showing a forklift safety device 1c according to a fourth embodiment of the present invention. Also, in the description of FIGS. 7 and 8, the members described using the same reference numerals as those in FIGS. 1 to 6 are the same or equivalent members, and thus detailed description of the configuration is omitted.

  The forklift safety device 1c according to the fourth embodiment is provided with a single camera 6e as an example of a non-contact measuring device at a position between the bottom end of the elevating bracket 5 and the base end of the fork 2a in plan view. The present embodiment is different from the first to third embodiments in that a monitor 8c is provided as a display device that displays an image captured by the camera 6e as an example of a notification unit.

  The camera 6e captures an image having an imaging range A from the lower end of the fork 2a that is difficult for the operator to reach. The control unit 9 includes a signal processing device such as a microcomputer and is captured by the camera 6e. The horn type speaker 8a is used to output an alarm sound when a state where there is an obstacle ahead is detected by analyzing the image using the obtained image. When the horn type speaker 8a is omitted, the control unit 9 may be a relay circuit.

  By configuring as in the present embodiment, a portion that becomes a blind spot for the operator can be confirmed by the monitor 8c, so that sufficient safety can be ensured while having an extremely simple configuration.

DESCRIPTION OF SYMBOLS 1,1a-1c Forklift safety device 2 Forklift 2a Fork 2b Fork fixing bracket 5 Lifting bracket 5a Measuring device position confirmation switch 6, 6a-6e Non-contact measuring device 7 Retracting mechanism 8a-8c Notification means 10 Rook 11 1 pulley 12 2nd pulley

Claims (7)

A lifting bracket attached to the fork fixing bracket so as to be able to be withdrawn downward;
A non-contact measuring instrument attached at a position where an obstacle in front of the lower end portion between the forks can be measured in a state in which the lifting bracket is projected;
When the fork is raised, the elevating bracket protrudes downward from the fork fixing bracket by a predetermined length, and when the fork is lowered, the elevating / retracting mechanism retracts the elevating bracket so that the non-contact measuring instrument does not contact the floor. When,
E Bei and notification means installed in a position that can be seen from the driver's seat to advertise an obstacle in front of which is measured by the non-contact measuring device, the output retraction mechanism has one end the body of the forklift, the other end said lifting A cable body fixed to each of the brackets to suspend the lifting bracket, a first pulley that is rotatably attached to an inner mast and is configured to hang the cable body, and is rotatably attached to the inner mast. A second pulley abutting on the cable body to such an extent that the cable body is bent and pulled so that the lift bracket does not hit the floor surface while the fork is located at the lower end, and attached to the lower side of the lift bracket safety device for a forklift characterized in that it comprises a measuring device located confirmation switch to enable the non-contact measuring device only in the projecting state of the lift bracket An elevating bracket attached to the fork fixing bracket so as to be able to move in and out;
A non-contact measuring instrument attached at a position where each obstacle can be measured in front of the lower end portion of each fork in a state in which the lifting bracket is projected;
When the fork is raised, the elevating bracket protrudes downward from the fork fixing bracket by a predetermined length, and when the fork is lowered, the elevating / retracting mechanism retracts the elevating bracket so that the non-contact measuring instrument does not contact the floor. When,
E Bei and notification means installed in a position that can be seen from the driver's seat to advertise an obstacle in front of which is measured by the non-contact measuring device, the output retraction mechanism has one end the body of the forklift, the other end said lifting A cable body fixed to each of the brackets to suspend the lifting bracket, a first pulley that is rotatably attached to an inner mast and is configured to hang the cable body, and is rotatably attached to the inner mast. A second pulley abutting on the cable body to such an extent that the cable body is bent and pulled so that the lift bracket does not hit the floor surface while the fork is located at the lower end, and attached to the lower side of the lift bracket safety device for a forklift characterized in that it comprises a measuring device located confirmation switch to enable the non-contact measuring device only in the projecting state of the lift bracket The forklift safety device according to claim 1, wherein the non-contact measuring device is a light detection sensor that measures a distance using light. The forklift safety device according to claim 1, wherein the non-contact measuring device is an ultrasonic detection sensor that measures a distance using ultrasonic waves. The forklift safety device according to any one of claims 1 to 4 , wherein the non-contact measuring device includes a camera that captures an image of the vicinity of the tip of the fork. The forklift safety device according to any one of claims 1 to 5 , wherein the notification means includes a sounding device such as a display device, a buzzer, and a speakerphone. The forklift safety device according to any one of claims 1 to 6 , wherein the notification means includes a display device such as a display for displaying a warning and a warning lamp.

Images