JP3604643B2 - Control device for electric equipment for forklift - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lift bracket that moves up and down by being guided by a mast erected on a body of a forklift, or an auxiliary electric device for a forklift that performs on / off control of an auxiliary electric device attached to a fork attached to the lift bracket. It relates to a control device.
[0002]
[Prior art]
In FIG. 13 showing a conventional reach-type forklift, reference numeral 1 denotes a vehicle body that is driven by a driving motor, reference numeral 2 denotes a battery mounted on the vehicle body 1, reference numeral 3 denotes a mast erected at the front of the vehicle body 1, and reference numeral 4 denotes a mast 3 Is a pair of left and right L-shaped forks attached to the lift bracket 4, and a built-in hydraulic motor (not shown) of the vehicle body 1 is operated by a driver. The lift cylinder (not shown) expands and contracts by being driven by the battery 2, and the lift bracket 4 moves up and down along the mast 3 together with the fork 5.
[0003]
By the way, in this type of forklift, it has been proposed that the insertion position of the fork 5 can be confirmed so that the loading operation at the high elevation position can be easily performed. A laser pointer (not shown) made of a semiconductor laser is attached as an attached electric device, and the driver visually observes a laser beam emitted from the laser pointer near a pallet insertion port in front of the fork 5 so that the driver can visually check the position of the fork 5. It has been made possible to check the insertion position. Conventionally, power supply to an attached electric device such as a laser pointer has been performed through a masted electric wire.
[0004]
[Problems to be solved by the invention]
However, in the conventional wire connection, the mast 3, which is a movable portion, has to be relayed, and the wire may be fatigued and disconnected due to repeated bending. Also, the wiring work is troublesome. Therefore, the applicant of the present application has previously proposed a method of supplying power using a switch 9 including a fixed contact portion 7 and a movable contact portion 8 as shown in FIGS. 14 and 15, respectively.
[0005]
FIG. 14 shows the fixed side contact portion 7, which is attached to the lower end of the mast 3 and has a rectangular parallelepiped fixed side main body 70 in which vertical groove-shaped concave portions 71, 72 are formed on one side, and both concave portions 71, 72. The fixed contact pieces 73 and 74 are respectively disposed and connected to the positive and negative terminals of the battery 2.
[0006]
On the other hand, FIG. 15 shows the moving-side contact portion 8, which is fixed to a surface of the rectangular parallelepiped moving-side main body 80 attached to the lower end of the lift bracket 4 and the fixed-side contact portion 7 of the moving-side main body 80. When the lift bracket 4 is moved down, the two moving-side contact pieces 81 and 82 of the moving-side contact part 8 become the two fixed-side contact pieces 73 of the fixed-side contact part 7. , 74 in sliding contact with each other, and the switch 9 becomes conductive, and when the lift bracket 4 moves upward, the switch 9 becomes non-conductive.
[0007]
At this time, the two moving-side contact pieces 81 and 82 have a central portion curved in the direction of the fixed-side contact portion 7 and are processed into a shape having a spring property. The horizontal displacement at the time of sliding contact with both fixed side contact pieces 73 and 74 is absorbed, and a reliable contact state between both moving side contact pieces 81 and 82 and both fixed side contact pieces 73 and 74 is ensured. Have been.
[0008]
Further, the circuit configuration of the power supply device including the switch 9 is as shown in FIG. 16, and both the fixed-side conductive members 73 and 74 of the fixed-side contact portion 7 and the positive and negative terminals of the battery 2 are connected to each other. Both moving-side conductive members 81 and 82 of the moving-side contact portion 8 are connected to a device control unit 12 having a device power supply including, for example, a charger and an electric double-layer capacitor.
[0009]
Then, as described above, when the two moving-side contact pieces 81 and 82 of the moving-side contact part 8 respectively contact the two fixed-side conductive members 73 and 74 of the fixed-side contact part 7, and the switch 9 becomes conductive, The equipment power supply of the equipment control unit 12 is electrically connected to the battery 2 via the switch 9 in the conductive state, and a charging current flows from the battery 2 to the equipment power supply, thereby charging the equipment power supply.
[0010]
Therefore, in order to position the fork 5 which is in the most stable running state near the ground, both when the vehicle is unloaded and when the baggage is loaded, the lift bracket 4 is moved down, and the moving side contact portion 8 is moved in both directions. The device power supply can be charged by bringing the side conductive members 81 and 82 into sliding contact with the fixed side conductive members 73 and 74 of the fixed side contact portion 7 to bring the switch 9 into a conductive state.
[0011]
By the way, in the above configuration, in order to control on / off of the laser pointer which is an attached electric device, a switch is provided on the mast 3 by operating the switch since the mast wire is not used as described above. It is conceivable to turn on / off the laser pointer, or to provide a remote controller (hereinafter, referred to as a remote controller) using, for example, an infrared ray method, thereby turning on / off the laser pointer by remote control.
[0012]
However, in the case of the former switch, the driver must step down from the driver's seat and operate the switch, which is very complicated and burdens the driver. On the other hand, in the case of using the latter remote controller, there is a problem that the cost is high and the cost of the forklift is increased.
[0013]
Therefore, an object of the present invention is to provide a device capable of controlling on / off of an attached electric device with an inexpensive configuration.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to a battery mounted on a vehicle body of a forklift, a lift bracket guided by a mast erected on the vehicle body, and a lift bracket or a fork attached to the lift bracket. An electric device attached to the forklift, and a power supply for a rechargeable device attached to the lift bracket and connected to the auxiliary electric device for supplying power, and controlling on / off of the auxiliary electric device. In the control device for an electric device, a fixed-side main body attached to the mast, a pair of fixed-side main contact pieces attached to the fixed-side main body and connected to positive and negative terminals of the battery, attached to the fixed-side main body. With fixed auxiliary contacts Fixed contact A moving-side main body attached to the lift bracket, a pair of moving-side main contact pieces attached to the moving-side body, connected to the power supply for the device, and slidably in contact with the two fixed-side main contact pieces; A moving-side auxiliary contact piece attached at a position where the auxiliary contact piece slides. Moving contact An operation switch provided on the vehicle body side, between the fixed auxiliary contact piece and the positive terminal of the battery, for turning on / off the attached electric device, and connected to the movable auxiliary contact piece. A holding unit that holds a level of the moving-side auxiliary contact piece according to an operation state of the operation switch when the two moving-side main contact pieces contact the two fixed-side main contact pieces; A switch unit that is provided in an energizing path between the electronic device and an attached electric device and that opens and closes according to an output corresponding to the holding level from the holding unit. An on-control signal and an off-control signal are output to the control terminal of the switch unit while holding the level of the contact piece, and the switch unit is turned on by an on-control signal and an off-control signal from the holding unit, respectively. , The current path between the off to said power supply device and the accessory electrical apparatus closed and open, corresponding to the vertical position of the lift bracket The moving side main contact piece of The fixed side main contact piece And electrically connecting the device power supply to the battery by contacting with and separating from the battery.
[0015]
According to such a configuration, when the operation switch is turned on at the time of contact between the two moving-side main contact pieces and the two fixed-side main contact pieces, the moving-side auxiliary contact piece is connected to the positive terminal of the battery and becomes high. When the operation switch is turned off, the moving-side auxiliary contact piece is disconnected from the positive terminal of the battery and becomes a low level, and the high level and the low level of the moving-side auxiliary contact piece are held by the holding unit.
[0016]
When the high level is held in the holding unit, an on-control signal is output to the control terminal of the switch unit, and the switch unit is turned on by the on-control signal, and the communication between the device power supply and the attached electric device is performed. When the electrical circuit can be closed and the low level is held in the holding unit, an off control signal is output to the control terminal of the switch unit, and the switch unit is turned off by the off control signal, and the power supply for the device and the attached electric device Can be opened.
[0017]
At this time, the switch section may be configured by a switching element or a relay.
[0018]
Further, in the present invention, both the fixed-side main contact piece and the fixed-side auxiliary contact piece are disposed on the same surface of the fixed-side main body, and the two movable-side main contact pieces and the movable-side auxiliary contact piece are It is characterized in that it is arranged on the same surface of the moving side main body.
[0019]
According to such a configuration, when both the fixed-side main contact piece and the fixed-side auxiliary contact piece are arranged on the fixed-side main body, and when the moving-side main contact piece and the movable-side auxiliary contact piece are arranged on the movable-side main body. In the case of installation, there is no need to perform complicated processing on the fixed-side main body and the movable-side main body, and the work of attaching each contact piece can be easily performed.
[0020]
Further, in the present invention, both the fixed-side main contact piece and the fixed-side auxiliary contact piece are respectively disposed on different side surfaces of the fixed-side main body, and the two moving-side main contact pieces and the movable-side auxiliary contact piece are It is characterized in that they are respectively arranged on different side surfaces of the moving side main body.
[0021]
According to such a configuration, both fixed-side main contact pieces and fixed-side auxiliary contact pieces are respectively disposed on different side surfaces of the fixed-side main body, and both movable-side main contact pieces and movable-side auxiliary contact pieces are respectively provided. Since it is arranged on the different side of the moving side main body, foreign matter hardly comes into contact especially with both fixed side main contact pieces connected to the battery, and it is possible to prevent short circuit accidents and human body contact accidents from occurring. Can be.
[0022]
Further, in the present invention, the fixed-side auxiliary contact piece and the both fixed-side main contact pieces are vertically long, and the upper and lower ends of the fixed-side auxiliary contact piece are more than the two fixed-side main contact pieces. It is characterized by a long extension.
[0023]
According to such a configuration, since the fixed-side auxiliary contact piece is longer than both fixed-side main contact pieces, when the lift bracket is moved up and down, both moving-side main contact pieces come into contact with both fixed-side main contact pieces. Since the moving side auxiliary contact piece has already contacted the fixed side auxiliary contact piece and the level of the moving side auxiliary contact piece according to the state of the operation switch has been determined, the holding section has The level can be held, and a malfunction due to holding the level of the moving-side auxiliary contact piece that is not determined can be prevented.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment in which the present invention is applied to a reach type forklift will be described with reference to FIGS. 1 is an external perspective view of a forklift, FIG. 2 is a perspective view for explaining a part of a mounted state, FIGS. 3 and 4 are partial plan and front views of FIG. 2, and FIG. 6 is a perspective view of a part of FIG. 5, FIGS. 7 and 8 are plan and front views of a part of FIG. 6, and FIGS. FIG. 10 is a connection diagram.
[0025]
The reach type forklift according to the present embodiment is configured as shown in FIG. That is, a battery (not shown) that is a driving motor and other power sources is accommodated in a housing portion 23 provided next to the driver's seat 22 provided in the vehicle body 21, and a mast 24 is provided upright at a front portion of the vehicle body 21. A lift bracket 25 is provided on the mast 24 so as to be able to move up and down, and a pair of left and right L-shaped forks 26 is attached to the lift bracket 25. At this time, a hydraulic motor built in the vehicle body 21 is driven by a driver's operation, a lift cylinder (not shown) expands and contracts, and the lift bracket 25 moves up and down along the mast 24 together with the fork 26. In FIG. 1, reference numeral 27 denotes a handle provided on the driver's seat 22, and reference numeral 28 denotes various operation levers provided on the driver's seat 22.
[0026]
Further, in this type of forklift, for example, the lower end position of the lift bracket 25 is provided as an attached electric device so that the insertion position of the fork 26 can be confirmed and the loading operation at the high elevation position can be easily performed. A laser pointer ("47" in FIG. 10), which will be described later, made of a semiconductor laser is attached. The driver visually observes a laser beam emitted from the laser pointer near the pallet insertion port in front of the fork 26, and the driver visually checks the laser beam. You can check the insertion position. The control device for supplying power to the laser pointer and controlling the laser pointer to be turned on and off is configured as described below.
[0027]
FIGS. 2 to 4 show the fixed-side contact portion 30. The fixed-side main body 30A made of an insulating resin and attached to the bracket 31 fixed to the lower left end portion of the mast 24 by the bolt 32, and the fixed body 30A. Upside-down groove-shaped recesses 30B, 30C, 30D formed on the left and right side surfaces adjacent to the later-described moving side contact portion 35 of the side main body 30A, and the both side recesses 30C, 30D. Plate-shaped fixed-side main contact pieces 30E and 30F disposed at respective bottoms and connected to the positive and negative terminals of the battery, respectively, and a plate-shaped fixed-side auxiliary disposed at the bottom of the central recess 30B. And a contact piece 30G.
[0028]
Here, the fixed-side main contact pieces 30E, 30F and the fixed-side auxiliary contact piece 30G are fixed to the bottoms of the respective recesses 30C, 30D, and 30B by a fixing tool such as a screw or an adhesive. In addition, as shown in FIG. 4, the fixed auxiliary contact piece 30G is formed such that its upper and lower ends extend longer than both the fixed main contact pieces 30E and 30F.
[0029]
5 to 8 show a movable contact portion 35, which has a U-shape in plan view made of an insulating resin or the like, which is attached to the lower end of the lift bracket 25 by a bolt 36 on the surface facing the fixed contact portion 30. A moving-side main body 35A, moving-side main contact pieces 35D and 35E attached to the left and right inner surfaces of the moving-side main body 35A through interposed members 35B and 35C made of an insulating material, respectively; The moving-side auxiliary contact piece 35G is attached to the center of 35A via an interposed member 35F made of an insulating material.
[0030]
As shown in FIG. 9, a switch 38 is configured by the fixed side contact portion 30 and the movable side contact portion 35. For example, when the lift bracket 25 is moved down to a predetermined position, the movable side contact portion 35 The side main contact pieces 35D and 35E and the moving side auxiliary contact piece 35G enter the recesses 30C, 30D and 30B of the fixed side contact portion 30, and both the fixed side main contact pieces 30E and 30F and the fixed side auxiliary contact piece 30G. When the lift bracket 25 moves upward from this conductive state, the movable main contact pieces 35D and 35E and the movable auxiliary contact piece 35G are brought into contact with each other. The switch 38 becomes non-conductive when separated from the pieces 30E and 30F and the fixed-side auxiliary contact piece 30G.
[0031]
The circuit configuration of the control device including the switch 38 is as shown in FIG. That is, an operation switch 40 for on / off operation of the laser pointer 47 is disposed on the driver's seat 22 of the vehicle body 21, and both ends of the operation switch 40 are fixed to the fixed-side auxiliary contact piece 30 </ b> G of the fixed-side contact portion 30 and the vehicle body 21. Is connected to the positive terminal of the battery B mounted on the battery. Further, one fixed-side main contact piece 30E of the fixed-side contact portion 30 is connected to the positive terminal of the battery B, and the other fixed-side main contact piece 30F is connected to the negative terminal of the battery B.
[0032]
Further, as shown in FIG. 10, both moving-side main contact pieces 35D and 35E of the moving-side contact portion 35 are connected to both inputs of a charger 41 composed of a DC-DC converter or the like that reduces the output voltage of the battery B to a predetermined value. The positive / negative output terminal of the charger 41 is connected to the positive and negative terminals of the power supply 42 for the device, which is an electric double layer capacitor, and holds the level of the movable auxiliary contact piece 35G. Of the latch circuit 43 as a power supply terminal and a ground terminal.
[0033]
As shown in FIG. 10, the moving-side main contact piece 35D is connected to the enable terminal E of the latch circuit 43, and the moving-side auxiliary contact piece 35G is connected to the data terminal D of the latch circuit 43. A positive terminal 42 is connected to a collector of an NPN transistor 45 serving as a switch unit. An output terminal of a latch circuit 43 is connected to a base of the transistor 45, and a laser pointer as an attached electric device attached to the fork 26. Both ends of 47 are connected to the emitter of the transistor 45 and the negative terminal of the device power supply 42. At this time, a high-level ON control signal and a low-level OFF control signal are output from the output terminal of the latch circuit 43 according to the high level and the low level of the data terminal D.
[0034]
Then, in both the empty state and the loaded state, the lift bracket 25 is moved downward so that the fork 26 is positioned near the ground in order to obtain the most stable running state. The two moving-side main contact pieces 35D, 35E contact the fixed-side main contact pieces 30E, 30F of the fixed-side contact portion 42, respectively.
[0035]
At this time, as described above, since the upper and lower ends of the fixed-side auxiliary contact piece 30G extend longer than the fixed-side main contact pieces 30E and 30F, the two movable-side main contact pieces 35D and 35E are both Immediately before contacting the fixed-side main contact pieces 30E and 30F, the moving-side auxiliary contact piece 35G has already contacted the fixed-side auxiliary contact piece 30G.
[0036]
Then, the switch 40 is brought into a conductive state by the two moving-side main contact pieces 35D and 35E coming into contact with the two fixed-side main contact pieces 30E and 30F, respectively. If the operation switch 40 is on at that time, The fixed auxiliary contact piece 30G is connected to the battery B, the movable auxiliary contact piece 35G already in contact with the fixed auxiliary contact piece 30G is at a high level, and the data terminal D of the latch circuit 43 is also high. Level.
[0037]
Further, the enable terminal E of the latch circuit 43 goes high through the switch 38 in the conductive state, whereby the high level of the data terminal D is held by the latch circuit 43 and the output terminal of the latch circuit 43 goes high. As a result, the transistor 45 is turned on, the current path between the laser pointer 47 and the device power supply 42 is closed, power is supplied to the laser pointer 47, and the laser pointer 47 is turned on.
[0038]
At this time, the power supply for equipment 42 is electrically connected to the battery B via the switch 38 in the conductive state and the charger 41, and a charging current flows from the battery B to the power supply for equipment 42 to charge the power supply for equipment 42. Is performed.
[0039]
On the other hand, to turn off the laser pointer 47, the operation switch 40 is turned off while the switch 38 is in a conductive state, whereby the fixed auxiliary contact piece 30G is disconnected from the battery B, and the fixed auxiliary contact piece 30G is already in contact with the fixed auxiliary contact piece 30G. The moving-side auxiliary contact piece 35G that has been driven becomes low level, and the data terminal D of the latch circuit 43 also becomes low level.
[0040]
Then, the enable terminal E of the latch circuit 43 goes high through the switch 38 in the conductive state, whereby the low level of the data terminal D is held by the latch circuit 43 and the output terminal of the latch circuit 43 goes low. As a result, the transistor 45 is turned off, an energizing path between the laser pointer 47 and the device power supply 42 is opened, power supply to the laser pointer 47 is cut off, and the laser pointer 47 is turned off.
[0041]
Therefore, according to each of the above-described embodiments, when the latch circuit 43 holds the high level of the data terminal D by turning on the operation switch 40 and outputs a high-level ON control signal to the base of the transistor 45, the transistor 45 Is turned on to close the current path between the device power supply 42 and the laser pointer 47, while the latch circuit 43 holds the low level of the data terminal D due to the operation switch 40 being turned off, and the low level is applied to the base of the transistor 45. When the off control signal is output, the transistor 45 is turned off, and an energizing path between the device power supply 42 and the laser pointer 47 is opened.
[0042]
Therefore, the driver can turn on / off the laser pointer 47 only by operating the operation switch 40 provided in the driver's seat 22 without having to get off the fixed seat 22. The on / off control of the laser pointer 47 can be performed with an inexpensive configuration without becoming expensive.
[0043]
As another embodiment of the present invention, the fixed contact portion 300 and the movable contact portion 350 may be configured as shown in FIGS. 11 and 12, respectively.
[0044]
That is, the fixed-side contact portion 300 is configured as shown in FIG. 11, and the upper and lower ends of the rectangular parallelepiped fixed-side main body 30 </ b> H made of insulating resin attached to the mast 24 are opposed to the moving-side contact portion 35. Groove-shaped recesses 30I, 30J are formed, and another vertical groove-shaped recess 30K is formed in the center of both recesses 30I, 30J in parallel with each other. , 30K, fixed-side main contact pieces 30L, 30M and fixed-side auxiliary contact piece 30N are arranged and fixed with screws, adhesive, or the like. At this time, the upper and lower ends of the fixed-side auxiliary contact piece 30N are formed to extend longer than the fixed-side main contact pieces 30L and 30M.
[0045]
Further, the moving-side contact portion 350 is configured as shown in FIG. 12, and contacts the fixed-side contact portion 300 in the rectangular parallelepiped moving-side main body 35 </ b> H made of an insulating resin attached to the surface of the lift bracket 25 facing the mast 24. Up and down moving side main contact pieces 35I and 35J are attached to both ends of the facing surface, and a moving side auxiliary contact piece 35K is attached to the center of both moving side main contact pieces 35I and 35J. Here, both the moving-side main contact pieces 35I and 35J and the moving-side auxiliary contact piece 35K are processed into a shape having a spring property by bending the central portion in the direction of the fixed-side contact portion 300. The horizontal displacement at the time of sliding contact between the two moving-side main contact pieces 35I and 35J and the moving-side auxiliary contact piece 35K and the two fixed-side main contact pieces 30L and 30M and the fixed-side auxiliary contact piece 30N is absorbed. A reliable contact state between the two moving-side main contact pieces 35I, 35J and the moving-side auxiliary contact piece 35K, and the two fixed-side main contact pieces 30L, 30M and the fixed-side auxiliary contact piece 30N is ensured.
[0046]
By doing so, both the fixed-side main contact pieces 30L and 30M and the fixed-side auxiliary contact piece 30N are disposed on the fixed-side main body 30H, and both the movable-side main contact pieces 35I and 35J and the movable-side auxiliary contact piece 35K. When the contact pieces 30L and 30M are disposed on the movable body 35H, there is no need to perform complicated processing on the fixed body 30H and the movable body 35H, as compared with the embodiment shown in FIG. , 30N and 35I, 35J, 35K can be easily attached.
[0047]
Further, in each of the embodiments described above, the case where the switch unit is configured by the NPN transistor 45 as the switching element has been described. However, it is needless to say that the switch unit may be configured by a switching element or a relay other than the transistor. .
[0048]
Further, in each of the embodiments described above, the case where the attached electric device is the laser pointer 47 has been described. However, the attached electric device is not limited to the laser pointer, but may be any other light source or an imaging device such as a CCD camera. It does not matter.
[0049]
In addition, a secondary battery such as a Ni-Cd storage battery may be used as the device power supply 42 in addition to the electric double layer capacitor described above.
[0050]
Further, in each of the embodiments described above, the case where the present invention is applied to the reach type forklift is described. However, the present invention can also be applied to a counterbalance type forklift. An equivalent effect can be obtained.
[0051]
The present invention is not limited to the above embodiments, and various changes other than those described above can be made without departing from the gist of the present invention.
[0052]
【The invention's effect】
As described above, according to the first aspect of the present invention, when a high level is held in the holding unit and an on control signal is output to the control terminal of the switch unit, the switch unit is turned on and the power supply for the device is connected. When the low level is held in the holding unit and the off control signal is output to the control terminal of the switch unit while the current path between the attached electric device is closed and the switch unit is turned off, the power supply for the device and the attached electric device are turned off. Since the energizing path between the switch and the fixed side and the moving side contact part that constitutes the switch are only provided with the fixed side and moving side auxiliary contact pieces, respectively, the driver does not need to get off the fixed seat, It is possible to turn on / off the attached electric device by operating the operation switch provided in the device, and it does not become expensive as in the case of providing a remote control or the like.・ Off control Rukoto becomes possible.
[0053]
According to the second aspect of the present invention, when both the fixed-side main contact piece and the fixed-side auxiliary contact piece are disposed on the fixed-side main body, and when the moving-side main contact piece and the movable-side auxiliary contact piece are provided. In the case of disposing it on the moving side main body, it is not necessary to perform complicated processing on the fixed side main body and the moving side main body, and the work of attaching each contact piece can be easily performed.
[0054]
According to the third aspect of the present invention, both the fixed-side main contact piece and the fixed-side auxiliary contact piece are respectively disposed on different side surfaces of the fixed-side main body, and the two movable-side main contact pieces and the movable-side auxiliary piece are provided. Since the contact pieces are arranged on different side surfaces of the moving side main body, foreign matters are less likely to come into contact with both fixed side main contact pieces connected to the battery in particular, and short circuit accidents and human body contact accidents occur. It becomes possible to prevent it before it happens.
[0055]
According to the fourth aspect of the present invention, since the fixed-side auxiliary contact piece is longer than both fixed-side main contact pieces, both moving-side main contact pieces become both fixed-side main contact pieces by elevating the lift bracket. At the time of contact, the moving side auxiliary contact piece has already contacted the fixed side auxiliary contact piece, and the level of the moving side auxiliary contact piece according to the state of the operation switch has been determined. The level of the side auxiliary contact piece can be maintained, and it is possible to prevent a malfunction caused by maintaining the level of the moving auxiliary contact piece that is not determined.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a forklift according to an embodiment of the present invention.
FIG. 2 is a perspective view for explaining a part of a mounted state according to the embodiment of the present invention.
FIG. 3 is a plan view of a part of FIG. 2;
FIG. 4 is a front view of a part of FIG. 2;
FIG. 5 is a perspective view for explaining another partially attached state in the embodiment of the present invention.
FIG. 6 is a perspective view of a part of FIG. 5;
FIG. 7 is a plan view of a part of FIG. 6;
FIG. 8 is a front view of a part of FIG. 6;
FIG. 9 is a partial plan view in a use state of the embodiment of the present invention.
FIG. 10 is a circuit connection diagram of one embodiment of the present invention.
FIG. 11 is a partial perspective view of another embodiment of the present invention.
FIG. 12 is a perspective view of another part of another embodiment of the present invention.
FIG. 13 is an explanatory diagram of a schematic configuration of a reach-type forklift serving as a background of the present invention.
FIG. 14 is a partial perspective view of a conventional example.
FIG. 15 is a perspective view of another part of the conventional example.
FIG. 16 is a circuit connection diagram of a conventional example.
[Explanation of symbols]
21 Body
24 mast
25 Lift bracket
26 fork
30, 300 Fixed side contact part
30A, 30H Fixed body
30E, 30F, 30L, 30M Fixed side main contact piece
30G, 30N Fixed side auxiliary contact piece
35, 350 Moving side contact part
35A, 35H Moving body
35D, 35E, 35I, 35J Moving side conductive member
35G, 35K Moving side auxiliary contact piece
38 Switch
40 Operation switch
42 Power supply for equipment
43 Latch circuit
45 Transistor (switch part)
47 Laser Pointer (Attached Electrical Equipment)
B Battery

Claims (4)

A battery mounted on the body of the forklift, a lift bracket that is guided by a mast erected on the body and a lift bracket or an attached electric device attached to a fork attached to the lift bracket, and the lift bracket A rechargeable device power supply that is attached and connected to the attached electric device and supplies power, and a control device of the attached electric device for a forklift that performs on / off control of the attached electric device,
A fixed-side main body attached to the mast, a pair of fixed-side main contact pieces attached to the fixed-side body and connected to positive and negative terminals of the battery, and a fixed-side auxiliary contact piece attached to the fixed-side body. A fixed contact portion comprising:
A movable-side main body attached to the lift bracket, a pair of movable-side main contact pieces attached to the movable-side body, connected to the power supply for the device, and slidably in contact with the fixed-side main contact pieces, the fixed-side auxiliary contact; A moving-side contact portion comprising a moving-side auxiliary contact piece attached at a position where the moving-side auxiliary contact piece is in sliding contact with the piece;
An operation switch for on / off operation of the attached electric device, which is provided on the vehicle body side and provided between the fixed auxiliary contact piece and a positive terminal of the battery;
A holding unit connected to the moving-side auxiliary contact piece and holding a level of the moving-side auxiliary contact piece according to an operation state of the operation switch when the two moving-side main contact pieces contact the two fixed-side main contact pieces. When,
A switch unit that is provided in a conduction path between the device power supply and the attached electric device and that opens and closes with an output corresponding to the holding level from the holding unit,
The holding unit, ON of the operation switch, holding the level of the moving-side auxiliary contact piece by the OFF, ON control signal, output an OFF control signal to the control terminal of the switch unit, respectively,
The switch unit is turned on and off by an ON control signal and an OFF control signal from the holding unit, respectively, to close and open the current path between the device power supply and the attached electric device,
Attached electric equipment for a forklift, wherein the power supply for the equipment is electrically connected to the battery by contacting and separating the movable main contact piece with the fixed main contact piece according to the lifting position of the lift bracket. Control device. The two fixed-side main contact pieces and the fixed-side auxiliary contact piece are disposed on the same surface of the fixed-side body, and the two movable-side main contact pieces and the movable-side auxiliary contact piece are provided on the same surface of the movable-side body. The control device for an electric device attached to a forklift according to claim 1, wherein the control device is provided in a forklift. The two fixed-side main contact pieces and the fixed-side auxiliary contact piece are respectively disposed on different side surfaces of the fixed-side main body, and the two movable-side main contact pieces and the movable-side auxiliary contact piece are respectively provided on the movable-side main body. The control device for an attached electric device for a forklift according to claim 1, wherein the control device is provided on a different side surface. The fixed-side auxiliary contact piece and the two fixed-side main contact pieces are vertically long, and the upper and lower ends of the fixed-side auxiliary contact piece extend longer than the fixed-side main contact pieces. The control device for an attached electric device for a forklift according to any one of claims 1 to 3, characterized in that:

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