JP6879185B2 - Battery-powered industrial vehicle - Google Patents

Description

The present invention relates to a battery-powered industrial vehicle in which a vehicle body-side plug connected to a battery controller and a battery-side plug connected to a battery are removably fitted.

In a battery-powered forklift equipped with a battery inside the vehicle body, the battery and the battery controller are electrically connected by a battery cable unit. A battery connector is provided in the middle of the battery cable unit, and the cable from the battery and the cable from the battery controller are connected by the battery connector. The battery connector consists of a battery-side plug connected to the tip of the cable from the battery and a vehicle body-side plug connected to the tip of the cable from the battery controller, and the plugs are fitted to each other so that they can be inserted and removed. ..

For example, in the industrial vehicle described in Patent Document 1, as shown in FIG. 11, the first battery plug 90, which is a vehicle body side plug, is subordinate to the plate-shaped member 92 arranged inside the exterior frame 91 of the vehicle body. It is attached via a plate 93. The first battery plug 90 and the sub-plate 93 are locked by the mounting screw 94, and the plate-shaped member 92 and the sub-plate 93 are fastened by the fastening bolt 95. Then, the second battery plug 96, which is a battery-side plug, is fitted to the first battery plug 90 fixed to the exterior frame 91 so as to be insertable and removable.

Japanese Unexamined Patent Publication No. 2009-67565

By the way, as in Patent Document 1, the fitting of the battery side plug and the vehicle body side plug is only maintained by the mutual insertion / extraction force. Therefore, there is a risk that the mating state of the battery side plug and the vehicle body side plug will be released due to vibration of the industrial vehicle or the like. Therefore, it is conceivable to increase (strengthen) the insertion / extraction force so that the mating state is not released. However, as the insertion / extraction force increases, the force required for inserting / removing the battery-side plug and the vehicle body-side plug increases, and the battery charging work It is not preferable because the workability at the time of performing the replacement work is lowered.

If the insertion / extraction force is made small (weak) in consideration of workability, the mating state is likely to be released due to the vibration of the industrial vehicle, and there is a risk that poor contact between the terminals of the battery side plug and the vehicle body side plug may occur. Not preferable.

An object of the present invention is to provide a battery-powered industrial vehicle that can be easily inserted and removed and can maintain a mated state.

A battery-powered industrial vehicle for solving the above problems is mounted on the vehicle body, a vehicle body side plug connected to the vehicle body and a battery controller mounted on the vehicle body, and fixed to a plug fixing portion in the vehicle body. A battery-powered industrial vehicle having a battery and a battery-side plug connected to the battery, and the vehicle body-side plug and the battery-side plug are removably fitted to the plug fixing portion. The retaining hole provided, the battery-side through hole provided at a position of the battery-side plug that overlaps the retaining hole in the fitted state with the vehicle body-side plug, the battery-side through hole, and the battery. A plurality of pins penetrating the retaining hole overlapping the side through hole, a retaining member including a holding portion for holding the plurality of pins in an adjacent state, and the pin from the retaining hole and the battery side through hole. The gist is to provide a regulatory means to regulate the escape of the battery.

According to this, when the pin of the retaining member is inserted into the battery-side through hole of the battery-side plug and the retaining hole of the plug fixing portion, each pin comes into contact with the plug fixing portion that partitions the retaining hole. A plurality of pins are integrally assembled to the plug fixing portion, and the battery side plug is supported by the plurality of pins. Then, the battery-side plug is supported by the pin supported by the plug fixing portion. As a result, it is possible to prevent the battery-side plug from coming off from the vehicle body-side plug. Therefore, it is not necessary to increase the insertion / extraction force so that the battery side plug does not come off from the vehicle body side plug, and it becomes easy to insert / remove the battery side plug into the vehicle body side plug when there is no retaining member. Further, since the retaining member can maintain the state in which the battery side plug is fitted to the vehicle body side plug, it is possible to avoid the occurrence of poor contact even if the vehicle body vibration or the battery vibration occurs due to traveling.

Further, in the battery-powered industrial vehicle, the vehicle body includes a storage portion for storing the battery and a side cover for opening and closing the storage portion, and connects the holding portion of the retaining member to the vehicle body. It may be provided with a wire.

According to this, when the retaining member is suspended by the wire, the retaining member overlaps the battery. For example, if the side cover is moved in the closing direction without preventing the battery-side plug from coming off by the retaining member, the retaining member is sandwiched between the battery and the side cover. Then, the operator notices that the retaining member does not prevent the battery-side plug from coming off, and can prevent the retaining member from being left in an unused state.

Further, in a battery-powered industrial vehicle, the holding portion has a flat plate shape, the regulating means is integrated with the side cover, and the storage portion is closed by the side cover and arranged to face the holding portion. It may be a contact plate.

According to this, when the accommodating portion is closed by the side cover, the abutting plate is arranged to face the holding portion. Therefore, the retaining member can be prevented from coming off by the abutting plate only by closing the storage portion with the side cover.

Also, the battery-powered industrial vehicle, the restricting means comprises a connecting member provided on the plug fixing portion is constituted by the said connection member to be coupled linkage mechanism, wherein the coupling mechanism, coupled to the connecting member In this state, the pin may be arranged to face the holding portion to prevent the pin from coming out.

According to this, by providing the connecting member in the plug fixing portion, it becomes easy to perform the connection by the connecting mechanism.

According to the present invention, the insertion / removal work can be easily performed and the fitted state can be maintained.

The side view which shows the reach type forklift of an embodiment. A partial perspective view showing the reach type forklift of the embodiment from the rear side. An exploded perspective view showing a vehicle body side plug, a battery side plug, and a retaining member. A partial perspective view showing a state in which the side cover of the reach type forklift is opened. The perspective view which shows the body side plug and the battery side plug. An exploded perspective view showing the fitted state of the vehicle body side plug and the battery side plug from the inside of the vehicle body. The perspective view which shows the battery connector. A side view showing a battery connector with the side cover closed. Front view showing the state where the side cover is closed. The perspective view which shows the battery connector of another example. The figure which shows the background technology.

Hereinafter, an embodiment in which a battery-powered industrial vehicle is embodied in a battery-powered reach-type forklift will be described with reference to FIGS. 1 to 9. In the following explanation, "front", "rear", "left", "right", "top", and "bottom" are "front" and "rear" when the driver of the reach type forklift is facing the front of the forklift. It shall indicate "left", "right", "top", and "bottom".

As shown in FIG. 1 or 2, the reach type forklift 11 includes a vehicle body 12 and a pair of left and right reach legs 13 extending forward from the vehicle body 12. The vehicle body 12 is composed of a machine base 12a and a machine base cover 15 that covers the machine base 12a. The reach type forklift 11 includes front wheels 14 provided in front of each reach leg 13. The reach type forklift 11 includes a rear wheel 16a provided behind the vehicle body 12 and a caster wheel 16b. The rear wheels 16a serve as steering wheels and drive wheels.

The reach type forklift 11 includes a traveling motor M for driving the rear wheels 16a, a battery 30 as a power source for the traveling motor M, and a battery controller 34 for controlling the battery 30. The battery controller 34 supplies the electric energy from the battery 30 to the traveling motor M.

As shown in FIG. 3, the battery 30 and the battery controller 34 are electrically connected to each other via the battery cable unit 46. The battery cable unit 46 is configured by connecting a battery-side cable 33 extending from the battery 30 and a vehicle body-side cable 55 extending from the battery controller 34 with a battery connector 60. The battery connector 60 is configured by fitting a battery-side plug 35 connected to the battery-side cable 33 and a vehicle body-side plug 54 connected to the vehicle body-side cable 55.

As shown in FIG. 1, the reach type forklift 11 includes a cargo handling device 21 installed in front of the vehicle body 12. The cargo handling device 21 includes a mast 22 that moves back and forth along each reach leg 13 by driving a reach cylinder (not shown). A pair of left and right forks 23 are provided in front of the mast 22 via a lift bracket 24. The fork 23 moves up and down along the mast 22.

The reach type forklift 11 includes a standing type driver's cab 25 at the rear of the vehicle body 12. The driver's cab 25 of the reach type forklift 11 is provided with a cargo handling operation lever 26 for cargo handling operation and an accelerator operation lever 27 for forward / backward movement operation. Further, the driver's cab 25 is provided with a steering wheel 28.

As shown in FIG. 4, the reach type forklift 11 has a storage portion 18 for storing a battery in the front portion of the vehicle body 12. The storage portion 18 is recessed from the right side surface of the machine base 12a. The storage portion 18 includes an opening 18a opened on the right side surface of the machine base 12a. The battery 30 mounted on the reach type forklift 11 is housed in the storage unit 18. The reach type forklift 11 is a battery type forklift that travels by using the electric power of the battery 30 as a power source. The battery 30 includes a large number of battery cells (not shown) and a battery case 31 for accommodating these battery cells. The battery cell is a lead storage battery and is a square battery. The battery case 31 has a rectangular parallelepiped shape as a whole. In the battery 30 stored in the storage unit 18, the front surface 31a, the rear surface 31b, the upper surface 31c, the lower surface 31d and the left surface (not shown) of the battery case 31 are covered by the inner surface of the storage unit 18, while the right surface 31e is the storage unit 18. It is exposed from the opening 18a.

The reach type forklift 11 includes a side cover 40 that can open and close the opening 18a of the storage portion 18 in order to perform maintenance work such as charging and replacement of the battery 30. The side cover 40 and the machine base cover 15 form a part of the vehicle body 12. The side cover 40 may have a closed position H1 (see FIG. 1) that closes the opening 18a of the storage portion 18 and an open position H2 that opens the opening 18a of the storage portion 18 to the outside. The side cover 40 has a flat plate shape.

The side cover 40 is the opposite side of the first edge portion 40a located on the front side at the closed position H1 and the first edge portion 40a among the pair of edge portions extending in the vertical direction, and is located on the rear side at the closed position H1. It has a second edge portion 40b and the like. Further, the side cover 40 has a third edge portion 40c that connects the upper ends of the first edge portion 40a and the second edge portion 40b, and a fourth edge portion that connects the lower ends of the first edge portion 40a and the second edge portion 40b. It has 40d and.

The side cover 40 is connected to the machine base cover 15 by a hinge 41 provided on the second edge portion 40b. The side cover 40 can rotate around the hinge 41 as a rotation center. The side cover 40 includes an outer surface 40e on a surface forming a part of the right side surface of the vehicle body 12 at the closed position H1, and an inner surface 40f facing the right surface 31e of the battery 30 at the closed position H1. The reach type forklift 11 includes a contact plate 43 as a regulating means fixed to the inner surface 40f of the side cover 40. The contact plate 43 projects upward from the third edge portion 40c of the side cover 40. The abutting plate 43 is bent so as to project toward the outer surface 40e side of the side cover 40 toward the tip in the projecting direction from the third edge portion 40c.

The reach type forklift 11 includes a vehicle body opening 17 above the storage portion 18 in the vehicle body 12. The vehicle body opening 17 is formed by cutting out a part of the machine base cover 15. The inside of the machine base 12a is exposed from the vehicle body opening 17. When the side cover 40 is in the closed position H1, the contact plate 43 is arranged in the vehicle body opening 17.

The battery 30 includes a battery-side cable 33. The battery-side cable 33 connected to the battery 30 is pulled out from the upper surface 31c of the battery case 31. A battery-side plug 35 is connected to the tip of the battery-side cable 33.

As shown in FIG. 5, the battery-side plug 35 includes a substantially rectangular parallelepiped plug main body 36a and an insertion portion 36b integrated with the plug main body 36a. The battery-side plug 35 is provided with two battery-side through holes 37 on both sides of the plug body 36a in the longitudinal direction.

As shown in FIG. 6, the reach type forklift 11 includes a bracket 50 which is an inner surface of the machine base cover 15 and is fixed above the vehicle body opening 17. The bracket 50 is a rectangular plate-shaped fixing piece 51, a rectangular plate-shaped connecting piece 52 erected from one edge extending in the vertical direction of the fixing piece 51, and a protruding end of the connecting piece 52. It has a rectangular plate-shaped plug installation piece 53 whose protrusion direction from the connecting piece 52 is opposite to that of the fixed piece 51. The fixed piece 51 is fastened to the upper side of the vehicle body opening 17 on the inner surface of the machine base cover 15. The connecting piece 52 projects from the inner surface of the machine base cover 15 toward the machine base 12a.

The vertical length of the plug installation piece 53 is longer than the vertical length of the fixed piece 51 and the connecting piece 52. The lower portion of the plug installation piece 53 projects downward from the lower end of the fixing piece 51 and the lower end of the connecting piece 52. The lower portion of the plug installation piece 53 is exposed to the outside of the vehicle body 12 from the vehicle body opening 17.

As shown in FIG. 5, the plug installation piece 53 is provided with a retaining hole 53b at the lower portion of the plug installation piece 53. Two retaining holes 53b are provided on both sides of the plug installation piece 53 in the lateral direction. The pitch of the two retaining holes 53b arranged in the lateral direction of the plug installation piece 53 is substantially the same as the pitch of the two battery-side through holes 37 arranged in the longitudinal direction of the battery-side plug 35. Further, the pitch of the two retaining holes 53b arranged in the longitudinal direction of the plug installation piece 53 is substantially the same as the pitch of the two battery-side through holes 37 arranged in the lateral direction of the battery-side plug 35. Further, of the pair of long edge portions extending in the vertical direction of the plug installation piece 53, a wire connecting portion 53a is provided on one of the long edge portions.

A vehicle body side plug 54 constituting the battery connector 60 is fixed to the upper portion of the plug installation piece 53, and the battery side plug 35 can be inserted and removed from the vehicle body side plug 54. Therefore, in the present embodiment, the plug installation piece 53 constitutes the plug fixing portion. Here, assuming that the direction in which the battery side plug 35 is inserted / removed from the vehicle body side plug 54 is the insertion / removal direction Y, the insertion / removal direction Y is the vertical direction in the present embodiment. Further, the width direction X of the vehicle body side plug 54 and the battery side plug 35 is defined as the direction along the installation surface 53d to which the vehicle body side plug 54 of the plug installation piece 53 is fixed and orthogonal to the insertion / removal direction Y.

The vehicle body side plug 54 includes a rectangular parallelepiped plug body 54a whose length extends in the width direction X, and a fitting portion 54b integrated with the plug body 54a. The insertion portion 36b of the battery side plug 35 is inserted into the inside of the fitting portion 54b, and the fitting portion 54b and the insertion portion 36b are fitted. Then, for example, a DC voltage of 48 V is output from the battery 30. Inside each of the plugs 35 and 54, metal terminals corresponding to the positive electrode and the negative electrode are arranged, and the positive electrode line and the negative electrode line of the battery side cable 33 and the vehicle body side cable 55 are connected to each metal terminal. In a state where the battery side plug 35 and the vehicle body side plug 54 are fitted, the metal terminals provided inside are engaged with each other and electrically connected.

In the battery side plug 35 and the vehicle body side plug 54, the insertion / removal force between the fitting portion 54b and the insertion portion 36b is not too large, and the force required for inserting / removing the battery side plug 35 with respect to the vehicle body side plug 54 is not too large. is there. Therefore, the battery side plug 35 can be easily inserted and removed from the vehicle body side plug 54.

The vehicle body side plug 54 is provided with two vehicle body side through holes 56 on both sides of the plug body 54a in the width direction X in the longitudinal direction. The vehicle body side plug 54 is fixed to the plug installation piece 53 of the bracket 50 by screwing a fixing bolt 57 penetrating the vehicle body side through hole 56 into a female screw hole (not shown) of the plug installation piece 53. The vehicle body side plug 54 is fixed to the upper part of the plug installation piece 53 and faces the inner surface of the machine base cover 15. Therefore, the vehicle body side plug 54 is not exposed to the outside of the vehicle body 12 from the vehicle body opening 17.

Next, the structure for preventing the battery-side plug 35 in the battery connector 60 from coming off will be described.
As shown in FIG. 3, when the insertion portion 36b of the battery side plug 35 is fitted to the fitting portion 54b of the vehicle body side plug 54 fixed to the plug installation piece 53, the plug installation piece 53 and the battery The case where the side plug 35 overlaps and the battery side plug 35 and the plug installation piece 53 are viewed in the overlapping direction is taken as a front view. In front view, the battery-side through hole 37 of the battery-side plug 35 and the retaining hole 53b of the plug installation piece 53 overlap. Since the battery-side through hole 37 and the retaining hole 53b are provided at four locations, there are four locations where the battery-side through hole 37 and the retaining hole 53b overlap.

The battery connector 60 includes a retaining member 61 that prevents the battery-side plug 35 from coming off from the vehicle body-side plug 54. The retaining member 61 has four pins 62 and a holding portion 63 for holding the four pins 62 in a parallel arrangement state. The holding portion 63 has a rectangular flat plate shape, and is erected from the pins 62 from the four corners of the holding portion 63. The holding portion 63 holds the pitches of the two pins 62 arranged in the longitudinal direction of the holding portion 63 and the pitches of the two pins 62 arranged in the lateral direction of the holding portion 63 so as to be as follows.

The pitch of the two pins 62 arranged in the longitudinal direction of the holding portion 63 is the pitch of the two battery-side through holes 37 arranged in the width direction X (see FIG. 5) of the battery-side plug 35, and the short side of the plug installation piece 53. It is substantially the same as the pitch of the two retaining holes 53b arranged in the direction. The pitches of the two pins 62 arranged in the lateral direction of the holding portion 63 are the pitches of the two battery-side through holes 37 arranged in the insertion / removal direction Y (see FIG. 5) of the battery-side plug 35, and the length of the plug installation piece 53. It is substantially the same as the pitch of the two retaining holes 53b arranged in the direction.

The pin 62 of the retaining member 61 is inserted into the battery-side through hole 37 and the retaining hole 53b that overlap each other in front view. In the pin 62, the side of the holding portion 63 is the base end side, and the side away from the holding portion 63 is the tip end side.

As shown in FIG. 6 or 8, each of the four pins 62 penetrates the battery-side through hole 37 and the retaining hole 53b that overlap each other in the front view, and protrudes from the plug installation piece 53. Each pin 62 abuts on the plug installation piece 53 that partitions each retaining hole 53b, and a plurality of pins 62 are integrally assembled to the plug installation piece 53, and the battery-side plug 35 is supported by the plurality of pins 62. .. As a result, the retaining member 61 prevents the battery-side plug 35 from coming off from the vehicle body-side plug 54.

The retaining member 61 is connected to the wire connecting portion 53a of the plug installation piece 53 by the wire 64. The length of the wire 64 is such that when the retaining member 61 is suspended from the plug installation piece 53 by the wire 64, the retaining member 61 is suspended below the vehicle body opening 17 and on the right side 31e of the battery 30. It is set to.

As shown in FIG. 8 or 9, when the battery side plug 35 and the vehicle body side plug 54 are in the fitted state and the side cover 40 is in the closed position H1, the contact plate 43 integrated with the side cover 40 comes off. It is arranged outside the holding portion 63 of the stopping member 61. The contact plate 43 approaches the holding portion 63 when the side cover 40 is closed. Therefore, the contact plate 43 is in contact with or slightly separated from the holding portion 63 from the direction in which the side cover 40 is closed. By arranging the abutting plate 43 facing the holding portion 63, the pin 62 is prevented from coming off from the battery-side through hole 37 and the retaining hole 53b that overlap each other in the front view, and the retaining member 61 is prevented from coming off. There is. Therefore, the contact plate 43 constitutes a regulating means for restricting the removal of the pin 62 from the retaining hole 53b and the battery-side through hole 37.

Next, the operation of the reach type forklift 11 will be described.
When charging the battery 30 or replacing the battery 30, the side cover 40 is first positioned at the open position H2 as shown in FIG. Then, the contact plate 43 separates from the retaining member 61. Then, the retaining member 61 is grasped by hand and moved in a direction away from the battery-side plug 35, and the four pins 62 are extracted from the battery-side through hole 37 and the retaining hole 53b, respectively. Then, the battery-side plug 35 is no longer supported by the pin 62, and the battery-side plug 35 can be pulled out from the vehicle body-side plug 54. After that, the battery side plug 35 is pulled out from the vehicle body side plug 54.

The retaining member 61 from which the four pins 62 are extracted from the battery-side through hole 37 and the retaining hole 53b is suspended from the plug installation piece 53 by the wire 64, and is suspended so as to overlap the right side of the battery case 31 in the battery 30. It will be in the lowered state.

After the charging work of the battery 30 and the replacement work of the battery 30 are completed, the battery side plug 35 is fitted to the vehicle body side plug 54 to form the battery connector 60 as shown in FIG. 7.

After that, the side cover 40 is moved from the closed position H1 to the open position H2. Here, when the side cover 40 is in the open position H2, as shown in FIG. 4, the retaining member 61 is suspended so as to overlap the right side of the battery case 31 in the battery 30. Therefore, when the side cover 40 is moved to the closed position H1 without being prevented by the retaining member 61, the retaining member 61 is sandwiched between the right surface 31e of the battery 30 and the inner surface 40f of the side cover 40. You will notice that you have forgotten to use the retaining member 61.

Then, the pin 62 is inserted into the battery-side through hole 37 and the retaining hole 53b that overlap each other in the front view, and the tip end side of each pin 62 is projected from the plug installation piece 53. Then, the retaining member 61 prevents the battery-side plug 35 from coming off from the vehicle body-side plug 54.

Next, the side cover 40 is closed and positioned at the closed position H1. Then, as shown in FIG. 8 or 9, the contact plate 43 is arranged to face the outside of the holding portion 63 of the retaining member 61, and the retaining member 61 is prevented from coming off by the contact plate 43.

According to the above embodiment, the following effects can be obtained.
(1) By passing the pin 62 through the battery-side through hole 37 of the battery-side plug 35 through the retaining hole 53b of the plug installation piece 53, the battery-side plug 35 is prevented from coming off from the vehicle body-side plug 54. it can. As a result, it is not necessary to increase (strongly) the insertion / removal force so that the battery side plug 35 does not come off from the vehicle body side plug 54, and the battery side plug 35 can be easily inserted / removed from the vehicle body side plug 54 to charge the battery 30. Workability of work and replacement work is improved. Further, since the state in which the battery side plug 35 is fitted to the vehicle body side plug 54 can be maintained, it is possible to avoid the occurrence of poor contact between the metal terminals even if the vehicle body 12 vibrates or the battery 30 vibrates due to traveling. ..

(2) The battery-side plug 35 can be pulled out from the vehicle body-side plug 54 simply by inserting the pin 62 of the retaining member 61 into the battery-side through hole 37 of the battery-side plug 35 and the retaining hole 53b of the plug installation piece 53. Can be deterred. Therefore, in order to prevent the battery-side plug 35 from coming off, for example, it is not necessary to screw the bolt penetrating the battery-side plug 35 into the plug installation piece 53, and no tool for screwing the bolt is required. Therefore, the battery-side plug 35 can be manually inserted and removed from the vehicle body-side plug 54.

(3) The retaining member 61 was connected to the plug installation piece 53 by a wire 64. Then, when the retaining member 61 was suspended by the wire 64, the length of the wire 64 was set so that the retaining member 61 overlaps the right surface 31e of the battery 30. Therefore, if the side cover 40 is moved to the closed position H1 without preventing the battery side plug 35 from coming off by the retaining member 61, the retaining member 61 is sandwiched between the battery 30 and the side cover 40, and the side cover 40 cannot be moved to the closed position H1. As a result, it is possible to notice the unused state of the retaining member 61, and it is possible to prevent the retaining member 61 from remaining unused, that is, the battery side plug 35 and the vehicle body side plug 54 are only fitted. be able to.

(4) The retaining member 61 can be prevented from coming off by the contact plate 43 integrated with the side cover 40. The contact plate 43 is arranged to face the holding portion 63 when the side cover 40 is positioned at the closed position H1. Therefore, the retaining member 61 can be prevented from coming off by the contact plate 43 only by closing the storage portion 18 with the side cover 40.

(5) In the retaining member 61, the holding portion 63 that holds the four pins 62 has a rectangular plate shape. The contact plate 43 that prevents the retaining member 61 from coming off is also plate-shaped. Therefore, the area of contact between the holding portion 63 and the contact plate 43 is widened, and the retaining member 61 can be easily prevented from coming off.

(6) The retaining member 61 is suspended from the plug installation piece 53 by the wire 64 so as to overlap the right surface 31e of the battery 30. Further, the plug installation piece 53 from which the battery-side plug 35 is prevented from coming off is exposed to the outside of the vehicle body 12 from the vehicle body opening 17. Therefore, the work of fitting the battery-side plug 35 to the vehicle body-side plug 54 can be performed from the vehicle body opening 17, and the work of preventing the battery-side plug 35 from coming off by the retaining member 61 can also be performed from the vehicle body opening 17. it can. Therefore, the workability is improved as compared with the case where the hand is turned to the back side of the machine base cover 15 to prevent the battery side plug 35 from coming off.

(7) To prevent the battery-side plug 35 from coming off from the vehicle body-side plug 54, the pin 62 of the retaining member 61, which is separate from the battery-side plug 35, is passed through the battery-side plug 35 and the plug installation piece 53. Will be done. It is not necessary to assemble other parts to the battery side plug 35 and the vehicle body side plug 54 in order to prevent the battery side plug 35 from coming off, and it is not necessary to screw the other parts together. Therefore, the number of parts is not increased to prevent the battery-side plug 35 from coming off.

The above embodiment may be changed as follows.
○ As shown in FIG. 10, the plug installation piece 53 includes an L-shaped connecting member 58 erected from one long edge portion. The connecting member 58 includes a protruding piece 58a that is erected perpendicular to the plug installation piece 53, and a connecting plate 58b that protrudes outward from the protruding end of the protruding piece 58a. The connecting member 58 includes a female screw hole 58c in the connecting plate 58b.

The retaining member 71 holds two pins 72 and two pins 72 inserted into the two battery-side through holes 37 on one end side in the longitudinal direction (width direction X) of the battery-side plug 35 in a side-by-side state. A holding portion 73 and a knurled bolt 74 attached to the holding portion 73 are provided. Further, the retaining member 71 is connected to the connecting plate 58b by the wire 75. The knurled bolt 74 includes a disk-shaped head 74a that can be picked up by fingers to rotate the knurled bolt 74, and a male screw portion 74b that is integrated with the head 74a. The male screw portion 74b penetrates the holding portion 73 and can be screwed into the female screw hole 58c of the connecting member 58, and constitutes a connecting mechanism for connecting the retaining member 71 to the connecting member 58. Then, in this form, the connecting member 58 and the knurled bolt 74 constitute a regulating means for restricting the disconnection of the retaining member 71.

With the battery-side plug 35 fitted to the vehicle body-side plug 54, the pin 72 of the retaining member 71 is inserted into the battery-side through hole 37 and the retaining hole 53b that overlap in front view. At this time, the male screw portion 74b of the knurled bolt 74 is screwed into the female screw hole 58c of the connecting member 58. Since the head 74a of the knurled bolt 74 can be picked and turned by a finger, the work of screwing the knurled bolt 74 into the female screw hole 58c can be performed manually.

Then, when the knurled bolt 74 is screwed into the female screw hole 58c, the retaining member 71 is prevented from coming off, and the retaining member 71 can prevent the battery-side plug 35 from coming off from the vehicle body-side plug 54.

Further, a female screw hole 58c for screwing the knurled bolt 74 is provided in the plate-shaped connecting plate 58b, and the connecting plate 58b is brought closer to the outer surface of the vehicle body 12 by the protruding piece 58a. Therefore, with the knurled bolt 74 inserted into the female screw hole 58c, the head 74a can be positioned near the outer surface of the vehicle body 12, and the head 74a can be turned by the fingers of the hand.

○ The contact plate 43 for preventing the retaining member 61 from coming off may be separate from the side cover 40. For example, the abutting plate 43 may be rotatably supported on the side of the vehicle body opening 17 in the machine base cover 15, or may be rotatably supported on the right surface 31e of the battery case 31. Then, the contact plate 43 may be rotated so as to face the holding portion 63 of the retaining member 61.

○ The retaining members 61 and 71 may not be connected to the plug installation piece 53 or the connecting member 58 by the wires 64 and 75.
○ In the embodiment, the vehicle body side plug 54 is fixed to the bracket 50 fixed to the machine base cover 15, but the vehicle body side plug 54 may be directly fixed to the machine base cover 15. In this case, the machine base cover 15 serves as a plug fixing portion.

○ The fixing place of the vehicle body side plug 54 may be not the inner surface side of the machine base cover 15 but the outer surface side, and the vehicle body side plug 54 and the battery side plug 35 are fitted on the outside of the vehicle body 12 to form the battery connector 60. You may. In this case, the retaining member 71 shown in FIG. 10 is adopted, and the retaining member 71 is prevented from coming off by the knurled bolt 74.

○ In the retaining member 61 of the embodiment, the number of pins 62 may be two, one each in the longitudinal direction of the holding portion 63. In this case, the battery-side through holes 37 of the battery-side plug 35 are also one on each side, and the retaining holes 53b of the plug installation piece 53 are also one on each side. Further, the pins 62 arranged one by one on both sides of the holding portion 63 in the longitudinal direction may not face each other in the longitudinal direction and may be displaced in the lateral direction of the holding portion 63. In this case, the battery-side through hole 37 of the battery-side plug 35 is also displaced in response to the displaced pin 62.

○ The holding portion 63 of the retaining member 61 has a rectangular plate shape, but the shape may be appropriately changed as long as the four pins 62 can be integrally held and the contact plate 43 can be contacted. ..
The retaining member 61 may be a U-shaped pin that can be inserted into a pair of battery-side through holes 37 arranged in the longitudinal direction of the battery-side plug 35. In the embodiment, since the battery-side plug 35 has two battery-side through holes 37 in the longitudinal direction, the positioning member is configured to include two U-shaped pins. In this case, both ends of the U-shaped pin form a pin, and the portion connecting the pins serves as a holding portion.

○ The battery-powered industrial vehicle may be a counter-type forklift or a towing vehicle instead of the reach-type.
Next, the technical idea that can be grasped from the above embodiment and another example will be added below.

(1) A battery-powered industrial vehicle in which the connecting mechanism is a knurled bolt.

11 ... Reach-type forklift as a battery-powered industrial vehicle, 12 ... Body, 18 ... Storage, 30 ... Battery, 34 ... Battery controller, 35 ... Battery side plug, 37 ... Battery side through hole, 40 ... Side cover, 43 ... Contact plate as a regulating means, 50 ... Bracket as a plug fixing part, 53b ... Retaining hole, 54 ... Body side plug, 58 ... Connecting member, 61, 71 ... Retaining member, 62, 72 ... Pin, 63, 73 ... Holding part, 64, 75 ... Wire, 74 ... Knurled bolt as a connecting mechanism.

Claims (4)

With the car body
A vehicle body side plug connected to the battery controller mounted on the vehicle body and fixed to the plug fixing portion in the vehicle body.
The battery mounted on the vehicle body and
With the battery side plug connected to the battery,
A battery-powered industrial vehicle in which the vehicle body side plug and the battery side plug are removably fitted.
With the retaining hole provided in the plug fixing portion,
In the battery-side plug, a battery-side through hole provided at a position overlapping the retaining hole in a state of being fitted with the vehicle body-side plug,
A retaining member including a battery-side through hole, a plurality of pins penetrating the retaining hole overlapping the battery-side through hole, and a holding portion for holding the plurality of pins in an adjacent state.
A battery-powered industrial vehicle comprising: a retaining hole and a regulating means for regulating the pin from coming out of the battery-side through hole. The first aspect of the present invention, wherein the vehicle body includes a storage portion for storing the battery, a side cover for opening and closing the storage portion, and a wire for connecting the holding portion of the retaining member to the vehicle body. Battery-powered industrial vehicle. 2. The holding portion has a flat plate shape, and the regulating means is a contact plate that is integrated with the side cover and is arranged to face the holding portion with the storage portion closed by the side cover. Battery-powered industrial vehicle described in. The regulating means, the connecting member provided in the plug fixing portion is constituted by a connecting linkage mechanism relative to said coupling member, said coupling mechanism, opposed to the holding portion in a state of being connected to the connecting member The battery-powered industrial vehicle according to claim 1, which is arranged to regulate the removal of the pin.

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