JP6630329B2 - Battery-powered forklift - Google Patents

Description

  The present invention relates to a battery-powered forklift.

When charging a battery-powered forklift, usually, the forklift is parked and charged with a battery, and then operated. However, when there is no time to charge the battery while the battery is mounted, the operation is performed by replacing the insufficiently charged battery with a sufficiently charged battery.
As a method of pulling out a battery from a battery housing portion provided inside a vehicle body, a method of arranging a roller track outside the vehicle body is known.

For example, Patent Document 1 discloses the following method.
An opening is provided in a part of a bottom frame serving as a bottom of the battery housing, and a roller track provided with a roller on a roller support member is arranged on the ground below the opening. A plurality of openings in the bottom frame may be provided for each roller of the roller track, or one opening may be provided for all the rollers provided on the roller track. The roller track is moved up by the elevating mechanism, and each roller comes into contact with the battery housed in the battery housing. Thereafter, the battery is guided by the rollers of the roller unit, moves in the horizontal direction, and is drawn out of the battery storage chamber.

European Patent Application No. 1415874

  In the battery-powered forklift disclosed in Patent Document 1, in order to pull out the battery, the forklift is moved and parked at a position where the opening of the bottom frame coincides with the position of the roller track, and the roller track is moved into the opening of the bottom frame. Moving. Then, the roller track is moved up by the lifting mechanism, and the battery is pulled out while guiding the rollers of the roller track. For this reason, the number of work steps is large, and it takes time to replace the battery.

According to one aspect of the present invention, a battery-powered forklift is provided on a side portion of a vehicle body , and has a first frame having an opening for inserting a battery into a battery housing and removing the battery from the battery housing. A second frame provided at a bottom portion of the vehicle body, extending from a rear side of the battery housing portion toward a side portion of the vehicle body, and having a notch having an open end communicating with the opening; A roller unit having a plurality of rollers serving as a guide when inserting the battery into the battery housing and taking out from the battery housing, and a roller support member supporting the plurality of rollers, wherein the roller unit comprises: The insertion portion of the roller unit is inserted into an attachment portion provided on an upper surface of a peripheral portion of the notch of the second frame, and is installed. The pitch of the plurality of rollers, which is arranged in the direction of movement of the battery, is at least between some of the rollers on the opening side of the first frame and is smaller than the depth of the rollers of the battery storage unit. It is getting smaller.

  ADVANTAGE OF THE INVENTION According to the battery-type forklift by this invention, the exchange operation | work of a battery can be performed easily and efficiently.

FIG. 1 is a schematic side view showing a battery-powered forklift according to an embodiment of the present invention. FIG. 2 is an enlarged view of the battery-powered forklift shown in FIG. 1 with a battery cover opened. FIG. 3 is a perspective view illustrating a structure of the battery storage unit illustrated in FIG. FIG. 4 is a perspective view showing a state where the roller unit in FIG. 3 is removed. FIG. 5 is a top view of the battery housing shown in FIG. 3 as viewed from above. FIG. 6 is a right side view of the battery housing shown in FIG. FIG. 7 is a rear view of the battery housing shown in FIG. FIG. 8 is a perspective view of a roller supporting member constituting the roller unit, and shows a state before the roller is installed. FIG. 9 is an enlarged sectional view taken along line IX-IX of FIG. FIG. 10 is a right side view for explaining a method of attaching the roller unit to the bottom frame.

Hereinafter, a battery type forklift of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic side view showing a battery-powered forklift 1 according to one embodiment of the present invention.
As shown in FIG. 1, the battery-powered forklift 1 includes a vehicle body 11 having a traveling wheel 12 provided at a lower portion, and a lift device 13 held at a front portion of the vehicle body 11 to be tiltable. The lift device 13 includes a hydraulic lift cylinder 13a, and a pair of left and right masts 13b that can slide up and down and move up and down. A carriage (not shown) is supported on the mast 13b via a winding transmission mechanism composed of a sheave and a chain so as to be able to move up and down. A pair of forks 15 can be adjusted on the carriage via a backrest 14 in the width direction. Attached to.

  In the battery-powered forklift 1, an inside of a head guard 51 is an cab 52, and a battery housing portion 17 for housing a battery 16 is formed inside the vehicle body 11 below the cab 52. The battery housing 17 is covered with a battery cover 18 during operation.

FIG. 2 is an enlarged view of the battery-powered forklift 1 shown in FIG. 1 with a battery cover 18 opened.
The battery cover 18 is attached to the vehicle body 11 via a hinge mechanism 53 so as to be openable and closable. A bottom frame 31 is provided at the bottom of the vehicle body 11. The bottom frame 31 is provided with a notch 32 (see also FIG. 4). The roller unit 20 is provided on the upper surface of the bottom frame 31 so as to cover the notch 32. The battery 16 is mounted on the roller unit 20.

  A side frame 41 is provided inside the side of the vehicle body 11, and an opening 42 serving as an opening to the outside of the battery housing 17 is formed in the side frame 41. It is possible to move in the horizontal direction with respect to the bottom frame 31, that is, in the horizontal direction, and to put it in and out of the battery housing 17. A lock member 45 that prevents the battery 16 from dropping out of the right opening of the battery housing 17 when the battery 16 is housed in the right opening of the battery housing 17 (see FIGS. 3 and 4). Is provided.

FIG. 3 is a perspective view showing the structure of the battery housing portion 17 shown in FIG. 2, and FIG. 4 is a perspective view showing a state where the roller unit 20 in FIG. 3 is removed. 5 is a top view of the battery housing 17 shown in FIG. 3 as viewed from above, FIG. 6 is a right side view of the battery housing 17 shown in FIG. 3, and FIG. FIG. 7 is a rear view of the battery storage unit 17 illustrated in FIG.
As shown in FIG. 3, the vehicle main body 11 includes a bottom frame 31, a side frame 41 provided inside the side of the vehicle main body, and a partition frame for partitioning a housing room of the battery 16 inside the vehicle main body 11. 61, 62, and 63. The side frame 41 is disposed inside the right side of the vehicle body 11 shown in FIGS. 1 and 2. The partition frames 61 and 62 extend in a direction orthogonal to the side frames 41, for example, and the partition frame 63 extends in a direction orthogonal to the partition frames 61 and 62, for example, and connects the partition frames 61 and 62. I have.

The partition frames 61, 62 and 63 shown in FIG. 3 are arranged so as to surround the outer periphery of the notch 32 of the bottom frame 31, and the space formed by the partition frames 61, 62 and 63 is Is formed. Although not shown, the partition frames 61 to 63 have mounting portions for mounting electronic components such as relays, and disconnection portions through which a harness for connecting the battery 16 shown in FIGS. 1 and 2 to a power supply portion is inserted. Notches and the like are formed.
In the description relating to the drawings after FIG. 3, the x direction and the y direction are as illustrated. The x direction is the traveling direction of the battery-powered forklift 1, and the y direction is the horizontal movement direction of the battery 16 when the battery 16 is inserted into the battery housing 17 and when the battery 16 is removed from the battery housing 17.

  As shown in FIG. 4, the side frame 41 has an opening 42 for attaching and detaching the battery 16. A U-shaped notch 32 is formed in the bottom frame 31. The notch 32 of the bottom frame 31 extends from the back side of the battery housing 17 toward the side of the vehicle body 11, and has an open end communicating with the opening 42 of the side frame 41. The notch 32 has a pair of opposing side surfaces 32 a and 32 b separated in the x direction, and a rear side surface 32 c serving as a bottom of the notch 32. The side facing the back side surface 32c is an open end communicating with the opening 42. The side surfaces 32a to 32c define the outer shape of the notch 32 formed by notching the bottom frame 31.

As shown in FIG. 3, the roller unit 20 is installed on the bottom frame 31 in the battery housing 17. The roller unit 20 is installed on the upper surface of the peripheral edge of the side surfaces 32 a to 32 c of the notch 32 of the bottom frame 31 shown in FIG. 4 and covers the notch 32. Although the details will be described later, the roller unit 20 has an insertion portion that is inserted into an attachment portion provided on the bottom frame 31, and the insertion portion is inserted into the attachment portion of the bottom frame 31. Installed on top. As illustrated in FIG. 3, the roller unit 20 includes a plurality of rollers 21 and a roller support member 25 that rotatably supports the rollers 21. As described later, the roller unit 20 is mounted on the upper surface of a fork of a forklift, and is configured to be transportable in this state.
The rollers 21 are arranged in a plurality of rows in the y direction with a rotation axis parallel to the x direction, and in one or a plurality of columns (three columns in the present embodiment) in the x direction. As shown in FIG. 3, the rollers 21 arranged in three rows in the present embodiment are arranged five by five (five rows) in the columns at both ends in the x direction, and four (4) in the center in the x direction. Rows) are arranged. The four rollers 21 arranged at the center are arranged at positions between two rollers 21 adjacent in the y direction among the rollers 21 arranged at both ends in the x direction in the y direction. I have.

FIG. 8 is a perspective view of the roller supporting member 25 constituting the roller unit 20 and shows a state before the roller 21 is installed.
The roller support member 25 has a plurality of roller mounting portions 26 for rotatably holding the roller 21. Each roller attachment portion 26 has, for example, a rectangular opening 26a and a pair of openings 26b formed in a rectangular shape smaller than the opening 26a and having one end communicating with the opening 26a.
The opening 26a is formed in a rectangular shape having a pair of long sides in the x direction that is the traveling direction of the vehicle body 11, and each opening 26b is provided on each short side of the opening 26a. A center line (not shown) in the y direction between the opening 26a and the pair of openings 26b is coaxial.
The rollers 21 illustrated in FIG. 3 and the like are inserted one by one into the roller mounting portion 26 illustrated in FIG. The roller mounting portion 26 formed on the roller support member 25 has the same arrangement as the roller 21 illustrated in FIG. That is, three rows of roller mounting sections 26 are arranged in the x direction in the roller mounting section 25 of the roller supporting member 25, and 5 rows are provided in each row at both ends in the x direction in the y direction, and 4 rows in the center row. Are arranged. Each roller 21 is inserted into the roller mounting portion 26 with its central axis parallel to the x direction.

FIG. 9 is an enlarged sectional view taken along line IX-IX of FIG.
As shown in FIG. 9, the roller 21 includes a support shaft 22, bearings 23 that support both ends of the support shaft 22, and a rotating unit 24 attached to the bearing 23. The bearing 23 and the rotating part 24 rotate integrally with the support part 22.
The rotating part 24 of the roller 21 shown in FIG. 9 is fitted into the opening 26a of the roller support member 25 shown in FIG. 8, and the axial direction of the pair of support shaft parts 22 of the roller 21 shown in FIG. Are respectively inserted into the openings 26b of the roller support member 25 shown in FIG. The opening 26a of the roller support member 25 shown in FIG. 8 is formed slightly larger than the outer diameter of the rotating part 24 of the roller 21 shown in FIG. In other words, the opening 26a of the roller support member 25 is formed in such a size that a slight gap is formed between the peripheral edge of the opening 26a and each roller 21. As shown in FIG. 5, among the rollers 21 on both ends in the x direction, the roller 21 disposed on the opening 42 side of the battery housing 17 is moved from the opening 42 on the inner side of the battery housing 17 in the y direction. The rollers 21 are arranged at a smaller pitch in the y direction, which is the moving direction of the battery 16, than the rollers 21 arranged at distant positions (see FIGS. 3 and 5). As shown in FIG. 5, the pitch in the y direction of the rollers 21 arranged at both ends in the x direction is the distance between the first roller 21 and the second roller 21 from the opening 42 of the battery housing 17. The smallest pitch. That is, the pitch between the first and second rollers 21 from the opening 42 of the battery housing portion 17 is between the second and third rollers 21, between the third and fourth rollers 21, and between the fourth and fifth rollers 21. It is smaller than the pitch between 21. The pitches between the second and third rollers 21 and the third and fourth rollers 21 and between the fourth and fifth rollers 21 from the opening 42 of the battery housing 17 may be the same. Alternatively, the pitch between the second and third rollers 21, between the third and fourth rollers 21, and between the fourth and fifth rollers 21 is proportional to the distance from the opening 42 of the battery housing 17, You may make it large.

As shown in FIG. 9, a roller holding member 27 is attached to the roller support member 25 by welding or a fastening member (not shown). The roller holding portion 27 may be formed integrally with the roller support member 25 by molding. The support shaft 22 of the roller 21 is held by a roller holding unit 27. A roller holding portion 27 is provided on the roller supporting member 25, and the roller 21 is fitted into a roller mounting portion 26 shown in FIG. 8 so that the support shaft portion 22 of the roller 21 is held by the roller holding portion 27. . In this state, the bearing 23 and the rotating part 24 shown in FIG. Accordingly, when the battery 16 is placed on the roller 21 as shown in FIG. 2 and a force for pulling or pushing the battery 16 in the y direction acts, the rotating portion 24 of the roller 21 shown in FIG. 9 rotates. . Thus, the battery 16 is guided by the rollers 21 and moves in the y direction with a small force.
In the state where the roller unit 20 is installed on the upper surface of the peripheral portion of the bottom frame 31 as shown in FIG. 6, the rotating portion 24 of the roller 21 has the lower end 24a side as shown in FIG. It is arranged inside the notch 32 of the bottom frame 31 (above the lower surface 31a). That is, the lower end 24 a of the rotating portion 24 of the roller 21 opposite to the battery 16 is located closer to the notch 32 than the upper surface of the bottom frame 31. For this reason, the minimum height (minimum ground height) of the lower surface 31a of the bottom frame 31 from the ground can be made the same as when the roller unit 20 is not attached. That is, since the lower end 24a side of the roller 21 opposite to the battery 16 side is disposed in the notch 32a, the center of gravity is lower than the structure in which the roller unit 20 is mounted on the bottom frame 31 where the notch 32 is not formed. The position can be lowered. Thereby, the stability at the time of driving the forklift or the like can be improved.

FIG. 5 shows the position where the battery 16 accommodated in the battery accommodating portion 17 is placed on the roller unit 20 by a two-dot chain line. In this state, the roller 21a closest to the opening 42 of the side frame 41 of the roller unit 20 is displaced in the y direction from the position of the side surface (the side surface on the outlet side) of the battery 16 on the opening 42 side of the side frame 41. I have. That is, when the battery 16 is housed in the battery housing part 17, the battery 16 is not placed on the roller 21a. For this reason, when the battery 16 is housed in the battery housing 17, the roller 21 a may come off from the roller attachment 26.
Therefore, in the present embodiment, a retaining member 71 for retaining the roller 21a is attached to the roller unit 20.

  As illustrated in FIG. 9, the retaining member 71 is disposed on the upper surface side of the roller supporting member 25 so as to cover the axial end of the support shaft portion 22 of the roller 21a. , And pins 72. The pin 72 is inserted through a through hole provided in the roller support member 25. On the lower surface of the roller support member 25, a back spacer 73 is attached to the roller support member 25 by welding or a fastening member (not shown). The support shaft portion 22 of the roller 21 is held by a back spacer 73, and is prevented from falling off. Note that the retaining member 71 may be attached to the roller support member 25 using a fastening member such as a bolt instead of the pin 72.

  A roller support member 25 is provided with a roller mounting portion 26 for fitting the roller 21 and a roller holding portion 27 for supporting the support shaft portion 22 of the roller 21. Further, the upper portion of the support shaft portion 22 of the roller 21 a is covered by a retaining member 71, the retaining member 71 is attached by a pin 72, and a back spacer 73 is provided on the lower surface side of the roller supporting member 25. As described above, since the roller unit 20 is integrated, the roller unit 20 can be placed on a fork of a forklift and transported.

  The height of the lower surface 27a of the roller holding portion 27 and the lower surface 73a of the back spacer 73 are the same as the height of the lower surface 31a of the bottom frame 31 or are positioned higher than the lower surface 31a of the bottom frame 31. Further, the lower end 24 a of the rotating portion 24 of the roller 21 is disposed above the lower surface 27 a of the roller holding portion 27 and the lower surface 73 a of the back spacer 73. The roller unit 20 is mounted on a fork of a forklift and installed on a bottom frame 31. To install the roller unit 20 on the bottom frame 31, the lower surface 27a of the roller holding portion 27 and the lower surface 73a of the back spacer 73 are placed on the upper surface of a fork, and the roller unit 20 is lifted. At this time, since the lower surface 27a of the roller holding portion 27 and the lower surface 73a of the back spacer 73 are arranged at the same position or higher than the lower surface 31a of the bottom frame 31, it is possible to prevent the roller 21 from floating. .

  In the rollers 21 arranged in three rows as shown in FIG. 3, of the rollers 21 in each row, the battery 16 comes off the side surface (the side surface on the outlet side) of the side frame 41 on the opening 42 side. The number of rollers 21a arranged at the position is not limited to one (one row) closest to the opening 42 side of the side frame 41 as shown in FIG. In that case, it is necessary to provide the retaining members 71 on all the rollers 21a disposed at positions off the side surface (the side surface on the outlet side) of the battery 16 on the side of the opening 42 of the side frame 41.

  As shown in FIGS. 3, 5, 6, and 8, the roller support member 25 is provided with positioning portions (insertion portions) 28, which are shaft members, at both ends in the x direction. The positioning portion 28 is formed of, for example, a shaft-like member such as a shaft penetrating the roller support member 25. The bottom frame 31 has a through-hole (attachment) 33 (see FIG. 4) through which the positioning part 28 is inserted.

FIG. 10 is a right side view for explaining a method of attaching the roller unit 20 to the bottom frame 31.
In order to attach the roller unit 20 to the bottom frame 31, the lower ends of the positioning portions 28 provided on both ends in the x direction of the roller unit 20 are respectively aligned with through holes (mounting portions) 33 of the bottom frame 31. And insert it. The position of the positioning portion 28 of the roller unit 20 and the position of the through hole 33 of the bottom frame 31 are set in advance so that the roller unit 20 is disposed at a predetermined position of the battery housing 17. For this reason, by simply inserting the positioning portion 28 of the roller unit 20 into the through hole 33 of the bottom frame 31, the roller unit 20, as shown in FIGS. Is positioned at the position. No fastening member is used for attaching the roller unit 20 to the bottom frame 31 in the present embodiment. Therefore, the mounting of the roller unit 20 to the bottom frame 31 is completed only by inserting the positioning portion 28 of the roller unit 20 into the through hole 33 of the bottom frame 31 as shown in FIG. Further, in this structure, the positioning portion 28 of the roller unit 20 is merely inserted into the through hole 33 of the bottom frame 31, but since the battery 16 is placed on the roller unit 20, the roller unit 20 is , Can be prevented from coming off from the notch 32 of the bottom frame 31.

  To remove the battery 16 stored in the battery housing 17 of the battery-powered forklift 1 from the battery housing 17, open the battery cover 18 and pull the battery 16 toward the opening 42 of the side frame 41. Since the battery 16 moves while rotating the roller 21, the battery 16 can be easily moved to the outlet side of the battery housing 17 with a small force, and the battery 16 can be inserted from the opening 42 of the side frame 41. Become. When the battery 16 is locked by the lock member 45, the lock member 45 is rotated to the unlock position, and then the battery 16 is pulled out. According to the present embodiment, since the battery 16 can be moved to the opening 42 side of the side frame 41 while being guided by the rotating roller 21, the battery 16 can be easily and quickly taken out.

  To insert the replacement battery 16 into the battery housing 17, the battery 16 is placed at the entrance of the opening 42 of the side frame 41, and the battery 16 is inserted through the opening 42 inside the battery housing 17. What is necessary is just to push in toward the position distant in the y direction. Since the battery 16 is guided by the rotating roller 21 and moves to a position inside the battery accommodating portion 17 in the y-direction from the opening 42, the battery 16 can be easily and quickly accommodated. After operating the lock member 45 to lock the battery 16, the battery cover 18 may be closed.

According to the embodiment of the present invention, the following effects can be obtained.
(1) The battery type forklift 1 includes a side frame (first frame) 41 having an opening 42, a bottom frame (second frame) 31 having a notch 32 having an open end communicating with the opening 42, A roller unit 20 having a plurality of rollers 21 and a roller support member 25 for supporting the plurality of rollers 21. The roller unit 20 is provided on the upper surface of the peripheral portion of the notch 32 of the bottom frame 31. The positioning portion (insertion portion) 28 of the roller unit 20 is inserted into a through-hole (attachment portion) 33 provided in the device. In this structure, the battery 16 is installed on the roller unit 20 arranged on the bottom frame 31. For this reason, in order to pull out the battery 16, the battery-operated forklift 1 is moved, the battery 16 is aligned with the position of a battery exchange table (not shown) arranged outside, and the battery 16 is pulled, so that the roller unit 16 is pulled out. The battery 16 may be pulled out using the roller 21 as a guide. On the other hand, in a forklift in which a battery is directly mounted on the periphery of the opening of the bottom frame, as described above, the forklift is moved and parked at a position where the opening of the bottom frame matches the position of the roller track, and the roller track is moved. It moves into the opening of the bottom frame, raises the roller track by the lifting mechanism, and guides the rollers of the roller track to pull out the battery. That is, as compared with the present embodiment, a step of moving the roller track into the opening of the bottom frame and a step of raising the roller track by the lifting mechanism are additionally required.
Therefore, according to the battery-type forklift according to the present embodiment, the battery replacement operation can be performed easily and efficiently.

  In the present embodiment, the roller unit 20 is installed on the upper surface of the peripheral edge of the notch 32 of the bottom frame 31 by inserting the positioning portion 28 of the roller unit 20 into the through hole 33 provided in the bottom frame 31. I'm just there. For this reason, the roller unit 20 can be easily attached to and detached from the battery accommodating portion 17, and in a state where the roller unit 20 is removed, the fork of another forklift or the battery mounting table mounted on the fork of the forklift is used. And the battery 16 can be mounted directly on the fork or on a battery mounting base on the fork. The battery 16 can be replaced by moving the forklift away from the battery-powered forklift 1 for battery replacement. The battery 16 can be replaced using a pallet truck, which is a manual carrier, instead of another forklift. As described above, according to the battery-powered forklift 1 of the present embodiment, the roller unit 20 can be retrofitted onto the notch 32 of the bottom frame 31 in the battery housing 17 according to the user's request. It is possible to easily switch to any one of the battery replacement methods.

  Further, in the present embodiment, when the roller unit 20 is installed on the peripheral edge of the notch 32 of the bottom frame 31 in the battery housing 17, a fastening member is not used. That is, attachment of the roller unit 20 to the bottom frame 31 is completed only by inserting the positioning portion 28 of the roller unit 20 into the through hole 33 of the bottom frame 31, and there is no need to perform a fastening operation. Therefore, the operation of installing the roller unit 20 in the battery housing 17 or removing the roller unit 20 from the battery housing 17 can be performed efficiently.

(2) In a state where the roller unit 20 is installed on the upper surface of the peripheral portion of the bottom frame 31, the lower end 24 a of the roller 21 opposite to the battery 16 is in the notch 32 of the bottom frame 31. Are located in In a structure in which a roller track having rollers provided on a roller support member is disposed on the lower surface side of a bottom frame as in Patent Literature 1, the height of the bottom frame from the ground is increased. Also, if the roller is mounted on the bottom frame where the notch is not formed, a part of the roller cannot be arranged in the notch, so that the lower surface of the battery mounted on the roller is not provided. Height position becomes higher. In such a structure, the position of the center of gravity of the forklift is increased, and the stability at the time of driving or the like is deteriorated. On the other hand, in the present embodiment, since the lower end side of the roller 21 is disposed in the notch 32 of the bottom frame 31, the minimum ground clearance near the bottom frame 31 to which the roller unit 20 is attached is made smaller than the above-described structure. Can also be lower. Thereby, the position of the center of gravity of the forklift can be lowered, and the stability at the time of driving or the like can be improved.

  (3) The lower surface 27a of the roller holding unit 27 and the lower surface 73a of the back spacer 73 are arranged at the same level as the lower surface 31a of the bottom frame 31 or above the lower surface 31a of the bottom frame 31, and the lower end 24a of the rotating unit 24 of the roller 21 is arranged. Is disposed above the lower surface 27a of the roller holding portion 27. For this reason, when the roller unit 20 is placed on a fork of a forklift and transported, it is possible to prevent the roller 21 from rising, and to efficiently perform the work of installing the roller unit 20 on the bottom frame 31. Can be.

(4) At least one roller 21 of the plurality of rollers 21 on the side of the opening 42 of the side frame 41 is located at a position where the battery 16 accommodated in the battery accommodating portion 17 is displaced from the position on the roller unit 20. The roller support member 25 is provided with a retaining member for retaining at least one roller 21a located on the opening 42 side. Therefore, it is possible to prevent the roller 21a positioned near the opening 42 from coming off.

(5) The pitch at which the plurality of rollers 21 are arranged in the moving direction of the battery 16 is such that at least a part of the rollers 21 a on the side of the opening 42 of the side frame 41 is closer to the opening 42 on the inner side of the battery housing 17. It is smaller than the roller 21 at a position separated in the y direction. When the battery 16 accommodated in the battery accommodating section 17 is pulled out, the battery 21 moves toward the opening 42, so that the roller 21 disposed on the inner side of the battery accommodating section 17 causes the battery 16 to move on the roller unit 20. The number of the rollers 21 that support the weight of the battery 16 is reduced by deviating from the mounting position. For this reason, the load applied to one roller 21 increases, and damage to the roller 21 and the smoothness of movement of the battery 16 are impaired. In the present embodiment, the pitch of the rollers 21 on the side of the opening 42 of the side frame 41 is a position inside the battery accommodating section 17 distant from the opening 42 in the y direction, in other words, the inner side of the battery accommodating section 17. Is smaller than the pitch of the rollers 21, it is possible to suppress an increase in the load applied to one roller 21 or to suppress a loss of smoothness of movement of the battery 16.

(6) The roller support member 25 and the bottom frame 31 are provided with a positioning portion 28 as a shaft-like member on one of the roller support member 25 and the bottom frame 31 and a through hole 33 as an attachment portion on the other. Is inserted into the through hole 33, and the roller support member 25 is positioned at a predetermined position in the battery housing 17. Therefore, the roller unit 20 can be positioned easily and efficiently by simply inserting the shaft-shaped member into the mounting portion. Further, since the shaft-like member is inserted into the mounting portion, the roller unit 20 can be prevented from being detached from the notch 32 of the bottom frame 31.

  In the above embodiment, the pitch of the rollers 21 arranged on the outlet (opening 42) side of the battery housing 17 is exemplified as a structure smaller than the pitch of the batteries 16 arranged on the back side of the battery housing 17. . However, the present invention is not limited to this structure, and the pitches of the rollers 21 may be all the same.

  In the above embodiment, the roller 21 is fitted into the openings 26 a and 26 b provided in the roller support member 25, and the end of the support shaft 22 of the roller 21 is fixed by the roller holding portion 27 provided in the roller support member 25. The structure for holding is exemplified. However, the holding structure of the roller 21 can be variously deformed. For example, the opening 26b formed in the roller support member 25 may be replaced with a concave portion, and the axial end of the support shaft portion 22 of the roller 21 may be held by the bottom surface of the concave portion. Alternatively, only the opening 26a is provided in the roller supporting member 25, and both ends of the support shaft portion 22 of the roller 21 are fixed to the roller supporting portion 25, or projecting portions are provided at both ends of the opening 26a, and the upper portion of the projecting portion is provided. It is also possible to adopt a structure in which a concave portion for holding the support shaft portion 22 of the roller 21 is provided on the roller 21.

  In the embodiment described above, the positioning of the roller unit 20 is performed by fitting the positioning portion 28 provided on the roller unit 20 into the through hole 33 of the bottom frame 31, and the mounting is performed without detaching from the bottom frame 31. The structure has been exemplified. However, the mounting structure of the roller unit 20 is not limited to this embodiment. For example, the through hole 33 provided in the bottom frame 31 may be replaced with a notch.

  In the above embodiment, the positioning member 28 provided on the roller support member 25 is exemplified as a shaft-like member such as a shaft. However, the positioning member 28 may be formed integrally with the roller support member 25 by molding. Further, instead of the shaft-like member, the positioning member 28 may be formed in a belt-like shape, or the positioning member 28 may be formed in a protruding shape having an engagement portion.

  The present invention is not limited to the contents shown in the above embodiment and the modified examples. Other embodiments that can be considered within the scope of the technical idea of the present invention are also included in the scope of the present invention.

1 Battery type forklift 11 Vehicle body (body)
16 Battery 17 Battery Housing 18 Battery Cover 20 Roller Unit 21, 21a Roller 22 Support Shaft 23 Bearing 24 Rotating Part 25 Roller Support Member 26 Roller Attachments 26a, 26b Opening 27 Roller Holder (Holder)
28 Positioning part (insertion part)
31 bottom frame 32 notch 33 through hole (mounting part)
41 Side frame (first frame)
42 opening 71 retaining member

Claims (2)

A first frame provided on a side portion of the vehicle body and having an opening for inserting a battery into the battery housing and removing the battery from the battery housing;
A second frame provided at a bottom portion of the vehicle body, extending from a rear side of the battery housing portion toward a side portion of the vehicle body, and having a notch having an open end communicating with the opening;
A plurality of rollers serving as guides when inserting the battery into the battery storage portion and when removing the battery from the battery storage portion, and a roller unit having a roller support member that supports the plurality of rollers,
The roller unit is installed by inserting an insertion portion of the roller unit into an attachment portion provided on an upper surface of a peripheral portion of the notch of the second frame,
The pitch of the plurality of rollers, which is arranged in the moving direction of the battery, is smaller than at least a part of the rollers on the opening side of the first frame than the rollers on the back side of the battery housing portion. Have a battery-powered forklift. The battery-operated forklift according to claim 1 ,
An axial member is provided on one of the roller support member and the second frame, and an attachment portion is provided on the other,
A battery-type forklift, wherein the shaft-like member is inserted into the mounting portion, and the roller support member is positioned at a predetermined position in the battery housing portion.

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