JP7140004B2 - forklift - Google Patents

Description

The present invention relates to forklifts.

As shown in FIG. 9, a forklift generally comprises a lift bracket 102 on which a fork 101 is mounted. The lift bracket 102 has an upper finger bar 103 and a lower finger bar 104 that are arranged to face each other in the vertical direction and extend in the vehicle width direction of the vehicle body. The lift bracket 102 also has a pair of side bars 105 that connect both ends of the upper finger bar 103 in the extending direction and both ends of the lower finger bar 104 in the extending direction. The fork 101 is locked to the upper finger bar 103 and the lower finger bar 104 so as to be movable in the extending direction of the upper finger bar 103 and the lower finger bar 104 .

Further, as in the forklift of Patent Document 1, for example, a backrest 106 is detachably attached to the lift bracket 102 . The backrest 106 is arranged above the upper finger bars 103 with a pair of mounting bars 106 a each attached to a portion of each side bar 105 on the outer side of the vehicle body in the vehicle width direction and extending above the upper finger bars 103 . and a load support portion 106b that spans the pair of mounting bars 106a.

When the fork 101 moves toward the ends of the extending direction of the upper finger bar 103 and the lower finger bar 104 with respect to the upper finger bar 103 and the lower finger bar 104, the fork 101 moves toward the outer side of the vehicle body in the vehicle width direction. , abuts on the mounting bar 106a of the backrest 106. As shown in FIG. Therefore, the backrest 106 functions as a stopper member that prevents the upper finger bar 103 and the lower finger bar 104 from falling off from the lift bracket 102 of the fork 101 in the extending direction.

JP-A-2002-326797

By the way, the lift bracket 102 is vertically supported by a mast (not shown), and the backrest 106 moves vertically together with the lift bracket 102 . At this time, for example, if the forklift is used in a height restricted environment, the backrest 106 may exceed the height restriction when the lift bracket 102 is raised or lowered by the mast. Therefore, the backrest 106 must be removed from the lift bracket 102 if the forklift is to be used in such an environment.

However, if the backrest 106 is removed from the lift bracket 102, the fork 101 may drop off from the lift bracket 102 in the direction in which the upper finger bars 103 and the lower finger bars 104 extend. Therefore, for example, as shown in FIG. 10, it is conceivable to separately attach a stopper member 107 to each side bar 105 to which each attachment bar 106a of the backrest 106 is attached, on the outside portion of the vehicle body in the vehicle width direction. .

However, if the stopper member 107 is attached to, for example, a portion of each side bar 105 on the outer side of the vehicle body in the vehicle width direction and protrudes from the portion of each side bar 105 on the outer side of the vehicle body in the vehicle width direction, the forklift may When traveling on a narrow travel path, the stopper member 107 may come into contact with an obstacle present near the travel path. Therefore, the stopper member 107 may become an obstacle when the forklift is traveling.

In order to prevent the stopper member 107 from protruding from the outer portion of the side bar 105 in the vehicle width direction, for example, a stopper member may be attached to the lower end of each side bar 105 . However, in this case, if the outer portion of the fork 101 in the width direction of the vehicle body is configured to abut against the stopper member, the upper finger bar 103 and the lower finger bar 104 of the fork 101 extend in the direction corresponding to the stopper member. The range of movement in is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to maximize the range of movement of an upper finger bar and a lower finger bar in a fork in the direction in which the stopper is extended. To provide a forklift capable of avoiding members becoming an obstacle when the forklift is traveling.

A forklift that solves the above problems comprises an upper finger bar and a lower finger bar that are arranged opposite each other in the vertical direction and extend in the vehicle width direction of the vehicle body, both ends in the extending direction of the upper finger bar and the extension of the lower finger bar. a lift bracket having a pair of side bars connecting both ends in the installation direction, a mast supporting the lift bracket so as to be able to move up and down, and the upper finger bar and the lower finger bar. and a fork mounted on the lift bracket by being movably engaged in the extending direction of the lower finger bar, and the fork extending from the lift bracket in the extending direction of the upper finger bar and the lower finger bar. and a stopper member for preventing the fork from coming off, wherein the fork is fitted with the upper finger bar and the lower finger bar from a surface positioned on the upper finger bar and the lower finger bar side of the fork. Each of the stopper members is provided at each end in the extending direction of the lower finger bar, and at least the fork is positioned between the upper finger bar and the lower finger bar. When it moves toward the end portion in the extending direction of the finger bar, it projects toward the upper finger bar, and the projecting portion comes into contact with the stopper member.

According to this, when the fork moves toward the ends in the extension direction of the upper finger bars and the lower finger bars, the protrusions abut against the stopper members, so that the forks extend the upper finger bars and the lower finger bars. The stopper member can prevent the lift bracket from falling off in the installation direction. Here, the protruding portion protrudes between the upper finger bar and the lower finger bar from a surface of the fork located on the upper finger bar and lower finger bar sides. Therefore, for example, the movement range of the upper finger bar and the lower finger bar of the fork in the extending direction is increased compared to the case where the outer portion of the fork in the vehicle width direction contacts the stopper member. Since each stopper member is provided at both ends of the lower finger bar in the extending direction, each stopper member does not protrude from the outer portion of each side bar in the vehicle width direction of the vehicle body. To prevent a member from becoming an obstacle during travel of a forklift. As described above, the moving range of the upper finger bar and the lower finger bar of the fork in the extension direction can be maximized, and the stopper member can be prevented from interfering with the traveling of the forklift. can.

In the above-described forklift, an insertion hole formed at both ends of the lower finger bar in the extending direction and penetrating the lower finger bar in the vertical direction and into which the stopper member is inserted; and a lower end of the stopper member. a retaining portion that prevents the stopper member from coming off downward from the insertion hole in a state in which the portion protrudes downward from the insertion hole; a fork lower hook that is provided in the lower part of the lower finger bar and is engaged with the lower part of the lower finger bar; Provided at an abutting portion where the lower end portion of the stopper member protruding downward and the fork lower hook abut against each other, and is adapted to move toward the ends in the extending direction of the upper finger bar and the lower finger bar of the fork. an inclined portion that generates a biasing force for moving the stopper member in a direction in which the upper end portion of the stopper member protrudes from the insertion hole toward the upper finger bar, wherein the upper end portion of the stopper member is: A state in which the fork protrudes from the insertion hole toward the upper finger bar due to the biasing force generated by the inclined portion when the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar. and the projecting portion preferably abuts on the upper end portion of the stopper member.

According to this, in a state in which the fork has not moved toward the ends in the extending direction of the upper finger bar and the lower finger bar, and the lower end of the stopper member and the lower hook of the stopper member are not in contact with each other, the stopper member In the state where the lower end portion of the stopper member protrudes downward from the insertion hole, the retaining portion prevents the stopper member from coming off downward from the insertion hole. When the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar while the lower end of the stopper member and the fork lower hook are in contact with each other, the lower end of the stopper member and the fork lower hook are brought into contact with each other. The upper end portion of the stopper member protrudes from the insertion hole toward the upper finger bar by the biasing force generated by the inclined portion provided at the abutting portion of the stopper member. Therefore, in a state where the fork has not moved toward the ends in the extending direction of the upper finger bar and the lower finger bar and the lower end of the stopper member and the fork lower hook are not in contact with each other, the insertion hole in the stopper member blocking of the visual field of the driver driving the forklift by the portion projecting from the upper finger bar toward the upper finger bar. As a result, it is possible to prevent the stopper member from interfering with the travel of the forklift. The protrusion abuts against the upper end of the stopper member protruding from the insertion hole toward the upper finger bar, thereby preventing the fork from coming off the lift bracket in the extending direction of the upper finger bar and the lower finger bar. It can be prevented by a member.

In the forklift truck, the inclined portion is a lower end portion of the stopper member that protrudes downward from the insertion hole when the retaining portion prevents the stopper member from coming off downward from the insertion hole. and provided at a position facing the fork lower hook in the vehicle width direction, and inclined in a direction away from the fork lower hook toward the lower end of the stopper member.

According to this, when the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar, the fork lower hook comes into contact with the inclined portion of the stopper member. When the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar while the fork lower hook is in contact with the inclined portion of the stopper member, the force of the fork lower hook pushing up the stopper member is applied to the fork. It acts on the stopper member at the point of contact between the lower hook and the inclined portion. The force of the fork lower hook pushing up the stopper member is an urging force that moves the stopper member in a direction in which the upper end portion of the stopper member protrudes from the insertion hole toward the upper finger bar. In this way, when the retaining portion prevents the stopper member from coming off downward from the insertion hole, the lower end portion of the stopper member protruding downward from the insertion hole and in the vehicle width direction of the vehicle body By providing the inclined portion at the position facing the fork lower hook, the upper end portion of the stopper member can be projected from the insertion hole toward the upper finger bar.

In the above forklift, the retaining portion is a flange that is integrally formed with the upper end portion of the stopper member and abuts on the periphery of the insertion hole in the upper portion of the lower finger bar. By abutting the periphery of the insertion hole in the upper portion of the lower finger bar, it is preferable that the lower end of the stopper member is prevented from coming off downward from the insertion hole in a state of protruding downward from the insertion hole.

According to this, since the retaining portion is a flange integrally formed with the upper end portion of the stopper member, the configuration of the forklift can be simplified compared to the case where the retaining portion is a separate member from the stopper member. can.

In the above-described forklift, the retaining portion is a pin member held by the lower finger bar while passing through the insertion hole in the longitudinal direction of the vehicle body, and the stopper member has a lower end portion of the stopper member. An engaging portion that protrudes downward from the insertion hole and is engaged with an upper portion of the pin member in the insertion hole, and an upper end portion of the stopper member protrude from the insertion hole toward the upper finger bar. and a contact portion capable of contacting the lower portion of the pin member within the insertion hole when the stopper member moves in the direction of movement.

According to this, the locking portion is locked to the upper portion of the pin member in the insertion hole in a state where the lower end portion of the stopper member protrudes downward from the insertion hole. Disengagement is prevented by the pin member. Further, for example, when the stopper member vibrates and the stopper member moves toward the upper finger bar, the contact portion contacts the lower portion of the pin member in the insertion hole, thereby causing the stopper member to move toward the upper finger bar. restricted movement. Thereby, when the stopper member vibrates, it is possible to prevent the stopper member from protruding from the insertion hole toward the upper finger bar.

In the forklift described above, the projecting portion may be detachably attached to a surface of the fork located on the upper finger bar side and the lower finger bar side.

According to this, for example, after the fork is locked with respect to the upper finger bar and the lower finger bar, the projecting portion can be attached to the surface of the fork located on the upper finger bar side and the lower finger bar side. Therefore, when the fork is locked to the upper finger bar and the lower finger bar, the protrusion is removed from the surface of the fork on the side of the upper finger bar and the lower finger bar, so that the protrusion is attached to the side bar. Interference can be avoided. Therefore, the fork can be locked to the upper finger bar and the lower finger bar from the extending direction of the upper finger bar and the lower finger bar, thereby simplifying the work of attaching the fork to the upper finger bar and the lower finger bar. can be done.

According to the present invention, the moving range of the upper finger bar and the lower finger bar of the fork in the extending direction can be maximized, and the stopper member can be prevented from becoming an obstacle during travel of the forklift. can be done.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic side view which shows the forklift in embodiment. 3 is a perspective view showing a lift bracket and forks; FIG. (a) is a perspective view showing an enlarged periphery of a stopper member, and (b) is a perspective view of the stopper member. The figure which shows the state which a fork lower hook does not contact|abut against a stopper member. The figure which shows the state which the stopper member and the fork lower hook contact|abut. The figure which shows the state which the protrusion part is contact|abutted with the stopper member. (a) is an enlarged perspective view showing the periphery of a stopper member in another embodiment, and (b) is a perspective view of the stopper member. The figure which expands and shows the periphery of the stopper member in another embodiment. The perspective view which expands and shows a part of forklift in a conventional example. The perspective view which expands and shows a part of forklift in a conventional example.

An embodiment embodying a forklift will be described below with reference to FIGS. 1 to 6. FIG. In the following description, "front", "rear", "left", "right", "up", and "down" refer to states in which the driver of the forklift is facing forward (forward direction). "Front", "back", "left", "right", "upper", and "lower" when using as a reference.

As shown in FIG. 1 , the forklift 10 includes driving wheels 12 arranged at the front lower portion of the vehicle body 11 and steering wheels 13 arranged at the rear lower portion of the vehicle body 11 . The forklift 10 has a cargo handling device 14 on the front part of the vehicle body 11 . The cargo handling device 14 includes a mast 15 erected on the front portion of the vehicle body 11 , a lift bracket 16 fixed to the mast 15 , and a pair of forks 17 mounted on the lift bracket 16 . The forks 17 are loaded with a load W1.

The cargo handling device 14 includes a lift cylinder 18 that moves the lift bracket 16 up and down. By the operation of the lift cylinder 18 , the fork 17 moves up and down together with the lift bracket 16 . The mast 15 supports the lift bracket 16 so that it can be raised and lowered. The cargo handling device 14 also includes a tilt cylinder 19 that tilts the mast 15 . Driving the tilt cylinder 19 tilts the fork 17 together with the mast 15 . The lift cylinder 18 and tilt cylinder 19 are hydraulic cylinders.

A driver's cab 20 is provided in the vehicle body 11 . The driver's cab 20 is provided with a driver's seat 21 on which the driver sits. In addition, in the operator's cab 20, there are a plurality of cargo handling levers 22 for performing various operations such as lifting and tilting operations of the cargo handling device 14, a handle 23 for steering the forklift 10, and a direction of travel of the forklift 10. A direction lever 24 is provided. Further, an accelerator pedal 25 is provided on the floor of the driver's cab 20 .

The forklift 10 includes a travel motor M1 that drives the drive wheels 12, and a battery B1. Then, the forklift 10 runs at a vehicle speed corresponding to the accelerator opening of the accelerator pedal 25 by controlling the drive of the driving motor M1 according to the accelerator opening of the accelerator pedal 25 . Therefore, in the forklift 10 of the present embodiment, electric power is supplied from the battery B1 to the traveling motor M1 to drive the traveling motor M1. It is a running battery type.

As shown in FIG. 2, the lift bracket 16 has an upper finger bar 31, a lower finger bar 32, and a pair of side bars 33,34. The upper finger bar 31 and the lower finger bar 32 are in the form of elongated flat plates that are opposed to each other in the vertical direction and extend in the vehicle width direction of the vehicle body 11 . The vehicle width direction of the vehicle body 11 coincides with the left-right direction. Upper finger bar 31 and lower finger bar 32 extend parallel to each other. The length of the upper finger bar 31 in the extending direction and the length of the lower finger bar 32 in the extending direction are the same. The thickness direction of the upper finger bars 31 and the thickness direction of the lower finger bars 32 coincide with the longitudinal direction of the vehicle body 11 .

One end face 31a positioned at one end side in the extending direction of the upper finger bar 31 and one end face 32a positioned at one end side in the extending direction of the lower finger bar 32 are positioned to vertically overlap each other. Further, the other end surface 31b located on the other end side in the extending direction of the upper finger bar 31 and the other end surface 32b located on the other end side in the extending direction of the lower finger bar 32 are positioned to overlap in the vertical direction.

The upper finger bar 31 has an upper guide rail 31 f protruding from the upper end surface 31 c of the upper finger bar 31 . The upper guide rail 31f is an upper portion of the upper finger bar 31. As shown in FIG. The upper guide rail 31f extends in the direction in which the upper finger bar 31 extends. A lower end surface 31 d of the upper finger bar 31 extends parallel to the upper end surface 31 c of the upper finger bar 31 . A lower end surface 31 d of the upper finger bar 31 is a lower portion of the upper finger bar 31 .

Further, the lower finger bar 32 has a lower guide rail 32f protruding from the lower end surface 32c of the lower finger bar 32. As shown in FIG. The lower guide rail 32f is a lower portion of the lower finger bar 32. As shown in FIG. The lower guide rail 32f extends in the direction in which the lower finger bar 32 extends. The upper end surface 32d of the lower finger bar 32 extends parallel to the lower end surface 32c of the lower finger bar 32. As shown in FIG. An upper end surface 32 d of the lower finger bar 32 is the upper portion of the lower finger bar 32 .

The pair of side bars 33 and 34 have an elongated quadrangular prism shape that connects both ends of the upper finger bar 31 in the extending direction and both ends of the lower finger bar 32 in the extending direction. A pair of side bars 33 and 34 respectively extend in the vertical direction. A pair of side bars 33 and 34 extend parallel to each other. The pair of side bars 33 and 34 have the same length in the extending direction.

One end of the side bar 33 is connected to one end surface 31 a of the upper finger bar 31 , and the other end of the side bar 33 is connected to one end surface 32 a of the lower finger bar 32 . One end of the side bar 34 is connected to the other end surface 31 b of the upper finger bar 31 , and the other end of the side bar 34 is connected to the other end surface 32 b of the lower finger bar 32 . The pair of side bars 33 and 34 are joined to the upper finger bar 31 and the lower finger bar 32 by welding, for example.

One end surface 33 a located on one end side in the extending direction of the side bar 33 is located below the upper end surface 31 c of the upper finger bar 31 . Therefore, one end surface 33 a of the side bar 33 does not protrude upward beyond the upper end surface 31 c of the upper finger bar 31 . The other end surface 33 b positioned on the other end side in the extending direction of the side bar 33 is positioned above the lower end surface 32 c of the lower finger bar 32 . Therefore, the other end surface 33b of the side bar 33 does not protrude below the lower end surface 32c of the lower finger bar 32. As shown in FIG.

One end surface 34 a located on one end side in the extending direction of the side bar 34 is located below the upper end surface 31 c of the upper finger bar 31 . Therefore, one end surface 34a of the side bar 34 does not protrude upward beyond the upper end surface 31c of the upper finger bar 31. As shown in FIG. The other end surface 34b located on the other end side in the extending direction of the side bar 34 is located above the lower end surface 32c of the lower finger bar 32. As shown in FIG. Therefore, the other end surface 34b of the side bar 34 does not protrude below the lower end surface 32c of the lower finger bar 32. As shown in FIG.

Each fork 17 has an elongated L-plate shape. Each fork 17 has an elongated flat mounting portion 17a attached to the lift bracket 16, and an elongated flat mounting portion 17b extending in a direction orthogonal to the extending direction of the mounting portion 17a and on which the load W1 is placed. and , respectively. The attachment portion 17a and the placement portion 17b are continuous. The width of the attachment portion 17a and the width of the placement portion 17b are the same. The length of the mounting portion 17a in the extending direction is longer than the distance between the upper end surface 31c of the upper finger bar 31 and the lower end surface 32c of the lower finger bar 32 in the vertical direction.

The mounting portion 17a is arranged with respect to the lift bracket 16 so that one end face 171a in the thickness direction of the mounting portion 17a faces forward and the other end face 172a in the thickness direction of the mounting portion 17a faces rearward. The mounting portion 17 a is arranged forward of the lift bracket 16 . Therefore, the end surface 172a of the mounting portion 17a is a surface positioned on the upper finger bar 31 and the lower finger bar 32 side of the fork 17. As shown in FIG. The mounting portion 17a extends in the vertical direction, and the placement portion 17b extends forward from the lower edge of the end surface 171a of the mounting portion 17a.

A square block-shaped fork lower hook 35 is provided at the end of the mounting portion 17a on the mounting portion 17b side of the end surface 172a of the mounting portion 17a. The fork lower hook 35 is attached to the end face 172a of the attachment portion 17a by a bolt 36. As shown in FIG. Both end faces 35e positioned in the width direction of the fork lower hook 35 are flat surfaces extending in the extending direction of the mounting portion 17a.

A square block-shaped fork upper hook 37 is provided at an end portion of the end surface 172a of the mounting portion 17a opposite to the mounting portion 17b. The fork upper hook 37 is joined to the end surface 172a of the attachment portion 17a by, for example, welding. Both end faces 37e positioned in the width direction of the fork upper hook 37 are flat surfaces extending in the extending direction of the mounting portion 17a.

The fork lower hooks 35 are engaged with the lower guide rails 32f of the lower finger bars 32 and move relative to the lower finger bars 32 in the extending direction of the lower finger bars 32 while being engaged with the lower guide rails 32f. It is possible. The fork upper hooks 37 are engaged with the upper guide rails 31f of the upper finger bars 31, and in a state of being engaged with the upper guide rails 31f, extend in the extending direction of the upper finger bars 31 with respect to the upper finger bars 31. can be moved to Therefore, each fork 17 is attached to the lift bracket 16 by being locked to the upper finger bar 31 and the lower finger bar 32 so as to be movable in the direction in which the upper finger bar 31 and the lower finger bar 32 extend. . By moving each fork 17 with respect to the upper finger bar 31 and the lower finger bar 32 in the extending direction of the upper finger bar 31 and the lower finger bar 32, the interval between the two forks 17 can be adjusted. .

Each fork 17 is provided with a projecting portion 17f projecting between the upper finger bar 31 and the lower finger bar 32 from an end surface 172a of the mounting portion 17a. The projecting portion 17f is arranged at a position adjacent to the lower finger bar 32 between the upper finger bar 31 and the lower finger bar 32 in the vertical direction. The projecting portion 17f is in the shape of a square block. The projecting portion 17f is attached to the end surface 172a of the attaching portion 17a with a bolt 17c. Therefore, the projecting portion 17f is a separate member from the fork 17 and is detachably provided to the end surface 172a of the mounting portion 17a.

The forklift 10 includes a stopper member 40 that prevents each fork 17 from falling off from the lift bracket 16 in the extending direction of the upper finger bar 31 and the lower finger bar 32 . One stopper member 40 is provided at each end of the lower finger bar 32 in the extending direction. Insertion holes 38 are formed at both ends of the lower finger bar 32 in the extending direction. Each insertion hole 38 has a square hole shape penetrating the lower finger bar 32 in the vertical direction. A stopper member 40 is inserted into each insertion hole 38 .

3, 4, 5 and 6, the stopper member 40 provided at the end of the lower finger bar 32 on the side bar 33 side of the extending direction of the lower finger bar 32, and the configuration of the stopper member 40 will be described in detail. Note that the explanation of the stopper member 40 provided at the end on the side bar 34 side of the two ends in the extension direction of the lower finger bar 32 and the configuration of the stopper member 40 is It is the same as the stopper member 40 provided at the end on the side bar 33 side of both ends and the stopper member 40 . Therefore, a detailed description of the stopper member 40 provided at the end on the side bar 34 side of the extending direction ends of the lower finger bar 32 and the configuration of the stopper member 40 will be omitted.

As shown in FIGS. 3(a) and 3(b), the stopper member 40 has a stopper main body 41 having a substantially quadrangular prism shape. The stopper body 41 has a first outer surface 41a, a second outer surface 41b, a third outer surface 41c, and a fourth outer surface 41d. The first outer surface 41 a and the second outer surface 41 b are paired in a direction orthogonal to the axial direction of the stopper body 41 . The third outer surface 41c and the fourth outer surface 41d are paired in a direction orthogonal to the axial direction of the stopper body 41 and orthogonal to the facing direction of the first outer surface 41a and the second outer surface 41b.

A square annular flange 42 protrudes from one end of the stopper body 41 . The flange 42 is formed integrally with the stopper body 41 . Therefore, the stopper member 40 is integrally formed with a flange 42 . The flange 42 protrudes in a direction perpendicular to the axial direction of the stopper body 41 .

The first outer surface 41a has a flat surface 411a extending in the axial direction of the stopper body 41 and an inclined surface 412a continuous with the flat surface 411a. The flat surface 411 a is continuous with the flange 42 . The inclined surface 412 a continues to the edge of the flat surface 411 a opposite to the flange 42 and extends toward the tip portion of the stopper body 41 opposite to the flange 42 . The inclined surface 412a is a curved surface that curves and inclines so as to gradually approach the second outer surface 41b as it separates from the flat surface 411a. The edge of the inclined surface 412a opposite to the flat surface 411a is connected to the edge of the second outer surface 41b opposite to the flange 42. As shown in FIG. The second outer surface 41 b, the third outer surface 41 c, and the fourth outer surface 41 d are flat surfaces extending in the axial direction of the stopper body 41 . Therefore, the stopper body 41 has a tapered shape at the portion opposite to the flange 42 with respect to the flat surface 411a.

As shown in FIG. 4, the axial length of the stopper body 41 is longer than the distance between the lower end surface 32c and the upper end surface 32d of the lower finger bar 32 in the vertical direction. The stopper member 40 is inserted into the insertion hole 38 so that the first outer surface 41 a is located on the side opposite to the side bar 33 in the vehicle width direction of the vehicle body 11 . The stopper member 40 is inserted into the insertion hole 38 so that one end of the stopper main body 41 serves as the upper end of the stopper member 40 and the tip of the stopper main body 41 serves as the lower end of the stopper member 40 . .

The flange 42 contacts the periphery of the insertion hole 38 in the upper end surface 32 d of the lower finger bar 32 , so that the lower end of the stopper member 40 protrudes downward from the insertion hole 38 . Prevents downward slippage. Therefore, the flange 42 functions as a retaining portion that prevents the stopper member 40 from coming off downward from the insertion hole 38 in a state where the lower end portion of the stopper member 40 protrudes downward from the insertion hole 38 .

A portion of the inclined surface 412a is a lower end projecting downward from the insertion hole 38 of the stopper member 40 when the flange 42 prevents the stopper member 40 from coming off downward into the insertion hole 38; It is an inclined portion provided at a position facing the fork lower hook 35 in the vehicle width direction of the vehicle body 11 . A portion of the inclined surface 412a is inclined in a direction away from the fork lower hook 35 toward the lower end of the stopper member 40. As shown in FIG.

As shown in FIG. 5, a portion of the inclined surface 412a is inclined when the fork 17 moves toward the end in the extending direction of the upper finger bar 31 and the lower finger bar 32, as indicated by the arrow X1 in FIG. It is provided at a contact portion where the lower end portion of the stopper member 40 projecting downward from the insertion hole 38 and the fork lower hook 35 contact each other. A portion of the inclined surface 412a is such that the upper end of the stopper member 40 moves from the insertion hole 38 to the upper finger bar 31 as the upper finger bar 31 and the lower finger bar 32 of the fork 17 move toward the ends in the extending direction. A biasing force is generated to move the stopper member 40 in the direction of protruding toward it.

Specifically, when the fork 17 moves toward the ends of the upper finger bar 31 and the lower finger bar 32 in the extending direction, the end surface 35 e of the fork lower hook 35 abuts the inclined surface 412 a of the stopper body 41 . When the fork 17 moves toward the ends in the extension direction of the upper finger bar 31 and the lower finger bar 32 with the end surface 35e of the fork lower hook 35 in contact with the inclined surface 412a, the fork lower hook 35 is moved to the stopper. A force pushing up the member 40 acts on the stopper member 40 at the contact point between the fork lower hook 35 and the inclined surface 412a. The force of the fork lower hook 35 pushing up the stopper member 40 is an urging force that moves the stopper member 40 in a direction in which the upper end portion of the stopper member 40 protrudes from the insertion hole 38 toward the upper finger bar 31 .

As shown in FIG. 6, the upper end of the stopper member 40 is biased by an inclined surface 412a when the fork 17 moves toward the ends of the upper finger bar 31 and the lower finger bar 32 in the extending direction. , the upper finger bar 31 protrudes from the insertion hole 38. As shown in FIG. When the lower end of the stopper member 40 abuts the upper end surface of the fork lower hook 35 and the entire lower end of the stopper member 40 is inserted into the insertion hole 38, the flange 42 is positioned above the projecting portion 17f. The flat surface 411a of the stopper body 41 faces the projecting portion 17f in the vehicle width direction of the vehicle body 11 .

Then, when the fork 17 moves further toward the ends in the extending direction of the upper finger bar 31 and the lower finger bar 32 , the projecting portion 17 f comes into contact with the upper end portion of the stopper member 40 . Therefore, the stopper member 40 protrudes toward the upper finger bar 31 at least when the fork 17 moves toward the end in the extending direction of the upper finger bar 31 and the lower finger bar 32, and the protruding portion 17f. contacts the stopper member 40 . When the protruding portion 17f is in contact with the stopper member 40, the side surface 17e of the fork 17, which is the outer portion of the vehicle body 11 in the vehicle width direction, is one end surface 31a of the upper finger bar 31 and one end surface 32a of the lower finger bar 32. , and does not protrude from a side surface 33e, which is a portion of the side bar 33 on the outer side of the vehicle body 11 in the vehicle width direction.

Next, the operation of this embodiment will be described.
When the fork 17 moves toward the end of the upper finger bar 31 and the lower finger bar 32 in the extension direction, the fork lower hook 35 pushes up the stopper member 40, and the upper end of the stopper member 40 is pushed from the insertion hole 38 to the upper end. Protrude toward the finger bar 31 . Then, when the fork 17 moves further toward the ends in the extending direction of the upper finger bar 31 and the lower finger bar 32 , the protruding portion 17 f abuts the stopper member 40 . As a result, the stopper member 40 prevents the fork 17 from dropping off from the lift bracket 16 in the extending direction of the upper finger bar 31 and the lower finger bar 32 .

The following effects can be obtained in the above embodiment.
(1) The protrusion 17f protrudes from the end surface 172a of the fork 17 between the upper finger bar 31 and the lower finger bar 32. As shown in FIG. Therefore, for example, compared to the case where the side surface 17e of the fork 17, which is the outer portion of the vehicle body 11 in the vehicle width direction, abuts the stopper member 40, the upper finger bar 31 and the lower finger bar 32 of the fork 17 extend in the extending direction. movement range increases. Since the stopper members 40 are provided at both ends of the lower finger bar 32 in the extending direction, the stopper members 40 are located outside the vehicle width direction of the vehicle body 11 on the side bars 33 and 34 . Since the stopper member 40 does not protrude from the forklift 10, it is avoided that the stopper member 40 becomes an obstacle when the forklift 10 travels. As described above, the movement range of the upper finger bar 31 and the lower finger bar 32 of the fork 17 in the extending direction can be maximized, and the stopper member 40 does not become an obstacle when the forklift 10 travels. can be avoided.

(2) When the fork 17 has not moved toward the end of the upper finger bar 31 and the lower finger bar 32 in the extending direction, and the lower end of the stopper member 40 and the fork lower hook 35 are not in contact with each other. The stopper member 40 is prevented from coming off downward from the insertion hole 38 by the flange 42 in a state where the lower end projects downward from the insertion hole 38 . Then, it is assumed that the fork 17 moves toward the ends of the upper finger bar 31 and the lower finger bar 32 in the extending direction while the lower end of the stopper member 40 and the fork lower hook 35 are in contact with each other. Then, the upper end portion of the stopper member 40 protrudes from the insertion hole 38 toward the upper finger bar 31 due to the biasing force generated by the inclined surface 412a provided at the contact point between the lower end portion of the stopper member 40 and the fork lower hook 35. do. Here, the fork 17 has not moved toward the ends of the upper finger bar 31 and the lower finger bar 32 in the extending direction, and the lower end of the stopper member 40 and the fork lower hook 35 are not in contact with each other. think. In this state, the portion of the stopper member 40 protruding from the insertion hole 38 toward the upper finger bar 31 is prevented from obstructing the driver's field of view of the forklift 10 . Therefore, it is possible to prevent the stopper member 40 from becoming an obstacle when the forklift 10 travels. The protruding portion 17f abuts on the upper end portion of the stopper member 40 protruding from the insertion hole 38 toward the upper finger bar 31, whereby the fork 17 is lifted in the extending direction of the upper finger bar 31 and the lower finger bar 32. Dropping off from the bracket 16 can be prevented by the stopper member 40 .

(3) When the fork 17 moves toward the ends of the upper finger bar 31 and the lower finger bar 32 in the extending direction, the fork lower hook 35 comes into contact with the inclined surface 412 a of the stopper member 40 . When the fork 17 moves toward the ends in the extension direction of the upper finger bar 31 and the lower finger bar 32 while the fork lower hook 35 is in contact with the inclined surface 412a of the stopper member 40, the fork lower hook 35 is moved. A force pushing up the stopper member 40 acts on the stopper member 40 at the contact point between the fork lower hook 35 and the inclined surface 412a. The force of the fork lower hook 35 pushing up the stopper member 40 is an urging force that moves the stopper member 40 in a direction in which the upper end portion of the stopper member 40 protrudes from the insertion hole 38 toward the upper finger bar 31 . In this way, when the flange 42 prevents the stopper member 40 from coming off downward into the insertion hole 38 , the lower end portion of the stopper member 40 protruding downward from the insertion hole 38 and of the vehicle body 11 . An inclined surface 412a is provided at a position facing the fork lower hook 35 in the vehicle width direction. This allows the upper end portion of the stopper member 40 to protrude from the insertion hole 38 toward the upper finger bar 31 .

(4) The flange 42 integrally formed on the upper end of the stopper member 40 prevents the stopper member 40 from coming off downward from the insertion hole 38 in a state where the lower end of the stopper member 40 protrudes downward from the insertion hole 38. It was made to function as a retaining part. Therefore, the configuration of the forklift 10 can be simplified as compared with the case where the retainer is a separate member from the stopper member 40 .

(5) The protruding portion 17f is detachably attached to the end surface 172a of the fork 17. As shown in FIG. According to this, for example, after locking the fork 17 with respect to the upper finger bar 31 and the lower finger bar 32, the projecting portion 17f can be attached to the end face 172a of the fork 17. As shown in FIG. Therefore, when the fork 17 is locked to the upper finger bar 31 and the lower finger bar 32, by removing the projecting portion 17f from the end surface 172a of the fork 17, the projecting portion 17f interferes with the side bars 33 and 34. can be avoided. Therefore, the fork 17 can be locked to the upper finger bars 31 and the lower finger bars 32 from the direction in which the upper finger bars 31 and the lower finger bars 32 extend. It is possible to simplify the mounting work for.

It should be noted that the above embodiment can be implemented with the following modifications. The above embodiments and the following modifications can be combined with each other within a technically consistent range.

As shown in FIG. 7(a), the forklift 10 is provided with a pin member 50, which is held by the lower finger bar 32 while passing through the insertion hole 38 in the longitudinal direction of the vehicle body 11, as a retaining portion. good too. In this case, as shown in FIG. 7A, the flange 42 may not be provided on the stopper member 40 . The lower finger bar 32 is formed with a pin holding hole 51 communicating with the insertion hole 38 and penetrating the lower finger bar 32 in the longitudinal direction of the vehicle body 11 . The pin member 50 is a spring pin that is driven into the pin holding hole 51 and held in the pin holding hole 51 while penetrating through the insertion hole 38 in the longitudinal direction of the vehicle body 11 .

As shown in FIG. 7(b), a groove 52 is formed in the second outer surface 41b of the stopper body 41. As shown in FIG. The groove 52 has a bottom surface 52a, a first side surface 52b and a second side surface 52c. The bottom surface 52a has a flat shape extending in the axial direction of the stopper body 41 and is continuous with the third outer surface 41c and the fourth outer surface 41d. The first side surface 52 b and the second side surface 52 c face each other in the axial direction of the stopper body 41 . The first side surface 52b connects the base end edge of the stopper body 41 on the bottom surface 52a to the second outer surface 41b. The second side surface 52c connects the edge of the bottom surface 52a on the tip side of the stopper body 41 and the second outer surface 41b. The first side surface 52b and the second side surface 52c are continuous with the third outer surface 41c and the fourth outer surface 41d, respectively.

As shown in FIG. 7(a), the pin member 50 is arranged in the groove 52. As shown in FIG. The first side surface 52b of the groove 52 functions as a locking portion that is locked to the upper portion of the pin member 50 in the insertion hole 38 in a state where the lower end of the stopper member 40 protrudes downward from the insertion hole 38. . Further, the second side surface 52c of the groove 52 is positioned so that the pin member 50 is positioned within the insertion hole 38 when the stopper member 40 moves in a direction in which the upper end portion of the stopper member 40 protrudes from the insertion hole 38 toward the upper finger bar 31. It functions as a contact part that can contact the lower part of the

According to this, the first side surface 52b of the groove 52 is engaged with the upper portion of the pin member 50 in the insertion hole 38 in a state where the lower end of the stopper member 40 protrudes downward from the insertion hole 38. The pin member 50 prevents the member 40 from coming out of the insertion hole 38 downward. Further, for example, when the stopper member 40 vibrates and moves toward the upper finger bar 31, the second side surface 52c of the groove 52 contacts the lower portion of the pin member 50 in the insertion hole 38. As a result, movement of the stopper member 40 toward the upper finger bar 31 is restricted. This can prevent the stopper member 40 from protruding from the insertion hole 38 toward the upper finger bar 31 when the stopper member 40 vibrates.

○ In the embodiment shown in FIGS. 7(a) and 7(b), the groove 52 is not formed in the second outer surface 41b of the stopper body 41. A hole may be formed. In this case, the upper portion of the inner peripheral surface of the through-hole is engaged with the upper portion of the pin member 50 in the insertion hole 38 with the lower end portion of the stopper member 40 protruding downward from the insertion hole 38 . It functions as a locking part. Further, the portion of the inner peripheral surface of the through-hole located below the insertion hole 38 when the stopper member 40 moves in the direction in which the upper end portion of the stopper member 40 protrudes from the insertion hole 38 toward the upper finger bar 31 . It functions as a contact portion capable of contacting the lower portion of the pin member 50 inside.

○ As shown in FIG. 8 , the first outer surface 41 a of the stopper body 41 may not have the inclined surface 412 a and the entire first outer surface 41 a may be a flat surface extending in the axial direction of the stopper body 41 . In the fork lower hook 35, when the flange 42 prevents the stopper member 40 from coming off downward from the insertion hole 38, the portion of the fork lower hook 35 abuts against the lower end portion of the stopper member 40 protruding downward from the insertion hole 38. , an inclined surface 351e may be formed as an inclined portion. Therefore, the inclined surface 351e is formed between the lower end portion of the stopper member 40 projecting downward from the insertion hole 38 when the fork 17 moves toward the ends of the extending direction of the upper finger bar 31 and the lower finger bar 32, and the fork lower. It is provided at the abutting portion where the hook 35 abuts. The inclined surface 351e is inclined downward from the upper end surface of the fork lower hook 35 toward the end surface 35e.

The inclined surface 351e projects the upper end of the stopper member 40 from the insertion hole 38 toward the upper finger bar 31 as the upper finger bar 31 and the lower finger bar 32 of the fork 17 move toward the ends in the extending direction. A biasing force is generated to move the stopper member 40 in the direction. Specifically, when the fork 17 moves toward the ends in the extending direction of the upper finger bar 31 and the lower finger bar 32 , the inclined surface 351 e of the fork lower hook 35 contacts the stopper member 40 . Suppose that the fork 17 moves toward the ends in the extending direction of the upper finger bar 31 and the lower finger bar 32 while the inclined surface 351 e of the fork lower hook 35 is in contact with the stopper member 40 . Then, the force by which the fork lower hook 35 pushes up the stopper member 40 acts on the stopper member 40 at the contact point between the inclined surface 351e of the fork lower hook 35 and the stopper member 40 . The force of the fork lower hook 35 pushing up the stopper member 40 is an urging force that moves the stopper member 40 in a direction in which the upper end portion of the stopper member 40 protrudes from the insertion hole 38 toward the upper finger bar 31 .

(circle) in embodiment shown in FIG. 8, the 1st outer surface 41a of the stopper main body 41 may also be formed with the inclined surface 412a. In short, the inclined portion is formed by the lower end portion of the stopper member 40 projecting downward from the insertion hole 38 when the fork 17 moves toward the ends in the extending direction of the upper finger bar 31 and the lower finger bar 32, and the fork lowers. It suffices if it is provided at the abutting portion where the hook 35 abuts.

O In the embodiment, the insertion holes 38 may not be formed at both ends of the lower finger bar 32 in the extending direction. A stopper member may be attached to each portion of the upper end surface 32 d of the lower finger bar 32 that is located at each end in the extending direction of the lower finger bar 32 . Each stopper member may be attached to the upper end surface 32d of the lower finger bar 32 by, for example, bolts or may be joined by welding. In this case, each stopper member moves from the upper end surface 32d of the lower finger bar 32 toward the upper finger bar 31 regardless of the movement of the upper finger bar 31 and the lower finger bar 32 in the fork 17 toward the ends in the extending direction. always sticking out. In short, one stopper member is provided at each end of the lower finger bar 32 in the extending direction, and at least the forks 17 move toward the ends of the upper finger bar 31 and the lower finger bar 32 in the extending direction. It is sufficient that it protrudes toward the upper finger bar 31 when it is closed.

(circle) in embodiment, the inclined surface 412a may not be a curved surface, and may be a flat surface.
(circle) in embodiment, the stopper member 40 may be a triangular prism shape, for example. Then, for example, one part of the three corners extending in the axial direction of the stopper member 40 forms an inclined portion that inclines in a direction away from the fork lower hook 35 toward the lower end of the stopper member 40. may In short, the inclined portion need not be a plane.

(circle) in embodiment, the stopper member 40 may be cylindrical shape, for example, and the shape of the stopper member 40 is not specifically limited. The shape of the insertion hole 38 may be changed as appropriate according to the shape of the stopper member 40 .

O In the embodiment, the flange 42 may be annular, for example, and the shape of the flange 42 is not particularly limited.
(circle) in embodiment, the protrusion part 17f may be joined by welding with respect to the end surface 172a of the attachment part 17a.

(circle) in embodiment, the protrusion part 17f may be cylindrical shape, for example, and the shape of the protrusion part 17f is not specifically limited.
O In the embodiment, the upper finger bars 31 and the lower finger bars 32 may be cylindrical, for example, and the shapes of the upper finger bars 31 and the lower finger bars 32 are not particularly limited.

O In the embodiment, the pair of side bars 33 and 34 may be cylindrical, for example, and the shape of the pair of side bars 33 and 34 is not particularly limited.
(circle) in embodiment, the forklift 10 may be the structure provided with the one fork 17, and the number of the forks 17 is not specifically limited.

O In the embodiment, the forklift 10 is not limited to the battery type, and may be, for example, an engine type, or a hybrid type having an engine in addition to the battery B1.

DESCRIPTION OF SYMBOLS 10... Forklift, 11... Vehicle body, 15... Mast, 16... Lift bracket, 17... Fork, 17f... Projection part, 31... Upper finger bar, 32... Lower finger bar, 33, 34... Side bar, 35... Fork lower hook , 38... Insertion hole 40... Stopper member 42... Flange as retaining portion 50... Pin member as retaining portion 52b... First side surface functioning as locking portion 52c... First side surface functioning as contact portion 2 side surfaces, 351e, 412a, inclined surfaces that are inclined portions.

Claims (6)

An upper finger bar and a lower finger bar that are arranged to face each other in the vertical direction and extend in the vehicle width direction of the vehicle body, and both ends in the extending direction of the upper finger bars and both ends in the extending direction of the lower finger bars are connected to each other. a lift bracket having an interlocking pair of side bars;
a mast that movably supports the lift bracket;
a fork attached to the lift bracket by being engaged with the upper finger bar and the lower finger bar so as to be movable in the extending direction of the upper finger bar and the lower finger bar;
a stopper member that prevents the fork from falling off from the lift bracket in the extending direction of the upper finger bar and the lower finger bar,
The fork is provided with a projecting portion projecting between the upper finger bar and the lower finger bar from a surface of the fork located on the upper finger bar side and the lower finger bar side,
The stopper members are provided one at each end in the extending direction of the lower finger bar, and at least when the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar. is in a state of protruding toward the upper finger bar, the protruding portion abuts the stopper member,
insertion holes formed at both end portions of the lower finger bars in the extending direction and penetrating the lower finger bars in the vertical direction and into which the stopper members are inserted;
a retaining portion that prevents the stopper member from coming off downward from the insertion hole in a state where the lower end of the stopper member protrudes downward from the insertion hole;
a fork lower hook provided on a surface of the fork located on the side of the upper finger bar and the lower finger bar and engaged with a lower portion of the lower finger bar;
When the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar, the lower end of the stopper member protruding downward from the insertion hole abuts against the fork lower hook. The upper end portion of the stopper member is provided at the contact portion, and the upper end portion of the stopper member moves from the insertion hole toward the upper finger bar as the upper finger bar and the lower finger bar of the fork move toward the ends in the extending direction. an inclined portion that generates a biasing force that moves the stopper member in a projecting direction,
The upper end portion of the stopper member is moved from the insertion hole to the upper end portion by a biasing force generated by the inclined portion when the fork moves toward the end portion of the extending direction of the upper finger bar and the lower finger bar. A forklift , wherein the protruding portion protrudes toward the finger bar and abuts on the upper end portion of the stopper member . An upper finger bar and a lower finger bar that are arranged to face each other in the vertical direction and extend in the vehicle width direction of the vehicle body, and both ends in the extending direction of the upper finger bars and both ends in the extending direction of the lower finger bars are connected to each other. a lift bracket having an interlocking pair of side bars;
a mast that movably supports the lift bracket;
a fork attached to the lift bracket by being engaged with the upper finger bar and the lower finger bar so as to be movable in the extending direction of the upper finger bar and the lower finger bar;
a stopper member that prevents the fork from falling off from the lift bracket in the extending direction of the upper finger bar and the lower finger bar,
The fork is provided with a projecting portion projecting between the upper finger bar and the lower finger bar from a surface of the fork located on the upper finger bar side and the lower finger bar side,
The stopper members are provided one at each end in the extending direction of the lower finger bar, and at least when the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar. is in a state of protruding toward the upper finger bar, the protruding portion abuts the stopper member,
A forklift, wherein the projecting portion is detachably provided on a surface of the fork located on the upper finger bar and the lower finger bar side. insertion holes formed at both end portions of the lower finger bars in the extending direction and penetrating the lower finger bars in the vertical direction and into which the stopper members are inserted;
a retaining portion that prevents the stopper member from coming off downward from the insertion hole in a state where the lower end of the stopper member protrudes downward from the insertion hole;
a fork lower hook provided on a surface of the fork located on the side of the upper finger bar and the lower finger bar and engaged with a lower portion of the lower finger bar;
When the fork moves toward the ends in the extending direction of the upper finger bar and the lower finger bar, the lower end of the stopper member protruding downward from the insertion hole abuts against the fork lower hook. The upper end portion of the stopper member is provided at the contact portion, and the upper end portion of the stopper member moves from the insertion hole toward the upper finger bar as the upper finger bar and the lower finger bar of the fork move toward the ends in the extending direction. an inclined portion that generates a biasing force that moves the stopper member in a projecting direction,
The upper end portion of the stopper member is moved from the insertion hole to the upper end portion by a biasing force generated by the inclined portion when the fork moves toward the end portion of the extending direction of the upper finger bar and the lower finger bar. 3. The forklift truck according to claim 2 , wherein the protrusion is in a state of protruding toward the finger bar, and the protrusion abuts the upper end of the stopper member. The inclined portion is a lower end portion that projects downward from the insertion hole of the stopper member when the stopper member is prevented from being pulled out of the insertion hole downward by the retaining portion, and 2. The fork lower hook is provided at a position facing the fork lower hook in the vehicle width direction, and is inclined in a direction away from the fork lower hook toward the lower end of the stopper member. A forklift according to claim 3 . The retaining portion is a flange that is integrally formed with the upper end portion of the stopper member and abuts around the insertion hole in the upper portion of the lower finger bar,
The stopper member moves downward with respect to the insertion hole in a state in which the lower end portion of the stopper member protrudes downward from the insertion hole by abutting the flange on the periphery of the insertion hole in the upper portion of the lower finger bar. 5. The forklift truck according to claim 1, wherein the slip-out of the forklift is prevented. The retaining portion is a pin member that is held by the lower finger bar while penetrating through the insertion hole in the longitudinal direction of the vehicle body,
The stopper member is
a locking portion that is locked to an upper portion of the pin member within the insertion hole in a state where the lower end portion of the stopper member protrudes downward from the insertion hole;
a contact portion capable of contacting a lower portion of the pin member within the insertion hole when the stopper member moves in a direction in which the upper end portion of the stopper member protrudes from the insertion hole toward the upper finger bar; 5. A forklift truck according to any one of claims 1, 3 and 4, characterized in that it comprises:

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