JP2006199399A - Forklift device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount a lift frame to a mounting base of a tractor front part by adjusting height of a lift frame relative to the mounting base on the tractor side when mounting to the tractor. <P>SOLUTION: The forklift device has the mounting base 3 attached to a front part of the tractor 2; the lift frame 5 having a lower part pivotally supported on the mounting base 3 pivotably around a horizontal shaft 4 and detachably provided on it; a fork base 7 liftably supported on the lift frame 5 and having a fork 6; a lifting means 8 provided on the lift frame 5 and lifting the fork base 7; and a tilting means 9 provided between the lift frame 5 and the mounting base 3 and tilting the lift frame 5 around the horizontal shaft 4. The lift frame 5 can be removed from the mounting base 3 in such a state that the fork 6 is ground-contacted. A height adjustment means 10 for adjusting the vertical position of the lift frame 5 relative to the fork base 7 at removal and adjusting the height of the lift frame 5 relative to the mounting base 3 is provided between the lift frame 5 and the fork base 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a forklift device attached to a front portion of a tractor.

Conventionally, as this type of forklift device, a mounting base mounted on the front part of the tractor, a lifting frame whose lower part is pivotally supported on the mounting base so as to be swingable about the horizontal axis, and a lifting frame that is lifted and lowered by the lifting frame A fork base that is freely supported and has a fork, a lifting and lowering means that is provided on a lift frame and raises and lowers the fork base, and is provided between the lift frame and the mounting base so that the lift frame is rotated around the horizontal axis. And a tilting means for tilting, and the lift frame is removable from the mounting base with the fork grounded.
JP 2005-1799 A

For example, if there is a slight difference in height between the ground plane where the lift frame removed from the tractor is installed and the ground at the stop position of the tractor, it is necessary to adjust the height of the lift frame and attach it to the mounting base. In the conventional forklift device, the height of the lift frame cannot be adjusted.
Therefore, the present invention provides a lift frame height adjusting means between the lift frame and the fork base so that the height of the lift frame is adjusted with respect to the mounting base on the tractor when mounting on the tractor. An object of the present invention is to provide a forklift device that can be mounted on a table.

In order to solve the above problems, the present invention has taken the following technical means.
First, a mounting base 3 attached to the front portion of the tractor 2, a lift frame 5 whose lower part is pivotally supported by the mounting base 3 so as to be swingable about a horizontal axis 4, and a detachable lift frame 5. A fork base 7 having a fork 6 supported so as to be able to move up and down, an elevating means 8 provided on the lift frame 5 for raising and lowering the fork base 7, and provided between the lift frame 5 and the mounting base 3. And a tilt means 9 for tilting the lift frame 5 about the horizontal axis 4, the lift frame 5 being removable from the mounting base 3 with the fork 6 grounded, Between the lift frame 5 and the fork base 7, there is a height adjusting means 10 for adjusting the height of the lift frame 5 relative to the mounting base 3 by adjusting the vertical position of the lift frame 5 relative to the fork base 7 at the time of removal. That it is provided And butterflies.

According to this, by providing a lift frame height adjusting means between the lift frame and the fork base, the height of the lift frame is adjusted with respect to the mounting base on the tractor when mounting on the tractor. Can be mounted on a table.
Second, the lift frame 5 includes a pair of left and right vertical rails 32 and a lower connecting member 33D that connects lower portions of the vertical rails 32. The fork base 7 includes upper and lower horizontal members 39U and 39D. The height adjusting means 10 is engaged with the engaged portion 53 provided on the lower lateral member 39D by engaging the engaging body 52 provided on the lower connecting member 33D. In addition, the height of the lift frame 5 relative to the mounting base 3 can be adjusted by adjusting the vertical position of the lower connecting member 33D.

According to this, by adjusting the vertical position of the lower connecting member by engaging the engaging body with the engaged portion, the height of the lift frame can be adjusted and mounted on the mounting base.
Third, the lift means 5 and the tilt means 9 are used as hydraulic actuators, and an electric hydraulic pressure supply device 49 for supplying hydraulic pressure thereto is detachably provided on the lift frame 5.
According to this, the forklift device can be attached to a large tractor and can handle work with a large lifting load by driving the lifting means and the tilting means by the electric hydraulic pressure supply device.

  According to the present invention, when mounting on the tractor, the height of the lift frame can be adjusted with respect to the mounting table on the tractor side and mounted on the mounting table.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6, reference numeral 1 denotes a forklift device mounted on a tractor 2, which is roughly divided into a mounting table 3 mounted on the front portion of the tractor 2, a lift frame 5 pivotally supported on the mounting table 3, and a fork 6. Fork base 7, lifting / lowering means 8 for fork base 7, tilt means 9 for lift frame 5, and lift frame height adjusting means 10.
The mounting table 3 is formed by connecting a pair of left and right side-view plate-like plate members with a horizontal connecting member 12 and is attached to a front axle frame of the tractor 2 or a front part of the front axle frame. Bolts are fixed to the weight mounting base.

A horizontal shaft 4 is penetratingly attached to the lower portion of the mounting base 3, and an arcuate long groove 30 having the horizontal shaft 4 as the center of curvature is formed at the upper portion. A mounting portion 13 for attaching the tilting means 9 is provided on the front side of the horizontal connecting member 12 in the left-right direction.
The lift frame 5 is formed in a ladder shape by connecting a pair of left and right vertical rails 32 with an upper connecting member 33U, a lower connecting member 33D, a middle / lower connecting member 33M, and a middle / upper connecting member 33N, and rearward from the lower connecting member 33D. A pair of left and right lower mounting arms 34 protrudes, and a pair of left and right upper mounting arms 35 protrude rearward from the middle / lower connecting member 33M.

Each of the left and right lower mounting arms 34 is formed with a rear open recess 34a at the rear end of a plate member projecting rearward from the upper surface of the middle part of the lower connecting member 33D. It is fitted from the front to the left and right projecting ends of the mounted horizontal shaft 4 and is secured with a retaining pin 36 so that the lower part of the lift frame 5 can swing around the horizontal shaft 4 with respect to the mounting table 3. It is pivotally supported. By removing the retaining pin 36, the lower part of the lift frame 5 can be attached to and detached from the mounting base 3 in the front-rear direction.
Each of the left and right upper mounting arms 35 is formed of a substantially triangular plate material in a side view, and is fixed to the middle / lower connecting member 33M, and its rear portion is fitted to both ends of a connecting pin 37 penetrating the long groove 30. .

Each of the left and right vertical rails 32 of the lift frame 5 is a channel material having a substantially C-shaped cross section arranged so that the groove 32a faces inward in the left-right direction, and the inside of the groove 32a is a rail surface, The roller 7a of the fork base 7 is disposed so as to be able to roll.
The fork base 7 is formed in a rectangular shape in front view by connecting the left and right ends of the upper and lower horizontal members 39U and 39D with the side end members 40, and the upper and lower horizontal members on the back side of the upper and lower horizontal members 39U and 39D. A leg member 41 for connecting 39U and 39D is provided in a rearward projecting shape, and a pair of upper and lower rollers 7a are provided on the opposing outer surfaces of the left and right leg members 41.

The fork 6 includes a support member 16 mounted on the fork base 7 and a fork member 17 protruding forward from the support member 16. Each of the left and right support members 16 is disposed between a side end member 40 and a leg member 41 of the fork base 7, and the support member 16 is connected to the fork base 7 by a pair of upper and lower pins 42 penetrating these three members. is doing.
Each of the support members 16 is formed by welding a pair of left and right L-shaped members 16B to the lower part of a prismatic or square pipe-shaped main body 16A, and a mounting portion 43 of the fork member 17 is disposed below the left and right L-shaped members 16B. Is formed. The attachment portion 43 is formed by a pin hole 43a located immediately below the main body 16A and an engagement portion 43b formed by penetrating the pin at a position forward of the main body 16A.

The fork member 17 is formed of a prismatic material or a square pipe material, and the tip is formed in a tapered shape. The fork member 17 has attached portions 44 formed at the rear and middle portions in the front-rear direction, and each attached portion 44 has a pin hole 44a and an engaging recess 44b.
The fork member 17 has a rear portion inserted between the lower portions of the left and right L-shaped members 16B of the support member 16, the mounting portion 43 and the rear mounted portion 44 are opposed to each other, and a connecting pin 45 is provided in both pin holes 43a and 44a. It connects by making it penetrate and engaging the engaging recessed part 44b with the engaging part 43b. As a result, the fork member 17 is set in the fork working posture, and the fork member 17 can be raised at the front centered on the connecting pin 45 and is received downward by the engaging portion 43b.

  Further, a midway portion of the fork member 17 is inserted between the lower portions of the left and right L-shaped members 16B of the support member 16, the mounting portion 43 and the midway mounting portion 44 are opposed to each other, and the connecting pin 45 is connected to both the pin holes 43a and 44a. When the fork member 17 is connected by engaging the engaging recess 44b with the engaging portion 43b, the fork member 17 supports the lift frame 5 at substantially the center in the longitudinal direction thereof as shown by a two-dot chain line in FIG. As a result, the forklift device 1 is set in a self-supporting posture, and the forklift device 1 can be separated from the tractor 2 and placed on the ground alone. When the forklift device 1 is placed alone on the ground, the lower end of the support member 16 is grounded to prevent forward tilting, and the rear half of the fork member 17 is grounded to prevent backward tilting.

Further, when the fork 6 is raised and the connecting pin 45 is removed from the fork working posture, the fork member 17 can be rotated around the engaging portion 43b, and the fork member 17 is placed along the front surface of the fork base 7. You can
A pair of left and right forks 6 are mounted on the left and right side portions of the fork base 7 and project outward from the bonnet 18 of the tractor 2 to the left and right. If at least one of the left and right fork members 17 protrudes left and right outward from the bonnet 18, the fork 6 can be visually observed without being obstructed by the hood 18 during fork work.

The elevating means 8 includes a chain 19, a sprocket 20 that meshes with the chain 19, and a hydraulic actuator (hydraulic cylinder) 23 that elevates and lowers the sprocket 20.
One end of the chain 19 is connected to the lift frame 5 and the other end is connected to the fork base 7, and a midway portion is wound around the sprocket 20 provided on the middle and lower connecting member 33 </ b> M of the lift frame 5 and meshed. Yes.
The hydraulic cylinder 23 has a cylinder member 23a and a piston rod 23b, and is supported by the lift frame 5 along the vertical direction. The base of the cylinder member 23a is supported by the lower connecting member 33D of the lift frame 5, and the middle portion thereof is supported by the middle and upper connecting member 33N. A pair of left and right brackets 25 that support the cylinder member 23a are provided on the upper surface of the middle part of the lower connecting member 33D in the left-right direction, and the base of the cylinder member 23a is the left-right direction provided between the brackets 25 It is supported by the orientation support shaft 26.

At the tip of the piston rod 23b, the sprocket 20 is rotatably provided. By moving the sprocket 20 up and down by the hydraulic cylinder 23, the speed of the sprocket 20 is doubled by a distance twice the lifting stroke. The fork stand 7 can be raised and lowered.
A hydraulic cylinder (hydraulic actuator) 47 is used for the tilt means 9, and this hydraulic cylinder 47 has a cylinder member 47 a and a piston rod 47 b, and the base of the cylinder member 47 a is connected laterally to the mounting table 3. The piston rod 47b is pivotally supported by a midway part of the upper and lower connecting member 33N of the lift frame 5. Accordingly, as shown in FIG. 2, the hydraulic cylinder 47 is disposed between the lift frame 5 and the mounting base 3 so as to be inclined in a side view. By driving the hydraulic cylinder 47, the lift frame 5 is moved around the horizontal axis 4. Can be tilted.

The work of the forklift device 1 is as follows: the fork 6 is lowered to a grounded state, inserted into a pallet on which a load is placed, the fork 6 is lifted through the lifting means 8, the load is lifted to a required height, and the tractor 2 is moved. And transport the package to the destination.
When inserting the fork 6 into the pallet, if necessary, the tilting means 9 is driven to cause the lift frame 5 to tilt forward and tilt the fork 6 forward and downward. When it is likely to slide down, the lift frame 5 is tilted backward and the fork 6 is tilted backward and downward.

In FIG. 2, an electric hydraulic pressure supply device 49 that supplies hydraulic pressure for driving the lifting / lowering means 8 and the tilting means 9 is provided on the left and right sides of the lift frame 5. The hydraulic pressure supply device 49 includes a hydraulic pump, an electric motor that drives the hydraulic pump, a hydraulic tank, and the like. The forklift device 1 lifts a load by operating an operation switch provided in the cabin 21 of the tractor 2 to drive the electric motor and supply hydraulic pressure to the lifting and lowering means 8 and tilting means 9 via a hydraulic pump. Operates and tilts.
In this way, by adopting the hydraulic pressure supply device 49 that can drive the lifting and lowering means 8 and tilting means 9, it becomes possible to lift a heavy load, and the forklift device 1 is mounted on a larger tractor 2 for use. can do.

The hydraulic pressure supply device 49 is detachably attached to a plate-like attachment portion 50 provided on the side portion of the lift frame 5. The hydraulic pressure supply device 49 may be detachable by providing a mounting portion at the front portion of the tractor 2.
The height adjusting means 10 is provided between the lift frame 5 and the fork base 7, and when the lift frame 5 is detached from the mounting base 3 and is in a self-supporting posture, the vertical position of the lift frame 5 with respect to the fork base 7 is set. It can be adjusted.
The height adjusting means 10 includes an engaging body 52 provided on the lower connecting member 33D that connects the lower portions of the left and right vertical rails 32 of the lift frame 5, and an engaged state provided on the lower horizontal member 39D of the fork base 7. A portion 53 is provided.

The engaging body 52 has a shaft portion 55 on which a screw is formed and a boss portion 56 provided at the lower end portion of the shaft portion 55. A nut member 57 is screwed onto the shaft portion 55, and the boss portion 56 is supported by a support bracket 58 provided on the lower connecting member 33D with a cylindrical center thereof directed in the left-right direction. Yes.
The support bracket 58 is provided on the upper surface of the lower connecting member 33D in the left-right direction and is a pair of left and right. The support bracket 58 protrudes upward from the upper surface of the lower connecting member 33D between the bracket 25 that supports the base of the hydraulic cylinder 23 for the elevating means 8 and one of the left and right lower mounting arms 34. Yes. The support bracket 58 is a pair of left and right, and a pivot shaft 59 that pivotally supports the engagement body 52 is provided between the support brackets 58. The pivot shaft 59 is a boss portion of the engagement body 52. The engaging member 52 is supported by the engaging member 52 so as to be able to swing back and forth.

The engaged portion 53 has a plate shape, protrudes rearward from the upper surface of the middle portion of the lower horizontal member 39D of the fork base 7, and is a concave portion into which the shaft portion 55 of the engaging body 52 is fitted. 61 is formed.
The vertical position of the lift frame 5 is adjusted by engaging the engaging body 52 with the engaged portion 53 by fitting the shaft portion 55 of the engaging body 52 into the recessed portion 61 of the engaged portion 53. Then, the nut member 57 screwed to the shaft portion 55 is rotated.
When the shaft portion 55 is fitted into the recess 61, the shaft portion 55 of the engaging body 52 is supported by being contacted with the upper surface of the engaged portion 53 while the shaft center of the shaft portion 55 faces in the vertical direction. It becomes a state. When the nut member 57 is rotated in this state, the nut member 57 moves along the axial center direction (vertical direction) of the shaft portion 55 of the engaging body 52, and the lift frame 5 is also moved by the vertical distance that the nut member 57 has moved. Move up and down.

Accordingly, even when there is a difference in height between the concave portion 34a of the lift frame 5 and the horizontal shaft 4 of the mounting base 3 due to a difference in height of the ground or a drain of hydraulic oil in the hydraulic cylinder 23 of the lifting means 8. The height of the lift frame 5 with respect to the mounting table 3 can be adjusted and mounted.
The lower connecting member 33D of the lift frame 5 is provided with a receiving portion 63 that receives the engaging body 52 when the height adjusting means 10 is not used (for example, when the forklift device 1 is used). The receiving portion 13 is provided behind the engaging body 52 and in the middle of the lower connecting member 33D. The receiving portion 13 has a plate shape and is provided so as to protrude upward from the lower connecting member 33D, and an upper portion thereof is bent forward. A concave portion 64 that receives the shaft portion 55 of the engaging body 52 is formed at the tip of the receiving portion 13, and when the height adjusting means 10 is not used, the engaging body 52 is in a rearward tilted posture. 55 is fitted in the concave portion 64 so as not to obstruct the raising and lowering of the fork base.

In addition, this invention is not restricted to said embodiment, A various deformation | transformation is possible.
For example, the grooves 32a of the left and right vertical rails 32 may be provided outward in the facing direction (left and right direction), and the rollers 7a may be provided on the facing inner surfaces of the left and right leg members 41 so as to be fitted into the grooves 32a.
The lifting means 8 and the tilting means 9 use an electric cylinder or the like in addition to the hydraulic cylinder, and drive the electric cylinder or the like using the power supply of the tractor 2 to raise or lower the fork base 7 or tilt the lift frame 5. You may do it.

It is a front view of a forklift device concerning an embodiment of the present invention. It is a side view of the forklift device. It is an AA arrow line sectional view of FIG. It is the perspective view which looked at the engaging body from the front side. It is the perspective view which looked at the state which the engaging body and the to-be-engaged part engaged from the front side. It is a perspective view showing a tractor equipped with a forklift device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forklift device 2 Tractor 3 Mounting base 4 Horizontal shaft 5 Lift frame 6 Fork 7 Fork base 8 Lifting means 9 Tilt means 10 Height adjusting means 32 Vertical rail 33D Lower connecting member 39U Upper horizontal member 39D Lower horizontal member 49 Hydraulic supply device 52 Engagement body 53 engaged portion

Claims (3)

A mounting base (3) mounted on the front part of the tractor (2), and a lift frame (5) which is pivotally supported by the mounting base (3) so that the lower part thereof can swing around the horizontal axis (4) and which is detachable; A fork base (7) having a fork (6) supported by the lift frame (5) so as to be movable up and down, and an elevating means provided on the lift frame (5) for raising and lowering the fork base (7) ( 8) and a tilting means (9) provided between the lift frame (5) and the mounting base (3) for tilting the lift frame (5) about the horizontal axis (4), In the forklift device in which the lift frame (5) is removable from the mounting base (3) in a state where the fork (6) is grounded,
Between the lift frame (5) and the fork base (7), the vertical position of the lift frame (5) with respect to the fork base (7) at the time of removal is adjusted, and the lift frame (5) with respect to the mounting base (3). A forklift device provided with height adjusting means (10) for adjusting the height of the forklift.   The lift frame (5) has a pair of left and right vertical rails (32) and a lower connecting member (33D) for connecting lower portions of the vertical rails (32), and the fork base (7) The horizontal members (39U, 39D) are formed by connecting the side end members (40), and the height adjusting means (10) includes an engaging body (52) provided on the lower connecting member (33D). The height of the lift frame (5) relative to the mounting base (3) is adjusted by engaging the engaged portion (53) provided on the lower horizontal member (39D) to adjust the vertical position of the lower connecting member (33D). The forklift device according to claim 1, wherein the forklift device is adjustable.   An electric hydraulic pressure supply device (49) that supplies hydraulic pressure to the lifting means (8) and the tilt means (9) as hydraulic actuators is detachably provided on the lift frame (5). The forklift device according to claim 1 or 2.

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