JPH066155Y2 - Parent-child forklift - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a lifting unit of a forklift body (hereinafter referred to as a parent lift) corresponding to a parent lift, and a child lift (hereinafter referred to as a remote control pallet truck) to a lifting member. ,
The present invention relates to a parent-child forklift having a detachable detachable child lift, and more specifically, to an improvement of a detachable connecting portion of the child lift to the parent lift.

(Prior Art) The parent-child type forklift as described above is used when loading and unloading a transportation container, and as such a parent-child type forklift, some forms have been used in the past. Are known (for example, JP-A-51-85153 or JP-A-55).
No. 7181). Generally, in a parent-child type forklift, as shown in FIG. 6, a child lift 25 is detachably hooked via a hook 26 to a finger bar 24 of a lift bracket 23, which is vertically moved by a mast 22 of the parent lift 21. ing. That is, the child lift 25 hooks a pair of left and right square hooks 26 provided on the upper part of the rear surface of the main body to the upper finger bar 24 having a rectangular cross section, and contacts the lower part of the rear surface of the main body with the front surface of the lower finger bar 24. And the child lift 25 (not shown)
It has each function of traveling, steering, cargo handling (elevation),
The parent lift 21 is remotely controlled.

(Problems to be solved by the invention) By the way, in the parent-child type forklift, the child lift 2 for the floor surface of the container, for example, is used during the cargo handling work.
At the time of landing of No. 5, depending on the way of landing or the state of landing, the tip of the leg (fork) 27 may receive an upward force as shown by an arrow in the figure. However, due to the above-described conventional detachable connection structure of the parent-child type fork lith, that is, the structure in which the rectangular hook 26 is hooked on the finger bar 24 having a rectangular cross section, a large clockwise moment in the drawing acts on the hook 26. The hook 26 may be damaged.

Then, this invention makes it the objective to provide the parent-child type forklift which can eliminate the above-mentioned conventional problem.

(Means for Solving Problems) In order to solve the above problems, the present invention provides a parent-child type forklift of a type in which a child lift is detachably hooked to a finger bar of a parent lift via a hook. A round rod-shaped hooking shaft extending horizontally in the vehicle width direction is formed on the upper part of the bar, and the inner surface corners of the hook hooked on the hooking shaft are formed in a curved surface corresponding to the hooking shaft. Further, the child lift is characterized by being provided with a closing portion capable of closing and releasing the opening portion of the hook by a cylinder for holding the hooked state with respect to the hooking shaft.

(Operation) In the parent-child type forklift of the present invention configured as described above, when an upward force is applied to the tip of the leg during landing of the child lift, the child lift passes through the hook around the axis of the latch shaft. As a result, the hook is pivoted upward, which prevents the hook from exerting a moment. Also,
At the time of landing of the child lift, for example, when an upward force is applied to the leg base side, the closing portion abuts on the hooking shaft to hold the hooked state of the hook.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to the drawings. First, the embodiment shown in FIGS. 1 to 5 will be described. In the figure, 1 is a forklift main body which is a parent lift, 2 is a lift bracket which is guided for vertical movement by a mast 3 of the parent lift 1, 4 is a finger bar fixed to the upper and lower parts of the front surface of the lift bracket 2, and on the front surface thereof Is attached with a shift bracket 5 formed in a rectangular frame shape. The shift bracket 5 is hooked on the upper and lower finger bars 4 via hooks 6 provided on the upper and lower portions of the rear surface thereof, and a pair of left and right guide rollers 7 that can roll on the front surface of the lower finger bar 4 are provided on the lower portion. It is provided and can be moved laterally (vehicle width direction) by the shift cylinder 8. A remote control pallet truck, which is a child lift 13, is detachably attached to the shift bracket 5.

That is, the left and right upper ends of the shift bracket 5 are provided with a pair of left and right hooking shafts 9 made of a round bar for hooking a pair of left and right hooks 14 provided on the child lift 13 on the same horizontal axis. The left and right retaining shafts 9 are fixed to the plate 10 at the outer end and on the block-shaped pedestal 11 at the inner side, with a proper spacing from the upper end surface of the shift bracket 5. The plate 10 and the pedestal 11 are both fixed to the shift bracket 5. Further, behind the both retaining shafts 9, on the shift bracket 5, the hook guides 12 whose outer side surfaces are inclined surfaces 12a are provided.
The hook guides 12 on the left and right are fixed to the hook 1 when the hook 14 is hooked on the hook shaft 9.
4 functions as a guide and a positioning function.

On the other hand, the left and right hooks 14 of the child lift 13 are provided at the upper end of the rear surface of the main body 15, and the corners of the inner surface of the hook 14 are provided.
To the curved surface 14a. That is, the hook 14 is hooked so as to be rotatable relative to the hooking shaft 9, and an inclined surface 14b is formed on the inner surface of the tip of the hook 14, and the hook guide 12 is formed on the inner surface. Inclined surfaces 14c corresponding to the inclined surfaces 12a are formed. In addition, the main body 15 in the child lift 13
On the left and right of the upper part of the above, there are provided closing parts made up of cylinders 16 for holding the hooks 14 hooked on the hooking shaft 9. The cylinder 16 is installed at a position facing the gap between the hook shaft 9 and the shift bracket 5, and when the hook 14 is hooked, its piston rod 17 is provided.
Entry into the gap closes the opening portion of the hook 14. In the mounted state of the child lift 13 in which the hooks 14 are hooked on the hook shaft 9, the child lift 13 has a lower rear surface of the main body 15 of the child lift 13.
Is supported by abutting the lower front surface of the.

The present embodiment is configured as described above, and therefore,
In the mounted state of the child lift 13 in which the hook 14 of the child lift 13 is hooked on the hooking shaft 9 of the shift bracket 5, for example, when landing the child lift 13 on the floor surface of the container, the manner of landing or the state of landing In some cases, when the tip of the leg (fork) 18 receives an upward force as shown by the arrow in FIG. 5, the child lift 13 rotates upward around the axis of the latch shaft 9 via the hook 14. ,
This eliminates the action of the moment on the hook 14.

Further, the closed portion of the hook 14 formed of the cylinder 16 is brought into contact with the lower surface of the hook shaft 9 by abutting the lower surface of the hanging shaft 9 when the upward force acts on the base side of the leg 18 when the child lift 13 is landed. 14 is prevented from coming off the latch shaft 9. On the other hand, when the child lift 13 is disengaged from the parent lift 1, the piston rod 17 is retracted and retracted from the gap prior to that, and the opening portion of the hook 14 is released. Therefore, in this state, the child lift 13 can remove the hook 14 from the hook shaft 9.

On the other hand, the hook 14 of the child lift 13 is attached to the shift bracket 5
When the hook shaft 9 and the hook 14 are engaged with each other by a lateral displacement in the lateral direction, the shift cylinder 8 causes the shift bracket 5 to move to the left and right with respect to the finger bar 4. It is possible to correct the positional deviation by moving in the direction. Further, even a slight deviation can be absorbed by the relative slip between the inclined surface 12a of the hook guide 12 and the inclined surface 14c of the hook 14, and thereby the mounting position of the child lift 13 with respect to the shift bracket 5 is always fixed. Can be held.

In this embodiment, the shift bracket 5 is arranged on the front surface of the finger bar 4 and the latch shaft 9 for receiving the hook 14 of the child lift 13 is provided on the shift bracket 5, but the shift bracket 5 is omitted and the latch shaft 5 is omitted. 9 may be provided directly on the finger bar 4, and the latch shaft 9 may extend over the entire width of the finger bar 4 if necessary.

(Effect of the Invention) As described in detail above, according to the present invention, the hook shaft for receiving the hook of the child lift is formed into a round bar shape, and the inner corner of the hook hooked on the hook shaft is hooked. By forming the curved surface corresponding to the axis, the hook moment, which is a conventional problem when external force such as lifting the leg tip against the child lift is applied during cargo handling work, is eliminated.
The damage can be prevented, and the hook shaft can be smoothly engaged and disengaged with the hook shaft by forming the hook shaft from a round bar.

Further, in the present invention, since the child lift is provided with the closing portion capable of closing and opening the opening portion of the hook by the cylinder, it is possible to prevent the hook from being accidentally detached from the hook shaft.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a perspective view showing a state in which a child lift is separated from a parent lift side, and FIG. 2 is a side view in which a hook is hooked on a hook shaft. FIG. 3 is a rear view of the same, FIG. 4 is a plan view of the same, FIG. 5 is an overall side view of a state in which a child lift is coupled to a parent lift, and FIG. 6 is a side view showing a conventional example. 1 ... Parent lift, 4 ... Finger bar 5 ... Shift bracket, 9 ... Latch shaft 12 ... Hook guide, 12a ... Inclined surface 13 ... Child lift, 14 ... Hook 14a ... Curved surface, 14c …… Inclined surface 15 …… Main body, 16 …… Cylinder

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takayuki Miyano, 2-chome, Toyota-cho, Kariya city, Aichi Prefecture, Toyota Industries Corp. Incorporated (72) Inventor Akira Okura 1 Toyota-cho, Toyota-shi, Aichi Toyota Automobile Co., Ltd. (56) Bibliography SHO 61-113798 (JP, U)

Claims (4)

[Scope of utility model registration request] 1. A parent-child type forklift of a type in which a child lift is detachably hooked to a finger bar of a parent lift via a hook, and a round shape extending horizontally in the vehicle width direction above the finger bar. A bar-shaped hooking shaft is formed, and an inner corner of the hook hooked on the hooking shaft is formed into a curved surface corresponding to the hooking shaft. A parent-child forklift truck having a closing portion capable of closing and opening the opening portion of the hook by a cylinder for holding the hooked state of the forklift truck. 2. A pair of left and right hooks, which are hooked outwardly by being brought into contact with an inclined surface formed on an outer surface of a hook guide provided on the finger bar side when the hook is hooked on the hooking shaft. The parent-child forklift according to claim 1, which has a sloping surface for positioning which receives a pressing force. 3. The parent-child forklift according to claim 1, wherein the latching shaft is directly provided on the finger bar. 4. The parent-child forklift according to claim 1, wherein the latching shaft is formed on a shift bracket attached to the front surface of the finger bar so as to be laterally movable.