JP2893571B2 - Fork claw position fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fork claw position fixing device used for mounting a fork claw on a finger bar in a working machine of a forklift truck.

[0002]

2. Description of the Related Art As a working machine of a forklift truck, as shown in FIG. 1, a pair of right and left elevating bodies 1 which move up and down along a mast is provided. And a pair of left and right fork claws 3 is attached to the finger bar 2. And fork claw 3 to this finger bar 2
The upper hook 4 and the lower hook 5 provided at the upper end and the lower part of the rear surface of the fork claw 3 are engaged with the finger 2, respectively. Notch 6 with predetermined gap toward
A fork claw position fixing device 7 is mounted on the upper hook 4 provided at the upper end of the rear surface of the fork claw 3. A notch formed in the fork claw position fixing device 7 and the finger bar 2 is formed. 6 allows the fork pawls 3 to be mounted at desired positions on the left and right sides of the finger bar 2.

The conventional fork claw position fixing device 7
As shown in FIG. 2, the fork claw 3 is provided with a holder 11 which is fixed to a hole formed in the upper hook 4 of the fork claw 3 and has a vertical through hole 10 formed in the center.
A groove 12 extending in one lateral direction was formed in the upper center of the holder 11 so as to include the upper and lower through holes 10.
A vertically extending locking shaft 13 is inserted into the upper and lower through holes 10 of the holder 11, and the locking shaft 13 has a horizontal through hole 14 formed at an upper portion thereof and a collar portion 15 formed at a lower portion thereof. ing. Then, the lower portion of the holder 11 and the locking shaft 13
A compression spring 16 was interposed between the flange portions 15 of the helical member. On the other hand, a handle 17 having a hole through which a finger can be inserted is formed on the upper part of the locking shaft 13 via a pin 18.

[0004] In the fork claw position fixing device 7 as described above, when the fork claw 3 is shifted right and left along the finger bar 2, the handle 17 is lifted upward with the handle 17 so that the lower end of the handle 17 is raised. The lower end of the locking shaft 13 is disengaged from the notch 6 of the finger bar 2 by bringing the handle 17 into an upright state in contact with the upper surface of the holder 11.

When the position of the fork claw 3 is fixed to the finger bar 2, as shown in FIG. 3, the handle 17 is rotated by about 90 ° so that a lower side of the handle 17 is formed in the holder 11. The locking shaft 1
The lower end of the finger 3 is inserted into the notch 6 of the finger bar 2 and locked.

[0006]

In the conventional fork claw position fixing device, after the fork claw is fixed to the finger bar, that is, when carrying out a cargo handling operation, the handle has its lower side in the holder. Although it falls into
Since the upper side protruded above the holder and the lower end of the handle was a flat surface, the handle did not fall down well, and the handle often protruded upward from the holder. For this reason, if the handle protrudes upward during the cargo handling operation, there is a possibility that a problem may occur in that the baggage collides with the handle and the handle is damaged.

Further, this requires the operator to always check whether or not the handle has fallen after fixing the position of the fork claw to the finger bar, and to perform the work of knocking down the handle. was there. An object of the present invention is to solve these problems.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a holder which is fixed to an upper hook of a fork claw and has a vertical through-hole formed in the center thereof, and a vertically inserted through-hole of the holder. A locking shaft having a transverse through hole formed in the upper part thereof and extending in the lateral direction, and a collar part formed in the lower part, a compression spring interposed between the lower part of the holder and the collar part of the locking shaft, It is inserted into the transverse through hole of the locking shaft and is mounted on the upper portion of the locking shaft, and the lower end thereof is freely contactable with the upper surface of the holder. A fork claw position fixing device is constituted by a handle which is shifted in the vertical direction in a direction perpendicular to the axis in a direction perpendicular to the axis and which is formed in a substantially horizontal D-shape with a round bar.

[0009]

According to the present invention, a compression spring is used to shift the axial center position of the portion of the handle that is axially attached to the locking shaft and the axial center position of the portion that abuts on the holder in the direction perpendicular to the axis. When the downward force acting on the handle acts on the handle, a slight inclination of the handle causes the downward force acting on the handle to be converted into a force rotating the handle, The handle can easily fall down.

[0010]

[Embodiment] A first embodiment of a fork claw position fixing device according to the present invention will be described. The working machine of the forklift truck has the same configuration as the conventional one, and a fork claw position fixing device 7 is mounted on an upper hook 4 provided at the upper end of the rear surface of the fork claw 3 in this working machine.

As shown in FIGS. 4, 5, and 6, the fork claw position fixing device 7 includes a holder 11 which is fixed to a hole formed in the upper hook 4 of the fork claw 3. Has a stepped short cylindrical shape having a small circular portion 21 on the upper side and a large circular portion 22 on the lower side, and has an upper and lower through-hole 10 formed in the center thereof, and a small circular portion 21 on the upper side. At the center, a groove 12 extending in one lateral direction having a width dimension equal to the diameter of the upper and lower through holes 10 is formed.

The upper and lower through holes 1 of the holder 11
A cylindrical locking shaft 13 that is directed upward and downward is inserted into 0. The locking shaft 13 has a horizontal through hole 14 formed at its upper portion and a collar portion 15 formed at its lower portion. . Further, on the side part on the lower side of the collar part 15, a noodle part 23 is formed. Note that the locking shaft 13 may be configured such that its upper and lower middle portions are freely separable, and a screw mechanism is provided here.

A vertically extending compression spring 16 is interposed between the lower portion of the holder 11 and the flange portion 15 of the locking shaft 13.

A handle 17 having a substantially D-shape formed entirely of a round bar on the upper portion of the locking shaft 13 is attached to the locking shaft 13 by partially inserting the handle 17 into the horizontal through hole 14 of the locking shaft 13. I do. As shown in FIG. 7, the handle 17 has one end 24 thereof.
Is a straight line in the horizontal direction, and a small bent portion 25 is formed ahead of it,
A large bent portion 26 bent to the opposite side beyond the small bent portion 25
Is formed, a curved portion 27 which is greatly curved therefrom is formed, and a large bent portion 28 is further formed therefrom. D
The one end 24 is inserted into the lateral through hole 14 of the locking shaft 13, and the lower end of the large bent portion 26 and the other end 29 are attached to the upper surface of the holder 11. The upper surface of the small circular portion 21 or the bottom surface of the groove 12 can be freely contacted. And in the handle 17,
As shown in FIG. 8, the axial center position of the one end 24 inserted into the lateral through hole 14 of the locking shaft 13, that is, the axial center position A of the portion that is axially attached to the locking shaft 13, Other end 2
9 is the axial center position B of the portion in contact with the holder 11
Are shifted vertically in the direction perpendicular to the axis. Also,
The small bent portion 25 and the other end portion 29 come into appropriate contact with the outer periphery of the locking shaft 13 so as to prevent the handle 17 from floating in the axial direction with respect to the locking shaft 13. Has become.

In such a fork claw position fixing device 7, when the fork claw 3 is shifted right and left along the finger bar 2, as shown in FIG. The large bent portion 26 and the other end 29 which are the lower end of the handle 17 are connected to the small circular portion 2 of the holder 11.
The locking shaft 13 is moved upward so as to abut on the upper surface 1 so that the lower end of the locking shaft 13 is removed from the notch 6 of the finger bar 2.

When the position of the fork claw 3 is fixed to the finger bar 2, as shown in FIG. 10, the handle 17 is rotated by about 90 ° to form the lower side of the handle 17 on the holder 11. The locking shaft 13 is moved downward so as to be dropped into the groove 12 so that the lower end of the locking shaft 13 is inserted into the notch 6 of the finger bar 2 and locked. From this state, in the handle 17, the downward force of the compression spring 16 is applied to the portion that is pivotally attached to the locking shaft 13. At this time, the handle 17 is pivotally attached to the locking shaft 13. The axial center position A of the portion and the axial center position B of the portion abutting on the holder 11 are vertically displaced in the direction perpendicular to the axis, and the portion abutting on the holder 11 becomes a curved surface by being formed of a round bar. As a result, with a slight inclination of the handle 17, the downward force acting on the handle 17 is converted into a force for rotating the handle 17, and as shown in FIG. Will fall easily.

The fork claw position fixing device 7 thus constructed
After the fork claw 3 is fixed in position on the finger bar 2, that is, when a cargo handling operation or the like is performed,
The handle 17 is stored in the groove 12 of the holder 11 so that the handle 17 can easily fall down. Therefore, it is possible to prevent the handle 17 from protruding above the holder 11 and to prevent damage to the handle 17 due to collision of luggage or the like. Can be prevented.

After the fork claw 3 is fixed to the finger bar 2, the handle 17 can easily fall down, so that the worker does not have to perform the work of tilting the handle 17 each time. It is possible to reduce troublesome work.

Next, a second embodiment of the fork claw position fixing device according to the present invention will be described. As shown in FIG. 11, FIG. 12, and FIG.
As in the first embodiment, a holder 11 having an upper and lower through hole 10 which is fixed to a hole formed in the upper hook 4 of the fork claw 3 is provided.
A cylindrical locking shaft 13 having a flange portion 15 formed in a lower portion is inserted into the lower portion, a compression spring 16 is interposed between the lower portion of the holder 11 and the flange portion 15 of the locking shaft 13, and A handle 17 having a round bar shape and an overall substantially D-shape is pivotally mounted on the upper part of the handle 13, and this handle 17 is different from that of the first embodiment.

As shown in FIG. 14, one end 24 of the handle 17 is made a straight line in the lateral direction, and a small bent portion 25 is formed at the end thereof. A large bent portion 26 is formed, a large curved portion 27 is formed from the large bent portion 26, and a large bent portion 28 is further formed therefrom. The one end 24 is inserted into the horizontal through hole 14 of the locking shaft 13, and the large bent portion 26, which is the lower end thereof, and the other end are inserted. The portion 29 can freely contact the upper surface of the small circular portion 21 which is the upper surface of the holder 11 or the lower surface of the groove 12. 15 (a), (b), and FIG.
As shown in (a) and (b), the axial center position of the one end 24 inserted into the lateral through hole 14 of the locking shaft 13, that is, the axial center position A of the portion that is fitted to the locking shaft 13, is large. Bent part 26
The axis center position B of the portion where the and the other end 29 abut on the holder 11 is shifted in the vertical direction in the direction perpendicular to the axis, and also shifted in the horizontal direction.

As a result, the compression spring 1 is attached to the handle 17.
6, when a downward force is exerted, the shaft center position A of the portion that is attached to the locking shaft 13, the large bent portion 26 and the other end 2
9 is the axial center position B of the portion in contact with the holder 11
13 is shifted in the vertical and horizontal directions in the direction perpendicular to the axis, so that the downward force acting on the handle 17 is converted into the force for rotating the handle 17, and FIG. As shown in the figure, the handle 17 always falls down.

Further, since the operator always falls down after fixing the position of the fork claw 3 to the finger bar 2, the operator can drop the handle 17 one by one at the time of the work, and whether the handle 17 has fallen. Need not be confirmed, and it is possible to further reduce troublesome work.

The fork claw position fixing device 7 thus constructed
After the fork claw 3 is fixed in position on the finger bar 2, that is, when a cargo handling operation or the like is performed,
Is stored in the groove 12 of the holder 11 and always falls down, so that the handle 17 can be prevented from protruding above the holder 11, and damage to the handle 17 caused by collision of luggage or the like can be reduced. It can be further prevented.

[0024]

According to the present invention, the axial center position A of the portion of the handle that is axially attached to the locking shaft and the axial center position B of the portion that abuts on the holder are vertically displaced in the direction perpendicular to the axis. When the contacting portion has a curved surface, the downward force of the compression spring acting on the handle acts on the handle. With a slight inclination of the handle, the downward force acting on the handle will rotate the handle. And the handle can easily fall down. Further, by shifting the axial center position A of the portion that is axially attached to the locking shaft and the axial center position B of the portion that abuts on the holder in the handle in the vertical direction in the direction perpendicular to the axis, and also in the lateral direction, When the downward force of the compression spring acts on the handle, the downward force acting on the handle is converted into the force of rotating the handle, so that the handle always falls down. become. Thus, when carrying out cargo handling work, the handle is stored in the groove of the holder, and the handle can easily or always fall down, so that the handle does not protrude upward, and the baggage or the like is damaged by collision. Problems can be eliminated. In addition, since the handle can easily or always fall down, it is not necessary for the operator to perform the work of tilting the handle one by one at the time of the work, and it is possible to reduce the trouble of the work.

[Brief description of the drawings]

FIG. 1 is a perspective view of a working machine of a forklift truck.

FIG. 2 is a longitudinal sectional view illustrating a state of a conventional fork claw position fixing device.

FIG. 3 is a side view illustrating a state of a conventional fork claw position fixing device.

FIG. 4 is a top view of the fork claw position fixing device according to the first embodiment of the present invention.

FIG. 5 is a front sectional view of the fork claw position fixing device according to the first embodiment of the present invention.

FIG. 6 is a side view of the fork claw position fixing device according to the first embodiment of the present invention.

FIG. 7 is an explanatory view of a handle in the fork claw position fixing device of the first embodiment.

FIG. 8A is a partially detailed front view of a handle in the fork claw position fixing device of the first embodiment. (B) Partial detailed side view of the handle in the fork claw position fixing device of the first embodiment.

FIG. 9 is a side view illustrating the state of the fork claw position fixing device according to the first embodiment.

FIG. 10 is a side view illustrating the state of the fork claw position fixing device according to the first embodiment.

FIG. 11 is a top view of a fork claw position fixing device according to a second embodiment of the present invention.

FIG. 12 is a front sectional view of a fork claw position fixing device according to a second embodiment of the present invention.

FIG. 13 is a side view of a fork claw position fixing device according to a second embodiment of the present invention.

FIG. 14 is an explanatory view of a handle in the fork claw position fixing device according to the second embodiment.

FIG. 15A is a partially detailed front view of a handle in the fork claw position fixing device according to the second embodiment. (B) Partial detailed side view of the handle in the fork claw position fixing device of the second embodiment.

FIG. 16A is a partially detailed front view of a handle in the fork claw position fixing device according to the second embodiment. (B) Partial detailed side view of the handle in the fork claw position fixing device of the second embodiment.

[Explanation of symbols]

1 ... lifting body, 2 ... finger bar, 3 ... fork claw, 4 ...
Upper hook, 5 ... Lower hook, 6 ... Notch, 7 ... Fork claw position fixing device, 10 ... Vertical through hole, 11 ... Holder, 12 ... Groove, 13 ... Locking shaft, 14 ... Lateral through hole, 15
... collar, 16 ... compression spring, 17 ... handle, 18 ...
Pin, 21: small circle portion, 22: large circle portion, 23: chamfered portion,
24: one end, 25: small bend, 26: large bend, 27
… A curved part, 28… a large bent part, 29… the other end.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Hei 3-36000 (JP, U) Registered utility model 3000158 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B66F 9 / 00-11/04

Claims (2)

(57) [Claims] 1. A holder 11 which is fixed to an upper hook 4 of a fork claw 3 and has a vertical through-hole 10 formed in the center thereof, and is inserted into the vertical through-hole 10 of the holder 11 to face up and down. A locking shaft 13 having a horizontal through hole 14 formed in an upper portion thereof and a collar portion 15 formed in a lower portion, and a compression interposed between the lower portion of the holder 11 and the collar portion 15 of the locking shaft 13. A spring 16 inserted into the lateral through hole 14 of the locking shaft 13
And the lower end thereof is attached to the holder 11.
And a shaft center position A of a portion axially attached to the locking shaft 13 and a shaft center position B of a portion abutting on the holder 11 are vertically displaced in a direction orthogonal to the axis, and a round bar material is provided. A handle 17 having a substantially D-shape as a whole. 2. In the handle 17, an axis center position A of a portion that is axially attached to the locking shaft 13 and an axis center position B of a portion that abuts on the holder 11 are laterally shifted in a direction orthogonal to the axis. The fork claw position fixing device according to claim 1, wherein: