JP3039728B2 - Fork fixing device for full rotation fork attachment - 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 fixing device for a full rotation fork attachment.

[0002]

2. Description of the Related Art As shown in FIG. 10 and FIG. 11, a stopper bolt SB having a thread groove N is formed on a stopper plate SP fixed to a fork F and a through hole PH having a thread groove N and a stopper. The fork F is prevented from being laterally displaced by being inserted into and fixed to the insertion hole I formed in the fork bar FB abutting on the plate SP.

[0003]

However, in the above-mentioned conventional technique, it is necessary to use a tool to change the position of the fork F, so that it takes time and effort.

Further, in the prior art, a load is applied to the stopper bolt SB due to the rotation of the full-rotation fork attachment, so that there is a problem that the thread groove portion N of the stopper bolt SB is damaged.

Therefore, the present inventor has proposed a stopper bolt SB
Instead of using a stopper pin, focus on the technical idea of the present invention that the locking member is always eccentrically locked with respect to the stopper pin inserted into the through hole of the stopper plate, and further research and development As a result of stacking, the tool eliminates the need for attaching and detaching the stopper bolt when changing the position of the fork, saving time and labor, and achieving the purpose of eliminating the problem of damage to the screw groove of the stopper bolt due to rotation of the full rotation fork attachment Reached the present invention.

[0006]

A fork fixing device for a full-rotation fork attachment according to the present invention (a first invention according to claim 1) penetrates a through hole formed in a stopper plate fixed to a fork. The stopper pin inserted in the insertion hole formed in the fork bar that contacts the stopper plate, and the hole for inserting or removing the stopper pin are always eccentric with respect to the stopper pin inserted in the through hole of the stopper plate. And a locking member that locks the stopper pin by being locked by.

[0007] In the fork fixing device for a full-rotation fork attachment according to the present invention (a second invention according to a second aspect), in the first invention, the locking member is a small-diameter fixed width formed on the stopper pin. And a fixing member fixed to the stopper plate and having a hole for inserting or removing a stopper pin and locking the ring member.

The fork fixing device for a full-rotation fork attachment according to the present invention (a third invention according to a third aspect) relates to the first invention, wherein the locking member is always eccentric with respect to the stopper pin. A locking member for positioning the locking member to be stopped is added.

[0009]

According to the first aspect of the present invention, the fork is fixed by the through-hole formed in the stopper plate fixed to the fork and the stopper pin inserted into the insertion hole formed in the fork bar. The hole for inserting or removing the stopper pin is always eccentrically locked to the stopper pin inserted into the through hole of the stopper plate, so that the stopper pin is locked and the locking member is moved. The fork can be moved to a predetermined position by aligning the position of the hole of the locking member with the stopper pin and pulling out the stopper pin, and the fork can be fixed by inserting the stopper pin again and locking by the locking member. .

In the second invention device having the above-mentioned structure, the fork is fixed by a through-hole formed in a stopper plate fixed to the fork and a stopper pin inserted into an insertion hole formed in the fork bar. By locking a ring member, which is always engaged by its own weight, with a small-diameter portion having a fixed width formed on the stopper pin constituting the stopper pin by a fixing member fixed to the stopper plate, the stopper pin is locked and the ring is locked. By moving the member to release the engagement between the ring member and the small diameter portion of the stopper pin and pulling out the stopper pin through the hole of the fixing member, the fork can be moved to the predetermined position, and the stopper pin is inserted again. The fork can be fixed by engaging the ring member.

[0011] In the third invention device having the above-described structure, the fork is fixed by a through-hole formed in a stopper plate fixed to the fork and a stopper pin inserted into an insertion hole formed in the fork bar, and the lock member is used to fix the fork. The stopper pin is locked by positioning the locking member so that the locking member is always eccentrically locked with respect to the stopper pin, and the locked state of the locking member is released to move the locking member. The fork can be moved to a predetermined position by aligning the hole of the stop member with the position of the stopper pin and pulling out the stopper pin.If the stopper pin is inserted again and the locking member is locked and positioned by the lock member, Can fix fork.

[0012]

According to the first aspect of the present invention, the position of the fork can be changed by aligning the position of the hole of the locking member with the stopper pin and pulling out the stopper pin. A tool is not required for attachment and detachment, saving time and labor. In addition, since the stopper pin has no screw groove, the problem of damage to the screw groove of the conventional stopper bolt due to rotation of the full rotation fork attachment has been solved.

According to the second aspect of the present invention, the position of the fork can be changed by moving the ring member to release the engagement between the ring member and the small diameter portion of the stopper pin and pulling out the stopper pin. Since it is possible, no tools are required for attaching and detaching the stopper pin, saving time and labor, and changing to a stopper pin with no screw groove part, the problem of damage to the screw groove part of the conventional stopper bolt due to rotation of the full rotation fork attachment has been changed. Resolved.

According to the third aspect of the present invention, the locking member is unlocked, the locking member is moved, the hole of the locking member is aligned with the stopper pin, and the stopper pin is pulled out. Since the position can be changed, a tool is not required for attaching and detaching the stopper pin, saving time and labor.In addition, since the locking member is used to position the locking member, the possibility of the stopper pin falling off is eliminated, and the screw groove portion is provided. The problem of damage to the threaded groove of the conventional stopper bolt due to rotation of the full-rotation fork attachment has been eliminated because the stopper pin has been changed to one that does not have a pin.

[0015]

Next, embodiments of the present invention will be described in detail.

(First Embodiment) A fork fixing device for a full-rotation fork attachment according to a first embodiment is an embodiment of the second invention and is applied to a forklift truck as shown in FIG. As shown in FIG. 6, a small-diameter portion that penetrates a through hole 21 formed in a stopper plate 2 fixed to the fork 1 and is inserted into an insertion hole 31 formed in a fork bar 3 disposed in contact with the stopper plate 2. A stopper pin 4 having a stopper pin 41, a ring member 51 which engages with the small diameter portion 41 of the stopper pin 4 by its own weight, and a member fixed to the stopper plate 2;
And a fixing member 52 having a hole 52H for inserting or removing the ring member 51 and locking the ring member 51.

The stopper pin 4 has a rod-like solid cylindrical body 40.
The head is beveled, and the head is formed with a small-diameter portion 41 with a smaller diameter than the other portions, such as the neck,
A substantially U-shaped knob 42 is provided at the tip of the head, inserted into the through hole 21 of the stopper plate 2, penetrated, and inserted into the insertion hole 31 of the fork bar 3.

The ring member 51 constituting the locking member 5 includes
The outer diameter and the inner diameter each having a length slightly shorter than the width of the small diameter portion 41 of the stopper pin 4 are each formed of a circular ring larger than the outer diameter of the stopper pin 4.
Is engaged.

The fixing member 52 constituting the locking member 5 includes
It is constituted by a substantially cross-shaped plate member 52P having a plurality of concave portions 52V, and has four small holes 5 for bolts 52B at four tip portions 52T.
2C is formed, and a stopper pin 4
A hole 52H having an inner diameter slightly larger than the outer diameter of the stopper pin 4 for inserting or removing the fixing member 52 is formed.
It is fixed to the stopper plate 2 by bolts 52B via a spacer 52S slightly longer than the length of the ring member 51 between the stopper plate 2 and the stopper plate 2.

Since the ring member 51 is always engaged with the small-diameter portion 41 of the stopper pin 4 even if the fork 1 rotates 360 degrees, the stopper pin 4 The ring member 51 is locked by the ring member 51 of the locking member 5 engaged with the stopper pin 41. Since the ring member 51 is engaged with the small-diameter portion 41 of the stopper pin 4, the stopper member 4 and the hole 52H have an axial center. Since the axis is shifted and eccentric, it is locked by the fixing member 52, so that the stopper pin 4 is locked and the fork 1 is fixed.

In the first embodiment, when the position of the fork 1 is changed, the ring member 51 engaged with the small-diameter portion 41 of the stopper pin 4 is replaced with the concave portion 52 of the cross-shaped fixing member 52.
The small-diameter portion 41 and the ring member 51
When the fork 1 is removed from the through hole 21 and the insertion hole 31 and the fork 1 is moved to a desired position, and the stopper pin 4 is inserted again, the fork is removed. Fix 1

The device of the first embodiment having the above-described operation is such that the ring member 51 is arranged coaxially with the stopper pin 4 by hand, and the fork is bare handed without using a tool such as a spanner or an eyeglass wrench. 1 can be moved and fixed, so that there is an effect that troublesomeness is eliminated and workability is improved.

In the first embodiment, even if vibration, rotation, impact or the like of the full-rotation fork attachment is applied, unless the ring member 51 is arranged coaxially with the stopper pin 4, the ring member 51 The engagement with the small diameter portion 41 provides an effect that the stopper pin 4 does not come off.

(Second Embodiment) A fork fixing device for a full-rotation fork attachment according to a second embodiment is an embodiment of the first invention, and as shown in FIGS. 7 and 8, the locking member of the first embodiment. 5 has two members, a ring member 51 and a fixing member 52, but is characterized in that it is constituted by a single simple locking member 7, and the differences from the first embodiment will be mainly described. .

The stopper pin 6 has a rod-shaped solid cylindrical body 60.
And a substantially U-shaped knob 61 is provided at the tip of the head. The knob 61 is inserted into the through hole 21 of the stopper plate 2 to penetrate therethrough, and is inserted into the insertion hole 31 of the fork bar 3. Has been inserted.

The locking member 7 is composed of a circular plate member 70. Three circular holes 72 for the bolts 73 are formed at intervals of 120 degrees in the peripheral portion and have an inner diameter sufficiently larger than the shaft diameter of the bolts. At the center, a hole 71 having an inner diameter slightly larger than the outer diameter of the stopper pin 6 for inserting or removing the stopper pin 6 is formed.
3 because of its own weight due to the difference in the shaft diameter of 3
The center of the hole 71 is eccentric with respect to the axis of the stopper pin 4 inserted into the stopper plate 2 by the contact of the upper part with the bolt, so that the stopper pin 4 is locked.

The apparatus of the second embodiment having the above-described structure has the same operation and effect as the first embodiment except that the structure is simple.

(Third Embodiment) A fork fixing device for a full-rotation fork attachment according to a third embodiment is an embodiment of the third invention as shown in FIG.
And a locking member 9 for mutually locking the stopper pins, and has a feature in a structure for more reliably preventing the stopper pins from coming off against vibration, rotation, impact, and the like of the fork.
The following description focuses on the differences from the second embodiment.

The locking member 8 for locking the stopper pin 6 similar to that of the second embodiment is composed of a rectangular plate member 80 inserted in the case 83, and the stopper pin 6 is inserted or inserted in the center. A hole 81 having an inner diameter slightly larger than the outer diameter of the stopper pin 6 for extracting is formed.
Are arranged and urged downward.

The lock member 9 is constituted by a rectangular parallelepiped member 90 having a step portion 91 on one surface. The lock member 9 is inserted into the hole 93 formed in the stopper plate 2 in parallel with the through hole 21 so as to abut against the spring 92. The portion 91 contacts the lower portion of the locking member 8 in FIG. 9 to lock the locking member 8 at a position where the hole portion 81 is eccentric upward with respect to the stopper pin 6, and the locking member 9 is engaged with the step portion 91. Since they are locked by the lower part of the stop member 8, they are mutually locked.

When removing the stopper pin 6, the locking member 9 may be pushed rightward in the drawing against the spring 92, and the locking member 8 may be lowered to align with the axis of the stopper pin 6.

The apparatus according to the third embodiment having the above-described structure can more reliably prevent the stopper pin from coming off against vibration, rotation, impact, and the like of the fork, and can provide the same effects as those of the above-described embodiment.

The above-described embodiments have been described by way of illustration, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view showing an engagement state of a stopper pin of the device of the first embodiment.

FIG. 3 is an enlarged front view showing an engaged state of a stopper pin of the first embodiment.

FIG. 4 is a longitudinal sectional view showing an engagement state of a stopper pin of the first embodiment.

FIG. 5 is a front view showing an engagement state of a stopper pin of the first embodiment.

FIG. 6 is a side view showing a forklift truck to which the device of the first embodiment is applied.

FIG. 7 is an enlarged vertical sectional view taken along the line II of FIG. 8 showing an engagement state of a stopper pin of the device of the second embodiment.

FIG. 8 is an enlarged side sectional view showing an engagement state of a stopper pin of the device of the second embodiment.

FIG. 9 is an enlarged side sectional view showing an engagement state of a stopper pin of the device of the third embodiment.

FIG. 10 is an exploded perspective view showing a conventional device.

FIG. 11 is a longitudinal sectional view showing an engagement state of a stopper bolt of the conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fork 2 Stopper plate 3 Fork bar 4, 6 Stopper pin 5, 8 Locking member 9 Lock member 21 Through hole 31 Insertion hole 41 Small diameter part 42 Knob part 51 Ring member 52 Fixing member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66F 9/12 B66F 9/14 F16B 21/16

Claims (3)

(57) [Claims] A stopper pin which penetrates a through hole formed in a stopper plate fixed to a fork and which is inserted into an insertion hole formed in a fork bar abutting on the stopper plate; and a stopper pin for inserting or removing the stopper pin. A locking member for locking the stopper pin by locking the hole in a state where the hole is always eccentric with respect to the stopper pin inserted into the through hole of the stopper plate. Fork fixing device. 2. The ring member according to claim 1, wherein the locking member is a ring member that constantly engages with a small-diameter portion having a constant width formed on the stopper pin by its own weight, and a member fixed to a stopper plate. A fork fixing device for a full-rotation fork attachment, comprising a fixing member having a hole for inserting or removing a stopper pin and locking a ring member. 3. A full rotation according to claim 1, further comprising a lock member for positioning the locking member so that the locking member is always eccentrically locked with respect to the stopper pin. Fork fixing device for fork attachment.