JPH0656397A - Fork clamping device of total rotational fork attachment - Google Patents

Abstract

PURPOSE:To solve a problem on damage to a thread of a topper bolt due to rotation of a fork of a toral rotational fork attachment by improving the extent of working properties by way of dispensing with any tool at the time of detachment of this stopper bolt at fork movements. CONSTITUTION:This total rotational attachment's fork clamping device is composed of a stopper pin 4 provided with a small diametral part 41, piercing through a through hole 21 formed in a stopper plate 2 clamped to a fork 1, and being inserted into an insertional hole 31 formed in a fork bar 3 to be contacted and set up in the stopper plate 2 and an engaged member 5 consisting of a ring member 51 engaging, by its own weight, with a small diametral part 41 of the stopper pin 4 and a clamping member 52 being a member attached tight to the stopper plate 2, having a hole part 52H for inserting or extracting the stopper pin 4 and engaging the ring member 51.

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 In the prior art, as shown in FIGS. 10 and 11, a stopper bolt SB having a screw groove portion N is formed in a stopper plate SP fixed to a fork F, and a through hole PH having a screw groove portion N and a stopper. The fork F is prevented from lateral displacement by inserting and fixing it in the insertion hole I formed in the fork bar FB that contacts the plate SP.

[0003]

In the above prior art, there is a problem that it is necessary to remove the fork F using a tool in order to change the position of the fork F, which requires time and labor.

Further, in the conventional technique, there is a problem that the screw groove portion N of the stopper bolt SB is damaged because the load acts on the stopper bolt SB due to the rotation of the full-rotation fork attachment.

Therefore, the inventor has found that the stopper bolt SB
Instead of the above, a stopper pin is used, and the technical idea of the present invention that the locking member is locked in a state where it is always eccentric with respect to the stopper pin inserted into the through hole of the stopper plate, and further research and development is conducted. As a result of stacking, the purpose of removing the stopper bolt when changing the position of the fork is to eliminate the need for tools, save time and effort, and solve the problem of damage to the screw groove of the stopper bolt due to rotation of the full-rotation fork attachment. The present invention has been reached.

[0006]

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

A fork fixing device for a full-rotation fork attachment according to the present invention (a second invention according to claim 2) is the fork fixing device according to the first invention, wherein the locking member has a small diameter with a constant width formed on the stopper pin. The ring member is a member that is constantly engaged with the member by its own weight, and a fixing member that is fixed to the stopper plate and that has a hole for inserting or withdrawing the stopper pin and that locks the ring member.

The fork fixing device for a full-rotation fork attachment of the present invention (the third invention according to claim 3) is different from the first invention in that 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]

In the first invention device having the above-mentioned structure, 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, and the locking member is fixed. The hole for inserting or withdrawing the stopper pin is locked with the stopper pin inserted in the through hole of the stopper plate always eccentric to lock the stopper pin and move the locking member. 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 with the locking member. .

In the second invention device having the above structure, 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, and the locking member is provided. A ring member that constantly engages with a small diameter portion of a constant width formed in the stopper pin that constitutes the above by its own weight is locked by a fixing member fixed to the stopper plate, thereby locking the stopper pin and the ring. By moving the member to release the engagement between the ring member and the small diameter part of the stopper pin and pulling out the stopper pin through the hole of the fixing member, you can move the fork to the predetermined position, and insert the stopper pin again. The fork can be fixed by engaging the ring members with each other.

In the third invention device having the above-mentioned structure, the fork is fixed by the through hole formed in the stopper plate fixed to the fork and the stopper pin inserted in the insertion hole formed in the fork bar, and the fork is fixed by the lock member. The stopper pin is locked by positioning the locking member so that the locking member is locked in a state where the locking member is always eccentric 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 position of the hole of the stop member with the stopper pin and pulling out the stopper pin.If the stopper pin is inserted again and the locking member is locked and the locking member is positioned, Forks can be fixed.

[0012]

In the first invention device having the above-described operation, the position of the fork can be changed by aligning the position of the hole of the engaging member with the stopper pin and pulling out the stopper pin. No tools are required for attachment / detachment, saving time and labor, and changing to a stopper pin without a thread groove eliminates the problem of damage to the thread groove of the conventional stopper bolt due to rotation of the full-rotation fork attachment.

In the second invention device having the above-mentioned operation, 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 to remove the stopper pin without using a tool, it saves time and effort, and since it has been changed to a stopper pin without a 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 is eliminated. Resolved.

In the device of the third invention having the above-mentioned operation, the lock state of the lock member is released, 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 effort, and since the locking member is positioned by the lock member, the possibility of the stopper pin falling off is eliminated, and the screw groove Since it has been changed to a stopper pin that does not have, the problem of damage to the thread groove of the conventional stopper bolt due to rotation of the full-rotation fork attachment has been solved.

[0015]

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

(First Embodiment) A fork fixing device for a full-rotation fork attachment according to the first embodiment is a second embodiment of the 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 the stopper plate 2 fixed to the fork 1 and is inserted into an insertion hole 31 formed in the fork bar 3 arranged in contact with the stopper plate 2. The stopper pin 4 provided with 41, a ring member 51 that 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 locking member 5 having a hole portion 52H for inserting or removing the ring member 51 and locking the ring member 51.

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

The ring member 51 constituting the locking member 5 is
The small diameter portion 41 of the stopper pin 4 is formed of a circular ring having an outer diameter and an inner diameter that are slightly shorter than the width of the small diameter portion 41 of the stopper pin 4.
Is engaged with.

The fixing member 52 which constitutes the locking member 5 has four
It is composed of a substantially cross-shaped plate member 52P having a plurality of concave portions 52V, and the small holes 5 for the bolts 52B are provided at the four tip portions 52T.
2C is formed, and a stopper pin 4 is formed at the center.
A hole 52H having an inner diameter slightly larger than the outer diameter of the stopper pin 4 for inserting or withdrawing the fixing member 52 is formed.
And the stopper plate 2 are fixed to the stopper plate 2 with a bolt 52B via a spacer 52S slightly longer than the length of the ring member 51.

In the apparatus of the first embodiment having the above-mentioned structure, the ring member 51 is always engaged with the small diameter portion 41 of the stopper pin 4 even if the fork 1 is rotated 360 degrees, so that the stopper pin 4 has a small diameter portion. 41 is locked by the ring member 51 of the locking member 5 engaged with 41, and since the ring member 51 is engaged with the small diameter portion 41 of the stopper pin 4, the stopper pin 4 and the hole portion 52H with respect to the axial center thereof. Since the shaft center is displaced 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 recess 52 of the cross-shaped fixing member 52.
By placing V on the stopper pin 4 and the fixing member 52 coaxially, the small diameter portion 41 and the ring member 51
When the stopper pin 4 is grasped from the through hole 21 and the insertion hole 31 and the fork 1 is moved to a desired position, the stopper pin 4 is reinserted. Fix 1

In the device of the first embodiment having the above-mentioned operation, the ring member 51 is arranged coaxially with the stopper pin 4 by hand, and the fork is forked with bare hands without using a tool such as a spanner and a box wrench as in the conventional case. Since 1 can be moved and fixed, there is an effect that the trouble is eliminated and the workability is improved.

In addition, in the device of the first embodiment, even if vibration, rotation, impact or the like of the full-rotation fork attachment is given, the ring member 51 does not move to the stopper pin 4 unless the ring member 51 is arranged coaxially with the stopper pin 4. Since the small diameter portion 41 is engaged, the stopper pin 4 is prevented from coming off.

(Second Embodiment) A fork fixing device for a full rotation fork attachment of the 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 configured by a simple locking member 7 of one member, and the description will focus on the differences from the first embodiment. .

The stopper pin 6 is a rod-shaped solid cylindrical body 60.
And has a chamfered tip, a substantially U-shaped knob 61 is provided at the tip of the head, and is inserted into the through hole 21 of the stopper plate 2 and penetrates 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, and three circular holes 72 having an inner diameter sufficiently larger than the shaft diameter of the bolt are formed in the peripheral portion at intervals of 120 degrees for the bolt 73. In addition, a hole portion 71 having an inner diameter slightly larger than the outer diameter of the stopper pin 6 for inserting or withdrawing the stopper pin 6 is formed in the central portion, and the inner diameter of the circular hole 72 and the bolt 7
Since it is lowered by its own weight due to the difference in the shaft diameter of 3, the circular hole 72
Since the center of the hole 71 is eccentric with respect to the axis of the stopper pin 4 inserted into the stopper plate 2 due to the contact between the upper part of the bolt and the bolt, the stopper pin 4 is locked.

The device of the second embodiment having the above-mentioned structure has the same effects as the device of the first embodiment except that the structure is simpler.

(Third Embodiment) A fork fixing device for a full-rotation fork attachment of the third embodiment is an embodiment of the third invention as shown in FIG. 9, and a locking member 7 of the second embodiment.
A lock member 9 for locking each other with respect to the fork is added, which is characterized in that the stopper pin is more reliably prevented from coming off against vibration, rotation, impact, etc. of the fork.
The difference from the second embodiment will be mainly described.

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 central portion. A hole portion 81 having an inner diameter slightly larger than the outer diameter of the stopper pin 6 for extracting is formed.
Is arranged and is urged downward.

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

When the stopper pin 6 is pulled out, the lock member 9 may be pushed rightward in the figure against the spring 92, and the locking member 8 may be lowered to align with the axial center of the stopper pin 6.

The device of the third embodiment having the above-mentioned structure more reliably prevents the stopper pin from coming off against vibration, rotation, impact or the like of the fork, and has the same effect as that of the above-mentioned embodiment.

The embodiments described above are merely examples for the purpose of explanation, and the present invention is not limited to them. Those skilled in the art will recognize from the claims, the detailed description of the invention and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.

[Brief description of drawings]

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

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

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

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

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

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 cross-sectional view taken along the line II of FIG. 8 showing the engagement state of the stopper pin of the second embodiment device.

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

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

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

FIG. 11 is a vertical cross-sectional view showing an engaged state of a stopper bolt of a conventional device.

[Explanation 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

Claims (3)

[Claims] 1. A stopper pin inserted into an insertion hole formed in a fork bar, which penetrates a through hole formed in a stopper plate fixed to a fork and abuts against the stopper plate, and for inserting or withdrawing the stopper pin. A full-rotation fork attachment, characterized in that the hole portion comprises a locking member that locks the stopper pin by being locked in a state where it 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 is constantly engaged with a small diameter portion of a constant width formed in the stopper pin by its own weight, and a member fixed to the stopper plate. A fork fixing device for a full-rotation fork attachment, comprising a fixing member having a hole for inserting or withdrawing a stopper pin and locking a ring member. 3. The full rotation according to claim 1, further comprising a lock member for positioning the locking member so that the locking member is locked in a state where the locking member is always eccentric with respect to the stopper pin. Fork fixing device for fork attachment.