JP2003112897A - Device for mounting side shift cylinder for cargo handling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for mounting a side shift cylinder, facilitating connection between a fork and the side shift cylinder. SOLUTION: A mounting hole 13a as a mounting portion is provided passing through a bracket 12a on the back of the fork. A rod 16 of the side shift cylinder is continuously formed with a head portion 16a, a locking portion 16b, a fitting portion 16d and a flange 16c in sequence from its end. A lock plate 15 has a recessed portion 15a. A mutual relationship, s1>d1>s2>s4>d2>s3, is established among a diameter s1 of the flange 16c, a diameter s2 of the fitting portion 16d, a diameter s3 of the locking portion 16b, a maximum diameter s4 of the head portion 16a, a diameter d1 of the mounting hole 13a and a width d2 of the recessed portion 15a. The rod 16 is elongated by the operation of the side shift cylinder 10 and the head portion 16a is inserted into the mounting hole 13a of the bracket 12a. The lock plate 15 is fitted to the locking potion 16b protruding from the B surface of the bracket 12a of the rod 16 and the rod 16 is joined and fixed to the bracket 12a of the fork 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for a cargo handling vehicle, and more particularly to a mounting device for a side shift attachment cylinder that moves a cargo handling support member such as a fork or a ram using a cylinder.

[0002]

2. Description of the Related Art Some attachments mounted on a forklift, which is a cargo-handling vehicle, have a fork, a ram, etc. for supporting a cargo to move left and right, such as a side shift attachment. FIG. 8 is a view showing a mounting portion of the fork and the fork of the side shift attachment. Lifting member 60 for side shift attachment
Is a pair of upper and lower finger bars 61a and 61b and left and right tie plates 6 that connect the finger bars 61a and 61b.
2 and upper and lower two-stage side shift cylinders 63 whose base ends are supported by the tie plate 62. A rear portion of the elevating member 60 is attached to a lift bracket (not shown) and can be moved up and down along the mast.

The tip end of the cylinder rod 63a of the side shift cylinder 63 is a cylindrical mounting portion 63b, and a pin hole 63c for mounting an attachment such as a fork is vertically provided. The two forks 65 are suspended on the upper finger bar 61a so as to be movable in the left-right direction.
Pin holes 66a are vertically provided through brackets 66, which are attached to the back surface of the fork 65 in two steps.

The mounting portion 63b of the cylinder rod 63a is made to face between the upper and lower brackets 66, and the pin hole 63c of the cylinder rod 63a and the pin hole 66 of the bracket 66 are provided.
After the a is vertically aligned, the pin 68 is inserted to attach the side shift cylinder 63 and the fork 65.

[0005]

However, in this configuration, it is not easy to align the pin hole 66a of the bracket 66 and the pin hole 63c of the cylinder rod 63a with each other, and a plurality of people are required, and the pin 68 is used. A tool etc. were required when inserting the. Therefore, there has been a problem that replacement of the cargo handling support member such as a fork at the work site becomes complicated. In view of the above problems, it is an object of the present invention to provide a side shift cylinder mounting device that facilitates connection of a cargo handling support member.

[0006]

In order to solve the above-mentioned problems, according to the invention of claim 1, the head is attached to the rod tip portion of the side-shifting cylinder whose base end is attached to an elevating member which can be moved up and down along the mast. And a rear surface of the fork attached to the elevating member in a laterally movable manner by continuously forming a locking portion having a diameter smaller than the maximum diameter of the head portion, a fitting portion, and an abutting portion on the cylinder side from the head portion. A bracket on which a mounting portion having a diameter larger than the maximum diameter portion of the head portion and smaller than the contact portion is formed, and with the rod fitted to the mounting portion of the bracket, the head portion and the bracket In the locking part located between
The gist is that a lock plate having a recess having a width smaller than the diameter of the head is locked.

According to the present invention, by extending the rod, positioning and connection between the rod and the cargo handling support member such as a fork are automatically performed. Further, both are easily fixed by locking the lock plate.

According to the second aspect of the present invention, at the position facing the rod in the concave portion of the lock plate, there is provided a jumping-up preventing member including a pressure contactor and a biasing member for biasing the pressure contactor toward the rod. The point is to have prepared.

According to the present invention, when the lock plate is locked to the locking portion, the pressure contact is retracted in the direction of the lock plate, and when the lock plate is locked to the rod, the pressure contact is pressed against the rod so that a fork or the like is formed. The lock plate will not fall off even if it vibrates.

In the invention of claim 3, the gist is that the head portion is formed in a conical shape.

According to the present invention, the head portion is automatically aligned and inserted into the mounting portion of the bracket.

In the invention of claim 4, the lock plate is attached to the bracket so as to be movable up and down.
The gist is that it can move up and down by interfering with the head and can be automatically locked.

According to the present invention, when the rod is inserted into the recess of the lock plate, the lock plate is pressed by the head of the rod and moves upward, and when the rod and the fork are fitted, the lock plate is locked. The plate is automatically moved downward to maintain the fitted state.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view showing a side shift attachment structure portion. Left and right forks 1 as shown
Is horizontally movably mounted on a finger bar 6 which is a part of an elevating member 3 which ascends and descends along the mast 2 of the forklift.

More specifically, the elevating member 3 includes a lift bracket that moves up and down along the mast 2 or a rear plate 4 integrally connected to the lift bracket, and an upper bar 5a and a lower bar 5b that are vertically fixed to the front sides of both rear plates 4, respectively. It is composed of upper and lower finger bars 6 and 7. A holder 51 is attached to the upper bar 5a, and the upper finger bar 6 having a columnar shape is horizontally fixed to the front portion of the rear plate 4 by the holder 51. Similarly, the lower finger bars 7 are provided on the lower front portions of both rear plates 4.
Are horizontally fixed to the front portion of the rear plate 4. Further, the upper finger bar 6 and the lower finger bar 7
And are connected to each other by a tie plate 8 at the left and right ends.

In the left and right forks 1, a suspension portion 1b provided at the upper end of the upright portion 1a is suspended by the upper finger bar 6, and a lower rear portion of the upright portion 1a is brought into contact with the front surface of the lower finger bar 7. It is supported so that it can move laterally. Two side shift cylinders 10 are vertically arranged at a predetermined distance between the upper finger bars 6 and the lower finger bars 7 and slightly rearward between the upright portions 1a of the left and right forks 1. Are arranged in a shape. The side shift cylinder 10 is held by a first holder 52 attached to the upper bar 5a and a second holder 53 attached to the lower bar 5b to maintain a horizontal state.

Each of the side shift cylinders 10 has its base end fixed to the tie plate 8 via a bracket 11. The rod 16 is attached to the rear surface of the upright portion 1a of the one fork 1 via the bracket 12a,
It is fixed and connected by 5.

As shown in FIGS. 2 and 3, the bracket 12a provided on the upright portion 1a of the fork 1 has a vertically oriented plate portion 13 having a mounting hole 13a as a mounting portion.
And a support portion 14 that supports the lock plate 15 from below.

The rod 16 has a head 16a at its tip.
On the side shift cylinder 10 side of the head portion 16a, a locking portion 16b, a fitting portion 16d, and a flange 16c as a contact portion are continuously formed.

The diameter s4 of the head portion 16a is set so that it can be fitted into the mounting hole 13a, and the diameter s3 of the locking portion 16b is the maximum diameter s4 of the head portion 16a and the diameter s2 of the fitting portion 16d.
It has a smaller diameter. The length h1 of the locking portion 16b is shorter than the thickness h2 of the plate portion 13. Further, the diameter s1 of the flange 16c is formed to be larger than the diameter d1 of the mounting hole 13a, and the cylinder side A surface of the plate portion 13 can contact the flange 16c. The head 16a of the rod 16 is formed in a conical shape so that it can be aligned with the mounting hole 13a.

The lock plate 15 has a recess 15a which can be locked by the locking portion 16b of the rod 16. The front-rear width d2 of the recess 15a is the diameter of the head 16a and the fitting portion 16d. It is configured to be smaller than the diameter and larger than the diameter of the locking portion 16b.

The diameter s1 of the flange 16c, the diameter s2 of the fitting portion 16d, the diameter s3 of the locking portion 16b, and the maximum diameter s of the head portion 16a.
4, the diameter d1 of the mounting hole 13a and the width d2 of the recess 15a are s1>d1>s2>s4>d2> s3.

As shown in FIG. 4, the rod 16 and the engaging portion 16 in the portion where the recess 15a of the lock plate 15 is formed.
Holes 18 into which the detent balls 17 as a pair of pressure contactors are inserted are respectively provided at positions corresponding to the lower part of the axis b. A convex shape 18a is formed on the inner peripheral edge of the hole portion 18 facing the concave portion 15a, and the detent ball 17 taken into the hole portion 18 is hooked by the convex stripe 18a to prevent excessive protrusion. .

A lock bolt 20 is screwed into the outside of the hole 18 via a lock nut 19. A spring 21 as a biasing member is interposed between the lock bolt 20 and the detent ball 17. Detent ball 1
7 and the urging force of the spring 21 lock plate 1
5 bounce prevention member is constructed. The spring 21
As a result, a preload is applied to the detent ball 17 toward the locking portion 16b, and in a normal state, a part of the detent ball 17 is in a state of protruding toward the locking portion 16b.

The fork 1 and the side shift cylinder 10 in the side shift cylinder mounting device constructed as described above are mounted as follows.

By operating from the driver's seat, the side shift cylinder 10 is operated and the rod 16 is operated to the extension side, and the head portion 16a thereof is inserted into the mounting hole 13a of the plate portion 13 projecting from the rear side of the fork 1. To do. At this time, since the tip of the head 16a has a conical shape, the mounting hole 13a
While passing through the mounting hole 13a while aligning with respect to
While the rear end of 6a reaches the lock plate side B surface of the plate portion 13 of the mounting hole 13a, the front end portion of the fitting portion 16d of the rod 16 begins to fit on the cylinder side A surface of the mounting hole 13a.
By the further extension operation of the rod 16, the fitting portion 16d of the rod 16 moves in the mounting hole 13a, and the flange 1
The operation of the cylinder 10 is stopped when 6c comes into contact with the surface A of the plate portion 13 on the cylinder side. At this time, the locking portion 16b of the rod 16 is in a state of protruding from the B surface of the plate portion 13 on the lock plate 15 side. By fitting the recess 15a of the lock plate 15 into the locking portion 16b, the bracket 16 on the rear surface of the rod 16 and the fork 1
The binding with 2a is completed.

When the lock plate 15 is fitted into the engaging portion 16b of the rod 16 from above, the detent ball 17 contacts the outer periphery of the engaging portion 16b. When the lock plate 15 is further pushed, the detent ball 17 is pressed into the hole 18 by the outer peripheral surface of the locking portion 16b, and the spring 18 contracts and retracts in the direction of the lock plate 15. In the state where the lock plate 15 is fitted to the rod 16 (see FIG. 4), the pressing force from the locking portion 16b decreases, so that the detent ball 17 partially projects into the recess 15a again and the locking portion 16b. The lower part is slightly pressed from both sides. As a result, the coupled state between the locking portion 16b and the lock plate 15 is maintained.

The following effects are obtained in this embodiment.

(1) Rod 16 Since the head portion 16a of the rod 16 has a conical shape, the rod 16 is only extended and the rod 16 is automatically aligned with the mounting holes 13a of the plate portion 13 at the separated positions. Since the fitting operation is performed, it is not necessary for the operator to perform the alignment.

(2) By simply fitting the lock plate 15, it is possible to maintain the engaged state of the rod 16 and the fork 1 without using a tool.

(3) Even if there is a small-diameter locking portion 16b between the head portion 16a and the fitting portion 16d, the length h1 of the locking portion 16b is the thickness of the plate portion 13 that guides the rod 16. Since it is shorter, the fitting portion 16d of the rod 16 reaches the mounting hole 13a before the head portion 16a passes through the mounting hole 13a of the plate portion 13. Therefore, the engaging portion 16b having a small diameter does not interfere with the mounting hole 13a to prevent the rod 16 from moving, and a smooth fitting operation of the rod 16 and the bracket 12a is performed.

(4) In the pushed lock plate 15, since the detent ball 17 is attached to the lower portion below the central axis of the rod 16, it should be removed unless the lock plate 15 is pulled up by a human force. There is no.

(5) Since the pulling force of the lock plate 15 can be adjusted by changing the pushing amount of the lock bolt 20, it can be adjusted to the force desired by the operator.

(6) The detent ball 17 is the rod 16
Slightly press the lower part from both sides. As a result, the lock plate 15 is less likely to fall off the rod 16 due to vibration of the fork, etc., and the coupled state of the rod 16 and the lock plate 15 is fixed.

(Second Embodiment) The above first embodiment is
The second embodiment in which the mounting hole shape of the bracket on the rear surface of the fork is changed will be described with respect to a portion different in configuration from the first embodiment. The same components as those in the first embodiment are designated by the same reference numerals.

As shown in FIG. 5, the upright portion 1 of the fork 1
The bracket 12b attached to the rear surface of the a is composed of a plate portion 26 and a support portion 14. Plate part 2
A mounting groove 26a serving as a U-shaped fitting portion is provided in the upper portion of 6 through. The head 16a of the rod 16 is fitted into the mounting groove 26a of the bracket 12b on the rear surface of the fork 1. As a result, the rod 16 and the fork 1 are connected.

The following effects are obtained in this embodiment.

(1) Mounting hole 13a as in the first embodiment
The U-shaped mounting groove 26a can be said to be easier to align the rod 16 because there are few places where the U-shaped mounting groove 26a can contact the head 16a.

(Third Embodiment) The above first embodiment means
The third embodiment in which the configuration of the lock plate is changed will be described with respect to the difference in configuration from the first embodiment. The same components as those in the first embodiment are designated by the same reference numerals.

As shown in FIG. 6, the upright portion 1 of the fork 1
The bracket 12c attached to the rear surface of the a is composed of a plate portion 30 and a support portion 14. Plate part 3
No. 0 has a mounting hole 30a in the center and a pivot pin hole 30b for connecting to the lock plate 15 on the rear end side of the lower part.

On the other hand, a rotary pin 32 is attached to one end of the lock plate 15 at a position corresponding to the rotary pin hole 30b. The head 16a of the rod 16 has a mounting hole 30a.
And the rod 16 and the fork 1 are coupled to each other.
After the flange 16c of the rod 16 comes into contact with the surface A of the plate portion 30 on the cylinder side and the alignment is completed, the locking portion 1
6b, the lock plate 15 is rotated about the rotation pin 32, and the recess 15a of the plate 15 is fitted into the locking portion 16b of the rod 16 to fix the connection between the rod 16 and the fork 1.

The third embodiment has the following effects.

(1) Lock plate 15 and bracket 1
Since 2c can be integrated, it is not necessary to separately consider the place where the lock plate 15 is placed when exchanging the fork 1 or the like, and the cause of loss is eliminated.

(Fourth Embodiment) The above-mentioned first embodiment is
The fourth embodiment in which the shapes of the bracket and the lock plate provided on the back surface of the fork are changed will be described with respect to the parts different in configuration from the first embodiment. The same components as those in the first embodiment are designated by the same reference numerals.

As shown in FIG. 7, the upright portion 1 of the fork 1
The bracket 12d attached to the rear surface of the a is composed of the plate portion 35 and the support portion 14. The plate portion 35 is provided with a mounting hole 35a at substantially the center thereof, and two pins 35b extending in the lock plate direction are provided above the hole 35a.

On the other hand, at both ends of the U-shape forming the recess 37a of the lock plate 37, there are provided guide grooves 37b which allow only vertical movement with the pin 35b as a guide.

The head portion 16a of the rod 16 is the plate portion 35.
The rod 16 and the fork 1 are inserted into the mounting holes 35a of the
Are combined. At this time, the conical shape of the head portion 16a presses the concave portion 37a of the lock plate 37, and the guide groove 37b is guided by the pin 35b, so that the lock plate 37 is pushed upward and the head portion 16a further advances. . The flange 16c of the rod 16 is the plate portion 35.
When contacting the surface A on the cylinder side, the head portion 16a also passes through the concave portion 37a of the lock plate 37 and does not push up the plate 37, so that the lock plate 37 descends along the guide pin by the guide groove 37b. As a result, the lock plate 37 is attached to the locking portion 16b of the rod 16.
The recess 37a is automatically fitted to fix the connection between the rod 16 and the bracket 12d of the fork 1.

The fourth embodiment has the following effect in addition to the effect (1) of the third embodiment.

(1) Using the conical shape of the head 16a of the rod 16, the lock plate 37 is raised at the same time when the head 16a is inserted into the mounting hole 35a, and the head 16a passes through the recess 37a of the plate 37. After that, it can be lowered and engaged with the cylinder rod 16. Therefore, the driver can perform the work of connecting the fork 1 and the side shift cylinder 10 without leaving the driver's seat.

The above embodiment can be modified and implemented as follows.

In the claims and the above-mentioned embodiment, the member for supporting the cargo is a "fork", but another cargo supporting member such as a ram may be used.

In the above embodiment, the head 16a of the rod 16 is formed in a conical shape, but it may be in a cylindrical shape. Further, as a configuration capable of aligning with the mounting hole of the bracket, it is conceivable that the rod 16 head portion is spherical or tapered.

In the above embodiment, the flange 16c formed on the rod 16 is used as the contact portion,
The structure of the contact portion is not limited to this. For example, without providing the flange 16c, the rod diameter may be increased to use the rod itself as an abutting portion, or the rod and the flange may be configured as separate members.

In the above embodiment, the locking portion 16b
The fitting portion 16d and the fitting portion 16d have different diameters, but they may have the same diameter.

In the above embodiment, the engaging portion 16b, the fitting portion 16d, and the flange are continuously formed on the rod 16. However, the rod is not necessarily made of one member, and it should be made of a plurality of members. Is also possible.

In the above embodiment, when the flange 16c abuts the plate portion 13 of the fork 1 due to the extending motion of the rod 16, the side shift cylinder 1 is moved.
0 is stopped, but the side shift cylinder 10 is further operated in the abutting state to move the fork 1 to the rod 1
6 Side shift cylinder 10 after moving to the extension side
It is also possible to stop the operation of.

[0058]

According to the invention described in claim 1, the rod of the cylinder and the fork are easily connected.

According to the second aspect of the present invention, the lock plate reliably maintains the connection between the rod of the cylinder and the fork.

According to the third aspect of the present invention, since the head portion is automatically aligned with the fitting portion, the fitting portion and the head portion are more reliably aligned.

According to the fourth aspect of the present invention, the driver can perform the connecting work between the rod of the cylinder and the fork only by the operation from the driver's seat.

[Brief description of drawings]

FIG. 1 is a front view of a side shift attachment according to a first embodiment.

FIG. 2 is a perspective view showing a connecting portion between a rod of a cylinder and a bracket of a fork according to the first embodiment.

FIG. 3 is a cross-sectional view of a connecting portion between a rod and a bracket of the cylinder of the first embodiment.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a perspective view showing a connecting portion between a rod of a cylinder and a bracket of a fork according to a second embodiment.

FIG. 6 is a perspective view showing a connecting portion between a rod of a cylinder and a bracket of a fork according to a third embodiment.

FIG. 7 is a perspective view showing a connecting portion between a rod of a cylinder and a bracket of a fork according to a fourth embodiment.

FIG. 8 is a diagram showing a connecting portion between a fork and a cylinder rod in the related art.

[Explanation of symbols]

2 masts 3 Lifting member 10 Side shift cylinder 16 rod 16a head 16b Locking part 16c Flange as abutting part 16d fitting part 1 fork 13a, 26a Mounting holes and mounting grooves as mounting portions 12a, 12b, 12c, 12d bracket 15a, 37a recess 15,37 Lock plate 17 Detent ball as a pressure contactor 21 A spring as a biasing member.

Claims (4)

[Claims] 1. A head portion is provided at a rod tip portion of a side shift cylinder having a base end attached to an elevating member capable of ascending and descending along a mast, and a diameter smaller than a maximum diameter of the head portion is closer to the cylinder side than the head portion. The engaging portion, the fitting portion, and the contact portion are continuously formed, and the rear surface of the fork mounted laterally on the elevating member has a diameter larger than the maximum diameter portion of the head and the contact portion. A bracket having a smaller-diameter mounting portion is attached, and with the rod fitted to the mounting portion of the bracket, the locking portion located between the head and the bracket is more than the diameter of the head. An attachment device for a side shift cylinder in a cargo handling vehicle, characterized in that a lock plate having a narrow recess is locked. 2. A jump-up prevention member comprising a pressure contactor and a biasing member for biasing the pressure contactor toward the rod is provided at a position facing the rod in the recess of the lock plate. The mounting device for a side shift cylinder in a cargo handling vehicle according to claim 1. 3. The attachment device for a side shift cylinder in a cargo handling vehicle according to claim 1, wherein the head portion is formed in a conical shape. 4. The cargo handling according to claim 3, wherein the lock plate is attached to the bracket so as to be movable up and down, moves vertically by interfering with the head, and is automatically lockable. A device for mounting a side shift cylinder in a vehicle.