JPS60236997A - Attached instrument for forklift - Google Patents

Abstract

An accessory 50 for use with the tines 36 of a forklift in unloading cargo 44 from a container 42 where the cargo has a lifting bar 60. The accessory comprises a framework having a pair of tine accepting chambers 54 and a pair of lifting bar engaging hooks 58 depending from the framework. <IMAGE>

Description

[Detailed Description of the Invention] Tatsuji Gengo■ The present invention is an accessory for a forklift truck, more specifically, it is used for loading and unloading fragile cargo into and out of commercial containers of the type loaded on trucks, ships, and railroad wagons. This invention relates to an accessory as a fork extension part of a telescopic boom type forklift.

The present invention is particularly suitable for retrieving missiles and pots with lifting trunks from 20 foot (6 meter) commercial containers1 and is particularly suitable for retrieval of missiles and pots from 20 foot (6 meter) commercial containers,1 and when a 71 load tank is not available (in a military environment). is particularly useful for Typical of these containers are vertical cross section or 8
Fee 1 - (8 feet) by 8 feet, 20 feet long, and open at one end.

Traditionally, boom-type forklifts utilize a telescoping boom, which is typically mounted on a carriage with two forks.

It is operably connected to the boom by a fork attachment or a hydraulic cylinder, which may be subordinate to the cylinder which operates the boom. In this way, the fork attachment can be maintained in a relatively horizontal position regardless of lateral rotation of the boom.

When the boom was extended to a nearly horizontal position, the forklift attachment Φ was vertical, and the fork teeth connected to this attachment I were designed to maintain it at a 90 degree angle in a nearly horizontal position. . Thus, when the boom is in a nearly flat position, the forklift attachment has a very high profile. This significantly limits the ability to move tightly packed pallets or containers into and out of truck-trailer or trailer-mounted pans.

In view of the limitations inherent in conventional forklift trucks, various unloading methods have been proposed, but all of these methods have deficiencies.

#iI when using a Tingtong forklift to remove pallets from truck-mounted containers at the work site? It has been proposed to use a four-way route, allowing forklifts to enter the container and remove the cargo. This method has the drawbacks of requiring a portable ramp and requiring the forklift itself to be frequently moved in and out of the container.

A "slip sheet" method of pallet removal has also been proposed, in which a plastic or metal sheet is placed on the floor of the container and the pallets are placed on top of this sheet. When loading a container, this "slip sheet" is pulled from the container to the flatbed tractor. Once in the flatbed trunk, pallets can be unloaded from one side of the truck with a regular forklift. This method suffers from tearing of the slip sheet and is also problematic when the flatbed truck is not completely flush with the container. In this case, the slip sheet or the flatbed truck could shift and cause the Paré, i, and F to fall.

When unloading a missile pot from a container, attach an extra tie to the missile pond and pull it toward the edge of the missile-bod container until at least half of the missile pot overhangs the edge of the container. is normal. First, the first forklift is engaged with the front of the missile dock to prevent it from falling, and the second forklift is approached from one side of the missile dock so that the center of gravity is at the center of gravity. Engage missile pot. This allows the missile pound to be lifted from its container and transported to its destination. This loading method requires the missile pot to be awkwardly balanced on the edge of the container and requires three types of machinery: one to pull the pot out of the container and one to support the drawn end of the pound. , requires three types of machinery to engage the center of the bond and remove it from the container.

The object of the present invention is to
・・Trucks and trailers transport fragile cargo such as
) - To provide equipment of the category I for forklift attachments that are designed to load and unload cargo from rail loading pans, containers, etc.

Forklift attachments for boom-type forklifts used to move fragile cargo into and out of commercial containers of a given length. It includes a fork tooth retaining part.

According to another feature of the invention, the accessory includes a pair of carry rod engaging hooks suspended from its frame.

According to another feature of the invention, the entire device has a low profile, facilitating easy entry into the cargo loading container.

According to another feature of the invention, the attachment device is dimensioned to engage the lifting cup before and after being placed on the teeth of the forklift truck.

Thus, the present invention can be applied to Forklift I...Attackman I
- Ideal for loading and unloading trunks, trailers, trailers, containers, etc., as the boom can be maintained in the same water level without being located almost in the water. Forklift Atanchimen!・Use 4
Provide related equipment. According to the present invention, the forklift attachment has a very low profile, allowing the boom and forklift attachment to be inserted into narrow trailers and container ships. Maintaining a low profile is important when containers of a given size are used on trailers and container ships.

The fork teeth of a forklift attachment must be able to engage the cargo and lift it out of deep recesses and keep the height clearance very small.

Horizontal movement of the fork teeth facilitates the precise positioning required for engagement with the lifting body of the missile φ-bod or for sliding under a cargo pallet. Horizontal movement of the fork teeth also allows the cargo to be moved in a horizontal plane prior to removal from the container, separating the cargo from the container walls and adjacent cargo.

A telescoping boom forklift 10 includes a telescoping boom 12 having an inner end 14 that is pivotally attached to a rough terrain vehicle having a body 16. The body 16 is constructed as described in US Pat. This patent is of the type described in this patent (the disclosure content of which is incorporated herein by reference), and is equipped with a leveling device that allows the vehicle body to be tilted relative to the wheel frame. It can be used especially on rough terrain.Typical forklifts of this type include:
Approximately 24 feet (7.2 meters) long in transport position, @
96 inches (244 cm), 8 feet high
(2,4 meters) (boom horizontal).

As is common in this type of machine, hydraulic cylinders 18 are utilized to position boom 12 at various angles relative to the horizontal plane.

An extension 20 is pivotally connected to the outer end 22 of the boom 12 by an extension root 24 and a hydraulic cylinder 26, and a mounting plate 24
The pivot axis of the cylinder 26 to the extension 20 is as shown.
The extension can be swung to a level substantially aligned with and beyond the longitudinal axis of the boom 12.

The inner end of the extension 20 is provided with a pair of lights 27, which are fixed to the sides of the extension 20 so that they can follow the movement of the extension 20.

As shown in FIG.
and an outer end 30 of the extension 20 by a hydraulic cylinder 34.
It is pivoted to. Thus, the fork assembly 28 is capable of pivoting in a vertical plane, which pivoting is entirely dependent on the pivoting of the boom 12 and/or the pivoting of the extension 20.

As best seen in FIG. 1, the fork assembly 28 includes a pair of telescoping hydraulic cylinders 38 which are mounted to effect horizontal movement of the fork teeth 36. .

The horizontal movement of the fork teeth 36 is powered, and more particularly hydraulically driven, so that each fork tooth 36 can move independently of one another. Additionally, each fork tooth can be moved past the centerline 120 of the extension 20, with both fork teeth 36 located on opposite sides of the centerline 120.

As can be seen in the figures, fork assembly 28 is normally maintained in a horizontal plane. Traditionally, this has been done by the operator using the judgment of experience by manipulating the hydraulic cylinder controls, and by automatic equipment 1 which can be actuated if desired by the operator. For example, a fork cylinder 34 may be provided subordinate to the boom cylinder 18 to maintain the load level during a lifting operation, with rotation of the boom 12 causing a corresponding movement of the fork assembly 28, and The object was kept in an almost horizontal position.

However, due to the number of possible positions of the extension 20, maintaining the horizontal position of the fork assembly 28 cannot be accomplished by subordinating the fork cylinder 34 to the boom Φ cylinder 18. For example, FIG. 1 shows the extension 20 in a substantially vertical position, i.e., the hydraulic cylinder 26 is substantially fully retracted, the fork teeth 36 are substantially parallel to the horizontal plane, and the boom 12 is substantially horizontal. It's completely drawn in. FIG. 2 discloses the boom 12 fully extended and the extension 20 partially extended, these positions being achieved by the cylinder 26, which engages the fork teeth 36 with the pallet 40; can support it.

The gap 2 between the extension boom 12 and the top wall of the container 42 is shown in distance. Therefore, cylinder 18 can no longer be extended to raise boom 12 and lift pallet 40. Therefore, pallet 4
In order to hold 0 to a certain extent, hydraulic cylinder 2
6 and rotate the extension part 20, pallet I.40
must be lifted. As explained below, the fork teeth 36 must remain within a small range of motion relative to the horizontal plane.

FIG. 3 shows a vehicle lO unloading a cargo 44, and the extension 20 must lie in a plane substantially parallel to the horizontal plane defined by the cargo 44. In this state, the distance is again just a small gap. boom 12
is shown in a substantially fully retracted position, with hydraulic cylinder 18 also in a substantially fully retracted position to provide the necessary low profile clearance between the top wall of container 42 and mounting plate 24. As shown in FIG. 2, the fork teeth 36 must be substantially horizontal to the plane defined by the cargo 44. To maintain a low profile, cylinder 1
8 can only be adjusted to a limited extent when lifting and removing the cargo 44 from the container 42. therefore,
The hydraulic cylinder 26 is almost fully extended and the extension 2
0 in the same plane as the fork teeth 36. Since the fork teeth 36 can be rotated independently, the hydraulic cylinder 3
4 will maintain the fork teeth 36 in a horizontal plane during adjustment of the extension 20.

FIG. 4 shows vehicle 10 removing a pallet 40 from a container 42 located in an elevated position, such as on the floor 45 of a truck. In this example, boom 12 is substantially fully extended and hydraulic cylinders 26.34 are partially extended to position fork teeth 36 below pallet 40. Pallet 40 is lifted by raising boom 12 for the first time. After retracting boom 12 slightly, pallet 40 may be further lifted by extending cylinder 26.

FIG. 5 shows the vehicle 10 unloading cargo 44 from an elevated container 42, and the extension 20 must be in a generally easterly plane with respect to the horizontal plane defined by the cargo 44. Boom 12 is slightly raised by cylinder 18 and partially extended. Hydraulic cylinder 26.3
4 is fully extended and extends the extension 20 to the fork teeth 36.
Place it on the same side as

Fork assembly 28 includes a leveling circuit 29 shown schematically in FIG. Leveling circuit 29 includes a pendulum switch 31 located on fork assembly 287 immediately after cylinder 38.

Although other forms of automatic leveling equipment may be used, P
-Model No. 410 from Q Controls, Inc.
It has been found that a swing R-switch, such as that sold under the trade name No. 1, meets the particular needs of this application. The pendulum switch 31 is mounted at an angle such that the switch 31 detects a state in which the fork teeth 36 are tilted by two degrees as horizontal. The pendulum of the switch 31 swings along a path substantially parallel to the longitudinal axis of the fork teeth 36 and is adjusted to generate a signal when a predetermined angle within the range of 1 to 3 degrees is detected. be done. The output of switch 31 is sent to select switch 33, which is used to remove switch 31 from the circuit and connect manual controller 3.
7 can be used. Pendulum switch is extension part 2
At 01, the proportional solenoid control valve 39 installed behind the plate 35 is connected to the operating state via the switch 33.

This control valve 39 controls the fluid entering the hydraulic cylinder 34. Upon sensing the off-water condition of the fork assembly 28, the swing f switch 31 sends a signal to the solenoid control valve 39 and hydraulic fluid flows from the pump 41 to the cylinder 34 to maintain the fork assembly 28 in a relatively horizontal position. do.

FIG. 2 illustrates the use of a forklift attachment in removing the pallet 40 from the front within the container 42. Although Figures 2 and 3 show the cargo container on the ground or at the same level as the forklift 10, it may be possible to unload the container from a higher position, such as when the forklift 10 is supported by a truck/trailer. It should be understood that it is particularly suitable for Here, boom 12
is extended to approximately its maximum length and the extension 20 is positioned at the proper angle to further extend the fork extension and position the fork assembly 28 under the pallet. The horizontal movement of the fork teeth 36 is particularly useful in this task. That is, the various cargo pallets) 40 have different fork tooth receiving areas, and the forklift 10
This is because they are not always completely consistent. Since these situations can occur in only one cargo handling operation, the fork teeth 36 have a wide range of horizontal movement, including movement from their outermost position shown in FIG. 1 to positions beyond the center fi 120. and align both fork teeth 36 with the center line 12.
It can be positioned on one side of 0.

Also, during the transfer, the pallet 40 is displaced and the container 4
It is also common to engage two walls or an adjacent pallet. A light horizontal movement of the fork teeth 36 will dislodge the pallet 40, and the valet 40 can then be extended by retracting the telescoping boom 12 or retracting the forklift axle 10 from the container 42. I can do it.

FIG. 3 illustrates the use of forklift 10 in removing a cargo-loaded container or bod 44, such as a missile bod, from container 42. In this operation, the forklift IO utilizes a dual hooked fork tooth attachment 50.

The attachment 50 consists of a rectangular frame structure 52 that is divided by a center plate 56 into a pair of fork tooth receiving chambers 54 . A pair of lift bar engaging hooks 58 are attached to the frame structure 52 and project toward the sides, with one hook 58 centrally located on the side of each chamber 54. Attached equipment 5
The total island of the 0 is approximately 9 inches (23 centimeters--Torr), so as not to compromise the low profile. In such a situation, extension 20 and fork assembly 28
This is because its low profile is very advantageous. Bod 4
Each of the pots 4 is provided with a recessed holding bar 60 located within the opening 62 and approximately at the center of gravity of the pot 44. Again, hold
In that the L bar 60 does not extend across the entire width of the body 44, the horizontal-movement of the fork teeth 36 and the resulting horizontal movement of the hollowed out appendage 50 is very important.

As can be seen in FIG. 3, the fork @36 is positioned horizontally and inserted into the chamber 54. The old appliance 50 may be manually engaged with the lifting bar 60 and then the fork teeth 36 inserted into the chamber 54, or alternatively, the old appliance 50 may be placed on the fork 1i36-1- with the lift cup 60. They may be positioned to engage. Extension 20 is moved to a generally horizontal position and fork assembly 28 is maintained in a generally horizontal position. The hook 58 is then positioned behind the lever 60 and toward the opening 62. next.

Drop the hook 58 into the opening 62, move it forward, and finally lift the rear part 64 of the hook 58.
engage with. The bod 44 can then be lifted slightly and, if necessary, moved into the water 11 as described above and separated from the container wall or adjacent bods. Next, preferably the boom 12 is retracted if it is in the extended position, or the forklift I
Pot 4 by retreating from container 42
4 can be taken out from the container 42.

Although FIG. 2.3 shows only two uses of the invention and are not shown, the extension 20 and fork assembly 28 can be positioned in countless combinations, and this type of forklift extension The potential uses for the part are also nearly limitless.

It should be understood that there are various ways to carry out the invention within the scope defined in the individually claimed claims, particularly pointing out the subject matter of interest as an invention. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a boom-type forklift utilizing the present invention. FIG. 2 is a schematic side view of the forklift 9 of FIG. 1, showing a pallet being removed from a container placed on the ground. FIG. 3 is a schematic side view of a forklift utilizing the present invention, shown in the upper A position, removing a pot from a container on the ground. FIG. 4 is a schematic side view of the forklift truck shown removing a pallet from a container placed on a raised truck floor. FIG. 5 is a side view of the forklift of FIG. 3 shown with the bod removed from a container placed on the raised truck floor 1-. 6 is a side view of a dual hook fork tooth attachment constructed in accordance with the present invention and shown in use in FIG. 3; FIG. 7 is a front view of the fork tooth attachment of FIG. 4; FIG. FIG. 8 is a schematic diagram of the leveling circuit utilized to maintain the fork teeth in a substantially horizontal position. 0 In the drawing, 10φ... forklift, 12...
Boom, 16--Heavy body, 18--Hydraulic cylinder, 2
0...Extension part, 24...Additional plate, 26...Combined hydraulic cylinder, 28@-fork assembly body, 34...Hydraulic cylinder, 36ψ...Fork teeth, 40. Competition pare・Nt, 42・φ conflict container, 44・Q11 cargo, 50...
Knee heavy hook type fork teeth accessory, 54...Chamber, 58...Holder bar engagement hook, 60...Holder bar, 62...Opening agent included Patent attorney Akira Kawano

Claims (4)

[Claims] (1) A fork tooth attachment for a boom-type forklift for removing cargo with a lifting rod from a container, the fork tooth engagement portion releasably connecting at least one of the fork teeth to the fork tooth attachment. and a lift bar engagement portion capable of releasably engaging a fork-toothed appendage with the lift bar to lift the container during relative upward movement of the boom. Features a fork tooth attachment. (2) The fork tooth attachment of claim 1, wherein the frame structure has at least one chamber into which the fork tooth can be inserted, and is suspended from the frame structure and engageable with the lifting bar. and at least one hook. (3) The fork tooth accessory according to claim 2, wherein the frame structure constitutes a pair of chambers, each chamber receiving one of the fork teeth, and a pair of chambers each receiving one of the fork teeth. A cup engagement hook hangs from each chamber.
A fork toothed instrument characterized by its angled shape. (4) A method for removing a container for transporting cargo M from an enclosure accessible through a single opening, wherein the container is approximately rectangular and a lifting rod is arranged in a recess provided in the container in the width direction of the container. have, have”
In the method, the container is arranged in the enclosure such that the longitudinal axis of the bar extends substantially horizontally to the seven sides of the opening with respect to the enclosure. Inserting a lifting rod engagement means connected to a telescoping boom through the opening in the enclosure. The holding rod engaging means is positioned above the recess of the container. Dropping the lifting rod engaging means into the recess, and engaging the lifting rod with the lifting rod retaining means. A method comprising: lifting the container; and retracting the holding bar engagement means from the enclosure through the opening.