JP2563254Y2 - Forklift attachment / detachment machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift attachment / detachment machine which is detachably attached to a forklift and can be used for various operations by gripping a load.

[0002]

2. Description of the Related Art Conventionally, when arranging construction materials such as shaped steel, panels, concrete formwork, etc. in a material storage area or arranging them at an installation position at a construction site, they are lifted using a crane and manually operated by a worker. While doing auxiliary work with
We often arrange baggage. On the other hand, at a physical distribution site, forklifts are generally used for carrying luggage, but the operation of the forklift is limited to a simple work of scooping up and carrying luggage loaded on a pallet from below.

[0003]

However, when a crane is used, the workability is very poor, such as preparing for slinging to a predetermined posture and requiring the assistance of an operator. For this reason, a work vehicle capable of transporting panels and concrete forms is desired, but if such a dedicated work vehicle is manufactured, it becomes very expensive. Therefore, if the frequency of use is low, it is uneconomical and the storage place is troubled.

Accordingly, the applicant has already filed an application for a forklift attaching / detaching work machine which is detachably attached to a forklift and is suitable for transporting panels, concrete forms, and the like (see Japanese Utility Model Application No. 3-112630). . The work machine of the prior application can grip a load of various shapes by driving a pair of clamp pieces by a link device such as a pantograph.

However, in the working machine of the prior application, since the clamp piece is operated by the pantograph, it is difficult to grasp (predict) where the open clamp piece moves when gripping the load, and therefore, Operation is difficult,
In addition, there is a disadvantage that skill is required. Also, since the pair of clamp pieces move toward the center of the clamp,
The clamp position is the center of the clamp. Therefore, even in the case of heavy luggage, the luggage is gripped at the center of the clamp tool away from the vehicle body, so that the center of gravity of the entire forklift that lifts the luggage is closer to the front. Therefore, heavy luggage cannot be lifted, or
Due to the instability, it is not possible to quickly perform operations such as turning while the luggage is lifted.

[0006] The purpose of this invention is to be able to grasp even luggage that is not stacked on a pallet, such as construction materials, etc., to easily operate the luggage, and to carry relatively heavy luggage.
Moreover, it is an object of the present invention to provide a forklift attachment / detachment machine that can use a forklift that can be used anywhere in a factory or a logistics site as a vehicle.

[0007]

SUMMARY OF THE INVENTION A forklift attachment / detachment work machine of the present invention is a work machine detachably mounted on a lifting frame driven up and down along a mast, and has the following components. . That is, the hitch mounting plate
A working machine body to be attached taken through an arm projecting from the front of the machine body, Ru der that a mounted clamp fixture to the tip of the arm. The hitch taking
The attachment plate is attached to and detached from the fork attachment bar provided on the lifting frame.
It is freely mounted and slides along this fork mounting bar.
That can be moved laterally by the
And a stopper pin insertion piece at the top and bottom. The work machine body is
An engaging pin that engages with the hitch and a locking pin
And a mounting plate joined by the The arm is a work machine book
Around the center axis of the arm by a swivel drive mounted on the body
Can be turned. Clamp device includes a fixed clamping piece fixed to the vehicle body side of the clamping device main body extending downwardly from the clamping device body, provided on a front portion of the clamping device body and facing said fixed clamp piece and clamp you Yes <br/> a movable clamp piece is driven in the longitudinal direction to slide the tool body. The clamp body includes a neck attached to an arm.
Swing back and forth with swing drive device .

[0008]

According to the working machine having this configuration, the clamp is lowered so that the fixed clamp piece fixed to the clamp body is slightly away from the front of the load, and then the movable clamp is moved toward the fixed clamp. The luggage is grasped by being moved. Therefore, the position at which the baggage is to be gripped can be easily predicted, and the baggage can be gripped at a position close to the vehicle body. If the work machine is not needed, remove it from the forklift and use the forklift for other work.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 4, the forklift attaching / detaching working machine has a working machine 4 detachably mounted on a lifting frame 3 of a mast 2 of a forklift 1.
In this example, in this example, the mast 2 is telescopically expanded and contracted by the expansion and contraction of the mast lifting cylinder 5, and the lifting frame 3 is driven up and down, and the tilt angle of the mast 2 is changed by the mast tilt cylinder 6. Use what is possible.

As shown in FIGS. 1 to 3, the working machine 4 has an arm 8 protruding from the front surface of the working machine body 7 and a clamp 9 provided at the tip of the arm 8. Arm 8
Is a base end arm 8a and a distal end arm 8b formed of a square pipe, which are telescopically fitted. The base end arm 8a is rotatably fitted to and supported by the support cylinder 10 of the working machine body 7. The entire work machine 4 can be turned in the direction of arrow A1 as shown in the front view of FIG. A swing drive device for the arm 8 includes a rack 12 that meshes with a pinion 11 provided on the outer periphery of the arm 8 in FIG. 1, and an arm swing cylinder 13 that is attached to the work implement body 7 and moves the rack 12 forward and backward.
It is composed of The telescopic drive device of the arm 8 comprises an arm telescopic cylinder 14, the cylinder body of which is connected to the base end arm 8a by a bracket 15, and the piston rod is connected to the distal end arm 8b by a bracket 16.

The clamp 9 is formed by mounting a fixed clamp piece 18A and a movable clamp piece 18B facing each other on a mountain-shaped clamp body 17. The clamp body 17 is supported by a bracket 20 at the tip of the arm 8. Shaft 21
It is attached so as to swing freely in the direction of arrow B1 around.
The swing driving device of the clamp tool 9 includes a swing cylinder 23 provided between the bracket 22 of the arm 8 and the clamp tool body 17.

The lower part of the clamp body 17 is shown in FIG.
As shown in (A), a pair of fixing grooves 17a and guide grooves 17b are provided with the channel members back to back. An L-shaped fixing clamp piece 18A extending downward from the clamp body 17 of FIG. 1 is fixed to the fixing groove 17a by a bolt 18a. The fixed clamp piece 18A is positioned at a position P close to the vehicle body of the clamp body 17 with respect to the fixing groove 17a.
1 and a pair of mounting holes 17c in the fixing groove 17a so that the fixing groove 17a can be fixed at a position P2 near the center indicated by a two-dot chain line.
Are provided in two sets. As shown in FIG. 4, the fixed clamp piece 18A has an upper mounting portion 18b divided into two forks and fixed to the fixing groove 17a.

A movable clamp piece 18B is provided at the front of the clamp body 17, and the movable clamp piece 18B faces the fixed clamp piece 18A. FIG.
The guide roller 18c of the movable clamp piece 18B is fitted in the guide groove 17b of (A). Guide roller 18c
3B, the mounting portion 18e of the movable clamp 18B shown in FIG. 3B and the mounting portion 18e are rotatably supported.
In addition, a connecting piece 18f fastened to the support shaft 18d is fixed. The connecting piece 18f is fixed to the movable clamp piece 18B by bolts 18g in addition to the support shaft 18d. The movable clamp piece 18B is connected to the guide roller 18c (FIG. 3).
(A)) is slidably attached to the guide groove 17b via the support shaft 18d and the connecting piece 18f, and is slidably driven in the front-rear direction by the expansion and contraction of the clamp piece opening / closing cylinder 25. Arrow C from the open position of the solid line.
It can be opened and closed in the direction indicated by. The connecting piece 1
8f is a clamp piece 18B that can be fixed to the mounting portion 18e at a first position P3 projecting obliquely forward and a second position P4 projecting obliquely backward as indicated by a two-dot chain line. Has two mounting holes 18h. Note that the base end of the clamp piece opening / closing cylinder 25 is rotatably supported on the clamp body 17 by a support shaft 26. In each of the clamp pieces 18A and 18B, a lower end piece 18k is detachably fixed to a base 18j by a pin 18i.

The work machine body 7 is mounted on the upper and lower fork mounting bars 28 provided on the lifting frame 3 of FIG.
9 and with a hitch mounting plate 29,
The lateral movement is possible by the two slide cylinders 30 in the slide drive device 42. The hitch mounting plate 29
It has a hitch 31 and a retaining pin insertion piece 32 at the top and bottom, and two of them are mounted on the fork mounting bar 28 instead of a fork (not shown). The work machine body 7 has four mounting plates 33 facing each other as shown in FIG.
Engagement pin 3 provided on the upper portion between facing mounting plates 33, 33
4 is engaged with the hitch 31 of FIG. 6A, and the stop pin 37 of FIG. 7 is inserted through the pin insertion hole 35 provided in the mounting plate 33 and the pin insertion hole 36 of the stop pin insertion piece 32. Thereby, it is detachably attached to the lifting frame 3 (FIG. 1).

Each hitch mounting plate 29 in FIG. 6A is slidably supported by upper and lower fork mounting bars 28 in FIG. 1 by guide pieces 29a provided at the upper and lower ends. By the fork mounting bar 28
The lateral movement is performed along. Each slide cylinder 30
The cylinder body is fixed to two cylinder mounting plates 38 fixed to the fork mounting bar 28 as shown in FIG.
The tip of the piston rod is connected to a hitch mounting plate 29 via a bracket 39. The cylinder mounting plate 38
It is fixed to the fork mounting bar 28 by bolts 40 so that the mounting position can be changed and the mounting position can be removed. The two slide cylinders 30 are driven in such a manner that their expansion and contraction are opposite to each other in synchronization.

Next, the hydraulic system having the above configuration will be described. As shown in FIG. 8, a pipe reel 41 is attached to the mast 2, and a hydraulic hose 50 wound around the pipe reel 41.
Are detachably connected to a coupling 51 provided in the working machine 4. The pipe reel 41 is rotationally urged by a spring member (not shown) in the winding direction, and the hydraulic hose 50 is fed and wound as the working machine 4 moves up and down. The electric wiring (not shown) for driving each electromagnetic valve provided in the work machine 4 is wound around the piping reel 41 together with the hydraulic hose 50. Hydraulic hose 50 of piping reel 41
Is connected to a hydraulic pressure source in the main body of the forklift 1 via switching valves C3 and C4 installed on the frame of the forklift 1 at a position P near the lower end of the mast 2.

FIG. 9 shows a hydraulic circuit, in which a portion surrounded by a chain line is a circuit portion in the body of the forklift 1 and the rest is a circuit portion provided in the work machine 4. The pressure oil supplied from the hydraulic tank 44 in the body of the forklift 1 by the hydraulic pump 43 is supplied to the switching valves C1, C2 which are sequentially connected in series.
Is supplied to the mast elevating cylinder 5 and the mast tilt cylinder 6 via hydraulic paths 45 and 46. The switching valves C3 and C2 are connected in series at the subsequent stage of the switching valves C1 and C2.
4 are provided, and two hydraulic paths 47 and 48 are provided from these switching valves C3 and C4 to the work implement 4. Each of the switching valves C1 to C4 is composed of an electromagnetic valve having three ports and three positions. The switching valves C1 to C4 are capable of switching the hydraulic paths 45 to 48 and switching the flow direction.

From one hydraulic path 47 drawn out to the working machine 4 side, a switching valve D is connected to a clamp piece opening / closing cylinder 25 and a clamp tool swing cylinder 23 so as to be switchable. The other hydraulic path 48 is switchably connected to the slide cylinder 30 and the subsequent hydraulic path 49 via a switching valve A, and further connected to the subsequent hydraulic path 49.
Arm extending cylinder 14 and arm turning cylinder 13
And are switchably connected to. Each switching valve A, B, D
Are each composed of a 4-port, 2-position solenoid valve. Each of the switching valves A, B, C1 to C4, and D is provided with one or a plurality of operators 52 (FIG.
By the operation of FIG. 8), an excitation signal is given via a microcomputer or the like.

The operation of the above configuration will be described. As shown in FIG. 3B, when gripping the load W, first, the entire clamp tool 9 is lowered so that the fixed clamp piece 18A fixed to the clamp tool body 17 is slightly in front of the load W. Then
The load W is gripped by contracting the clamp piece opening / closing cylinder 25 and closing the movable clamp piece 18B toward the fixed clamp piece 18A. Thus, in this working machine 4, the movable clamp piece 18B is
Since the baggage W is gripped by moving in parallel along 7, the position where the baggage W is gripped can be easily predicted, so that the operation is easy and skill is not required.

Further, since the fixed clamp 18A is fixed to the vehicle body side in the clamp body 17, when the baggage W is gripped, the baggage W is located at a position close to the vehicle body side. Therefore, the center of gravity of the entire forklift that lifts the load shown in FIG. Therefore, it is possible to lift the heavy load W as compared with the work machine that grips the load at the center of the clamp 9, and to quickly perform operations such as turning while the load W is lifted.

In this embodiment, the clamp 9 of the working machine 4 attached to the lifting frame 3 can freely rotate, expand and contract the arm 8 and move the working machine body 7 in various postures. Can be changed, and the front / rear position and the left / right position can be changed. In addition, the vertical position of the clamp 9 can be changed by raising and lowering the lifting frame 3. Therefore, the position and the position of the clamp 9 are freely changed so as to easily grasp the luggage placed in various places in various postures according to the shape of the luggage. Can be transported or replaced by freely changing the gripping posture of the user. For this reason, various operations can be efficiently performed by the work machine 4. Although the forklift 1 itself cannot be moved laterally, the work machine 4 can be moved laterally by the slide drive device 42 shown in FIG. .

Further, in this embodiment, as shown in FIG.
The fixed clamp piece 18A can be fixed to the clamp body 17 at a position P1 near the vehicle body and at a position P2 near the center,
Further, the movable clamp piece 18B can be attached to the clamp body 17 by changing its position back and forth as shown by the solid line and the two-dot chain line in FIG. Therefore, as described below, it is possible to carry various packages having different widths Wi.

As shown in FIG. 10A, normally, the fixed clamp 18A is fixed at the position P1 close to the vehicle body, while the connecting piece 18f is attached to the first position P3, and
8B is attached near the center of the clamp 9. in this case,
The baggage W having a normal width Wi can be gripped and carried. If the width Wi of the luggage W is large, the connecting piece 1
By replacing 8f with the second position P4 as shown in FIG. 10B, the luggage W can be gripped and transported. When the width Wi of the load W is small, the fixed clamp piece 18A of FIG. 10A is replaced with a position P2 near the center of the clamp 9 as shown in FIG. Can be transported.

In the case of this embodiment, each clamp piece 1
8A and 18B, since the lower end piece 18k is detachably fixed to the base 18j by the pin 18i in FIG. 1, the lower end piece 18k can be removed to easily hold the low-profile luggage W, The relatively high luggage W can be easily gripped by attaching the piece 18k.

When the work machine 4 is unnecessary, the work machine 4 shown in FIG. 1 is removed from the hitch 31 of the lifting frame 3. Thus, a different type of working machine, for example, a working machine having a back fork or a cargo scooping bucket, can be attached to the hitch 31 and the forklift 1 can be used for another purpose. In addition, since the work machine 4 is attached and detached by the hitch 31, attachment and detachment can be easily performed. When a fork (not shown) is mounted on the forklift 1, the hitch mounting plate 29 is removed from the lifting frame 3, and the fork is mounted on the fork mounting bar 28.

In the working machine 4 of this embodiment, each cylinder device of the working machine 4 is driven by using a hydraulic system provided in the forklift 1.
It is not necessary to provide a dedicated hydraulic system, and the hydraulic system is simplified.

In the above-described embodiment, the hydraulic cylinder is used for the drive unit of each part of the work machine 4, but a hydraulic motor, an electric motor or the like may be used. In the above embodiment, the slide drive unit 42 is moved laterally together with the hitch mounting plate 29. However, the work machine body 7 is composed of a part that cannot be moved laterally and a part that can be moved laterally attached to this part. You may.

[0028]

According to the present invention, a forklift attaching / detaching work machine includes a fixed clamp piece extending downward from a clamp tool body, and a movable clamp which faces the fixed clamp piece and is driven in the front-rear direction by sliding on the clamp tool body. Since a piece is provided and the movable clamp piece is slid, the load is gripped, so that the position where the load is gripped can be easily grasped, so that the operation of the work machine becomes easy and skill is not required. In addition, since the fixed clamp piece is fixed to the body side of the clamp device, when gripping the load, the center of gravity of the entire forklift including the load does not move to the front of the vehicle body, so that heavy load can be lifted. In addition, since the working machine is detachable from the forklift, by removing it when not needed, the forklift can be used for other purposes, and the storage space for the working machine is small.

[Brief description of the drawings]

FIG. 1 is a side view showing a working machine according to an embodiment of the present invention.

FIGS. 2A and 2B are a plan view and a rear view showing a main body and an arm portion of the working machine, respectively.

FIG. 3A is a front view of a clamp, and FIG.
It is sectional drawing of (A).

FIG. 4 is a perspective view showing a state in which the working machine is attached to a forklift.

FIGS. 5A and 5B are a cutaway side view and a rear view, respectively, showing a structure for attaching a working machine to a lifting frame.

FIGS. 6A and 6B are a side view and a rear view of a hitch mounting plate.

FIG. 7 is a perspective view of a mounting plate portion of the working machine body.

FIG. 8 is an explanatory view of the arrangement of hydraulic equipment.

FIG. 9 is a hydraulic circuit diagram.

FIG. 10 is an explanatory diagram of a usage example of a work machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Forklift, 2 ... Mast, 3 ... Lifting frame, 4 ... Working machine, 7 ... Working machine main body, 8 ... Arm, 9 ... Clamping tool,
17: Clamp body, 18A: Fixed clamp piece, 18
B: movable clamp piece

Claims (1)

(57) [Scope of request for utility model registration] To 1. A lifting frame which is driven to be raised or lowered along the mast of the forklift, and the working machine body mounted detachably wear through the hitch mounting plate, and an arm protruding from the front of the machine body, this e Bei a clamping device attached to the distal end of the arm, the hitch mounting plate, set to the lifting frame
Attached to the fork mounting bar
Can be moved laterally with a slide drive along the fork mounting bar
Make sure that the hitch and the pin
The work machine body has an engagement pin that engages with the hitch.
And a mounting plate to be connected to the pin insertion piece with a locking pin.
And the arm is a swing drive attached to the work machine body.
Device by a pivotable arm center axis, before Symbol clamp fixture, a fixed clamp piece fixed to the vehicle body side of the clamping device main body extending downwardly from the clamping device main body, provided at the front of the clamp fixture body is the facing to the fixed clamp piece, and have a movable clamp piece is driven in the longitudinal direction to slide the clamp member body, said Kuranpugu present
The body is swung back and forth with a swing drive attached to the arm.
A swingable forklift attachment / detachment machine.