JPH0455133A - Cargo handling device - Google Patents

Abstract

PURPOSE:To control a lift platform to stop at an optional position beyond a load-carrying platform by providing a lift control means for operation- controlling a lift and an automatic positioning control means so that lift operation is conducted beyond the load-carrying platform and stopping is performed at an optional position. CONSTITUTION:A lift control means C1 is so constituted as to lift-control a lift platform Fe along guide columns 2, 2 by means of up-down switching control of a lift switch SW2. An automatic positioning control means C2 is so constituted as to stop the lift platform Fe automatically when the platform Fe, during ascending or descending, becomes flush with a load-carrying platform A, by means of up-down switching control of a housing switch SW3. A sliding movement control means C3 controls a sliding reciprocating movement of a sliding platform Ds between the load-carrying platform A and the lift platform Fe by means of contraction switching control of a sliding platform operation switch SW 1.

Description

Detailed Description of the Invention A1 Objective of the Invention (1) Industrial Application Field The present invention is provided with a loading platform and a lifting platform, and is capable of loading and unloading cargo onto and from the loading platform by controlling the elevation of the lifting platform. This relates to a cargo handling device that can be lowered and lowered.

(2) Conventional technology A lifting platform that is raised and lowered by a lifting mechanism is provided on one side of the loading platform, and by controlling the lifting and lowering operation of the lifting platform, cargo can be loaded onto and unloaded from the loading platform. A cargo handling device designed to carry out
(See Publication No. 34).

(3) Problems to be solved by the invention However, in such a cargo handling device, when transferring a load between the loading platform and the lifting platform during cargo handling work, the receiving surface of the loading platform and the top surface of the lifting platform are flush with each other. It is necessary to align the two so that the two positions are aligned, but in the conventional system, such alignment work has to be done manually by the worker, which is not only cumbersome but also difficult. There is a problem in that it is difficult to accurately align them and causes a decrease in cargo handling efficiency.

Another problem with the conventional type is that cargo cannot be loaded or unloaded between the platform or the like located at a higher level than the loading platform.

The present invention solves the above problems by automatically controlling the position of the lifting platform and loading platform so that they are flush with each other at any time during cargo handling work, and by controlling the lifting platform to stop at any position beyond the loading platform. The purpose of the present invention is to provide a new cargo handling device that has the following features.

B1 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a loading platform, a lifting platform provided on one side of the loading platform so as to be movable up and down, and a lifting platform capable of raising and lowering the lifting platform. an elevating mechanism that controls the elevating mechanism, an elevating control means that controls the elevating mechanism so that the elevating platform can move up and down beyond the loading platform and stop at any position; It is comprised of automatic positioning control means that can stop the lifting platform at any time when it is flush with the cargo receiving surface.

Loads may be transferred directly between the loading platform and the lifting platform, or cargo may be transferred via a slide platform that is movable back and forth between them.

(2) Effect According to the above configuration, if the automatic positioning control means attached to the lifting/lowering control means of the lifting platform is activated, the lifting platform that is in the process of lifting/lowering will automatically stop when it becomes flush with the loading platform. Therefore, cargo can be transferred smoothly and quickly from the loading platform to the lifting platform, or from the lifting platform to the loading platform, and cargo handling efficiency is greatly improved.

It is also possible to load and unload cargo between the loading platform and the above-mentioned platforms.

(3) Examples An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front side view of a cargo handling vehicle (2) equipped with the cargo handling device of the present invention, and FIG. 2 is a plan view thereof. In these figures,
A cargo platform A is formed at the rear of the vehicle body B of the cargo handling vehicle, which is generally designated by the symbol V. On the cargo receiving surface of the cargo platform A, a pair of guide rails 1, which are parallel to each other and spaced apart from each other in the vehicle width direction, are formed. 1 are laid along the vehicle length direction, and a pair of parallel guide columns 2 and 2 are installed at the left and right corners of the rear end of the loading platform A.
are installed vertically, and these guide columns 2.
2 guides the lifting and lowering of the lifting platform Fe, which will be described later.

Furthermore, on the vehicle body B, a slide cylinder 3 serving as a reciprocating and driving device is arranged in the longitudinal direction at the center in the vehicle width direction, and the slide cylinder 3 is supported by the vehicle body B, and its tip is integrally provided with a connecting member 4 in the form of a two-pronged hook, and this connecting member 4 penetrates the stepped upright wall A1 at the front end of the loading platform A when the sliding platform cylinder 3 is extended. It is designed so that it can protrude above A (Fig. 8).

A substantially vertical guide path 5.5 is formed in the pair of guide columns 2.2, and a guide roller 7 is provided therein with a pair of elevating members 6.6 in each guide path 5.5.
．． 8 so that it can be raised and lowered freely. At the bottom of the pair of elevating members 6.6, both base ends of the elevating table Fe move between the extended position (solid line position in Figure 1) and the retracted position (dotted line position in Figure 1) with support shafts 9,9. It is pivoted so that it can rotate up and down.

The elevating platform Fe is formed of a rectangular frame with a rearwardly open recess 10 at the center of its rear edge, and on both left and right sides thereof there is a cross-sectional frame that coincides with the guide rail 1.1 in the longitudinal direction. A pair of letter-shaped guide rails 11.11 are laid together.

Furthermore, a pair of stoppers 12.1 are provided at the rear end of the lifting platform Fe.
2 are provided to protrude upward, and these stoppers 12.
12 is an abutment piece 72.7 provided on the slide table Ds, which will be described later.
2 (Fig. 5.6), so that the retracted position of the slide stand Ds can be regulated. Further, a pair of locked parts 13.13 are integrally provided on the inner surface of the recessed part 10,
These locked parts 13.13 are slide bases Ds which will be described later.
can be engaged with a lashing hook 70 (FIGS. 5 and 6).

Retaining pieces 14.14 are integrally protruded from both base ends of the elevating table Fe, and these retaining pieces 14.14 are connected to a position-adjustable locking member 15.14 provided at the lower end of the elevating member 6. 15, the lifting platform Fe is held in a substantially horizontal extended position. Further, locking pins 19.19 are provided protrudingly on both sides of the tip of the lifting platform Fe, and these locking pins 19.19 are connected to the guide columns 2, 2.
The lifting platform Fe is held in the upright and retracted position by engaging with the locking pieces 23, 23 which are rotatably provided.

The elevating platform Fe is controlled to move up and down along the pair of guide columns 2.2 by an elevating mechanism E provided on the vehicle body B. Next, the structure of the elevating mechanism E will be explained mainly with reference to FIG.
．． 17' is supported. The base ends of two wire ropes 1B and 1B' are tied to the car body B on both sides of the lifting cylinder 16, and one of the wire ropes 18 has one movable pulley 17 and a fixed pulley pivotally supported by the car body B. 20, 21
, and a fixed pulley 2 pivotally supported on the upper part of one guide column 2.
2 and then tied to one lifting member 6,
Also, the other wire rope 18' is connected to the other movable pulley 17',
After passing through a fixed pulley 24 pivotally supported by the vehicle body B and a fixed pulley 25 pivotally supported on the upper part of the other guide column 2, it is connected to the other lifting member 6. Therefore, if the single-acting lifting cylinder 6 is telescopically operated, two wire ropes 1B
,! 8' to the lifting platform Fe through a pair of guide columns 2.2
can be ascended and descended along the

Note that if the lifting cylinder 6 is made free, the lifting platform Fe will be lowered by its own weight.

On the cargo receiving surface of the cargo platform A, a slide platform Ds that can be transferred onto the lifting platform Fe is provided so as to be movable back and forth.

As shown in FIG. 8, this slide stand Ds is constructed by integrally laying a cargo receiving plate 3o made of an iron plate or the like on a rectangular underframe 29. The underframe 29 has a plurality of cross members 28 and 27 on the left and right longitudinal girders 27, 27, as shown in Fig. 3.5.
・are combined into a highly rigid rectangular frame. A rear end portion of the cargo receiving plate 3o is formed into an inclined surface 31 that slopes downward toward the rear.

As shown in FIG. 8, a pair of left and right holding frames 32.32 are provided on the left and right sides of the cargo receiving plate 30 along the front-rear direction, and a pair of aircraft, which are cargo objects, are mounted on these holding frames 32.32. The tires T, T (FIGS. 1 and 2) are held tightly by cables 33, 33.

Guide frames 35.35 made of angle material are fixed to the left and right sides of the underframe 29 of the slide table Ds, respectively, and these guide frames 35.35 have a plurality of lateral regulating rollers 36... and vertical regulating rollers. 37... are rotatably supported, respectively, and these rollers 36... and 37... are movably engaged with the guide rail 1.1 on the loading platform A to guide the back and forth movement of the slide platform Ds. .

As clearly shown in Figure 3.5, the underframe 2 of the slide stand Ds
A planar U-shaped receiving portion 38 that opens at the front edge is formed at the center of the front end of the slider 9, and the three-pronged hook-shaped connecting member 4 at the tip of the slide cylinder 3 can enter into this receiving portion 38. An abutting surface 381 capable of abutting against the distal end surface 41 of the connecting member 4 is formed on the inner surface of the receiving portion 38 .

The slide base Ds includes a connecting link mechanism 39 that cooperates with the connecting member 4 at the tip of the slide base cylinder 3 to constitute a connecting device J for connecting the slide base Ds and the slide base cylinder 3, and A lashing link mechanism 40 that cooperates with the stopper 12 and the locked portion 13 and constitutes a lashing device for lashing the slide platform Ds on the elevating platform Fe is provided.

Next, the configurations of the connecting link mechanism 39 and the securing link mechanism 40 will be explained with reference to FIGS. 3 to 10.

First, to explain the configuration of the connecting link mechanism 39, as shown in FIGS. 3 to 6 and 10, the rear part of the underframe 29 of the slide base Ds has an operation section extending laterally through a plurality of bearing bosses 41 and 41. A lever 42 is rotatably supported, and one end of the operating lever 42 is bent at a substantially right angle to form a manual lever 43. In the center of the operating lever 42,
An arm body 44 is welded, and one end of a length-adjustable connecting rod 45 is connected to the tip of the arm body 44. This connecting rod 45 extends forward on the slide base Ds and is connected to a swing lever 46. The swinging lever 46 has an intermediate portion pivotally supported by a bracket 47 protruding from the cross member 28 at the front of the slide table Ds with a pivot 48.
A connecting rod 49 is connected to one end of the swing lever 46. The front part of this connecting rod 49 extends downward within the receiving part 38, and the front end thereof has an arm body 51 integral with a connecting shaft 50 rotatably supported in the center part of the receiving part 38. connected. A connector 52 is fixed to the connecting shaft 50, and this connector 52 can be placed in the connecting position (a) shown in FIG. 3 and in the disconnecting position (b) shown in FIG. 5 within the three-pronged hook-shaped connecting member 4. It can be rotated approximately 90 degrees between the two. When the manual lever 43 is in the prone position as shown in FIG. 3-4 and the operating lever 42 is rotated clockwise in FIG. The connector 52 is moved to the lock position (A) perpendicular to the traveling direction of the vehicle V via the swinging lever 46 and the connecting rod 49.
is maintained. Further, when the manual lever 43 is raised as shown in Fig. 5.6 and the operating lever 42 is raised and rotated as shown in Fig. 6, the connecting rod 45 is moved forward (as indicated by the arrow (χ' in Fig. 5) direction), the swinging lever 46 and the connecting rod 4
9, the connector 52 is rotatably held at an unlocked position (b) substantially parallel to the traveling direction of the vehicle V.

The connection link mechanism 39 is provided with a connection release holding mechanism 54 for holding it in the connection release position.

Next, the structure of this mechanism 54 will be explained with reference to FIGS. 3 to 7 and 10. A lock pin 55 is provided protruding from the free end of the swing lever 46. As shown in FIG.

On the other hand, a lock arm 56 is pivotally supported 57 on the cross member 28 of the slide base Ds in the vicinity of the free end of the swing lever 46, and the lock arm 56 has the lock pin 55 Notch 5 that can be engaged and disengaged with
8 is formed. The lock arm 56 is engaged with the other end of a tension spring 59, one end of which is locked on the slide base Ds, and the elastic force of the tension spring 59 is applied to the connector as shown in FIG. 52 is in the connection release position (b) and the connection member 4 of the slide cylinder 3 has deviated from the receiving part 38, the notch 58 is urged to the position where it engages with the lock pin 55 and the connection is completed. Device J may be held in the uncoupled position. One end of a bell crank 62 is connected to the free end of the lock arm 56 via a link 60, and is rotatably supported 61 on the receiving portion 38 of the slide base Ds.
A roller 63 is rotatably supported at the free end of the bell crank 62. As shown in FIG. 3.5, this roller 63 is located at a position where it can engage with the side surface of the slide table cylinder 3 when it extends and the connecting member 4 at its tip enters into the receiving portion 38 of the slide table Ds. This causes the bell crank 62 to rotate counterclockwise, and the lock arm 5
6 is held in the unlocked position against the spring force of the tension spring 59, as shown in FIGS.

Next, the structure of the lashing link mechanism 40 of the lashing device for lashing the slide platform DS onto the lifting platform Fe will be explained with reference to FIGS. 3 to 6.10. A pair of arms 65 on the left and right sides of the connecting rod 45.
65 are fixed, and length-adjustable lashing rods 66.66 are pivotally connected to these arms 65.65, and these lashing rods 66.66 extend forward, and the other ends are respectively connected to the slide bases Ds. A lashing shaft 6B rotatably supported on the cross member 28 of the
68 and is pivotally connected to an integral arm 69.69. A pair of downward lashing hooks 70.70 is fixed to each of the lashing shafts 68, 68, and these lashing hooks 70.7
0 can be detachably attached to the locked portions 13 and 13 of the lifting platform Fe, respectively. Therefore, when the manual lever 43 integrated with the operating lever 42 is in the upright position as shown in FIG. 1.5.10, the lashing hook 70.70
rotates clockwise, and the locked part 13.13 of the lifting platform Fe
in the engaged position. Therefore, depending on the upright position of the manual lever 43, it can be easily visually confirmed from the outside that the slide table Ds is secured to the lifting table Fe.

An abutment piece 72 is fixed to the back surface of the inclined surface 31 of the slide table Ds, and this abutment piece 72 is lifted and lowered when the slide table Ds is transferred onto the elevating table Fe as shown in FIGS. 5 and 6. Platform F
By engaging with a stopper 12 fixed to the rear part of the slide table Ds, the rear position of the slide table Ds can be regulated.

FIG. 11 shows a hydraulic circuit diagram C of the slide table cylinder 3 for moving the slide table Ds and the lifting cylinder 16 for lifting and lowering the lifting table Fe. In this circuit diagram C, the oil chamber a of the slide cylinder 3.

The oil passages 74 and 75 connected to b are connected to a hydraulic pump 77 driven by a motor M via an electromagnetic switching valve 76, or an oil reservoir 78.
An oil passage 79 connected to the oil chamber C of the lifting cylinder 16 is also connected to a hydraulic pump 77 or an oil reservoir 78 via an electromagnetic directional control valve 81 and an electromagnetic switching valve 80.

In FIG. 11, 82 to 85 are relief valves, and 86 is an orifice.

In FIG. 11, solenoid SoI! , e switches the electromagnetic switching valve 76 to the right position, the slide cylinder 3 is extended, and the solenoid 5 of
When switched to the left position by excitation of fif, the slide cylinder 3 is contracted.

Also, leave the solenoid directional control valve 81 in the left position, and leave the solenoid directional control valve 81 in the left position.
0 to the left position by excitation of the solenoid 5oj2b, the lifting cylinder 16 is extended and the solenoid 5
The electromagnetic directional control valve 81 is moved to the right position by excitation of oj2c,
When the electromagnetic switching valve 80 is switched to the right position by excitation of the solenoid 5offia, the pressure oil in the oil chamber C is returned to the oil reservoir 78 via the orifice 86, and the lifting cylinder 16 is moved to the lifting platform Fe.
And it is slowly contracted by the weight of the elevating member 6.

FIG. 12 shows the elevating and lowering control of the elevating table Fe and the sliding table D.
The arrangement of limit switches LSI to LS5 provided on the cargo handling vehicle (2) to control the movement of the cargo handling vehicle (2) is shown. The limit switch LS2 is operated when the elevator platform Fe is raised and retracted, and constitutes a storage position detection means for the elevator platform Fe.The limit switch LS2 is located at the center of the rear edge of the vehicle body
is operated when it is horizontally extended and is flush with the loading platform A, and constitutes an extended position detection means for the lifting platform Fe. Also limit switch LS3. LS4 are arranged in parallel on the loading platform A, the limit switch LS3 is operated by the lower surface of the connecting member 4 at the tip of the slide cylinder 3, and constitutes a backward position detection means for the connecting member 4, and the limit switch LS4 is It is operated by a dog cam 26 formed on the lower surface of the stand Ds, and constitutes intermediate position detection means for the slide stand Ds.

Further, the limit switch LS5 is provided at the front of the loading platform A, and is operated by the front of the slide platform Ds to constitute storage position detection means for the slide platform Ds.

FIG. 13 is an electric circuit diagram of this embodiment, in which the circuit includes a lift control means C1 having a lift switch SW2 and an automatic positioning control means C2 having a storage switch SW3, which control the rise and fall of the lift table Fe; It has a slide movement control means C3 for the slide table Ds having a slide table operation switch SWI. The elevation control means C1 is configured to control the elevation of the elevating platform Fe along the guide columns 2, 2 by vertical switching control of the elevation switch SW2, as will be described in detail later, and the automatic positioning control means C2 As will be detailed later, the up/down switching control I of the storage switch SW3
The structure is such that the lifting platform Fe, which is being raised or lowered by I, can be automatically stopped when it becomes flush with the loading platform A, and further includes a slide movement control means C3.
controls the sliding reciprocation of the slide platform Ds between the loading platform A and the elevating platform Fe by controlling the expansion/contraction switching of the slide platform operating switch SWI.

Fig. 14 is a flowchart showing the operation sequence of this embodiment, and Figs. 15 to 17 are cargo handling vehicles showing the operation of this embodiment.
FIG.

Next, the operation of this embodiment will be explained with reference to FIGS. 11 to 17.

(2) In FIG. 15(1), the empty slide platform Ds is fixedly supported by the cargo platform A''2, and the elevator platform Fc is held in the storage position. In this state, the cargo handling vehicle V is in a normal running state.

In this state, the slide platform Ds is stored on the loading platform A, the manual lever 43 is laid down and the lashing device is in the released state, while the coupling device J is in the coupled state,
The connecting member 4 at the tip of the slide cylinder 3 in the contracted state is connected to the connector 52 of the connecting link mechanism 39. The front surface of the slide Ds abuts against the stepped upright wall A1 of the vehicle body B, and the inner surfaces of the pair of claws 42, 42 of the connecting member 4 abut against one side of the connector 52, and The slide base Ds is firmly fixed at a predetermined position on the vehicle body B by the collision. In this connected state, the roller 63 at the tip of the bell crank 62 is engaged with one side of the connecting member 4, so the connection release holding mechanism 54 is in an inactive state.

On the other hand, the elevating table Fe is raised by the extension operation of the elevating cylinder 16 and is held in an upright retracted position. And the limit switch LSI is on the [stand up] side and is OFF.
Further, the limit switch LS2 is also located on the "not flush" side of the lifting platform Fe and the loading platform A, and is turned off.

■ To carry out cargo handling work, as shown by the arrow in Figure 15 (2), the lifting platform Fe is tilted down for loading and extended to the unloading position.
The upper surface of the lifting platform Fe is flush with the load receiving surface of the loading platform A. In this state, the limit switch LSI is turned on, that is, "down", and the limit switch LS2 is turned on, that is, switched to the "flush" side. This is the main switch MS
When turned on, the pilot lamp Lp (provided on the driver's cab, etc.) lights up to indicate that the slide stand Ds is ready for operation.

(2) Next, when the slide table operation switch SWI is switched to the upper side, that is, to the "extension" side, the relay RM is energized, the normally open relay switch Rm is closed, the motor M is driven, and the hydraulic pump 77 is started. Solenoid SOI again! , e
is excited, the slide table cylinder 3 is extended as shown in FIG. 15(3), and the slide table Ds is transferred from the loading platform A onto the lifting platform Fe. At this time, as shown in FIGS. 5 and 6, the abutment piece 72 at the rear end of the slide table Ds is
e It collides with the stopper 12 at the rear end and stops, and the retreating position of the slide stand Ds is regulated. Manual lever 43 here
6 and 15 (3) in the R direction, the lashing hook 70.70 rotates downward (Figs. 3 and 4) and locks the locked portion 13.13 of the lifting platform Fe. The slide table Ds is secured onto the lifting table Fe by engaging with the slide table Ds. Also manual lever 43
As the connecting rod 45 is pushed in the direction shown in FIG. The connection state is automatically released (FIGS. 4-5), and the connection state between the slide base Ds and the connecting member 4 of the slide base cylinder 3 is released.

When the slide table Ds is transferred onto the lifting table Fe, the connecting member 4 is separated from the limit switch LS3, so the switch LS3 is turned off, and the limit switch LS4 remains on.

When the slide table operating switch SWI is switched to the lower side, that is, to the "retraction" side, the solenoid 5 off is energized, the electromagnetic switching valve 76 is switched to the left, and the slide table cylinder 3 is retracted. In this case, the connecting member 4 at the tip of the slide cylinder 3 comes off the connector 52 and retreats toward the front of the vehicle V, so the roller 63 at the tip of the bell crank 62 comes off the side of the connecting member 4, thereby causing the connection release holding mechanism. The lock arm 56 of 54 is activated by engaging the lock pin 55, and the coupling device J is securely held in the uncoupled position (FIG. 7).

■ If either the "upper" or "lower" side of the lift switch SW2 is turned ON, the sliding cylinder 3 is in the middle of contraction, and as shown in FIG. 4 turns limit switch LS3 ON, which energizes relay R3 and normally closes relay switch R3.
-1 is turned off and solenoid 5onf is deenergized. Therefore, during the contraction of the slide cylinder 3,
That is, it stops at the position shown in FIG. 15 (4).

By turning on the aforementioned limit switch LS3, the lift control means CI becomes operable by switching control of the lift switch SW2. That is, by connecting the lift switch SW2 to the "upper" side, the relay R3 is energized, and the normally open relay switch R is activated.
3-4 is closed, relay R2 is also energized, so the normally open relay switches R2-1, ..., R3-1 are all closed, solenoid 5offb is energized, and electromagnetic solenoid valve 80 is switched to the left position. The elevating cylinder 16 is extended and the elevating platform Fe can be raised.

Furthermore, when the lift switch SW2 is switched to the "down" side, the normally open relay switches R2-2 and R3-3 are closed, so the solenoids 5ona and 5ofc are energized, and the electromagnetic switching valve 80 and the direction control valve 81 are both placed in the right position. Switch to lift platform F
e can be lowered.

Therefore, as shown in FIG. 15 (4), the slide stand Ds
is completely transferred onto the elevating platform Fe, the connecting member 4 is retreated, and the limit switch LS3 is turned on, the elevating platform Fe is moved to the guide column 2 by the vertical switching connection of the elevating switch SW2 of the elevating control means CI. , 2 can be freely raised and lowered.

Next, referring to FIGS. 16(1) and 16(2), the process of loading the cargo on the platform Pn, that is, the aircraft tires T, onto the loading platform A of the cargo handling vehicle (2) will be described.

■ As mentioned above, the lifting platform Fe is raised so that its upper surface becomes the platform P! as shown in FIG. 16 (1). When it reaches the same level as the top surface of Sof!, turn off the lift switch SW2 and the solenoid 5ova will be activated. , b, and 5oj2c are all de-energized, and the lifting of the elevator platform Fe is stopped. As shown in FIG. 16 (1), the platform Pf! , the upper cargo T is loaded from the chain line to the slide table Ds on the lifting table Fe as shown by the solid line.

■ Next, in order to load the cargo T on the slide platform Ds onto the platform A, connect the storage switch SW3 to the "lower" side.
Relay R5 due to limit switch L S 2 being switched to the upper side, that is, to the side "not flush" with the lifting platform.
When the energization is released, the normally closed relay switch R5-3 is kept in the ON state (the relay switch R2-2 is already ON), and the solenoids 5offia and 5oj2c are both energized, and the solenoid switching valve 80 and the solenoid switch are energized. Both directional control valves 81 are switched to the right side, and the oil chamber a of the lifting cylinder 16 communicates with the oil reservoir 78, so that the tires T are loaded and the slide table Ds is lowered by its own weight together with the lift table Fe.

■ When the lifting platform Fe descends to a level flush with the loading platform A of the vehicle V, the limit switch LS2 is set to the lower side, that is, "
Since it is turned on to the "flush" side, relay R5 is energized, normally closed relay switch R5-3 is turned off, and solenoid 5of
fa and 5ofc are both de-energized, and the electromagnetic switching valve 80 and electromagnetic directional control valve 81 both return to their neutral positions.
The lifting platform Fe stops flush with the loading platform A.

As mentioned above, the automatic positioning control means C2 is operated by the up/down switching side control of the storage switch SW3, and the lifting platform Fe is moved to the loading platform A.
It can be automatically stopped when it is flush with the surface.

■ When the slide base operation switch SWI of the slide movement control means C3 is turned on to the "extension" side with the knee, solenoid 5
afe is energized and the slide base cylinder 3 extends,
The connecting member 4 at its tip enters into the receiving portion 38 of the lifting platform Fe. At this time, limit switch LS3 is turned off. Now, when the manual lever 43 is operated upside down, the connecting link mechanism 29 of the connecting device J is operated as described above, and the device J is in the connected state, that is, the connecting member 4 and the connector 52 are connected, and the device J is slid. The stand cylinder 3 and the slide stand Ds are in a connected state, and in conjunction with this, the connection release holding mechanism 5
4 is in an inoperative state, the lashing device I is in a lashing release state, and the lashing hooks 70 and 70 are in the locked part 13.
．． 13, the slide table Ds and the elevating table Fe become free.

■ If you turn on the slide base operation switch SWI to the lower side, that is, to the "retraction" side, solenoid S will be activated.

I! , f are excited, the electromagnetic switching valve 76 is switched to the left, and the slide cylinder 3 is contracted. This allows the first
As shown in FIG. 6 (2), the slide platform Ds is transferred and stored on the loading platform A, and the cargo thereon, that is, the tires T, is loaded onto the cargo handling vehicle V. In this state, limit switch L
S4 is the limit switch L at the same time that the pressure by the dog cam 26 on the bottom surface of the slide table DS is released and the switch returns to the ON state.
Since S5 is also turned on by slide stand Ds, relay R
2 is energized and the normally open relay switch R2-1 is closed.

(2) When the loading of the tires T onto the cargo handling vehicle V is completed as described above, the lifting platform Fe can be erected and retracted as shown by the arrow in FIG. 16 (2), and the cargo handling vehicle (2) can be driven.

By the way, if the lifting platform Fe shifts downward from a predetermined position due to oil leakage from the lifting cylinder 16 while the cargo handling vehicle is running,
When the lifting platform Fe is extended to the use position, as shown in Fig. 16 (
2) As shown by the chain line, there will be a step between the loading surface of the loading platform A and the upper surface of the lifting platform Fe, but at the retracted position of the sliding platform Ds, the limit switch LS4. L
Since all S5 are in the ON state, the storage switch SW3
When connected to the "up" position, the solenoid 5ofb is energized, the solenoid switching valve 80 is switched to the left position, and the lifting cylinder 16 is switched to the left position.
can be extended to raise the lifting platform Fe until it is flush with the loading platform A.

By the way, due to the operation of the slide movement control means C3,
Assuming that the slide Ds, which was supposed to have been transferred onto the lifting platform Fe, is for some reason straddling between the lifting platform Fe and the loading platform A, if the lifting platform Fe is raised or lowered in this state, the lifting platform, etc. There is a risk of damage to the members of
Press to change this to "When straddling the loading platform and lifting platform"
side, that is, the OFF side. This allows relay R
2 is deenergized and the normally open relay switch R2-1, R
2-2 is solenoid 5oJ to switch both to open state.
b.SoI! .

Next, with reference to FIGS. 17(1) and 17(2), a case will be described in which the cargo T is loaded onto the lifting platform Fe.

(2) When the slide table operation switch SWI is connected to the "retract" side from the state shown in FIG. 17(1), that is, the state where the lifting table Fe is stopped flush with the loading platform A, the slide table cylinder 3 is retracted. During the contraction, the connecting member 4 at the tip closes the limit switch LS3, so the relay R3 is energized and the solenoid 5ojl! a, and 5o
Both j2c are energized. Therefore, the lift switch S
When W2 is connected to the "lower" side, the electromagnetic switching valve 80 and the direction control valve 81 are both switched to the right position, the high pressure chamber of the lifting cylinder 16 is communicated with the oil reservoir 78, and the lifting platform Fe is not slid. Due to their own weight, the cargo T on the platform Ds lands on the ground as shown in FIG. 17(b), and the cargo T can be lowered to the ground as shown from the solid line to the chain line. In this case, the lifting platform Fe is slowly lowered by the action of the orifice 85.

Also, turn off the lift switch SW2 during the descent of the lift platform Fe.
F, the elevator platform Fe can be stopped at any position.

■ After loading and unloading the cargo, set the storage switch SW3 to
When switched to the side, relay R6 is energized and normally open relay switch R6-1 is turned on, solenoid 5onb is energized and the lifting platform Fe rises until it is flush with the receiving surface of the loading platform A. , limit switch LS2 is "flush"
Since the power is turned on to the side, the lifting platform Fe stops at that position.

■ If you switch the slide base operation switch SWI to the "extension" side, the solenoid S will activate as described above.

°Ce is excited and the slide table cylinder 3 can be extended, and by tilting the manual lever 43, the connecting member 4 at the tip of the slide table cylinder is connected to the slide table Ds, and the slide table Ds and the elevating table Fe are connected. release the binding. If the slide table operating switch SWL is now switched to the "retract" side, the slide table cylinder 3 will contract and the slide table Ds can be stored on the loading platform A. Thereafter, the lifting platform Fe can be raised and retracted to put the cargo handling vehicle (2) into a running state.

In addition, in the above embodiment, there is a slot between the loading platform and the lifting platform.

Although the case where the cargo is transferred via the loading platform has been described, the cargo may be transferred directly between the cargo platform and the lifting platform.

Further, in the above embodiment, the case where aircraft tires are loaded and unloaded as a cargo object is explained, but it goes without saying that the present invention can also be applied to loading and unloading other general cargo objects.

Further, in the embodiment described above, a case has been described in which the cargo handling device of the present invention is provided in a cargo handling vehicle, but it may be provided in other devices.

Furthermore, although the above-mentioned elevating device moves the elevating platform up and down along a substantially vertical guide column, other elevating devices such as a link type elevating device may be used instead.

Furthermore, in the above embodiment, a case was explained in which a hydraulic cylinder was used as a reciprocating drive device for the slide table and the lifting table.
Of course, they may be driven by other drive devices.

C0 Effects of the Invention As described above, according to the present invention, when the lifting platform becomes flush with the load receiving surface of the loading platform while the lifting platform is being raised or lowered, the automatic positioning control means can accurately position the lifting platform at that position at any time. Since it can be stopped, the cargo can be transferred smoothly and safely between the loading platform and the lifting platform, and as a result, the efficiency of cargo handling operations can be greatly improved.

Furthermore, it becomes possible to load and unload cargo between a platform located at a higher position than the loading platform and the loading platform, thereby expanding the range of cargo handling operations.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a rear side view of a cargo handling vehicle equipped with the cargo handling device of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a connection between a slide platform and a cargo platform. Fig. 4 is a cross-sectional view taken along line IV-TV in Fig. 3, and Fig. 5 shows the state of connection between the slide table and the lifting table. Fig. 6 is a cross-sectional view taken along line V-V, Fig. 6 is a sectional view taken along line Vl-Vl of Fig. 5,
FIG. 8 is an exploded perspective view of the slide platform and the loading platform of the cargo handling vehicle; FIG. 9 is an exploded perspective view of the lifting platform and the lifting mechanism;
Fig. 10 is an exploded perspective view of the coupling device, lashing device, and decoupling holding mechanism, Fig. 11 is a hydraulic circuit diagram of the slide cylinder and lifting cylinder, and Fig. 12 is the rear part of the cargo handling vehicle showing the arrangement of limit switches. A schematic plan view, FIG. 13 is an electric circuit diagram of this embodiment, FIG. 14 is a flowchart showing the operation of this embodiment, and FIGS. 15 (1) to (4) are a cargo handling vehicle showing the operation of this embodiment. Schematic side view of Figure 16 (1
). 17(2) is a schematic side view of the cargo handling vehicle showing the loading process of this embodiment, and FIGS. 17(1) and 17(2) are schematic side views of the cargo handling vehicle showing the stacking process of this embodiment.

Claims (1)

[Claims] A loading platform (A), a lifting platform (Fe) provided on one side of the loading platform (A) so that it can be raised and lowered, a lifting mechanism (E) that raises and lowers the lifting platform (Fe), and the lifting platform (Fe) a lifting control means (C1) for controlling the operation of the lifting mechanism (E), and a top surface of the lifting platform (Fe) so that the lifting mechanism (E) can be moved up and down beyond the loading platform (A) and stopped at any position. , an automatic positioning control means (C2) capable of stopping the elevating platform (Fe) at any time when it becomes flush with the cargo receiving surface of the cargo platform (A).