JP2015024820A5 - - Google Patents

Description

Loading platform lifting device

  The present invention relates to a load receiving table lifting device to which a cargo handling vehicle is attached.

  Conventionally, in order to save labor for loading and unloading loads, a cargo handling vehicle provided with a load receiving platform lifting device is known from Patent Document 1 described later.

JP 2004-58805 A

  By the way, in the cargo receiving platform lifting device disclosed in Patent Document 1, a control unit (power unit) U including a hydraulic drive mechanism 10 is mounted on the lower end of the column 2 and connected to the side surface of the control unit U. The hydraulic pipes 121 and 122 are respectively connected to a lift cylinder 5 housed in the connection frame 2c and a tilt cylinder 9 provided in the load receiving base 3, and are controlled by control oil pressure from the hydraulic drive mechanism 10. The lift cylinder 5 and the tilt cylinder 9 are operated so as to perform the lifting operation and the tilting operation of the load receiving platform 3.

  In such a load receiving table elevating device, it is necessary to regularly perform maintenance work on the control unit, the lift cylinder and the tilt cylinder. However, such work is troublesome, cumbersome, and poor in workability. In the case where it is attached to a different place, there is a problem that the tendency is further increased. In the known apparatus, no countermeasure is taken against such a problem.

  The present invention has been made in view of such circumstances, so that power units and hydraulic cylinders, particularly when they are mounted in a narrow place, can be easily and easily performed maintenance work thereof. An object of the present invention is to provide a novel cargo receiving table lifting device.

In order to achieve the above-mentioned object, the invention according to claim 1 is substantially the same as a pair of lifting columns parallel to each other provided on a body frame of a cargo handling vehicle, and a floor surface of a packing box fixed between the lifting columns. a connecting frame extending in the transverse direction of the vehicle body frame matched positions, vertically movable and overhanging the pair of lifting columns, and able to store receiving platform provided, a hydraulic cylinder capable of lifting drives the receiving platform, the hydraulic In a load receiving table lifting device including a power unit for driving a cylinder,
In the inside of the connection frame, the hydraulic cylinder is positioned on the front side of the cargo handling vehicle, the power unit is arranged in parallel along the longitudinal direction of the connection frame, the hydraulic cylinder is positioned on the rear side, and the connection frame is The connecting frame body having an opening that opens toward the rear of the cargo handling vehicle, and a cover body that opens and closes the opening, and the power unit is disposed at a position where the entire length is exposed from the opening,
The hydraulic cylinder and the power unit are connected by a flexible hydraulic hose to supply and discharge control hydraulic oil from the power unit to the hydraulic cylinder, and the power unit side connection end of the hydraulic hose is connected to the connecting frame. It is connected to the power unit along the longitudinal direction, the hydraulic hose, the hydraulic cylinder while connecting the power unit has a length capable of moving the power unit on the connection frame, the power unit The connecting frame can be taken out through the opening by moving in a direction intersecting the longitudinal direction of the connecting frame, and a space in the connecting frame after the power unit is taken out can be used as a maintenance space for the hydraulic cylinder. It is characterized by .

To achieve the above object, the present invention is of the second aspect, there is provided a connector described in claim 1, wherein the power unit is mounted via a mounting seat cushioned to the connecting frame, said mounting seat Is characterized in that the cushion and the mounting seat on the connecting frame are shifted laterally.

According to the invention of claim 1, wherein said hydraulic cylinder and said power unit are connected by a flexible hydraulic hose in order to supply and discharge the control hydraulic oil from the power unit to the hydraulic cylinder, the hydraulic hoses the power unit side connection terminal is connected to the power unit extends in the longitudinal direction of the connecting frame, the hydraulic hose, while connecting the power unit and the hydraulic cylinder, the moving to the maintenance position of the connecting frame outside Since the power unit has such a length, the power unit can be maintained in a wide space without removing or connecting the hydraulic hose, and the workability can be greatly improved.

In addition, the hydraulic cylinder can be easily maintained using the space generated when the power unit is removed .

In addition, a power unit with a high maintenance frequency can be immediately recognized through the opening of the connection frame, and the power unit can be easily taken out from the connection frame, so that the maintenance work can be performed quickly and easily.

According to the invention of claim 2 , the power unit is attached to the connection frame via a cushioned mounting seat, and the cushioning portion and the mounting portion of the mounting seat are shifted in the lateral direction. The power unit can reduce the total space of the power unit to reduce the occupied space in the connection frame, and can reduce the operating noise of the power unit.

Side view of a cargo handling vehicle equipped with a cargo receiving platform lifting device 1 is a perspective view of the load receiving platform lifting device as viewed in the direction of the arrow 2 in FIG. Sectional view along line 3-3 in FIG. 4 is a perspective view of a portion surrounded by an imaginary line in FIG. Enlarged sectional view taken along line 5-5 in FIG. 6 arrow view of FIG. Sectional view along line 7-7 in FIG. Enlarged sectional view taken along line 8-8 in FIG. Enlarged sectional view taken along line 9-9 in FIG. Enlarged sectional view taken along line 10-10 in FIG. FIG. 10 is an enlarged sectional view taken along line 11-11. FIG. 10 is an enlarged sectional view taken along line 12-12 of FIG. Exploded perspective view of the main part of the power unit Operational circuit diagram of the loading platform lifting device Action diagram showing the process of removing and installing the power unit

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  1 to 3, a cargo box V that is open to the rear is mounted on a body frame F of a cargo handling vehicle. A vertical lift type load receiving table lifting device E is mounted on the rear end surface of the cargo box V. The load receiving platform 1 held substantially horizontally is moved up and down between the ground and the floor surface of the cargo box V, and the cargo placed on the load receiving platform 1 is loaded and unloaded between the ground and the cargo box V. Can do.

  Next, the structure of the load receiving table elevating device E according to the present invention will be described.

  The load receiving table elevating unit E includes a pair of elevating support columns 2 and 2 extending in parallel to each other, a connecting frame 24 welded between the elevating support columns 2 and 2 substantially orthogonally thereto, and a pair of elevating and lowering units. The load receiving platform 1 is supported by the columns 2 and 2 so as to be movable up and down, and a hydraulic cylinder CY and a power unit PU provided in the connecting frame 24 are provided.

  The load receiving platform elevating unit E is integrated with the cargo handling vehicle by fixing a pair of left and right elevating columns 2 and 2 on the left and right sides of the rear end surface of the cargo box V in a substantially vertical direction via brackets 20 (see FIG. 7). It is mounted on.

  As shown in FIGS. 1 to 4, each lifting column 2 is formed of a hollow rectangular tube, a top plate 2 a is fixed to the upper end of the opening, and an intermediate plate 2 b is provided at the center in each lifting column 2. A vertical slit 4 for opening and lowering a slider 14 which will be described later is opened on the rear wall. In addition, a pair of guide rollers 5 for guiding the lifting operation of the inner column 3 is rotatably supported at the lower ends of the lifting columns 2, and the upper ends of the pair of lifting columns 2, 2 are Top fixing sheaves 36 and 37 for guiding wires 32 and 33, which will be described later, are rotatably supported by shafts, respectively, and a stopper 10 with which the lower end of the inner column 3 abuts is fixed to the lower end of each lifting column 2. ing.

In the pair of lifting columns 2, 2, a pair of right and left inner column 3, 3 are inserted their respective liftably fitted. Each inner column 3 is constituted by a hollow rectangular tube, and another vertical slit 7 is opened on the rear wall so as to coincide with the vertical slit 4 of the lifting column 2. As shown in FIG. 3, a guide roller 8 is rotatably supported at the upper end of each inner column 3 via a bracket 9, and the guide roller 8 is disposed behind the lifting column 2 when the inner column 3 is moved up and down. The inner surface of the inner column 3 is guided up and down by rolling on the inner surface of the wall. An elastic stopper 11 is provided at the lower end of each inner column 3, and this stopper 11 abuts against the stopper 10 at the lower end of the lifting column 2 to restrict the highest position of the inner column 3.

  Sliders 14 are inserted into the pair of inner columns 3, 3 so as to be movable up and down, and the rear edges of the sliders 14, 14 are formed on the inner columns 3, 3 and the lifting columns 2, 2. The vertical slits 4, 4; 7, 7 pass through the rear slits and extend rearward thereof, and are guided by the vertical slits 4, 4; 7, 7 to the lifting columns 2, 2 and the inner columns 3, 3. It can move up and down.

  Upper and lower guide rollers 15 and 16 are rotatably supported on the upper and lower portions of the sliders 14 and 14, and the guide rollers 15 and 16 are lifted and lowered with respect to the inner columns 3 and 3. When rolling, the inner surfaces of the inner columns 3 and 3 are rolled. A stopper rubber 17 is provided on the upper edge of each slider 14, and the stopper rubber 17 engages with the base plate 3a to regulate the ascending position of the slider 14. Brackets 18 and 18 are respectively fixed to lower ends of the outer surfaces of the pair of sliders 14 and 14, and the load receiving platform 1 rotates between these brackets 18 and 18 between a substantially horizontal protruding position and a substantially vertical storage position. The shafts 19 and 19 are provided so that they can be made. A stopper bolt 22 for engaging with the base end of the load receiving base 1 and locking it at the extended position is attached to the stay 21 fixed to the lower end of each slider 14 so that the vertical position can be adjusted. Yes.

  The load receiving platform 1 can be lifted and lowered together with the sliders 14 and 14 via the wire interlocking mechanism WM by an expansion / contraction operation of a hydraulic cylinder CY, which will be described later, and is substantially flush with the lowered position on the ground and the floor surface of the cargo box V. It is possible to move up and down between the raised positions, and the load on the load receiving platform 1 can be loaded and unloaded between the ground and the packing box V.

  As shown by the chain line in FIG. 3, the load receiving platform 1 can be manually rotated around the pivotal support 19 and 19 points between a substantially horizontal protruding position and a substantially vertical storage position. Folded so as to be substantially parallel along the pair of lifting columns 2 and 2. Between the front part of the load receiving platform 1 and the pair of lifting columns 2 and 2, there is provided a locking means (not shown) for securing the load receiving platform 1 to the storage position.

  As shown in FIGS. 4 and 7, the left and right ends of the connecting frame 24 extending in the lateral direction at positions substantially coincident with the floor surface of the packing box V are located in the middle portion in the vertical direction of the pair of lifting columns 2 and 2. Welded.

  The connection frame 24 is configured by a hollow rectangular tube body, and a cover body 24B is integrally fixed by a plurality of bolts and nuts 23 to an opening of a connection frame body 24A having a U-shaped cross section. . The opening of the connecting frame main body 24A is opened toward the rear of the cargo handling vehicle.

  A hydraulic cylinder CY and a power unit PU, which will be described later, are detachably attached to the inside of the connection frame 24 from the opening of the connection frame main body 24A.

  As shown in FIGS. 4 to 7, a rib plate 25 is fixed to one end portion in the connecting frame 24 (the left end portion in the forward direction of the cargo handling vehicle). The rib plate 25 extends in the center in the width direction at the end of the connection frame 24 in the vertical direction, and the upper and lower edges thereof are welded to the upper and lower inner surfaces of the connection frame 24. The rib plate 25 is provided with a mounting hole H1, and the hydraulic cylinder CY is mounted in the mounting hole H1.

  The hydraulic cylinder CY is disposed along the longitudinal direction in the connecting frame 24 so as to be biased forward (see FIG. 6), and the base end of the cylinder barrel 26 is connected to the rib plate 25 with the connecting pin. 28 and bolts 29 are attached. The connecting pin 28 passes through the mounting hole H1 and is rotatably fitted into the base portion of the cylinder barrel 26 of the hydraulic cylinder CY, and the base end of the connecting pin 28 is screwed to the rib plate 25 with a bolt 29. As a result, the hydraulic cylinder CY is mounted in the connection frame 24.

  The hydraulic cylinder CY is linked to and connected to the load receiving platform 1 via a wire interlocking mechanism WM described below, and according to the expansion and contraction operation of the hydraulic cylinder CY, the load receiving platform 1 is moved along the pair of lifting columns 2 and 2. Raised and lowered.

  The wire interlocking mechanism WM has a conventionally known structure, and is provided across the connection frame 24 and the pair of right and left lifting columns 2 and 2.

  As shown in FIG. 4, left and right movable sheaves 31l and 31r that can move in the vehicle width direction via a bracket 30 are rotatably attached in parallel to the tip of the cylinder rod 27 of the hydraulic cylinder CY. 30 is slidably supported on a guide rail 38 fixed in the connecting frame 24 along the longitudinal direction. As shown in FIG. 2, a pair of left and right side fixed sheaves 34 l and 34 r are rotatably mounted in parallel on the left lifting column 2 in close proximity to the coupling portion with the connecting frame 24, and the right lifting column A right side fixed sheave 35 is rotatably attached to the column 2 in the vicinity of the right end of the connecting frame 24, and left and right top fixed sheaves 36 and 37 are provided above the left and right lifting columns 2 and 2. Each is mounted for rotation.

As shown in FIGS. 2 to 7, left and right systems of wires 32 and 33 are connected to the hydraulic cylinder CY. That is, one end of the left wire 32 is bound to a block 32 a welded to the side surface of the connection frame 24. The wire 32 extends along the connecting frame 24, and the left movable sheave 31l, the left side fixed sheave 34l, and the left top fixed sheave 36 are wound around in order, and the other end is bonded to the left slider 14. ing. Similarly, one end of the right wire 33 is connected to a block 33a welded to the bottom surface of the connecting frame 24 and extends along the connecting frame 24. The right movable sheave 31r, the right side fixed sheave 34r, 35 and a right top fixed sheave 37 are wound around in sequence, and the other end is bound to the right slider 14.

  Therefore, if the hydraulic cylinder CY is expanded and contracted, the pair of left and right sliders 14 and 14 are moved up and down synchronously via the two systems of wires 32 and 33, and the load receiving platform 1 connected thereto is moved up and down. Can do.

The power unit PU for driving and controlling the hydraulic cylinder CY is located on the rear side in one end portion of the connection frame 24 (see FIG. 6), and the hydraulic cylinder CY located on the front side of the power unit PU and the length of the connection frame 24 Arranged in parallel along the direction .

  Next, the structure of the power unit PU will be described with reference to FIGS.

The power unit PU includes an electric motor 40, a gear pump 41, an oil tank 42, and a valve block 43, which are fixed in a row in the order of the electric motor 40, the gear pump 41, the oil tank 42, and the valve block 43, and are elongated. have summarized as a unit body, the one side of the hydraulic cylinder CY are parallel disposed, it is Attach to detachably on the bottom surface of the connecting frame 24.

  The pump flange 50 provided with the gear pump 41 is fixed between the electric motor 40 and the oil tank 42, and is formed in a square flange shape. The motor cover of the electric motor 40, the tank cover of the oil tank 42, and Also used as a pump cover for the gear pump 41. One end of the motor main body 40A is abutted against one end surface of the pump flange 50 in the axial direction via the packing 52, and the electric motor 40 passes through the motor cover 40B at the outer end of the motor main body 40A and passes through the motor cover 40B. It is fixed to the pump flange 50 by a plurality of connecting bolts 51 that pass through and are fastened to the outer periphery of the pump flange 50. Further, one end of the tank main body 42A is oil-tightly fitted to the disc-shaped protrusion 50A formed on the other end surface of the pump flange 50 through the packing 53, and the other end of the tank main body 42A is the valve block 43. The three parts of the pump flange 50, the oil tank 42, and the valve block 43 are fitted in an oil-tight manner to the disc-shaped protrusion 43A formed on the inner end surface of the cylinder through the packing 54. Are integrally fastened by four tie rods 55 extending in a straight line. One end of each tie rod 55 is screwed into each of the four corners of the pump flange 50, and the other end penetrates through holes 56 formed in the four corners of the valve block 43 and is fixed to the valve block 43 by nuts 57. .

  An oil pump (gear pump) 41 is fixed to the pump flange 50 on its central axis. That is, a pump case 60 having a pump gear 61 built in is fixed to the center portion via the bolt 62. An output shaft 63 of the electric motor 40 is connected to a drive shaft 65 of the oil pump 41 via a coupling 64. The oil pump 41 has a pump case 60 and a suction system 66 connected thereto accommodated in the oil tank 42. The suction system 66 has an oil strainer 68 connected to the suction port via a suction adapter 67, and the oil in the oil tank 42 is directly sucked through the oil strainer 68. An oil supply port 71 for supplying oil to the oil tank 42 and a breather 72 for breathing the oil tank 42 are provided at the upper part of the pump flange 50. The breather 72 is for breathing the oil tank 42. The port 72P is opened. The breather 72 is located at the uppermost position when the load receiving platform elevating unit E is attached to the cargo handling vehicle so that the oil in the oil tank 42 does not leak to the outside.

  The recess provided in the discharge port of the gear pump 41 is connected to the discharge port of the oil pump 41 and the high-pressure pipe 70 by inserting one end of the high-pressure pipe 70. The high-pressure pipe 70 passes through the oil tank 42 vertically. The other end is inserted into a recess provided at the inlet of the valve block 43 so that the high pressure pipe 70 and the inlet of the valve block 43 are connected, and the pressurized oil from the oil pump 41 passes through the high pressure pipe 70 to the valve. This is supplied to block 43. When the pump flange 50 and the valve block 43 are fastened and fixed by the tie rod 55, the high-pressure pipe 70 is supported at both ends by a recess provided at the discharge port of the gear pump 41 and a recess provided at the inlet of the valve block 43. The

  The valve block 43 is integrally provided with a solenoid valve 45, a flow control valve 46, a relief valve 47, a check valve 48, and the like.

  As described above, the power unit PU integrally formed by arranging the electric motor 40, the oil pump 41, the oil tank 42, and the valve block 43 in series in the order is elastically supported in the connecting frame 24 so as to be detachable. Hereinafter, the support structure will be described.

As shown in FIGS. 5 and 9, a power unit accommodation space 75 is formed in the connection frame 24 on one side (the vehicle rear side) of the hydraulic cylinder CY. More removing the cover body 24B of the connecting frame 24, the power unit PU is accommodated in the power unit housing space 75. In the power unit accommodation space 75, the power unit PU is attached to the bottom surface of the connection frame 24. As shown in FIG. 10, a pair of mounting holes H2, H2; H2 ', H2' are formed on the left and right sides of the bottom surface of the connecting frame 24 with a space therebetween in the left-right direction. A rectangular base plate 76 having a cross-sectional channel shape is attached to H2; H2 ′ and H2 ′ via attachment seats 77 and 77, and the power unit PU is installed and fixed on the base plate 76.

  As shown in FIG. 13, each mounting seat 77 is formed in a three-layer structure by baking and fixing upper and lower mounting plates 77U and 77D on the upper and lower surfaces of a plate-like cushion rubber 77R. In particular, the mounting seat 77 is configured by shifting the mounting portion and the cushion portion in the lateral direction. The upper mounting plate 77U and the cushion rubber 77R are substantially the same size and formed in a plane convex shape, whereas the lower mounting plate 77D is formed in a square shape, and the upper mounting plate 77U and the cushion rubber of the lower mounting plate 77D. Paired weld nuts 82 are welded to the front and rear positions avoiding 77R.

  As shown in FIGS. 10 and 12, at one end in the longitudinal direction of the base plate 76 (left side in FIG. 10), two connecting bolts 79 and 79 penetrating the lower mounting plate 77D and the cushion rubber 77R of the mounting seat 77 are connected to the base plate 76. On the other hand, the other end side (the right side in FIG. 11) of the base plate 76 in the longitudinal direction is connected to the lower mounting plate 77D of the mounting seat 77 and the two cushion bolts 77 'and 79 through the cushion rubber 77R. 'Is screwed into the nuts 80, 80 on the base plate 76 through the base plate 76, whereby the pair of mounting seats 77, 77 are fixed to the bottom surface of the power unit PU.

  Further, as shown in FIGS. 10 and 12, a bolt 78 inserted through the attachment holes H2, H2; H2 ′, H2 ′ from below the connection frame 24 is screwed to the weld nut 82 of the attachment seats 77, 77. The pair of mounting seats 77 and 77 are fixed to the bottom surface of the connecting frame 24. When the plurality of bolts 78 are screwed off from the weld nut 82, the power unit PU can be detached from the connection frame 24 together with the mounting seats 77, 77.

  Thus, the mounting seat 77 has the elastic support height of the power unit PU in the connecting frame 24 by the mounting seat 77 by shifting the cushion rubber 77R and the mounting portion to the connecting frame 24 in the lateral direction. It becomes possible to keep the power unit PU low, and the power unit PU can be easily attached to and detached from the narrow connecting frame 24, and the operating noise of the power unit PU can be reduced.

  The valve block 43 is directly fixed to the base plate 76 by other bolts 81.

As shown in FIGS. 5 and 15, one end of a flexible hydraulic hose 90 made of rubber, soft synthetic resin, or the like is connected to the one end side of the power unit PU, that is, the discharge side of the valve block 43. is connected along the direction, the hydraulic hose 90 is extended to the other end of the power unit PU in the longitudinal direction of the side of the power unit PU, is connected to the base of the cylinder barrel 26 of the hydraulic cylinder CY .

  Thus, the flexible hydraulic hose 90 is used to take out the power unit PU from the connecting frame 24 while the power unit PU and the hydraulic cylinder CY are connected, or to move the connecting unit 24 in the longitudinal direction thereof. Have the required length. As shown in FIGS. 5, 8, and 9, a plurality of intermediate portions of the hydraulic hose 90 are supported by clips 91 attached to the upper surface of the connection frame 24. The clip 91 is made of a steel plate in which the support portion 90a of the hydraulic hose 90 is covered with a covering material such as vinyl chloride, and both ends of the clip 91 that supports the winding of the hydraulic hose 90 by the support portion 90a are overlapped. The both ends of the connecting frame 24 are suspended and supported on the upper surface of the connecting frame 24 by supporting bolts 93 welded to the upper surface of the connecting frame 24 and nuts 94 screwed there.

As shown in FIG. 4 and 9, the corner portion between the surface and the lower surface after a connecting frame 24 is an inclined surface 2 4a, when increasing the receiving platform 1, so as not to interfere with the load to be stacked thereon In addition, a safety bar 39 extending along the connection frame 24 is supported at the lower rear surface of the connection frame 24, and the operation of the power unit PU can be urgently stopped by the operation of the safety bar 39. Yes.

  As shown in FIGS. 4 and 5, a contactor 44 connected to the electric circuit of the power unit PU is provided on one surface of the rib plate 25 to which the hydraulic cylinder CY is attached. It is fixed with bolts 59. A terminal block T for connecting the battery 49 and the main switch Sm in the cab is fixed to the left side of the front surface of the connecting frame 24 in the vehicle traveling direction.

  FIG. 14 shows an electric and hydraulic circuit diagram of the power unit PU. In an electric circuit connecting the electric motor 40 and the vehicle battery 49, there are a main switch Sm provided in the driver's cab of the vehicle, and a control switch Sc arranged on the upper side of the lifting column 2 on the left side in the vehicle traveling direction (see FIG. 1). ) And the contactor 44 are connected. A gear pump 41 is connected to the electric motor 40, a discharge side of the gear pump 41 is connected to a high pressure chamber of a single-acting hydraulic cylinder CY via a hydraulic pipe 96, and an intake side thereof is connected to an oil strainer 68 via an oil strainer 68. Connected to the tank 42. The upstream side of the hydraulic pipe 96 from the check valve 48 is communicated with the oil tank 42 via the relief valve 47, and the downstream side of the hydraulic pipe 96 from the check valve 48 is the solenoid valve 45 and the flow control valve. The oil tank 42 is communicated with the fuel tank 42 through 46.

[Uplift operation of the loading platform]
When the main switch Sm is turned “ON” and then the “up” of the control switch Sc is pressed, the contact of the contactor 44 is turned on and the electric motor 40 is rotated.

  When the gear pump 41 is driven by the rotation of the electric motor 40, the oil in the oil tank 42 is sucked up, pressurized, and pumped to the hydraulic cylinder CY via the check valve 48. As a result, the hydraulic cylinder CY is extended, and the slider 14 is lifted through the wire interlocking mechanism WM as described above to lift the load receiving platform 1. When the load on the load receiving platform 1 exceeds a predetermined value, the relief valve 47 is opened, and the pressurized oil from the gear pump 41 is returned to the oil tank 42 through the relief valve 47.

[Dropping operation of the receiving platform]
When the “lower” of the control switch Sc is pressed, the solenoid valve 45 is switched, the oil in the hydraulic cylinder CY is returned to the oil tank 42, the hydraulic cylinder CY is contracted, and the load receiving platform 1 is lowered by its own weight. To do. At this time, the flow control valve 46 restricts the amount of oil returned to the oil tank 42 and slowly lowers the load receiving platform 1.

  By the way, the power unit PU provided in the connection frame 24 includes an electric motor 40, a gear pump 41, an oil tank 42, and a valve unit 43. When performing maintenance work, the power unit PU is installed in the connection frame 24. Since the operation is difficult with the attachment, the power unit PU needs to be taken out of the connection frame 24.

  Accordingly, a process of taking out the power unit PU from the connection frame 24 to the outside will be described with reference to FIG.

  (1) As shown in FIG. 15A, the plurality of bolts and nuts 23 are detached, and the cover body 24B is removed from the connecting frame main body 24A.

  (2) Next, by detaching the plurality of bolts 78, the power unit PU is separated from the connection frame main body 24A together with the mounting seat 77 and the base plate 76, and further, the plurality of clips 91 are removed, and the hydraulic hose 90 is connected to the connection frame main body. Separate from 24A.

(3) As shown in FIG. 15 (B), the power unit PU is moved in the width direction from the opening of the connection frame main body 24A , taken out to the outside, and placed on the connection frame main body 24A. At this time, as described above, the hydraulic hose 90 remains connected to the power unit PU and the hydraulic cylinder CY. And the maintenance work of power unit PU can be easily performed outside the connection frame main body 24A. Further, the maintenance work of the hydraulic cylinder CY can be easily performed by utilizing the space generated when the power unit PU is removed.

  (4) After the operation is completed, the power unit PU is returned to the connecting frame main body 24A while being connected to the hydraulic cylinder CY by the hydraulic hose 90.

  As described above, the power unit PU housed in the connection frame 24 can be taken out of the connection frame 24 and maintenance work can be performed while maintaining the connection state with the hydraulic cylinder CY by the hydraulic pipe 90. Further, in order to store the power unit PU and the hydraulic cylinder CY in the narrow connecting frame 24, it is necessary to arrange them close to each other, but the power unit PU having a high maintenance frequency is close to the opening of the connecting frame 24. By arranging on the vehicle rear side, the maintenance work of the power unit PU can be performed as soon as the cover body 24B is removed.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.

For example, in the previous SL embodiment, the hydraulic hose 90 takes the power unit PU from the connecting frame within 24, or has been described for the case where the length that can move the connecting frame 24 in the longitudinal direction, connecting the hydraulic cylinder CY frame 24. In this case, the hydraulic hose 90 has such a length that it can be taken out from the connecting frame 24. In the above embodiment, and it can slide up and down by inserting the inner column 3 in the lifting columns 2, 2 a pair, but moves up and down the slider 14 along the lifting column 2, 2 and the inner column 3, The slider 14 may be moved up and down directly in the lifting columns 2 and 2.

1 receiving platform 2 lifting columns 24 connecting frame 77 mounting seat 77R cushions
7 8 Mounting (Bolt)
82 Mounting (weld nut)
90 Hydraulic hose 42 Oil tank F Body frame CY Hydraulic cylinder PU Power unit
V packing box

Claims (2)

A pair of parallel lifting / lowering columns (2, 2) provided on the body frame (F) of the cargo handling vehicle , and fixed between these lifting / lowering columns (2, 2) and substantially coincide with the floor surface of the cargo box (V) a connecting frame extending in the transverse direction of the vehicle body frame (F) at position (24), said vertically movable and overhanging, receiving platform which is provided so as to be stored in a pair of lifting columns (2,2) and (1), wherein In a load receiving table lifting device including a hydraulic cylinder (CY) capable of moving up and down the load receiving table (1) and a power unit (PU) for driving the hydraulic cylinder (CY),
Inside the connection frame (24), the hydraulic cylinder (CY) is positioned on the front side of the cargo handling vehicle, the power unit (PU) is positioned on the rear side thereof, and the longitudinal direction of the connection frame (24). The connection frame (24) is arranged in parallel along the direction, and the connection frame (24) includes a connection frame body (24A) having an opening that opens toward the rear of the cargo handling vehicle, and a cover body (24B) that opens and closes the opening. The power unit (PU) is arranged at a position where the entire length is exposed from the opening,
The hydraulic cylinder (CY) and the power unit (PU) are connected by a flexible hydraulic hose (90) to supply and discharge control hydraulic oil from the power unit (PU) to the hydraulic cylinder (CY). The connecting end of the hydraulic hose (90) on the power unit (PU) side is connected to the power unit (PU) along the longitudinal direction of the connecting frame (24), and the hydraulic hose (90) is connected to the hydraulic cylinder (CY). ) And the power unit (PU), the power unit (PU) has a length that allows the power unit (PU) to move onto the connection frame (24). The power unit (PU) is connected to the connection frame (24). ) Can be taken out through the opening by moving in a direction crossing the longitudinal direction of the power unit (PU) Connecting frame, characterized in that it is possible to the space in the (24) and the maintenance space of the hydraulic cylinder (CY), receiving platform lifting equipment for after. The power unit (PU) is attached to the coupling frame (24) via a cushioned mounting seat (77). The mounting seat (77) is connected to the cushion (77R) and the coupling frame (24). The load receiving platform lifting / lowering device according to claim 1, characterized in that the mounting (78, 82) is shifted laterally.