JP2003127923A - Turning over machine for lift truck frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and efficiently perform a frame turning over work. SOLUTION: This machine includes a roughly U-shaped rotary frame 69 projectingly provided from an end part of a drive shaft 68 along a axial center O of the drive shaft 68 in a forked shape, three supporting members 70a, 70b provided on an inner circumference surface center and inner circumference both ends of the rotary frame 69 respectively and supporting a lower surface of a frame 3 inserted into a recess part 69a of the rotary frame 69, and four cramping devices 71 provided on an upper surface center and upper surface both ends of the rotary frame 69 and holding the upper surface of the frame 3 inserted into the recess part 69a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame reversing machine for a lift truck, which can perform frame reversing work safely and efficiently.

[0002]

2. Description of the Related Art An example of a lift truck is shown in FIGS. This is called a low lift type, and has a truck body 1 and a lift 2, and a frame 3 of the truck body 1 has a bumper 3a having a substantially U shape in plan view and an end portion of the bumper 3a. It has a pair of brackets 3c erected via a erection plate 3b installed between them, and a standing rod 3d erected at each end of the bumper 3a. The caster wheel 4 is attached to the lower surface of the frame 3 Fixed frame 3 in which the lower parts of a pair of lift cylinders 5 inserted into the track body 1 from the lower surface side of 3 are fixed to the erection plate 3b.
It is connected to e through a pin 6. Reference numeral 7 denotes a cover placed on the frame 3, and an operation arm 9 is connected to a drive motor (not shown) with a drive wheel 8 arranged in the cover 7, and the operation arm 9 is operated. As a result, the truck body 1 can be run in a desired direction.

The lift 2 has a bottomed rectangular cylindrical battery box 2a and a pair of forks 2b extending horizontally from the lower surface of the battery box 2a. The support shaft 11 is provided in the tip of each fork 2b. A rocking frame 12 that can be rocked about the rocking frame, a load wheel 13 that is rotatably attached to the rocking frame 12, and a rod 14 that is pin-connected to the rocking frame 12 are incorporated. One end of the link 15 is connected to the lower surface of the battery box 2a via pins 16 and 17, and one end of the link 19 is connected to the pair of projecting frames 18 projecting on the rear surface of the battery box 2a via the pin 20. ing. In addition, 21 is a battery box 2
It is a lid that covers the upper opening of a.

With the frame 3 and the fork 2b brought close to each other (see FIGS. 23 and 24), each link 15,
The other end of 19 is connected to each bracket 3c via pins 22 and 23, and the tip of the piston rod of each lift cylinder 5 is connected to each projection frame 18 via pin 24, and the fork 2b is lowered. By operating the operation arm 9 to extend and drive the lift cylinder 5 in the state (see the solid line in FIG. 23), the battery box 2a is lifted, and the load wheel 13 is supported by the load shaft 13 via the rod 14 and the swing frame 12. The fork 2b is also lifted by being moved downward with the center of as the center, and the load W on the fork 2b is pushed up (see the phantom line in FIG. 23).

Explaining the procedure for assembling a conventional lift truck, as shown in FIG. 25 (a), a wire rope 26 extending from a crane is hooked on a fork 2b, the fork 2b is laid over, and then the wire rope 26 is pulled over. Hook it again on the fork 2b, flip the fork 2b,
Next, as shown in FIG. 25 (b), the fork 2 b whose lower surface is turned upside down by being inverted is placed on the work table 27, and
As shown in FIG. 5 (c), the swing frame 1 is provided in each fork 2b.
2, each component such as the road wheel 13 and the rod 14, and the link 15 are incorporated, and the link 1 is attached to each projecting frame 18.
25, the forks 2b are normally rotated in the reverse order of the above, as shown in FIG. 25 (d).

Further, as shown in FIG. 26 (a), the wire rope 26 is hooked on the frame 3 and the frame 3 is turned over, and then the wire rope 26 is hooked again on the frame 3 to invert the frame 3. Next, FIG.
As shown in (b), the frame 3 whose lower surface is turned upside down by being inverted is placed on the work table 27, the caster wheel 4 is attached to the lower surface of the frame 3, and the fixed frame 3 is attached.
The lower part of the lift cylinder 5 is connected to e through a pin 6,
As shown in FIG. 26 (c), the frame 3 is rotated forward and placed on the workbench 27 in the reverse order of the above.

Then, as shown in FIG. 26 (c), the fork 2b incorporating the above-mentioned components is lifted up to approach the frame 3, and as shown in FIG. 26 (d), the respective links 15, 19 are connected. The other end of the lift cylinder 5 may be connected to each bracket 3c of the frame 3 via pins 22 and 23, and the tip of the piston rod of each lift cylinder 5 may be connected to each projection frame 18 of the fork 2b via a pin 24.

[0008]

SUMMARY OF THE INVENTION In the above conventional configuration,
Using a crane to flip the frame 3,
In this case, since it is necessary to hook the wire rope 26 extending from the crane on the frame 3 and roll the frame 3 over the floor surface a plurality of times, the overturning work takes time and time, and the work efficiency is low. There is also a problem in safety, and the paint applied to the frame 3 may be peeled off due to impact at the time of overturning or contact with the wire rope 26, which requires time and effort for repainting, resulting in cost increase.

In view of the above-mentioned conventional drawbacks, it is an object of the present invention to provide a reversing machine for a lift truck frame, in which the reversing work of the frame is carried out safely and efficiently so that repainting is unnecessary.

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 is a substantially U-shaped rotation provided by projecting from the end of the drive shaft in a bifurcated manner along the axis of the drive shaft. A frame, a support member for supporting the lower surface of the frame, which is provided at the center of the inner peripheral surface and both ends of the inner surface of the rotary frame and is inserted into the recess of the rotary frame, and the center and the upper surface of the upper surface of the rotary frame. It has a clamp device for pressing the upper surface of the frame which is provided at both ends and is inserted into the recess.

According to the above construction, the frame can be securely attached to the rotary frame by inserting the frame into the concave portion of the rotary frame and placing it on each support member and pressing the upper surface of the frame by each clamp device. The frame can be clamped, and the frame can be safely and efficiently inverted by simply rotating the drive shaft a half turn in the clamped state, and parts can be quickly and easily attached to the inverted frame, and the frame can be inverted. At this time, the paint applied to the frame is not peeled off, and the painting cost is low because repainting is unnecessary.

According to a second aspect of the present invention, in the first aspect of the invention, the central support member is fixed to the center of the inner peripheral surface of the rotary frame, and a positioning block is provided on the upper surface of the support member of the drive shaft. It is characterized in that it is arranged so as to be retractable in a direction substantially parallel to the axis, and that a lock tool for locking the positioning block at a predetermined position of the support member is provided.

According to the above construction, the positioning block disposed on the central support member is projected and retracted in accordance with the width of the frame in the front-rear direction, and the positioning block is locked to the support member by the locking tool and then positioned with the support member. Only by bringing the central portion of the frame into contact with the block, the central portion of the frame can be reliably positioned and supported so as not to move unexpectedly.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described above, the support members at both ends are arranged at both ends of the rotary frame so as to be retractable along the direction substantially orthogonal to the axis of the drive shaft, and the support members are locked at both ends of the rotary frame. It is characterized in that it is provided with a locking tool.

According to the above construction, the support members at both ends are projected and retracted in accordance with the width of the frame in the left-right direction, and the support members are locked to both ends of the rotary frame by the lock tool, and then the frame is placed on the upper surface of each support member. It is possible to support both sides of the frame so that they do not accidentally move by simply mounting both sides of the frame.

A fourth aspect of the present invention is characterized in that, in the third aspect of the invention, frame fitting recesses are formed on the upper surfaces of the support members at both ends.

According to the above construction, by fitting the lower edges of both side portions of the frame into the fitting recesses of the support members at both ends, the both side portions of the frame can be surely positioned so as not to move unexpectedly. .

According to a fifth aspect of the invention, in the invention according to any one of the first to fourth aspects, each of the clamp devices reciprocates a clamp shaft about its axis between a clamp position and an unclamp position. It is characterized by comprising a hydraulic cylinder that rotates and expands and contracts the clamp shaft at a predetermined position along the axial center at a clamp position, and a clamp lever is detachably attached to the tip of the clamp shaft.

According to the above structure, by holding the clamp lever fixed to the clamp shaft of each clamp device at the unclamp position, the frame can be easily placed in the recess of the rotary frame without being obstructed by the clamp lever. The clamp lever is pressed against the upper surface of the frame by driving each clamp device from the unclamped state and rotating the clamp shaft to the clamp position side, and the frame is turned into the rotary frame. It can be securely clamped.

According to a sixth aspect of the present invention, in the fifth aspect, the height adjusting block is detachably attached to the clamp lever.

According to the above construction, even if the height of the frame is small, by mounting the height adjusting block on the clamp lever, the frame can be reliably clamped by the clamp lever via the height adjusting block. .

According to a seventh aspect of the invention, in the invention of the sixth aspect, a substantially T-shaped groove is formed on the upper surface of the height adjusting block, and a pair of convex portions is formed on both side surfaces of the tip of the clamp lever. A ridge portion is formed, the concave grooves are fitted to both of the ridge portions, the height adjusting block is attached to the clamp lever, and the height adjusting block is locked to the clamp lever by a locking tool. Is characterized by.

According to the above construction, the height adjustment block can be adjusted simply by fitting the concave groove of the height adjustment block into the pair of ridges of the clamp lever and locking the height adjustment block with the clamp lever by the lock. The block can be securely attached to the clamp lever, and the height adjustment block can be easily removed from the clamp lever simply by unlocking the lock tool from the clamped state and pulling the height adjustment block. .

[0024]

1 shows a lift truck assembling apparatus according to an embodiment of the present invention, which is a frame reversing machine 30 and a fork reversing machine 31 for reversing a frame 3 and a fork 2b, respectively. And a trolley 32 arranged between the two reversing machines 30 and 31.
A height detection device 33 is provided which detects the height of the fork 2b placed on the upper part 2.

As shown in FIGS. 2 to 4, the trolley 32 has a trolley body 32 on which a loading platform 32a capable of lifting and lowering a and b is placed.
b, and a leg portion 32 protruding from the lower surface of the carriage main body 32b.
c is inserted into the slit 35a of the deck 35,
The wheels 32d provided on the leg portions 32c are in contact with the guide rails 36 on the floor surface F, and by driving the drive motor 37 provided on the truck main body 32b in the forward and reverse directions, the truck 3
2 can be run along the guide rail 36 in the front-rear directions c and d.

A pair of cross girders 39 are fixed on the top plate portion 38 of the loading platform 32a at predetermined intervals in the front-rear directions c and d,
As shown in FIG. 5, a large number of free rollers 40 arranged on the lower surface of the top plate portion 38 at a predetermined interval are rotatably abutted on the upper surface of the loading platform 32a, so that the top plate portion 38 and the loading platform 32a are connected.
A plurality of lock members 42 in a plurality of lock holes 41 penetrating the
The lower end protrusion 42a of the lock member 4 is inserted.
2 is pulled out from each lock hole 41 and the top plate portion 38 is moved horizontally, so that the fork 2 placed on the cross beam 39 is removed.
The position of b can be finely adjusted in the front-rear and left-right directions c, d, e, f, whereby the work of connecting the fork 2b and the frame 3 (described later) can be easily performed.

The fork reversing machine 31 is shown in FIGS.
As shown in FIG. 5, the shaft 44 of the drive shaft 46 is rotatably installed on the bearing 44 provided between the normal rotation area A and the reverse rotation area B and is rotated in the normal rotation g or the reverse rotation h by the drive motor 45. A pair of rotating arms 47 extending in a direction orthogonal to the center O and parallel to each other, and arranged between the rotating arms 47 at predetermined intervals along the longitudinal direction of the rotating arms 47. A pair of sliders 48 and both sliders 4
8, a pair of pressing members 50 arranged on each slider 48, and a pressing member for moving each pressing member 50 along a direction orthogonal to the approaching / separating direction of both sliders 48. Member drive mechanism 5
1 and. In FIG. 6, 47a is a balance weight provided at the base end of the rotating arm 47, and 52 is a pedestal standing upright in the reversing area B, which receives the reversing h of the rotating arm 47 in a horizontal state. It is a thing.

As shown in FIGS. 8 to 10, the slider driving mechanism 49 has a pair of guide rods 54 inserted through the through holes of the bearing block 53 and the through holes of the sliders 48, which are installed between the two rotary arms 47. One end of each guide rod 54 is fastened to each slider 48 by a coupling tool 56a and a fastening tool 56b, and the coupling tool 56a and the bearing block 53 have a cylinder device 55 including a hydraulic cylinder. The rack 57 formed on each of the guide rods 54 is connected to both ends, and the rack 57 is attached to the pinion 58 on the bearing block 53.
9 and the cylinder device 55 is driven to contract, the slider 48 on the left side in FIG. 9 and the guide rod 54 on the lower side in FIG. 9 are moved to the right side, and in conjunction with this, via the rack 57 and the pinion 58. By moving the guide rod 54 on the upper side of FIG. 9 and the slider 48 on the right side of FIG. 9 to the left side, both sliders 48 are moved closer to each other, and the cylinder device 55 is extendedly driven. The sliders 48 are separated from each other.

As shown in FIG. 8, each pressing member 50 is formed in a substantially T-shape in a front view, and projections 50a for lifting the forks 2b are integrally projectingly provided at the tip ends of both side surfaces thereof. The recess 50 from the top surface to the front surface and the back surface
b is formed. Further, a synthetic resin wear-resistant material 59 such as polytetrafluoroethylene having a small friction coefficient is formed on the lower surface of the rotating arm 47 and the fork contact surfaces from both side surfaces of each pressing member 50 to each protrusion 50a.
Since the rotating arm 47 and each pressing member 50 are engaged with the fork 2b through the wear resistant material 59, the paint applied to the fork 2b is not peeled off.

The pressing member drive mechanism 51, as shown in FIGS.
8 has a pair of movable substrates 61 fixed to the lower end of a guide rod 60 that movably penetrates in a direction orthogonal to the approaching / separating direction of the slider 8. Both ends of the movable substrate 61 and sliders 48 are connected to each other. Cylinder device 62 composed of a hydraulic cylinder or the like is provided, each movable substrate 61 is inserted into the recess 50b of each pressing member 50, and each pressing member 50 is eccentric to the rear d from the center thereof by a predetermined distance. Bolts 64 that are rotatably pivotally attached to each movable substrate 61 through the pivot shafts 63 that are provided, and projecting portions 61a that project from the front and rear ends of each movable substrate 61 restrict the rotation range of each pressing member 50. Are screwed together, and each pressing member 50 is attached to the pivot shaft 63.
Is tilted forward and downward at a predetermined angle r.

The procedure for clamping the fork 2b will be described. As shown in FIG. 11A, when the space s between the forks 2b is narrow, the rotary arm is widened with the space between the two pressing members 50 widened. 47 for both forks 2 on the loading platform 32a
b, and as shown in FIG. 11B, the loading platform 32a
Is moved to position the fork 2b at a predetermined height between the pressing members 50, and the slider drive mechanism 49
11 (c), the forks 2b are clamped by the pressing members 50 and the pressing member drive mechanism 51 is driven to rotate the pressing members 50, as shown in FIG. 11 (c). As shown in FIG. 11D, by moving the fork 2 b to the moving arm 47 side, the fork 2 b is lifted by the inner protrusions 50 a of the two pressing members 50 and pressed against the turning arm 47, whereby the fork 2 b is turned. Clamp to 47.

When the distance s between the forks 2b is large, the distance between the pressing members 50 may be narrowed so that the outer protrusions 50a of the pressing members 50 engage with the forks 2b.

The height detecting device 33 is shown in FIGS.
As shown in (b), it comprises a photoelectric projector 33a and a light receiver 33b which are arranged at a height position with a predetermined space i (for example, 900 mm) from the deck 35 with the normal rotation area A interposed therebetween. , A loading platform 32a on which the fork 2b is placed
Is raised, and the projector 2 is moved by the upper surface 2A of the fork 2b.
It is possible to stop the fork 2b on the cargo bed 32a at a desired height position by stopping the rising of the cargo bed 32a based on the detection signal when the light beam projected from the light receiver 3b to the light receiver 33b is blocked. it can.

The height detecting device 33 includes an abnormality detecting device 6
6 are juxtaposed. This is a photoelectric projector 66a arranged at a height position with a distance k (for example, 10 mm) narrower than a distance j between the height detection device 33 and the rotating arm 47 in the horizontal state in the normal rotation area A. The upper surface 2A of the fork 2b receives light from the projector 66a even when the height detection device 33 does not operate when the loading platform 32a on which the fork 2b is mounted is lifted. When the light beam projected to the container 66b is blocked, the ascending of the loading platform 32a is emergency stopped based on the detection signal, whereby the upper surface 2A of the fork 2b is brought into contact with the rotating arm 47. You can prevent accidents.

As shown in FIGS. 12 to 15, the frame reversing machine 30 is arranged such that the drive shaft 68 is rotated by a drive motor (not shown) in the machine frame 67 from the end of the drive shaft 68. A substantially U-shaped rotary frame 69 protruding in a bifurcated shape along the center O, and three supports projecting from the center and both ends of the inner peripheral surface of the rotary frame 69 into the recess 69a of the rotary frame 69. It has members 70a and 70b and four clamp devices 71 provided at the center of the upper surface of the rotary frame 69 and at both ends of the upper surface.

As shown in FIGS. 13 to 16, the central supporting member 70a is fixed on a receiving plate 73 with a reinforcing frame 73a protruding from the center of the inner peripheral surface of the rotary frame 69 into the recess 69a, and its center. The drive shaft 6 at the center of the upper surface of the supporting member 70a of
A slide groove 74 is formed substantially along the axis O of 8 (that is, the front-rear direction c, d), and a positioning block 75 is slidably fitted in the slide groove 74. A pair of lifting prevention plates 76 that prevent the positioning block 75 from lifting by engaging with the protruding flange 75a is provided on the support member 70a.
A plurality of (four in this embodiment) positioning holes 77 are fixedly provided on both sides of the upper surface of the central support member 70a at predetermined intervals along the front and rear directions c and d, and the positioning is performed. One also in the block 75 or the front-back direction c,
A plurality of (two in this embodiment) through holes 7 along d
8 are pierced. In FIG. 12, reference numeral 80 denotes a frame supporting abutting plate fixed to the center of the inner peripheral surface of the rotary frame 69 so as to face the positioning block 75.

According to the above configuration, FIG. 13 and FIG.
As shown in (a) to (c), the front-back direction c of the frame,
The positioning block 75 is slid in the front-rear directions c and d according to the widths R1 to R3 of d, and the grip portion 7 of the lock tool 79 is moved.
By inserting the lock shaft 79b with 9a into the predetermined positioning hole 77 and the through hole 78, the positioning block 75
After locking the support member 70a to the support member 70a.
By merely bringing the central portion of the frame 3 into contact with the positioning block 75, the central portion of the frame 3 can be reliably positioned and supported so as not to move unexpectedly (see FIG. 18). In FIG. 16, 79c is a lock shaft 79b.
It is a stopper ring detachably attached to the tip of the.

As shown in FIGS. 12 and 15, the supporting members 70b at the both ends are made of rectangular plate-shaped steel plates, and the rotary frame 6
One or a plurality of screw shafts 84a with a handle 84b slidably inserted in rectangular holes 83 formed along the left and right directions e and f between both end faces of 9 and end plates 82 fixed to the both end faces. Lock pieces 84 (two pieces in this embodiment) are provided on each end plate 82.

According to the above configuration, FIG. 13 and FIG.
As shown in (a) to (c), the horizontal direction e of the frame,
The support members 70b at both ends are slid in accordance with the widths H1 to H3 of f, and the handle 84b of the lock tool 84 is rotated to screw the screw shafts 84a into contact with the side faces of the respective support members 70b. , The support members 70
After locking b to both ends of the rotary frame 69, both sides of the frame 3 are simply placed on the upper surfaces of the respective support members 70b.
Both sides of the frame 3 can be supported so as not to move unexpectedly.

As shown in FIG. 12, support members 70 on both ends are provided.
Frame fitting recesses 86 are formed on the upper surface of b at predetermined intervals along the left and right directions e and f, and both side parts of the frame 3 are fitted by fitting both side parts of the frame 3 into the appropriate recesses 86. Can be reliably positioned so as not to move unexpectedly.

As shown in FIG. 19, each of the clamp devices 71 is of a hydraulic cylinder type and has a clamp shaft 71.
a is reciprocally rotated about its axis O between the clamp position C and the unclamp position D at α (90 ° in this embodiment), and at the clamp position C, the clamp shaft 71a is moved along the axis O thereof. The clamp shaft 71a is configured to extend and contract by a predetermined distance β, and a clamp lever 71b is detachably attached to the tip of the clamp shaft 71a by a fastener 88 such as a nut.

According to the above construction, as shown in FIGS. 17 and 18, the predetermined length L is set in accordance with the widths R1 to R3 in the front-rear directions c and d and the widths H1 to H3 in the left-right directions e and f.
The clamp levers 71b of 1 to L3 are fixedly attached to the clamp shaft 71a, and as shown in FIG.
By making the clamp lever 71b of No. 1 stand by at the unclamp position D, the frame 3 can be easily inserted into the recess 69a of the rotary frame 69 without being hindered by each clamp lever 71b. By driving each clamp device 71 from the state to rotate the clamp shaft 71a to the clamp position C side, each clamp lever 71b is pressed against the upper surface of the frame 3, and the frame 3 is reliably clamped to the rotating frame 69. be able to.

Explaining the reversing action of the frame reversing machine 30, the frame 3 is inserted into the recess 69a with the respective clamping devices 71 being unclamped (see FIG. 12), and the lower surface 3A of the frame 3 is supported by the supporting members 70a ,. Place it on 70b,
By driving each clamp device 71, the clamp lever 71b
Is pressed against the upper surface 3B of the frame 3 (see FIG.
4), and the frame 3 is clamped to the rotary frame 69 [see FIG. 20 (a)].

Then, as shown in FIG. 20 (b), the rotating frame 69 is half-turned to invert the frame 3 so that the lower surface 3A faces upward, and the caster is cast on the frame 3 from the lower surface 3A side. The wheel 4 is attached, the lower portion of the lift cylinder 5 is connected to the fixed frame 3e via the pin 6, and then the rotary frame 69 is rotated half a turn to rotate the frame 3 forward, as shown in FIG. 20 (c). Just turn it back to the original state.

According to the above structure, the frame 3 can be safely and efficiently reversed by the frame reversing machine 30, and the paint applied to the frame 3 is not peeled off at the time of the reversal so that the frame 3 can be repainted. It is unnecessary and, moreover, parts such as the caster wheel 4 and the lift cylinder 5 can be quickly and easily attached to the inverted frame 3 from the lower surface 3A side.

The connecting procedure of the fork 2b and the frame 3 will be described. In the state shown in FIG. 20 (c), the dolly 32 on which the fork 2b incorporating the components is placed is moved to the rear d and the frame reversing machine 30 is moved. As shown in FIG. 20 (d), the frame 3 being clamped is driven, and the loading platform elevating device 34 is driven to raise and lower the loading platform 32a, and the top plate portion 38 of the loading platform 32a is horizontally moved to move the forks. 2b
And the position of the frame 3 are adjusted, and each link 15, 1
The other end of 9 may be connected to each bracket 3c of the frame 3 via pins 22 and 23, and the tip of the piston rod of each lift cylinder 5 may be connected to each protruding frame 18 of the fork 2b via a pin 24.

According to the above construction, the connecting work between the fork 2b and the frame 3 can be performed safely and efficiently, and the paint applied to the fork 2b and the frame 3 may be peeled off during the connecting work. Since there is no need for repainting, cost reduction can be achieved.

In the above embodiment, as shown in FIG. 14, each supporting member 70 is adjusted to the height M1 of the frame 3.
The intervals between the clamp levers 71a, 70b and the clamp levers 71b are set. However, as shown in FIG. 21, when clamping the frame 3 having a low height M2, the clamp levers 7
The height adjustment block 89 may be detachably attached to 1b (another embodiment).

As shown in FIG. 22, a substantially T-shaped concave groove 89a is formed on the upper surface of the height adjusting block 89, and a pair of convex ridges 90 are formed on both side surfaces of the tip of the clamp lever 71b by the grooves 90a. It is formed, and both ridges 9
The height adjusting block 89 is attached to the clamp lever 71b by fitting the concave groove 89a into 0, and the screw shaft 91a of the lock tool 91 including a bolt or the like is inserted into the screw holes 92 penetrating both side surfaces of the height adjusting block 89. Screw it in and screw it 9
Recessed portion 9 in which the tip of 1a is formed substantially in the center of each protruding portion 90
The height adjustment block 8 by fitting it to 0b
9 is locked to the clamp lever 71b. Reference numeral 93 is a guide ball provided on the height adjustment block 89 and biased by a spring (not shown) to slightly project into the concave groove 89a.

According to the above configuration, the height M2 of the frame 3
Even if is small, by mounting the height adjusting block 89 on the clamp lever 71b, the frame 3 can be reliably clamped by the clamp lever 71b via the height adjusting block 89. In addition, the concave groove 89a of the height adjusting block 89 can be fitted into the pair of convex streak portions 90 of the clamp lever 71b, and the height adjusting block 89 can be reliably attached to the clamp lever 71b by the lock tool 91. The height adjustment block 89 can be easily removed from the clamp lever 71b only by unlocking the lock tool 91 from the clamped state and pulling the height adjustment block 89.

[0051]

According to the first aspect of the present invention, the frame is inserted into the concave portion of the rotary frame and placed on each support member, and the upper surface of the frame is pressed by each clamp device. Can be securely clamped to the rotating frame, and the frame can be safely and efficiently inverted by simply rotating the drive shaft half a turn in the clamped state, and parts can be quickly and easily attached to the inverted frame. At the same time, the paint applied to the frame is not peeled off at the time of reversing, and the coating cost is low because repainting is unnecessary.

According to the second aspect of the present invention, the positioning block disposed on the central support member is projected and retracted according to the width of the frame in the front-rear direction, and after the positioning block is locked to the support member by the locking tool, By merely bringing the central portion of the frame into contact with the support member and the positioning block, the central portion of the frame can be reliably positioned and supported so as not to move unexpectedly.

According to the third aspect of the present invention, the supporting members at both ends are projected and retracted according to the width of the frame in the left-right direction, and the supporting members are locked to both ends of the rotary frame by the locking tool, and then the respective supporting members are locked. By simply placing both sides of the frame on the upper surface of the frame, both sides of the frame can be supported so as not to move unexpectedly.

According to the fourth aspect of the present invention, the lower edges of the both side portions of the frame are fitted into the fitting recesses of the support members at both ends, so that the both side portions of the frame are reliably positioned so as not to move unexpectedly. can do.

According to the fifth aspect of the present invention, by holding the clamp levers fixed to the clamp shafts of the respective clamp devices at the unclamp position, the frame of the rotary frame is prevented from being disturbed by the respective clamp levers. It can be easily inserted into the recess, and by driving each clamp device from the unclamped state to rotate the clamp shaft to the clamp position side, each clamp lever is pressed against the upper surface of the frame, Can be reliably clamped to the rotating frame.

According to the sixth aspect of the present invention, even if the height of the frame is small, the height adjusting block is attached to the clamp lever, so that the frame is reliably clamped by the clamp lever via the height adjusting block. can do.

According to the invention described in claim 7, by simply fitting the concave groove of the height adjusting block to the pair of ridges of the clamp lever and locking the height adjusting block with the clamp lever by the locking tool, The height adjustment block can be securely attached to the clamp lever, and by simply unlocking the lock from the clamped state and pulling the height adjustment block, the height adjustment block can be easily removed from the clamp lever. It can be removed.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a lift truck assembling apparatus having a frame reversing machine according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the vehicle.

FIG. 3 is a plan view of the truck.

FIG. 4 is a partially cutaway front view of the vehicle.

FIG. 5 is a transverse cross-sectional view of a main part of the trolley.

FIG. 6 is a front view of the fork reversing machine.

FIG. 7 is a plan view of the fork reversing machine.

FIG. 8 is a front view of a main part of the fork inverting machine.

FIG. 9 is a plan view of the main part.

FIG. 10 is a side view of the main part.

FIG. 11A to FIG. 11D are explanatory views of the main part showing the procedure of reversing a narrow fork.

FIG. 12 is a perspective view of the frame inverting machine.

FIG. 13 is a plan view of the frame inverting machine.

FIG. 14 is a partially cutaway front view of the frame reversing machine.

FIG. 15 is a vertical sectional view of the frame reversing machine.

FIG. 16 is an exploded perspective view of the vicinity of the central support member.

17 (a) to 17 (c) are vertical cross-sectional views of essential parts showing a clamped state of frames having different widths in the front-rear direction.

18 (a) to (c) are vertical cross-sectional views of essential parts showing a clamped state of frames having different widths in the left-right direction.

FIG. 19 is a perspective view of the clamp device.

20 (a) to 20 (d) are schematic explanatory views showing a procedure of frame inversion and connection.

FIG. 21 is a front view of a frame reversing machine according to another embodiment of the present invention.

FIG. 22 is an exploded perspective view of the main part.

FIG. 23 is a side view of a lift truck.

FIG. 24 is a partially cutaway plan view of the lift truck.

25 (a) to (d) are schematic explanatory views showing a conventional lift reversal procedure.

26 (a) to 26 (d) are schematic explanatory views showing a conventional frame inversion and connection procedure.

[Explanation of symbols]

3 frames 30 frame reversing machine 68 Drive shaft 69 rotating frame 69a Recess of rotating frame 70a central support member 70b Support members at both ends 71 Clamp device 71a Clamp shaft 71b Clamp lever 75 Positioning block 79 Locking tool 84 Lock 86 Frame fitting recess 89 Height adjustment block 89a Height adjustment block concave groove 90 ridge 91 Locking tool c, d front-back direction e, f left and right direction

Claims (7)

[Claims] 1. A substantially U-shaped rotary frame projecting from the end of the drive shaft in a bifurcated manner along the axis of the drive shaft, and provided at the center of the inner peripheral surface and both ends of the inner peripheral surface of the rotary frame, respectively. Support members for supporting the lower surface of the frame inserted into the recess of the rotary frame, and pressing the upper surface of the frame inserted into the recess provided at the center of the upper surface and both ends of the upper surface of the rotary frame, respectively. And a clamp device for the lift truck frame reversing machine. 2. The center supporting member is fixed to the center of the inner peripheral surface of the rotary frame, and a positioning block is arranged on the upper surface of the supporting member so as to be retractable in a direction substantially parallel to the axis of the drive shaft. The lift truck frame reversing machine according to claim 1, further comprising: a lock tool that locks the positioning block at a predetermined position of the support member. 3. The support members at both ends are arranged at both ends of the rotary frame so as to be retractable and retractable along a direction substantially orthogonal to the axis of the drive shaft, and the support members are locked at both ends of the rotary frame. The lift truck frame reversing machine according to claim 1 or 2, further comprising: 4. The reversing machine for a lift truck frame according to claim 3, wherein the frame fitting recesses are formed on the upper surfaces of the support members at both ends. 5. Each of the clamp devices reciprocally rotates a clamp shaft between a clamp position and an unclamp position around its axis, and at the clamp position, expands and contracts the clamp shaft by a predetermined distance along the axis. 5. A hydraulic cylinder to be moved, and a clamp lever is detachably fixed to the tip of the clamp shaft.
A frame reversing machine for lift trucks according to any one of 1. 6. The reversing machine for a lift truck frame according to claim 5, wherein a height adjusting block is detachably attached to the clamp lever. 7. A substantially T-shaped groove is formed on the upper surface of the height adjusting block, and a pair of convex ridges is formed on both side surfaces of the tip of the clamp lever. 7. The lift truck frame according to claim 6, wherein the height adjusting block is attached to the clamp lever by fitting the concave groove, and the height adjusting block is locked to the clamp lever by a locking tool. Reversing machine.