JPH0477080B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to the use of an electrolytic coloring process or This is related to surface treatment transport cranes used for transporting over surface treatment tanks in automatic painting processes, etc., and is particularly used to lift and lower shapes suspended from the transport beam from one surface treatment tank to the next process surface treatment tank. This invention relates to a transport crane for surface treatment that has high speed and can also tilt its transport beam.

[Conventional technology]

For example, when applying alumite film treatment to long shapes for sash, several dozen surface treatment tanks are used in a series of lines for degreasing, pickling, anodizing, electrolytic coloring, clear electrodeposition coating, etc. The processing tanks are arranged in series or parallel in two rows in a U-shape, and the processing tanks are transported in a gate shape on parallel rails laid on both sides of the arranged processing tanks. The crane moves while suspending the sections.

A transport beam can be hung on the transport crane so that it can be raised and lowered, and a large number of long shapes are vertically suspended from the transport beam, and by raising and lowering the transport beam, the shape of the processing tank can be adjusted. The materials are leached and extracted, and a transport crane moves over the treatment tank to pass through a series of treatment steps. For example, see Utility Model Application Publication No. 51-14971 and Japanese Patent Application Publication No. 62-79120.

[Problem to be solved by the invention]

The above-mentioned conventional transport crane has a problem in that the speed of lifting and lowering of the transport beam is slow, which has been an impediment to speeding up the surface treatment process.

In addition, the long legs of the lifting rod were a problem in that they got in the way and restricted the three-dimensional arrangement with structures around the tank.

In view of the above-mentioned problems, this invention can increase processing efficiency by increasing the lifting and lowering speed of the conveying beam,
It was developed with the aim of providing a transport crane for surface treatment that is not constrained by the three-dimensional arrangement with structures around the tank and can hold the transport beam at an angle for horizontally suspended liquid draining. It is something.

[Means to solve the problem]

As a means for solving the above-mentioned problems, the present invention provides a transportation crane that can travel on parallel rails, in which crane fixing frames are vertically provided symmetrically on both sides of the crane, and elevating and lowering frames are installed in each of the crane fixing frames. It is constructed as a surface treatment transport crane in which a beam pedestal is freely disposed within the elevating frame and is movable up and down.

[Effect]

The present invention, which is constructed in two stages as described above, has the following effects.

The parallel rails are installed at a predetermined height (for example, 5 mm above the tank) on both sides of the processing tank row. The transport crane has a pair of chassis on both sides of the machine and runs along parallel rails so as to straddle the processing tank. Close to the chassis,
A pair of crane fixing frames are installed perpendicularly to the machine platform.
The area directly below each crane fixing frame is spaced outward from the upper edge of the processing tank by a predetermined distance (for example, 30 to 40 cm). The length of the elevating frame, which is movably disposed within the crane fixed frame, is, for example, 1.5 m to 20 m, and is raised and lowered within the crane frame by a hoisting winch.

The beam pedestal within the elevating frame is raised and lowered by a hoisting wire that separately raises and lowers the beam pedestal.

When the speed at which the beam cradle moves up and down within the lifting frame is configured to be faster than the speed at which the lifting frame moves up and down within the fixed crane frame, when the beam cradle reaches the upper end of the lifting frame from the bottom of the lifting frame, The upper part reaches from the bottom of the crane fixing frame to the upper end. Therefore, the beam pedestal can be raised from the lower end of the lifting frame to the upper end of the crane fixing frame in half the time (double the speed) at the same height as a conventional crane.

In addition, if the raised positions of both beam supports that support both ends of the conveyance beam are made different in height, the conveyance beam can be tilted in its longitudinal direction, and the horizontally suspended material can be drained.

〔Example〕

An embodiment of the present invention will be described based on the drawings. FIG. 1 is a front view showing a partially broken surface of the transport crane, FIG. 2 is a plan view, and FIG. 3 is a left side view of the beam lifting mechanism on the right side in FIG.
Since the elevating mechanism is symmetrical, some parts will be omitted from illustration of one side and from the following description.

Before describing the transport crane in detail, the relation to the surface treatment tank 30 will be explained.

In FIG. 1, a large number of surface treatment tanks 30 are arranged in series in the front-rear direction on the ground G. The size of the surface treatment tank 30 differs depending on each treatment process.

On both sides of the surface treatment tank 30, there is a predetermined interval, for example.
Supports 31... are erected at 1m intervals, and these supports 31... are either dedicated or use the supports of the factory building, and multiple pillars are arranged in series at predetermined intervals in the front-rear direction in Figure 2. has been done.

Support stands 32, 32, which are long in the front and back direction, are horizontally disposed on the upper portions of the pillars 31, 31 on both sides, and running rails 33, 33 of the transport crane are parallel to the support stands 32, 32, respectively. It is laid out so that.

The height of the rails 33, 33 is, for example, a little over 4 m from the upper end surface of the surface treatment tank 30.

However, in FIG. 1, the surface treatment tank 30
A surface treatment transport crane 1 is disposed so as to be able to move forward and backward on a pair of rails 33, 33, straddling the group.

The surface treatment transport crane 1 has a horizontally long machine platform 3 having a pair of chassis 2, 2 at both left and right ends in the figure, and a pair of beam lifting mechanisms 4, 4 are disposed at both end edges of the chassis 2. , 2 with both frames attached to the rail 3.
3, 33 and run.

The chassis 2, 2 have a plurality of flanged wheels 2A along the longitudinal direction at the bottom of a long frame 2B.
..., and a machine platform 3 is installed between both chassis 2, 2.

The machine base 3 has a horizontally long space 3A formed in the center of the plane in the front-rear direction.

At both left and right ends of the space 3A, beam lifting mechanisms 4, 4 are installed so as to be close to the chassis 2, 2.
is installed.

The upper surface of the machine base 3 is formed flat, and as shown in FIGS. 1 and 2, wheel drive mechanisms 5, 5 are mounted on the upper surface.
and crane drive mechanisms 6, 6 are arranged symmetrically in the front and rear. Reference numeral 7 in the figure is a control panel.

In the wheel drive mechanisms 5, 5, a clutch 5B and a speed reduction mechanism 5C are interposed between a motor 5A and a drive shaft 5D, and a chain 5F mounted on a sprocket 5E attached to the tip of the drive shaft 5D is connected to a wheel. 2A
It is wound around a sprocket 2D attached to a drive shaft 2C. The motor 5A, the clutch 5B,
The speed reduction mechanism 5C and the like are automatically controlled via the control panel 7.

The crane drive mechanism 6 includes a clutch 6B and a speed reduction mechanism 6C interposed between a drive shaft 6D connected to the drive shaft 8A of the winch 8 and a motor 6A.

The motor 6A, clutch 6B, reduction mechanism 6C, etc. are also automatically controlled via the control panel 7.

As clearly shown in FIG. 3, the beam lifting mechanisms 4, 4 have a crane fixing frame 9 vertically fixed to the machine base 3 and a lifting car 10 on the top, and can be freely raised and lowered within the crane fixing frame 9. Lifting frame 11 and Lifting frame 1
1, a winch 8 that raises and lowers the elevating frame 11 and the beam pedestal 12, and a high-speed lifting means 34 that raises the beam pedestal 12 at high speed.

As shown in the side view in FIG. 3, the crane fixing frame 9 is framed in a gate shape by a pair of front and rear guide columns 9A, 9A and a sheave case 9B fixed to the upper part. The height is, for example, 3.4 m, and the front and back width is approximately 1.2 m, and is fixed to the machine base 3 so that the approximately middle part of the height is at the intersection with the rails 2A, 2A.

The guide columns 9A, 9A have a substantially rectangular cylindrical shape in cross section as shown in FIGS. 5 and 6, and the left and right walls extend in opposite directions on opposite sides of the guide columns 9A, 9A. Guide walls 9C, 9C, . . . are formed in this manner.

The outer wall surface of the rectangular cylinder between the two guide walls 9C, 9C is configured as guide surfaces 9D, 9D. Further, the inner cavity of the rectangular cylinder is configured as weight cavities 9E, 9E.

A part of the sheave case 9B is attached to the winch 8.
It extends into the sky zone and is shaped like a horizontal rectangular cylinder. As shown in FIG. 4, inside the sheave case 9B, from the winch 8 side, a winding sheave 13A, a weight sheave 13D, a lifting frame sheave 13C, a lifting frame sheave 13C, and a weight sheave 13E.
are arranged horizontally so that the shafts 13F are perpendicular to the longitudinal direction of the sheave case 9B.

As shown in FIG. 3, the tip of the winch wire 14A wound around the lifting frame sheave 13D and the winding sheave 13A is connected to the upper part of the lifting car 10 of the lifting frame 11, and the rear end of the wire 14A is connected to the winding sheave 13A. Take sheave 13
A is connected to the weight 15 in the weight cavity 9E via the guide sheaves 8B and 8C of the winch 8, and the weight sheave 13B on the winch side.

Also, weight sheave 13E and lifting frame sheave 1
The other winch wire 14B mounted on 3C is
Its tip end is connected to the upper part of the elevator car 10, and its base end is connected to the weight 15.

With the above configuration, when the winch 8 is hoisted, the beam pedestal 12 and the lifting frame 1 are placed in the state shown in FIG.
1 rises at a constant speed, and both weights 15, 15 descend through the weight cavity 9E.

The elevator vehicle 10 of the elevator frame 11 has a frame mounted on both ends of the upper plate portion 10A having a rectangular shape.
It is formed into a gate shape with 0B hanging down, and both frames 10B,
Guide wheels 16 and 17, which are disposed at right angles to each other, are pivotally mounted on the upper and lower surfaces of each of the guide wheels 10B.

However, one of the guide wheels 16... is the guide column 9.
The guide wheels 17 slide on the guide walls 9C, 9C, . . . in A, and the other guide wheels 17 slide on the guide surfaces 9D.

Hanging shafts 10C, 10C are installed horizontally on the bracket on the lower surface of the upper plate 10A of the elevator car, with the axial direction facing the front-rear direction (left and right in FIG. 3). Bearing parts 11A, 11A formed on the upper surface of 11 are pivotally attached. Therefore, the elevator car 10 moves vertically up and down along the guide column 9, and the elevator frame 11 is suspended by the elevator car 10 and goes up and down vertically, and the lower part is connected to the longitudinal axis of the machine platform 3 using the suspension shafts 10C, 10C as fulcrums. can be swung in any direction.

As shown in the side view in FIG. 3, the lifting frame 11 has upper plates 11 at the upper and lower ends of the front and rear lifting rods 11B,
C and a lower plate 11D are provided to form a vertically long rectangular frame.

The opposing back surfaces of both the lifting rods 11B, 11B are the sixth
As shown in the figure, guide wheels 18 of the beam cradle, which will be described later as guide surfaces 11E and 11E, slide. In addition, guide walls 11F, 1 perpendicular to the guide surfaces 11E, 11E are provided at the left and right ends of both the lifting rods 11B, 11B.
1F... has been formed. The guide wall 11F, 1
A beam pedestal 12 is disposed between both lifting rods 11B, 11B so that it can be raised and lowered in such a manner that guide wheels 19 of the beam pedestal, which will be described later on 1F, slide.

At the top of the elevator vehicle 10 and the elevator frame 11, a first
As shown in the figure and FIG. 4, protrusions 22 and 23 are formed on the opposing surfaces of the left and right elevator cars, respectively, and a spring shaft 24 is loosely fitted between the upper and lower protrusions 22 and 23, and the spring shaft 24 has a spiral The spring 25 is compressed to maintain the vertical position of the elevator frame 11 during normal operation, and to
It is possible to swing in the longitudinal direction.

Further, the high-speed raising means 34 fixes one end of the hoisting wire 10E delivered to the hoisting sheave 10D to the chassis 12A, and the other end is attached to a fixture 35 provided at the lower end of the shaft 9A.
formed by fixing to.

That is, the hoisting sheave 10D is pivotally attached to the left or right edge of the lower part of the upper plate 10A of both the elevator cars 10, 10. The base end of the hoisting wire 10E mounted on the hoisting sheave 10D is connected to the elevator cars 10, 10.
It is fixed to a fixture 35 on the outer crane fixing frame 9, and the other end passes through the inside of the elevating frame 11 and is connected to the beam pedestal 12.

The beam pedestal 12 has guide wheels 18...19 disposed on the front and rear surfaces (left and right in FIG. 3) of the chassis 12A, with the former axis 18A horizontally oriented in the left-right direction and the latter axis 19A horizontally oriented in the front-rear direction. ing. Therefore, one of the guide wheels 18... is the guide surface 11E, 11E.
The other guide wheel 19... is the guide wall 11.
It is configured to ski on F and 11F.

Further, on one side of the chassis 12A, that is, on the opposite side of both beam lifting mechanisms 9, 9, a support plate 12B that is long in the front and back direction is fixed horizontally, and on the opposite side of both support plates 12B. Two pairs of beam receiving arms 12C, 12C, . . . are provided to protrude horizontally. However, between the pair of beam receiving arms 12C and 12C, the sixth
As shown in the figure, the locking rods 20A, 20A protruding from the tip edge of the transport beam 20 are received therein.

In this invention configured as above,
In the state shown in FIGS. 1 and 2, the beam receiving arm 12
Attach both ends of the conveyor beam 20 to C and 12C using the locking rods 2.
Since it is possible to suspend the profile 27 via the 0A and 20A, the profile 27 can be suspended vertically from the profile fixing device 21 attached to the lower part of the conveyor beam 20, and the profile 27 can be placed in the surface treatment tank 30. As soon as the predetermined surface treatment is completed by dipping, the winch 8 is hoisted up and operated, and the elevator frame 11 is raised as the elevator car 10 is raised. Furthermore, since the hoisting sheave 10D also rises as the elevator car 10 rises, the hoisting wire 10E mounted on the hoisting sheave 10D has its base end fixed to the fixture 35 and its tip end. Since the beam pedestal 12 is suspended, the elevator car 10 will raise the beam pedestal 12 at twice the lifting speed of itself. At the same time, the beam pedestal 12 has reached the upper part of the elevator car 10. Therefore, compared to the conventional system in which the distance the beam pedestal moves up and down is the same and the winding speed of the winch is the same, the lifting speed of the beam pedestal 12 in the present invention is approximately twice as fast.

Further, since the lifting frame 11 is pivotally attached to the lifting car 10 via the hanging shafts 10C, 10C, the lifting shafts 10
C... can be swung using the fulcrum as a fulcrum, and after stopping the raising of one, by raising the other, a height difference is created between the heights of the left and right beam pedestals 12, 12, and then the whole is moved as it is. By adopting an operating method such as raising the conveyor beam 20, the conveyor beam 20 can be tilted as shown by the imaginary line 20' in FIG.
Can drain liquid from items suspended horizontally. Reference numeral 26 in FIG. 1 is a remote control switch for manual operations such as traveling of the crane and lifting and lowering of the beam.

Note that the present invention is not limited to the above embodiments, and the design can be changed as appropriate. For example, a position sensor for checking the vertical position of the beam pedestal can be appropriately provided on the machine base 3.

Also, in the high-speed raising means 34, the beam pedestal 12
The proximal end of the hoisting wire 10E can be connected to a small motor (winch) to enable high-speed hoisting separately from the connection to the fixture 35.

Furthermore, two or more crane fixing frames 4 may be arranged along the traveling direction of the chassis 2.

〔Effect of the invention〕

This invention configured as described above has the following excellent effects.

(b) Since the elevator is configured to go up and down at almost the same height as the crane fixed frame, when the elevator frame is raised, there is more space between the crane fixed frame and the processing tank below, which is shorter than in the conventional method. Since a space is created, there is an effect that restrictions on the three-dimensional arrangement with structures around the processing tank are reduced.

(b) By making the beam pedestal movable up and down along the elevator and making the rising speed of the beam cradle faster than the rising speed of the lifting frame, the speed at which the beam cradle reaches the top of the crane fixing frame can be reduced compared to the conventional one. This makes it possible to achieve a speed equivalent to twice that of the previous one, and has the effect of significantly shortening the lifting and transporting times.

(c) By making one of the pair of beam pedestals different in height, the beam can be tilted and the liquid can be drained in a short time.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, in which Fig. 1 is a front view showing a partially broken surface of a conveyor crane for surface treatment, Fig. 2 is a plan view, Fig. 3 is a side view of the beam lifting mechanism, and Fig. 4 is a side view of the beam lifting mechanism. The figure is a side view of the high-speed lifting means for lifting and lowering the beam pedestal at high speed, and Figure 5 is A in Figure 3.
- A sectional view, and FIG. 6 is a BB sectional view in FIG. 3. 1... Transport crane for surface treatment, 2... Vehicle platform,
2A...Wheel, 3...Machine base, 4...Beam lifting mechanism, 5...Wheel drive mechanism, 6...Crane drive mechanism, 7...Control panel, 8...Winch, 9...Crane fixing frame, 9A... Guide pillar, 9B... Sheave case, 9C... Guide wall, 9D... Guide surface,
9E... Weight cavity, 10... Lifting car, 10A...
...Top plate, 10B...Vertical frame body, 10C...Hanging shaft, 1
0D...Hoisting sheave, 10E...Hoisting wire, 1
1... Elevating frame, 11A... Bearing, 11B... Elevating rod, 11C... Upper plate, 11D... Lower plate, 11E...
...Guide surface, 11F...Guide wall, 12...Beam cradle, 12A...Car chassis, 12B...Support plate, 1
2C... Beam receiving arm, 13A-13E... Sheave, 13F... Shaft, 14A-14B... Winch wire, 15... Weight, 16, 17, 18,
19... Guide wheel, 16A, 17A, 18A, 19
A...Axis, 20...Transportation beam, 20A...Latching rod, 21...Shape fixture, 22, 23...Protrusion, 24...Spring shaft, 25...Spring, 26...Remote control switch , 27... Profile, 30... Surface treatment tank, 31... Support column, 33... Rail, 34...
High-speed raising means, 35...Fixing device.

Claims (1)

[Scope of Claims] 1. A beam lifting mechanism is arranged symmetrically on both sides of a transport crane that runs on its own along parallel rails, and the lifting frame is installed within a vertically fixed crane fixing frame. A conveyance crane for surface treatment, characterized in that it is movable up and down, and further has a beam pedestal disposed in the elevating frame so as to be movable up and down. 2 The beam pedestal is approximately 2 times faster than the lifting speed of the lifting frame.
2. The surface treatment transport crane according to claim 1, further comprising a high-speed lifting means for lifting at twice the speed.