JPH0824742A - Transport hanger - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] A pair of chains connected to a jig that holds the work is wound around the sprocket of the hoist equipped with the hanger body, and the jig is moved up and down on the hanger body. In a hanger that is freely hung, the chain entanglement and kinks are prevented from occurring in the surplus portion of the chain that hangs from the sprocket, and the unbalance in the elongation of the pair of chains is automatically corrected. Don't let your attitude go wrong. [Structure] A pair of guide pulleys 12L and 12R, a fixed pulley 14, and a chain holding portion 10 ₁ of the hanger body,
A pair of movable pulleys 16L, 1L biased by the biasing means 17
And 6R. The surplus portion of the pair of chains 7L ₁ and 7R ₁ hanging from the sprocket 6a of the hoisting machine 6 ₁ is guided to the fixed pulley 14 via the guide pulley and the movable pulley. The ends of the excess portions of both chains are connected to each other, and this connecting portion is wound around the fixed pulley.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment facility for carrying out a surface treatment mainly by immersing a work in a treatment tank, which comprises a jig for holding a work such as an automobile body suspended up and down on a hanger body. Conveying hangers used in.

[0002]

2. Description of the Related Art Conventionally, as a hanger of this type, a hoisting machine is mounted on a hanger body, and a pair of chains connected to a jig is wound around a sprocket provided in the hoisting machine to chain the hanger body. It is known that a jig is hung by means of a winder to raise and lower the jig by a winding operation and a feeding operation of a hoisting machine (see Japanese Patent Laid-Open No. 3-178358). In this structure, the excess portion of the chain that hangs from the sprocket during the winding operation of the hoist is housed in the chain box provided in the hanger body.

[0003]

SUMMARY OF THE INVENTION In the above, the chain is entangled in the chain box so that the chain cannot be smoothly pulled out from the chain box when the hoisting machine is unreeled, or a kink portion is formed on the chain, which makes it difficult to work with the sprocket. It may not mesh. Also, if the chain stretches during use and both chains are stretched evenly in this case, there is no problem, but if the stretch of both chains is uneven, the jig posture will change, so it is necessary to adjust the chain length. Therefore, maintenance is troublesome. In view of the above points, the present invention prevents entanglement and kinking of an excess portion of a chain so that a jig can be smoothly moved up and down, and an unbalance of elongation of a pair of chains can be automatically corrected. Its purpose is to provide a transport hanger that has

[0004]

In order to achieve the above object,
The present invention includes a hanger main body and a jig for holding a work, a hoisting machine is mounted on the hanger main body, and a pair of chains connected to the jig are wound around a sprocket provided in the hoisting machine. In a transfer hanger in which a jig is hung up and down on a hanger body via a chain, a fixed pulley pivotally supported on the hanger body at a fixed position of the hanger body and A pair of movable pulleys and an urging means for urging the movable pulleys in a direction separating from the fixed pulleys are provided, and the excess portion of the chains hanging from the sprocket of the hoisting machine is fixed pulleys through the movable pulleys. It is characterized in that the ends of the excess portions of both chains are connected to each other while being guided to the side, and this connecting portion is wound around a fixed pulley.

[0005]

[Operation] The excess portion of the chain is held on the hanger body with tension applied by the urging force of the movable roller,
The entanglement of the chain and the occurrence of kinks are prevented. Thus,
The jig can be smoothly moved up and down without causing a poor meshing of the chain with the sprocket of the hoisting machine. Also, when the pair of chains are stretched unevenly, the fixed rollers rotate under the action of tension by the urging force of the movable rollers, and the chains are pulled from the side with the greatest elongation to the side with the least amount of elongation. Are automatically corrected to be uniform.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, reference numeral 1 denotes a hanger main body, and a jig 2 for holding an automobile body W, which is a work, is suspended from the hanger main body 1 via a chain as will be described later.

The hanger body 1 is a pair of left and right rails 3, which are arranged along the surface treatment line of the vehicle body and are long in the front-rear direction.
The hanger body 1 is suspended in three, and in detail, the hanger body 1 is provided in a left-right pair on a lower frame 1a that is long in the left-right direction, and a gate-shaped upper frame 1b that extends over both front and rear sides of the lower frame 1a. The pair of front and rear roller units 1c, 1c attached to the upper end of each upper frame 1b hangs the hanger main body 1 rotatably on each rail 3, and at the same time, the upper frame 1b is mounted on the rail 3. The drive unit 1d that travels along is connected, and the hanger body 1 is allowed to travel along the rail 3 by itself.

The jig 2 is formed longitudinally in the left-right direction so that the vehicle body W can be held sideways.
A pair of rotating wheels 4 located on the same axis at both left and right ends of the
L and 4R were fixed. Then, a pair of chain locking members 5 ₁ and 5 ₂ are attached to both sides around each of the rotating wheels 4L and 4R, and a pair of front and rear hoisting machines 6 ₁ and 6 ₂ are attached to one upper frame 1b of the hanger body 1. mounted, both times driving wheel 4L, engaged at one end to the side of the locking member 5 ₁ after 4R, two rotary wheels 4L,
A pair of chains 7 led out from the front side of 4R
L _1, 7R ₁ to the front side of the guide pulley 8L _1, 8R ₁ provided on the left and right ends of the lower frame 1a of the hanger body 1, the guide pulley 9 L ₁ provided at a position immediately below the front of the hoisting machine 6 _1,
9R ₁ and two sprocket 6a provided in the hoisting machine 6 ₁ and wound in the same manner. Similarly, one end is locked by the locking member 5 ₂ on the front side of both rotating wheels 4L and 4R. Driving wheels 4L, 4R
A pair of chains 7L ₂ and 7 led out upward from the rear side
Guide pulley 9 L ₂ to the side of the guide pulley 8L _2, 8R ₂ after providing the left and right end portions, provided at a position directly below the hoisting machine 6 ₂ of the rear of the R ₂ lower frame 1a of the hanger body 1, 9R ₂
It was wound on two sprockets provided in the hoisting machine 6 ₂ via.

Thus, by rotating both the hoisting machines 6 ₁ and 6 ₂ in the winding direction or the unwinding direction, the jig 2 is lifted and lowered in a fixed posture, and the two hoisting machines 6 ₁ and 6 ₂ are also moved. When the two are rotated in the opposite directions, the jig 2 rotates about the axes of the two rotation wheels 4L and 4R, and the vehicle body W takes a sideways posture. Then, the hanger body 1 is stopped at a position immediately above a predetermined processing tank (not shown) for chemical conversion treatment or electrodeposition coating arranged on the surface treatment line of the vehicle body, and the jig 2 is lowered to treat the vehicle body W with the processing tank. After that, the jig 2 is rotated to apply the surface treatment to the vehicle body W evenly, and after the treatment, the jig 2 is raised to take out the vehicle body W, and the hanger body 1 is moved to remove the vehicle body W. Transfer to the next processing tank.

On the front side of the lower frame 1a of the hanger body 1, as shown in FIG. 3, a chain holding means for holding an excess portion of a pair of chains 7L ₁ and 7R ₁ hanging from the sprockets of the front hoisting machine 6 _1. The portion 10 ₁ is provided, and the rear side hoisting machine 6 ₂ is also similarly provided at the rear side portion of the lower frame 1 a.
A pair of chains 7L ₂ , hanging from the sprocket
A chain holding portion 10 ₂ for holding a surplus portion of 7R ₂ is provided. Both holding parts 10 ₁ and 10 ₂ have the same structure. The structure of the front chain holding part 10 ₁ will be described, and the description of the rear chain holding part 10 ₂ will be omitted.

The chain holding portion 10 ₁ has a structure shown in FIGS.
As shown in FIG. 3, rail members 11 having a U-shaped cross section extending leftward from the lower position of the hoisting machine 6 ₁ are arranged to face each other in a front-rear pair. While supporting a pair of guide pulleys 12L and 12R on the
A bracket 13 that straddles both rail members 11, 11 is attached to a portion of both rail members 11, 11 near the base end, a fixed pulley 14 is pivotally supported on the bracket 13, and the rail members 11, 11 are engaged with each other. A movable frame 15 having a matching roller 15a is provided between the rail members 11 and 11, and a pair of movable pulleys 16L and 16R are pivotally supported on the movable frame 15 to form a double sprocket 6a of the hoisting machine 6 _1. The excess portions of the pair of chains 7L ₁ and 7R ₁ hanging from the guide pulley 1
2L, 12R and movable pulleys 16L, 16R are guided to the fixed pulley 14, the ends of the surplus portions of both chains 7L ₁ , 7R ₂ are connected to each other, and this connecting portion is provided on the bracket 13 It was wound around the fixed pulley 14 via the guide 17.

Then, a winder 18 as an urging means having a built-in winding drum urged by a spiral spring is attached to the tip ends of both rail members 11, 11, and a wire 18a is wound around the winding drum. Is pulled out from the winder 18 to move the movable frame 1
5, the movable pulleys 16L and 16R are connected to the fixed pulley 1
The winder 18 is urged in a direction away from No. 4.

According to the above construction, the chains 7L ₁ , 7
The surplus portion of R ₁ is moved to the chain holding portion 10 ₁ by the movable pulley 16
Since the chains 7L ₁ and 7R ₁ are prevented from being entangled or kinked by being urged by the urging forces of the L and 16R, the chains 7L ₁ and 7R ₁ are prevented from being entangled and kinked, and the chains 7L ₁ and 7R ₁ are favorably attached to the sprocket 6a. Mesh with each other. The same applies to the chains 7L ₂ and 7R ₂ held by the chain holding portion 10 ₂ on the rear side, and the jig 2 is smoothly moved up and down and rotated by the operation of the hoisting machines 6 ₁ and 6 ₂ . Also, one of both chains 7L ₁ and 7R ₁ ,
For example, when the chain 7L ₁ is stretched, the fixed pulley 14 rotates clockwise in FIG. 4 under the action of tension by the urging force of the movable pulleys 16L and 16R so that the chain 7L ₁ is stretched on the chain 7R ₁ side. The chain is pulled in, and the elongations of both chains 7L ₁ and 7R ₁ are automatically equalized. Therefore, there is no problem that the jig 2 is tilted to the left or right due to the uneven elongation of both chains 7L ₁ and 7R ₁ .

In the above embodiment, the jig 2 is suspended from the hanger body 1 so that it can be raised and lowered and rotated. However, the jig is suspended from the hanger body via a pair of chains connected to both ends of the jig. The present invention can also be applied to a hanger in which both chains are wound around a sprocket of a common hoist mounted on the hanger body and the jig is simply moved up and down.

[0015]

As is apparent from the above description, according to the present invention, it is possible to prevent chain entanglement and kink,
The jig can be smoothly moved up and down by properly engaging the chain with the sprocket of the hoisting machine, and the unbalance in the elongation of the pair of chains can be automatically corrected. It is easy to maintain without causing any error.

[Brief description of drawings]

FIG. 1 is a front view of an example of a hanger of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a plan view of the hanger body viewed from the line III-III in FIG.

FIG. 4 is an enlarged plan view of a main part.

FIG. 5 is an enlarged front view of the main part.

[Explanation of symbols]

1 Hanger body 2 Jig 6 ₁ , 6 ₂ Hoisting machine 6a Sprocket 7L ₁ , 7R ₁ , 7L ₂ , 7R ₂ Chain 14 Fixed pulley 16L, 16R
Movable pulley 8 Winder (biasing means)

Claims (1)

[Claims] 1. A hanger main body and a jig for holding a work, a hoisting machine is mounted on the hanger main body, and a pair of chains connected to the jig are wound around a sprocket provided in the hoisting machine. In a transfer hanger in which a jig is hung up and down via a chain on a hanger body, a fixed pulley pivotally supported on the hanger body at a fixed position on the hanger body and a fixed pulley that can be freely moved toward and away from the fixed pulley. A pair of movable pulleys and an urging means for urging the movable pulleys in a direction away from the fixed pulleys are provided, and an excessive portion of the chains hanging from the sprocket of the hoisting machine is fixed through the movable pulleys. A transport hanger characterized in that, while being guided to the pulley side, the ends of the excess parts of both chains are connected to each other, and this connecting part is wound around a fixed pulley.