JPH04358049A - Hot-dip coating apparatus - Google Patents

Abstract

PURPOSE:To enable continuous hot-dip coating on materials to be plated requiring dripping-cut by turning over while holding plural materials and to improve safety of the work because heavy labor load to a worker is eliminated and skillness of the work is obviated. CONSTITUTION:This apparatus is composed of a rotary holding device 9, by which a holding tool 8 fitting the material to be plated as rotatably can be held and rotated and also can be carried to the optional position, and a hot bath dipping device 4, by which the hot bath dipping is executed by carrying the holding tool 8. The hot dipping device 4 sets carrying rail at level, which can dip by loading the holding tool 8 fitted to hood wall along the hot bath vessel 2 and a guide shaft, which can reciprocate with an actuator of hydraulic cylinder, etc., in parallel to this carrying rail, and a pressing plate, which can press only to one direction, is fitted to this guide plate and by intermittently pressing the holding tool on the carrying rail, the materials to be plated can be shifted in the hot bath.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a continuous type general hot-dip metal plating device with good sagging, and more particularly, to a device having an annular portion at one end like a branch rod for a telephone pole, and furthermore, The present invention relates to a general hot-dip galvanizing device suitable for rod-shaped materials, which is combined with attached fittings.

When installing a utility pole above ground, one end of the wire rope is attached to the utility pole, and the other end of the wire rope and the end of the anchor buried underground are connected to a branch rod as shown in FIG. 7 may be used to connect. This branch rod 7
is mainly made of round steel bars with diameters of 9, 13, 16, 19, and 22 mm, and has an annular portion 7a with both ends forming perpendicular surfaces,
7b, and these annular portions 7a, 7b are combined with attachment fittings such as a simple link 16 or a strap 17, and are entirely hot-dip galvanized for rust prevention.

By the way, regarding this branch line rod 7, since the utility pole on which this branch line rod 7 is used is installed near roads and houses, for the safety of passersby and residents, do not use molten zinc during plating. Protrusions caused by sauce are strictly prohibited, and
Uneven dimensions due to dripping of the plated zinc may cause problems in connecting with other parts. Furthermore, the branch rod 7
If the attached fittings such as the simple links 16 combined with the annular parts 7a and 7b are fixed to the branch rod 7 with plated zinc, the plated zinc will be peeled off at the fixed part during connection work, resulting in There were problems such as loss of rust effect. That is, in the case of branch rods, there are restrictions on dripping and cooling of the plated zinc, so in the hot-dip galvanizing operation, it was necessary to effectively drip the plated zinc in a short time.

Conventionally, in the hot-dip galvanizing of such branch rods, for example, a set of two workers each operated and held an iron rod called a needle with a length of about 2 m, which had a bent part in the middle. The work involved transporting the metal, immersing it in a plating bath, and then pulling it out and cutting off the drippings.

That is, the plurality of branch rods 7 that have been pretreated are
One worker holds the iron rod at the annular portion 7 on the simple ring side.
a, and the other worker inserts the annular part 7b on the strap side.
It is immersed in a plating bath with the vicinity of it supported from below by the iron rod.

The branch rod 7 that has been lifted from the plating bath is turned over on the work floor outside the plating bath, and in the process of turning over, the plating is cut off, and the branch rod 7 is supported and carried by two people and placed in a cooling water tank, where it is plated. The coating was allowed to completely solidify.

[0007]

[Problem to be Solved by the Invention] However, this work requires two workers to operate the iron bar, and a total of 20 to 30 kilometres.
The work involves lifting multiple branch rods made up of 3.5 g as a set, performing the short-time sagging operation as described above, and transporting them.It is quite hard work for the workers, and it is difficult to maintain balance in height. The problem was that the work was carried out by two workers working in unison, which was both dangerous and required skill. Therefore, in such hot-dip galvanizing, there is a problem in that the work tends to be intermittent and it is difficult to improve workability and promote labor saving.

Furthermore, if some kind of mechanized plating bath immersion equipment is to be installed, and the plating bath immersion equipment is complex and fixed equipment, the attached plating bath will have to be dedicated. There is a problem in that if the production volume of the material to be plated is small, it will be economically disadvantageous.

In view of these problems, the present invention incorporates mechanized work into general hot-dip metal plating work, makes it automatic or semi-automatic work, has an annular part at the end like the branch rod, and has attached parts. Even if it is a heavy object consisting of multiple rod-shaped objects that require inverted slope cutting in combination with metal fittings, the necessary plating can be cut without manual handling, and unnecessary caking between parts can be prevented. Therefore, it is an economical hot-dip metal plating device that maintains work safety and improves workability without requiring any skill, and is also simple in terms of equipment and can be used over the plating bath when not needed. The purpose of the present invention is to provide an economical hot-dip metal plating device equipped with a plating bath immersion device that can be easily transferred from the factory.

0010

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a clamp part that can rotate by gripping a holder holding a material to be plated, and makes the clamp part movable. A hot-dip plating apparatus comprising a rotary gripping device and a plating bath immersion device capable of charging and immersing the material to be plated, which is attached and held in the holder, into a plating bath, the plating bath immersion device A transport rail for holding the holder at a level that allows the plating material to be immersed in the plating bath is provided above the plating bath, and a guide shaft with an actuator connected to the base end is provided in parallel with the transport rail, A push plate that can be pushed in only one direction is attached to a plurality of predetermined locations on the guide shaft, and as the guide shaft is reciprocated by driving the actuator, the push plate pushes the holder on the conveyance rail in one direction. A hot-dip plating device that moves the material to be plated in a plating bath.
The holder is a holder for attaching and holding a rod-shaped material to be plated having an annular portion at one end, and the holder is a single horizontal rod that holds one end of the material to be plated by loosely inserting it into the annular portion. , a holding member consisting of two parallel horizontal bars that hold the other ends of the material to be plated by loosely inserting them into each other, is attached to a gripping plate spaced apart above the holding member and equipped with a support wheel on the upper part; Furthermore, the plating bath immersion device has a plurality of brackets attached to a hood provided along the plating bath, and each bracket rotatably holds an arm formed on a frame body. At the same time, temporarily fixing the arm and the bracket with a locking pin at a position where the arm is perpendicular to the longitudinal direction of the plating bath, allowing the arm to pivotally hold the transport rail and the guide shaft, The present invention proposes a hot-dip plating apparatus in which the guide shaft is connected to an actuator via a fitting, and by removing the locking pin and the fitting, the apparatus can be stored on one side in the hood.

[0011]

[Operation] In this hot-dip plating equipment, after the material to be plated is mounted on the holder and held, this holder is gripped by the clamp part of the rotary gripping device and transported, and then supplied to the transport rail of the plating bath immersion equipment. and hold it. When an actuator such as a hydraulic cylinder is driven to reciprocate the guide shaft, a push plate attached to the guide shaft pushes the holder held on the transport rail to move it forward. During this process, the material to be plated is immersed in the plating bath and plated. The holder that has been moved the required distance is gripped by the clamp part of the rotary gripping device, carried out outside the plating bath, rotated to cut off the plating on the material to be plated, and then transported to the cooling water tank.
Place the material to be plated into a cooling water tank and let it cool.

[0012] In the case of a holder in which a holding member consisting of a single horizontal bar and two parallel horizontal bars is attached to a gripping plate equipped with supporting wheels, a single horizontal bar is attached to an annular portion at one end of the material to be plated. By inserting a rod and inserting the other end of the material to be plated between the parallel horizontal bars, a rod-shaped material to be plated with an annular portion at one end can be held, and during plating, the support wheels can be placed on the conveyor rail. The holding tool is conveyed by driving the actuator, and the material to be plated can be charged into the plating bath and plated. Further, by gripping the gripping plate of the holder with the clamp portion of the rotary gripping device and rotating the clamp portion, the material to be plated can be rotated together with the holder, and the plating can be dripped.

Furthermore, in a plating bath immersion device that can be stored on the hood side, when it is not needed, the fittings of the guide shaft are removed, the connection with the actuator is released, and each bracket and arm are temporarily fixed. By removing the locking pins, each arm can be rotated relative to the bracket, allowing it to be folded and stored toward the hood.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The hot-dip plating apparatus of the present invention will be explained below with reference to drawings showing examples. FIG. 1 is a schematic plan view of a hot-dip galvanizing factory equipped with a hot-dip galvanizing apparatus for branch rods according to the present invention.

In the hot-dip galvanizing factory shown in the figure,
A melting furnace apparatus 1 is equipped with a plating bath 2 for hot-dip galvanizing, and a hood 3 for collecting dust is attached to the side of the plating bath 2 along the plating bath 2. The plating bath immersion device 4 is provided so as to be foldable. Further, a flux bath 5 is arranged close to the melting furnace apparatus 1 to utilize the heat of the exhaust gas, and a cooling water tank 6 is arranged parallel to and apart from the melting furnace apparatus 1.

On the work floor between the melting furnace device 1 and the cooling water tank 6, there is a rotatable clamp section at the tip of the work arm as a device for gripping and conveying the holder 8 of the branch rod 7 and rotating it. Two rotary gripping devices 9 and 10 are installed using a balancer equipped with a holder. supplying the device 4;
The rotary gripping device 10 grips the holder 8 of the branch rod 7 that has been hot-dip galvanized, rotates it to cut off the drippings of the plated zinc, and then supplies it to the cooling water tank 6. .

[0017] This will be explained in more detail below. Figure 2 is Figure 1
FIG. 2 is a perspective view of a holder 8 for a branch rod 7 used in the hot-dip galvanizing apparatus. This holder 8 is used to attach and hold the branch rod 7 as shown in FIG. At approximately the center of the upper surface of this horizontal gripping plate 13, a hanging rod 14 whose top part is bent into a hook shape is fixed in an upright state, and at an intermediate position of the hanging rod 14, a supporting wheel 1 is fixed.
5 is rotatably attached.

In this holder 8, the annular portion 7a to which the simple link 16 is attached at one end of the branch rod 7 is loosely inserted into the single horizontal rod 11, and the annular portion 7b to which the strap 17 is attached to the other end is inserted by approximately 80 mm. A plurality of branch rods 7 are installed and held in a loosely inserted manner between parallel horizontal rods 12 having an interval of .

FIG. 3 is a perspective view showing the rotary gripping device 9 used in the hot-dip galvanizing apparatus of FIG. 1, and as shown in the figure,
The holder 8 can be held, transported, and rotated by a rotatable clamp section 20 attached to the tip of the working arm 19 of the balancer 18.

The balancer 18 is a device that balances a heavy workpiece using a motor torque and can hold it in a zero-gravity manner.
The working arm 1 includes an arm 22 extending from a driving part at the top of the working arm 1 and the working arm 19 via a joint part.
An attachment such as a clamp part 20 for holding the workpiece is attached to the tip of the workpiece 9, and the operator 23 can easily move the workpiece in three dimensions such as vertically, horizontally, and diagonally by moving it with a lever. , such balancers 18 are known and commercially available. Note that in this embodiment, a movable pedestal type balancer is used.

Furthermore, the clamp section 20 attached to the rotary gripping device 9 is operated by an operator 23 to grip or unload the holder 8 by operating a clamp lever 24, and by operating a rotary operation lever 25 to unload the holder 8. The clamp part 20 holding the holder 8 can be rotated. The rotary gripping device 10 also uses the same device as the rotary gripping device 9.

FIG. 4 is an enlarged perspective view of the clamp section 20 and its attached mechanism shown in FIG. 3, and FIG. 5 is a side sectional view of the clamp section and its attached mechanism. A mounting part 26 is rotatably attached to the working arm 19 of the rotary gripping device 9, 10, and a holding part 27 connected to the lower part of the mounting part 26 has a rotating shaft having a spur gear 28 fixed to its front end. A cylinder 29 is held via a bearing 30, and a clamp portion 20 is attached to the spur gear 28.

That is, a bracket 31 is fixed to the spur gear 28, a horizontal fixing plate 33 is attached to the lower part of the bracket 31 via a fixing piece 32, and a vertically swinging plate 33 is attached to the upper part of the bracket 31 with a support shaft 34 as a fulcrum. A clamp plate 36 is attached via a movable piece 35 that can be moved. This clamp plate 3
6 has a V-shaped notch 37 in the front part, and the holder 8 can be sufficiently clamped by sandwiching the hanging rod 14 thereof, and when the clamp part 20 is rotated, the holder 8 It can prevent it from shifting.

Furthermore, the base end of the movable piece 35 is connected to the pusher piece 42 via link pins 38 and 39 and links 40 and 41.
Links are attached to . The pushing piece 42 is connected at its back to a pushing rod 44 via a link ball 43.
4 is connected to the clamp lever 24 via a link plate 45.

Therefore, when the clamp lever 24 is moved upward, the pushing piece 42 is pushed through the pushing rod 44, and the clamp plate 36 is moved upward using the support shaft 34 as a fulcrum by the link action.
You can increase the distance between the horizontal fixing plate 33 and the clamp plate 3 by moving the clamp lever 24 downward.
6 can be moved downward to grip the horizontal gripping plate 13 of the holder 8 together with the horizontal fixing plate 33.

A gear motor 46 with a brake is attached to the side of the holding portion 27, and a spur gear (not shown) is attached to the motor shaft of the gear motor 46, and meshes with the spur gear 28 within the gear box 47. That is, by pressing the switch button 48 attached to the rotation operation lever 25, the gear motor 46 can be driven and the clamp part 20 can be rotated together with the spur gear 28.

FIG. 6 is a side view showing a part of the plating bath immersion apparatus shown in FIG. 1, FIG. 7 is a side view supplementing FIG. 6, and FIG.
is a sectional view taken along line VIII-VIII in FIG. 6, and FIG. 9 is a plan view of the plating bath immersion apparatus in FIG.

A stepped hood 3 is disposed on the side along the plating bath 2 of the melting furnace apparatus 1, and vertically long brackets 49 are fixed to two places on the wall of the hood 3, and the upper arm 50 and a lower arm 5 that is slightly longer than this upper arm 50.
1 is formed into a frame using vertical members, and the vertical member on the base side is rotatably held by the bracket 49 as an arm support shaft 52, and the upper arm 50 is attached to the tip of the bracket 49 with a locking pin. By locking at 53, the upper arm 50 and the lower arm 51 are fixed in a state extending above the plating bath 2 at right angles to the longitudinal direction of the plating bath 2.

At the tip of each of the lower arms 51, a transport rail 55 having the same length as the plating bath 2 is arranged via a holder 54 so as to be located in the center of the plating bath 2 in the width direction. be. This transport rail 55 is a rail on which the supporting wheels 15 of the holder 8 holding the branch rod 7 described above are placed and rolled, and the branch rod 7 attached to the holder 8 can be immersed in the plating bath. The end of the holder insertion side (right side in the figure) is at a height level sufficient to hold the branch rod 7 above the plating bath, and the holder 8 is placed at a height level that is sufficient to hold the branch rod 7 above the plating bath. It is placed in a plating bath.

Furthermore, the end of the carrier rail 55 on the holder discharge side (left side in the drawing) is also inclined downward, and a receiving member 56 that can receive the support wheels 15 of the holder 8 is located close to the end of the carrier rail 55.
This receiving member 56 is connected to a lifting hydraulic cylinder 57 attached to the hood wall, so that it can move up and down. That is, the lifting hydraulic cylinder 57 has a bracket 71 attached to the hood 3, and an arm 73 to which the lifting hydraulic cylinder 57 is connected is rotatably held on the bracket 71 by its support shaft 72, and also has a locking pin. It is placed in a temporarily fixed state at 74 (FIG. 9).

A guide rail 58 made of an angle material and longer than the transport rail 55 is attached to the tip of the upper arm 50 in parallel with the transport rail 55. A guide shaft 59 is provided adjacent to and parallel to this guide rail 58.
is held by a guide holder 60 fixed at an arbitrary position on the guide rail 58. The guide shaft 59 is
The base end side (right side in the figure) is connected to a pushing hydraulic cylinder 65 as an actuator attached to a fixed frame 64 via joint fittings 61 and 62 and a connecting rod 63, and reciprocating motion is achieved by driving the pushing hydraulic cylinder 65. I have made it possible.

Furthermore, at four predetermined locations along the guide rail 58 of the guide shaft 59, push plates 67 are provided across wheels 66 that are placed on the guide rail 58 and can roll. This push plate 67 is designed to be able to transport the holder 8 by pushing the head of the hanging rod 14 of the holder 8 loaded on the transport rail 55.The upper and lower intermediate parts are connected in a hinged manner, and in the forward direction The hanging rod 14 can be pushed, but in the backward direction it abuts against the hanging rod 14 and is bent so that it cannot be pushed. Note that the push plate 67A along the loading side end of the transport rail 55 is shortened according to the height of the transport rail 55.

Therefore, in this plating bath immersion apparatus, when the pushing hydraulic cylinder 65 is operated to reciprocate the guide shaft 59, the pushing plate 67 at various locations is moved in the process.
push the hanging rods 14 of the holders 8 that are in contact with each other in the discharge direction, transport the holders 8 from the charging side to the discharge side, move the branch rods 8 in the plating bath, and move the suspension rods 14 to the discharge end. The retainer 8 is received by the receiving material 56 on the side, and the lifting hydraulic cylinder 57
By moving the branch rod 7 upward, the branch rod 7 can be lifted above the plating bath.

Furthermore, when the hot-dip galvanizing work of the series of branch rods 7 is completed and the plating bath 2 is to be used for the hot-dip galvanizing work of other materials to be plated, the plating bath immersion device 4 is used as a guide. The shaft 59 is connected to its fitting 6.
1 and 62 and the connecting rod 63 to separate it from the pushing hydraulic cylinder 65, and then pull out the locking pin 53 of the upper arm 50, the upper arm 50 will move upward in the direction of the arrow shown in FIG. The arm 50 and the lower arm 51 can be rotated, so that the transport rail 55, the guide rail 58, and the guide shaft 59 are brought to one side against the wall of the hood 3 and stored in the upper region of the stepped portion. It can be temporarily fixed by a locking means (not shown), and by providing an appropriate cover, it can be stored in a stored state without interfering with other operations. Regarding the lifting hydraulic cylinder 57, the bracket 7 can also be removed by removing the locking pin 74 as necessary.
1, the arm 73 can be rotated and stored off to the side of the hood 3.

The operation of the hot-dip galvanizing apparatus according to the embodiment constructed as described above will be explained with reference to FIG. The branch rod 7 as a material to be plated is flux-treated in a flux bath 5 by a transport mechanism (not shown) or by manual operation, and then
A predetermined number of sheets are sequentially arranged in parallel on the pedestal 68 at location A2 with the annular portions 7a at the ends aligned.

First, by reciprocating the pushing hydraulic cylinder 65 of the plating bath immersion device 4 at a predetermined slow speed, the push plate 67 fixed to the guide shaft 59 is caused to reciprocate.

Next, the rotary gripping device 9 is operated by the worker 69, and the holder 8 is clamped and gripped by the clamp part 20 on the stage at a location A1 in front of the center of the plating bath 2, which is set as a storage place for the holder 8. It is transported to the position of the pedestal 68 at location A2, and the parallel branch rods 7 are attached and held.

After transporting the holder 8 with the branch rod 7 attached to the location A3 at the end of the transport rail 55 and placing the support wheels 15 of the holder 8 on the transport rail 55, the worker 6
9 moves the clamp section 20 to the location A1 and clamps a new holder 8.

A worker 69 who operates the rotary gripping device 9
Attachment of the branch rod 7 to the holder 8 and supply of the holder 8 are repeated in the above order. Note that since this operation does not require rotation of the clamp section 20, a gripping device without a clamp section rotation mechanism may also be used.

On the other hand, the holder 8 loaded on the transport rail 55 moves forward by pushing the head of the hanging rod 14 toward the discharge side by the reciprocating push plate 67A as described above, and then descends diagonally to be immersed. The support rod 7 is lowered to the plating bath. (See Figure 6)

The dipped holder 8 is pushed forward by the next push plates 67B and 67C in order, and continues plating the branch rod 7. The holder 8 that has reached the discharge end is pushed by the push plate 67D, descends from this discharge end obliquely, and is loaded onto the receiving material 56 at location B1. Next, the lifting hydraulic cylinder 57 moves upward, moving the holder 8 upward together with the receiving material 56, and lifting the support rod 7 above the plating bath.

The lifting hydraulic cylinder 57 is operated in conjunction with the pushing hydraulic cylinder 65, but as another means, it is operated by a gravity sensor that detects the holder 8 loaded on the receiving material 56. You can do it like this.

Next, the worker 70 operating the rotary gripping device 10 moves the clamp section 20 to the location B1, clamps the holder 8 on the receiving material 56, and then moves it to the location B2 outside the plating bath 2. Move the holder 8 until the clamp part 2
0 is rotated half a turn, and if necessary, the branch rod 7 is slightly vibrated by vertical movement to remove any adhering zinc from the branch rod 7, and then rotated another half turn to return to its original position. After moving the holder 8 to the cooling water tank 6 at location B3, the branch rod 7 is put into the cooling water tank 6 while holding the holder 8 and is cooled. After cooling, this branch rod 7
is detached from the holder 8 by hooking it on the edge of the cooling water tank 6 or a member attached to the edge.

Next, the holder 8 with the branch rod 7 attached and detached is transported to the location B4, that is, the location A1, and the clamp is released to release the holder 8. Thereafter, the rotary gripping device 10 is caused to repeat the above operation.

In operating the rotary gripping device 10, it is also possible to perform drip cutting by applying vibration to the clamp portion 20 as necessary before and after the rotational dripping. This vibration can be generated by manual vertical movement or by repeatedly turning on and off the switch button 48 of the rotary operation lever 25 of the clamp section 20.

After the plating work of the branch rod 7 is completed, the plating bath immersion device 4 moves the guide shaft 5 as described above.
By removing the joint fittings 61 and 62 of 9 and the locking pin 53 of the upper arm 50, the rotary gripping devices 9 and 10 can be stored in one side in the hood 3, and the rotary gripping devices 9 and 10 can be moved outside the working area and stored. Similarly, the lifting hydraulic cylinder 57 can also be stored on one side in the hood 3 by removing the locking pin 74.

Furthermore, in the embodiment described above, two rotary gripping devices 9 and 10 are used, but depending on the work program, operation with one rotary device is also possible.

Note that, regardless of the above-described embodiments, in the present invention, the holder 8 is charged into the plating bath or lifted out of the plating bath by the lifting hydraulic cylinder 57 by the rotary gripping devices 9 and 10. It is also possible to perform this by direct manipulation.

Using the hot-dip galvanizing apparatus described above, FIG.
The actual work was carried out using this arrangement. That is, the wire diameter of the branch rod 7 and the number of attachments per holder are 15 of 9 mm, 13 of 13 mm,
For each of the cases of 10 pieces of 16 mm, 7 pieces of 19 mm, and 5 pieces of 22 mm, the length of the horizontal bar 11 and the parallel horizontal bar 12 was about 550 mm, and the holder 8 had a leg spacing of about 600 mm.
A series of continuous operations were carried out each day using a plating bath immersion time of 55 to 60 seconds. In addition, two rotary gripping devices 9 and 10
is a commercially available balancer (Motoda Electronics Co., Ltd. Wyman M)
Y-B-186) is equipped with a rotary clamp portion that rotates at 10 revolutions per minute as shown in FIG.

As a result, the plated products had no dimensional defects or protrusions due to dripping of the deposited zinc, and the appearance was improved compared to the conventional manual work. The work can now be done in 3 jobs: 1 person to operate each rotary gripping device and 1 person to be in charge of the plating bath, who scrapes up floating dross on the plating bath. Reduced construction work by half. In addition, there is no need for manual labor to carry heavy objects, and the work no longer requires skill, resulting in improved work efficiency and significantly improved work safety.

In the hot-dip galvanizing apparatus of the present invention according to the embodiments described above, the combination of the rotary gripping devices 9 and 10 and the plating bath immersion device 4 allows the branch rod 7 or a material to be plated of a similar shape to be transferred to the plating bath. The hot-dip plating process, which consists of charging, pulling up, and rotary cutting of the pulled-up plated product, is done in a way that does not impose heavy labor burden on the workers.
Although it can be carried out semi-automatically and continuously or semi-continuously, if the manually operated rotary gripping devices 9 and 10 are replaced with robots, it is possible to carry out the hot-dip plating process automatically and continuously. This is especially advantageous when the amount of material to be plated is large and a dedicated plating bath is required.

[0052] Depending on the work program, operation may be performed by one of the rotary gripping devices or the robot.

[0053]

[Effects of the Invention] As is clear from the above description, the present invention has the following effects. (1) Heavy labor in hot-dip plating work has been eliminated. (2) The need for skill in hot-dip plating work has been reduced. (3) Improved workability in hot-dip plating work. (4) Improved safety of hot-dip plating work. (5) Depending on the economic efficiency of the hot-dip plating operation, it is possible to select automatic or semi-automatic continuous operation. (6) The equipment is relatively simple. (7) In particular, it is possible to easily hot-dip plate a rod-shaped body that has an annular portion at one end and which is combined with an attached metal fitting, which is difficult to cut off. (8) In particular, since the plating bath immersion device can be easily stored, it does not interfere with the hot-dip plating work of other materials to be plated.

[Brief explanation of drawings]

FIG. 1 is a plan layout diagram of a hot-dip galvanizing factory equipped with a hot-dip galvanizing apparatus for branch rods according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a branch rod holder in the hot-dip galvanizing apparatus of FIG. 1;

FIG. 3 is a perspective view of the rotary gripping device of the hot-dip galvanizing apparatus of FIG. 1;

FIG. 4 is an enlarged perspective view of the clamp section and its attached mechanism in the rotary gripping device of FIG. 3;

5 is a side sectional view of the clamp portion of FIG. 4 and its attached mechanism; FIG.

6 is a side view showing a part of the plating bath immersion device of the hot-dip galvanizing apparatus in FIG. 1; FIG.

7 is a side view showing another part of the plating bath immersion device of the hot-dip galvanizing apparatus in FIG. 1; FIG.

8 is a sectional view taken along line VIII-VIII in FIG. 6. FIG.

9 is a plan view of the plating bath immersion apparatus of FIG. 6. FIG.

FIG. 10 is a perspective view of a branch rod.

[Explanation of symbols]

1 Melting furnace equipment 2 Plated bathtub 3 Food 4 Plating bath immersion equipment 5 Flux bathtub 6 Cooling water tank 7 Branch line rod 7a, 7b Annular part 8 Holder 9 Rotating gripping device 10 Rotating gripping device 11 Horizontal bar 12 Parallel horizontal bar 13 Horizontal grip plate 14 Hanging rod 15 Support wheels 20 Clamp part 24 Clamp lever 25 Rotary operation lever 28 Spur gear 33 Horizontal fixing plate 36 Clamp plate 46 Gammotor 49 Bracket 50 Upper arm 51 Lower arm 52 Arm support shaft 53 Locking pin 55 Conveyance rail 56 Received material 57 Hydraulic cylinder for lifting 58 Guide rail 59 Guide shaft 61, 62 Joint fittings 63 Connecting rod 65 Hydraulic cylinder for pushing 66 Wheels

Claims (3)

[Claims] 1. A rotary gripping device comprising a clamp part that can rotate by gripping a holder holding a material to be plated, the clamp part being movable; A hot-dip plating apparatus comprising a plating bath immersion device capable of charging and immersing a material into a plating bath, the plating bath immersion device having the holding tool at a level that allows the material to be plated to be immersed in the plating bath. A transport rail for holding the plating bath is provided above the plating bath, and a guide shaft with an actuator connected to the base end is provided parallel to the transport rail. A movable push plate is attached, and the reciprocating movement of the guide shaft by the drive of the actuator,
A hot-dip plating apparatus characterized in that the push plate pushes a holder on the transport rail in one direction to immerse a material to be plated in a plating bath. 2. The holder is a holder for mounting and holding a rod-shaped material to be plated having an annular portion at one end, the holder being a single holder that holds one end of the material to be plated by loosely inserting it into the annular portion. and two parallel horizontal bars that loosely insert and hold the other end of the material to be plated, the holding member being spaced apart above the holding member and having support wheels on the upper part. The hot-dip plating apparatus according to claim 1, wherein the hot-dip plating apparatus is attached to a grip plate. 3. The plating bath immersion device has a plurality of brackets attached to a hood provided along the plating bath, each bracket rotatably holding an arm formed on a frame body, and the arm Temporarily fix the arm and the bracket with a locking pin at a position where is perpendicular to the longitudinal direction of the plating bath, and allow the arm to pivotally hold the transport rail and the guide shaft, and the guide shaft 2. The hot-dip plating apparatus according to claim 1, wherein the hot-dip plating apparatus is connected to an actuator via a fitting, and can be stored in one side in the hood by removing the locking pin and the fitting.