JPS599005Y2 - Conveyance chain drive mechanism in automatic plating equipment - Google Patents

Description

[Detailed description of the invention] This invention uses an endless conveyor chain that is stretched between a main conveyor chain wheel and a follower conveyor chain wheel to intermittently feed the objects to be coated into the processing tank. The present invention relates to a drive mechanism for intermittently feeding the conveyor chain in an automatic plating apparatus that continuously performs plating on objects to be plated by dipping them in water.

An overview of this type of automatic plating apparatus described above will be explained with reference to FIGS. 1 and 2. A conveyance chain 1 conveys objects to be plated to a large number of plating tanks 2 to 2 arranged in an array. Therefore, the lower conveyance chain 1A and the upper conveyance chain IB are arranged in two rows, upper and lower.

Now, the lower conveyance chain 1A is hung endlessly between the conveyance main chain wheel 3 and the conveyance slave chain wheel 4, and the upper conveyance chain 1B
is shaped to have the same dimensions as the lower conveyance chain 1A, and includes a conveyance main chain wheel (not shown) fixed on an upward extension of the conveyance main chain wheel 3, which will be described later, and the conveyance slave chain wheel (not shown). The chain wheel 4 is suspended in parallel with the lower conveyance chain 1A between a conveyance slave wheel (not shown) mounted on an upward extension of the central axis of the chain wheel 4.

Therefore, the lower conveyance chain 1A and the upper conveyance chain 1B are shaped so as to run integrally as the drive shaft 8 rotates.

Thus, between the lower conveyance chain 1A and the upper conveyance chain 1B, which are formed as a pair of upper and lower conveyors, a large number of second columnar carriers 5 are arranged at equal intervals along the length of these chains. As shown in the figure, a hanger unit 6 is mounted vertically to each carrier 5 and is movable up and down along the carrier 5. The hanger unit 6 is moved up and down by a lift device (not shown).

However, the lever unit 6 has a bar-shaped hanger 7 horizontally protruding outward for suspending the object to be plated at the tip thereof, and the object to be plated is transported horizontally by the running of the conveyor chain 1. By raising and lowering the hanger unit 6, the object to be plated can be moved up and down.

Conventionally, as a conveyance chain drive mechanism for the above-mentioned plating apparatus, as shown in FIG. , the ratchet wheel 10 is intermittently rotated via the swing arm 13 which swings around the drive shaft 8 by the reciprocating movement of the piston rod 12 of the fluid pressure cylinder 11, thereby moving the conveyor chain a predetermined distance only in the direction of the arrow. A method of running it was being considered.

However, in this system, the rotation angle of the drive shaft 8 is not only limited by the number of pawls of the pawl wheel 10 and cannot be freely set, but also the rotation angle of the piston rod 12 of the fluid pressure cylinder 11 and the swing arm 13. Since the intersecting angle with the piston always fluctuates during the piston stroke, the magnitude of the torque for rotationally driving the drive shaft 8 constantly fluctuates, resulting in a drawback that the conveyance of the object to be plated by the conveyance chain becomes unstable.

゛The present invention can solve the above-mentioned problems of the conventional drive mechanism, and furthermore, it is possible to transport the object to be plated a required distance by one operation of the fluid pressure cylinder, and the drive energy of the fluid pressure cylinder can be reduced. It is an object of the present invention to provide a drive mechanism that can utilize as efficiently as possible.

The present invention is an automatic plating device that suspends objects to be plated on a conveyor chain and continuously applies plating to the objects. A driving main chain wheel is attached to the driving main chain wheel interposed therebetween, and a driving slave chain wheel is rotatably supported on the driving main chain wheel at a position of an appropriate distance to connect the driving main chain wheel and the driving chain wheel. An endless drive chain is suspended between the vehicle and the vehicle, and an end of a piston rod of a fluid pressure cylinder mounted along one side of the drive chain is connected to a part of the drive chain. That is.

Next, one embodiment of the present invention will be explained in detail with reference to FIGS. 1, 2, and 4.

It should be noted that the entire plating apparatus has already been briefly explained with reference to FIGS. 1 and 2, so a repeated explanation will be omitted.

Now, in this example, the main chain wheel for conveyance 3 on which the lower conveyance chain 1A is hung, and the main chain wheel for conveyance (not shown) on which the upper conveyance chain 1B is hung, are attached to a common drive shaft 8 in a downward direction. The lower end portion thereof is rotatably supported by the machine frame 19.

Therefore, the main chain wheel 3 for conveyance and the machine frame 19 are connected to the drive shaft 8.
A driving main chain wheel 15 is attached with a one-way clutch 14 interposed therebetween, and a driving slave wheel 16 (not shown) is strategically arranged between these driving main chain wheels 1.
An endless drive chain 17 is stretched between the drive chain wheel 5 and the drive follower chain wheel 16.

Further, a hydraulic cylinder 18 for driving is strategically attached (not shown) substantially along one side of the drive chain 17, and the tip of the piston rod 20 is connected to the connecting fitting 2.
1 to one side of the drive chain 17.

That is, the fluid pressure cylinder 18, which is the driving source, operates,
When the piston rod 20 reciprocates in a straight line, the piston rod 20 and the drive chain 17 connected by the connecting fitting 21 are caused to travel in the front-rear direction according to the length of the stroke of the piston rod 20.

Therefore, the driving main chain wheel 15 and the driving subordinate chain wheel 16, on which the driving chain 17 is wrapped, are rotated alternately in both forward and reverse directions by the driving chain 17.

However, the driving main chain wheel 15 is rotated only in the forward rotation direction by the action of the one-way clutch 14, and the conveying chain 1 is intermittently moved in the direction indicated by the arrow P in FIG.

In this example shown in FIG. 4, when the piston rod 20 leaves, the conveyor chain is made to travel a distance corresponding to the stroke of the piston rod 20, but since the piston rod 20 moves back and forth almost along the drive chain 17, Most of the driving force of the fluid pressure cylinder 18 is effectively used as it is to drive the conveying chain, and the magnitude of the driving force hardly changes during the piston stroke.

Therefore, according to the drive mechanism of this example, unlike the above-described conventional drive mechanism, it is possible to transport the object to be plated in a stable state.

That is, the conveyance chain drive device according to the present invention suspends the object to be plated on an endless conveyance chain that is stretched between a main conveyance chain car and a subordinate conveyance chain car, and In an automatic plating apparatus that continuously performs plating treatment on the object to be plated by sequentially immersing the object to be plated in a treatment tank while intermittently feeding the object to be plated by a rotational drive, the lower part of the drive shaft of the main chain car for conveyance is A driving main chain wheel is attached to the driving main chain wheel with a one-way clutch interposed therebetween, and a driving driven chain wheel is rotatably supported on the driving main chain wheel at a position of an appropriate distance between the driving main chain wheel and the driving chain wheel. An endless drive chain is suspended between the drive chain wheel and the drive chain, and an end of a piston rod of a fluid pressure cylinder mounted along one side of the drive chain is connected to a part of the drive chain. By controlling the stroke of the fluid pressure cylinder, the conveyance distance can be appropriately set, and the driving force of the fluid pressure cylinder can be used extremely efficiently to drive the conveyance chain. Moreover, the object to be plated can be transported in an extremely stable state without fluctuations in the transport driving force.

Therefore, the conveying chain drive mechanism according to the present invention is extremely practical and can be said to be indispensable for this type of automatic plating apparatus.

Moreover, in the present invention, the distance between the driving main chain wheel and the driving subordinate chain wheel can be selected to an appropriate size due to the above-described structure.

In other words, since it is possible to use a fluid pressure cylinder with a large stroke by setting the distance between the two chain wheels appropriately large, the intermittent conveyance distance of the object to be plated by one operation of the fluid pressure cylinder can be set appropriately large. can do.

Moreover, since the fluid pressure cylinder can be simply mounted along the drive chain, the selection of its mounting position is not subject to any restrictions imposed by other members, which is convenient.

Furthermore, in the present invention, the tip of the piston of the fluid pressure cylinder is connected to a part of the drive chain, so when the piston of the fluid pressure cylinder moves forward or backward, the force applied to the drive chain will inevitably drive the piston. A component force is generated that presses the chain laterally, and this component force is converted into tension force for the drive chain, so that the energy of the fluid pressure cylinder can be effectively used for conveying the object to be plated.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing the outline of the automatic plating apparatus, Fig. 2 is an enlarged perspective view of the main part showing the state in which the carrier is attached to the conveyor chain, and Fig. 3 is a conventional example of the part A in Fig. 1. FIG. 4 is a perspective view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Conveyance chain, 3... Main chain wheel for conveyance, 4... Follow chain wheel for conveyance, 8... Drive shaft, 14... ...One-way clutch, 15...
・・Main chain wheel for driving, 16 ・・・・Subordinate chain wheel for driving, 1
7... Drive chain, 18... Fluid pressure cylinder, 20... Piston rod.

Claims (1)

[Scope of utility model registration request] The object to be coated is suspended on an endless conveyor chain that is stretched between a main chain wheel for conveyance and a follower chain wheel for conveyance, and the object to be coated is intermittently fed by the rotational drive of the main chain wheel for conveyance. In an automatic plating apparatus, in which the object to be plated is sequentially immersed in a treatment tank to perform plating treatment on the object to be plated, a one-way clutch is interposed at the lower part of the drive shaft of the main chain wheel for driving. At the same time, a driving chain wheel is rotatably supported on the driving main chain wheel at a position of an appropriate distance, and an endless shape is provided between the driving main chain wheel and the driving driving chain wheel. An automatic plating apparatus characterized in that a drive chain is wrapped around the drive chain, and an end of a piston rod of a fluid pressure cylinder mounted along one side of the drive chain is connected to a part of the drive chain. Conveyor chain drive mechanism.