JPS6132900Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology is a technology that enables unit slats of slat conveyor devices installed in automobile manufacturing lines, etc. to perform intermittent conveyance and continuous conveyance in one line. Belongs to a field.

Therefore, in this invention, a plurality of slat plates interconnected by a connecting chain are conveyed and moved on a guide rail via support rollers, and a traction dog is engaged with the conveying chain. A continuous conveyance chain and an intermittent conveyance chain are installed on the frame, and the frame is equipped with a continuous conveyance chain and an intermittent conveyance chain.
The slat plate is provided with traction dogs for both conveyance chains, and a selective hooking and unhooking device provided on the frame selectively engages both traction dogs with the corresponding conveyance chain, and detaches them from the other conveyance chain. This invention relates to a slat conveyor device in which an intermittent conveying chain is interposed in the length direction of a continuous conveying chain, and pushers are attached to the frame to smooth conveyance at the starting and rear ends of the chain. This invention relates to a slat conveyor device installed for

<Prior art> As is well known, various conveyor systems are used in automobile manufacturing factories, etc., but welding,
Slat conveyor systems are widely used in outfitting lines due to their stability and ability to carry heavy objects.

In this type of slat conveyor device, automatic welding of the body and automatic installation of the door by industrial robots will be described in the first section below for convenience of explanation due to the nature of the work.
The intermittent conveyance slat conveyor device shown in the figure also
Continuous slat conveyors are used in manual work lines for various types of outfitting.

The reason why the intermittent conveyance slat conveyor device and the continuous conveyance slat conveyor device are employed separately and independently in this way is that the former potentially
This is because the safety of workers cannot be easily ensured when the body is rapidly fed, and the workers have to wait, resulting in a decrease in efficiency.On the other hand, in the latter case, it is not possible to automate each task.

<Problems to be solved by the invention> However, installing a continuous slat conveyor device and an intermittent slat conveyor device together as a line requires an extremely large amount of equipment space, and the device is also extremely large, resulting in cost problems. However, it has the disadvantage that it is extremely expensive, and along with this, it also has the disadvantage of requiring additional auxiliary equipment, and has the disadvantage that line planning is likely to be subject to significant restrictions.

For example, the one described in Japanese Patent Application Laid-Open No. 52-57685 is equipped with a chain capable of continuous conveyance and intermittent conveyance, and is capable of conveying pallets at a desired optimum speed through a hanging/unloading device. Although there is a technology, the disadvantage is that these pairs of winding chains are made of the same length, which increases the equipment cost.
Although there is a fact in Publication No. 18736 that a main and auxiliary propulsion device is used, although there is a pair of main and auxiliary propulsion devices, the speed between the two propulsion devices is the middle of the speed difference that includes the stopped state of both devices. There is no device to transfer
There is an inconvenience that the impact of the workpiece during transfer is large.

The purpose of this invention is to solve the above-mentioned problems based on the conventional technology as a technical problem, and to make the slat conveyor line into one line, which includes an intermittent conveyance station for automated work, etc., and a continuous conveyance station for rigging, etc. It is an object of the present invention to provide an excellent slat conveyor device which is linearly provided and which can selectively carry out intermittent or continuous conveyance of the slat plates in station units, thereby benefiting fields in which conveyance technology is utilized in various manufacturing industries.

<Means/effects for solving the problems> In accordance with the above-mentioned purpose, the structure of this invention, which is based on the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems by mutually communicating with each other in one work station unit. A plurality of connected slat plates are towed by a long-span continuous conveyance chain and conveyed along guide rails, during which time predetermined assembly, rigging, etc. work is performed at a corresponding station, and then automation work, etc. At the station, the traction dog for the continuous conveyance chain is removed, and the short span intermittent conveyance chain is pulled to perform intermittent conveyance, and predetermined automatic work such as automatic welding is performed, and during the intermittent conveyance, the stopper device of the frame is is stopped at a predetermined work position for a predetermined time, and when the intermittent conveyance chain rapidly transfers the slat plate after automatic operation to the next stage continuous conveyance chain, the traction to the intermittent conveyance chain is stopped,
Instead, a traction dog is engaged with the continuous conveyance chain to perform continuous conveyance, and predetermined assembly, loading, etc. work is performed, and the frame is provided to take over from continuous conveyance to intermittent conveyance. Technical measures have been taken to ensure a smooth transition by slowly pressing the button and quickly touching the baton from intermittent conveyance to continuous conveyance.

<Example> Next, for the sake of explanation, an example of the invention shown in Figure 3 and below will be explained while comparing and contrasting it with a general intermittent conveying slat conveyor device as shown in Figure 1. be. Incidentally, parts having the same aspect will be explained using the same reference numerals.

In the embodiment shown in FIG. 1, an intermittent conveying slat conveyor device 1 constitutes a basic embodiment, and guide rails 3, 3 are attached to the inside of both sides of a frame 2, and a plurality of slat conveyors for one station and one work process are installed. The plates 4, 4, . . . are connected via connecting chains 5, 5, and are movable by rollers 6, 6, .

Furthermore, an intermittent conveyance chain 9 is endlessly installed in a guide frame 7 provided at the center of the frame 2 via guide rails 8, 8, and a traction chain 9 provided on a bracket 10 provided below the slat plate 4 is connected to the guide frame 7 provided at the center of the frame 2. The guide frame 7 is provided with a release pawl 12 for detaching the towing dog 11 from the intermittent conveyance chain 9, so that the towing dog 11 engages and floats at a predetermined rigging work site. After ascending and leaving the intermittent conveyance chain 9, the hook 14 of the stopper device 13 is engaged with the stopper 15 of the slat plate 4 by a limit switch (not shown) to stop the slat plate 4.

By changing the design of this basic conventional mode, a slat conveyor device 1' of the present invention is constructed as shown in FIG.
In this case, the rollers 6 on both sides of the slat plate 4,
Towing dogs 11 and 1 are attached to the left and right outside of the 6.
1 is installed on brackets 10, 10 installed under a pair of slat plates 4, and can be freely engaged with and detached from a pair of intermittent conveyance chains 9, 9 provided on the frame 2 with a short span of a set length as shown in FIG. has been done.

Then, the air cylinder 16 provided on the frame 2 and interlocked with a limit switch (not shown) expands to extend the link 1 of the stopper device 13 shown in FIG.
When the link 19 is raised via the links 7 and 18, each towing dog 11 is lifted relative to the corresponding bracket 10 and is disengaged from the intermittent conveying chain 9.

Hook 14 connected to link 19 at the same time
The slat plate 4 rises around the pin of the frame 2 and rises in front of the stopper 15 of the slat plate 4 in the direction of movement, and the slat plate 4 moves in the direction of the arrow.
At the same time, the presser stopper 14' cooperates with the hook 14 to clamp the stopper 15 integrally provided under the slat plate 14 by the air cylinder 16' extended by a limit switch (not shown), and the slat plate 4 is stopped. The slat conveyor is stopped at a predetermined position by preventing the recoil movement when it comes into contact with the stopper 15.

Further, the intermittent conveyance by the intermittent conveyance chains 9, 9 is resumed by the stopper 15, which is operated in the opposite manner to the above-mentioned process.
This is done by disengaging the hook 14 and presser stopper 14' from each other and lowering the traction dog 11 to engage the intermittent conveyance chain.

As shown in FIG. 4, the guide rails 8', 8' provided on the central frame 7 are equipped with a long-span continuous conveyance chain 9 with the short intermittent conveyance chains 9, 9 interposed in the middle. A traction dog 11' is provided on a bracket 10' which is rotatably arranged in an endless manner, and which is pivotally supported on the slat plate 4 and provided on a lower bracket 10', which can be freely engaged and detached. The rail 12' is provided in the span of the intermittent conveyance chain 9 in FIG. 4, and through the relative engagement of the advancing tow dog 11', the tow dog 11' is raised, separated from the continuous conveyance chain 9', and continuous conveyance is started. The slat plate 4 is moved by the length of the span separated from the chain 9'.
The dog 11 is engaged with the intermittent conveyance chain 9.

Furthermore, as shown in FIG. 4, work stations 0', 1, 2, .
When parts assembly work, automatic welding work W, and outfitting work are performed at the 6th and 7th stations (st is the station symbol), the automatic welding work W is performed at each of the 2nd and 3rd stations. Stop only at the 3rd station and perform intermittent transport.
When conveying after stopping, high-speed conveyance is performed.

Note that the suffix indicates the end of each station.

In this embodiment, as shown in FIG. 4, a constant speed continuous conveyance chain 9' is wound around and tensioned around sprockets 21, 21', and an intermittent conveyance chain 9 is stretched around sprockets 21, 21'.
Sprocket 22, 2 provided between 1, 21'
2', each continuously operating motor 2
3, and an intermittent rotation motor 24 which is operated by switching from low speed to high speed and from high speed to low speed, is engaged by a belt pulley, and the intermittent conveyance chain 9 is connected to a continuous conveyance chain 9' as shown in FIG. As mentioned above, the joint release rail 1 is stretched within the span of
The continuous conveyance chain 9' is intermittently conveyed by disconnecting the dog 11' from the continuous conveyance chain 9', and continuously conveyed before and after that.

Reference numerals 25 and 26 are cylinder type pushers, which connect the intermittent conveyance chain 9 to the continuous conveyance chain 9'.
The slat plate 4 is engaged with the stopper 15 and transferred from the latter to the former.

Further, as a design example, the distance between each station st is 5000 mm per pitch, the automated work time is T, and the takt time is 80 seconds.

In the above configuration, first, the first
The process of transferring the automobile body 20 from the 3rd station to the 4th station where continuous transport is performed will be described.

It is necessary to clear the work stage in advance for the body 20C that will be transported later for the body 20D that is currently being outfitted at the 4th station, so the body 20D of the 4th station is transported to the 5th station. 6
5 seconds ago, that is, as shown in FIG. 5, the horizontal axis time (seconds) and the vertical axis distance (mm),
Starting from P shown in , the body 20C that has undergone automatic welding work is rapidly transported.

In this case, as described above, the stopper device 13 shown in FIG. It is conveyed, and as shown in FIG. 5, it reaches from the third station to the fourth station in about 13 seconds, where the intermittent rotation motor 24 is stopped and the intermittent conveyance chain 9 is stopped by a brake (not shown).

By the way, as shown in FIG.
In order to empty the stage by starting the body 20D from the preceding 4th station 6 seconds after the start of is started first and has been advanced by 450 mm, so the pusher 25 is actuated by a limit switch (not shown) and the slat plate 4 is moved at the graph V' as shown in Fig. 5.
The slat plate 4 is engaged with the stopper 15 of the slat plate 4.
was conveyed at a slow speed, conveyed 700 mm during the S stroke, engaged the traction dog 11' to the continuous conveyance chain 9' and transferred it to complete the baton touch, then moved to the rear stage of the 4th station at the V'' curve, Undergo the prescribed outfitting work.

Therefore, the impact caused by the difference in handover speed is small.

During this time, when the baton is passed from the intermittent conveyance chain 9 to the continuous conveyance chain 9', the dog 11' of the continuous conveyance chain 9' crosses the end of the joint release rail 12' and the dog 11' engages with the continuous conveyance chain 9'. It will be done smoothly.

On the other hand, the body 20A, which is being continuously transported and being assembled at the 0st station, is automatically welded together with the slat plate 4 from the 0st station at the starting end via the 1st station for assembly by the continuous transport chain 9'. In the process of transporting the body 20 to the 2nd station of W, as shown in FIG. The traction dog 11 is engaged with the stopper 15 of the plate 4 for rapid conveyance, operates rapidly from P' to Q' for 4 seconds, and then is stopped for 2 seconds.

Therefore, the impact of speed changes during handover is small.

During this time, the traction dog 11' rides on the joint release rail 12' during the relative rapid conveyance process of the slat plate 4 from the continuous conveyance chain 9' to the intermittent conveyance chain 9, and the dog 11' comes off from the continuous conveyance chain 9' and is smoothly connected. There is no problem in passing the baton to the combined intermittent conveyance.

The intermittent conveyance chain 9 to which the body 20A' has been transferred is then started at high speed by the intermittent rotation motor 24 after a 2-second stoppage of the waiting time, and transfers the body 20D to the 4th station as described above.
It operates for 13 seconds from 6 seconds before reaching the 5th station, and at the same time, it operates from the 1st station to the 2nd station for 13 seconds to move the body 2.
Transport 0A'.

When the body 20A' reaches the second station, a limit switch (not shown) causes the link 19 to move to the traction dog 1 via the air cylinder 16 and the links 17, 18, 18, as shown in FIG.
1 and is released from the intermittent conveyance chain 9, the hook 14 comes into contact with the stopper 15 of the slat plate 4 and forcibly stops the slat plate 4 which has inertia, and the air cylinder 16' also presses the stopper 15 of the slat plate 4. 14' is advanced to prevent the slat plate 4 from retreating due to reaction, and the stopper 15 is held together with the hook 14 to stop and fix the slat plate 4.

In this state, predetermined automatic welding W is performed at the second station.

When the automatic welding W ends in T seconds as shown in FIG. 6, the air cylinders 16 and 16' retract according to the setting program, and the stopper 15
4. The clamping force by the presser stopper 14' is released, the link 19 is lowered, the traction dog 11 is reengaged with the intermittent conveyance chain 9, and at the same time the intermittent rotation motor 24 is started again, and the body 20
B is transferred from the 2nd station to the 3rd station, and automatic welding W is performed again for T seconds. Thereafter, each body 20 is conveyed through a continuous conveyance process and an intermittent conveyance process, and assembly, automatic welding W, and outfitting are performed once again. This is done in line with flow processing.

It goes without saying that the embodiment of this invention is not limited to the above-mentioned embodiments; for example, the continuous conveyance chain and the intermittent conveyance chain may be connected in the conveyance direction so that they do not overlap, or , it is also possible to omit the conveyance pusher.

Of course, the target conveyed object can also be a work other than a car.

<Effects of the invention> As described above, according to this invention, in the slat conveyor device, a plurality of slat plates are connected for one process, and each is engaged with a guide rail, so that the continuous conveyance chain and the intermittent conveyance chain can be freely engaged and separated. Furthermore, the frame is provided with a continuous conveyance chain and an intermittent conveyance chain for both the tow dogs, and furthermore, the frame is provided with a device for selectively engaging and disengaging both the tow dogs from the corresponding conveyance chain. By installing this, the slat conveyor line can basically be selectively operated for continuous conveyance or intermittent conveyance in one line, eliminating the need for the two dedicated lines that were previously installed, and allowing the slat conveyor line in the factory to be The space occupied by the conveyor is significantly reduced, the equipment is correspondingly smaller, fewer identical parts can be used, and the production equipment is extremely economically advantageous.

In addition, since automatic welding and outfitting can be performed on the same line, there is no need for stage changes, transfers, etc. Therefore, the production efficiency of the line is significantly improved and the excellent effect of strengthening the mass production system is achieved. .

This also has the effect of improving accuracy and increasing product value.

Furthermore, since multiple operations can be performed on one line, it is easy to control, and depending on the design, continuous and intermittent conveyance can be combined as appropriate, increasing the degree of freedom in line design and significantly improving the production function of the factory. It also has a strengthening effect.

By interposing an intermittent conveyance chain with a short span in the longitudinal direction in the middle of a continuous conveyance chain with a long span, it is possible to shorten the intermittent conveyance chain for work such as automatic welding, and to convey the entire equipment. The length of the chain as a whole can be set to the optimum length, which has the excellent effect of reducing the initial cost of the device, making maintenance, inspection, etc. easier, and keeping running costs low. .

In addition, by providing pushers to the frame at the transfer points from the continuous conveyance chain to the intermittent conveyance chain, and from the intermittent conveyance chain to the continuous conveyance chain, each conveyance chain at these transfer points Since the pusher can transport the slat conveyor at an intermediate speed that softens the impact caused by the difference in speed, the impact on the workpiece is small and the durability of the entire device is improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a general slat conveyor, and Fig. 2 and the following are explanatory views of one embodiment of this invention.
Fig. 2 is a sectional view of the slat conveyor device, Fig. 3 is a schematic side view of the stopper device, Fig. 4 is a side view of the line arrangement, and Fig. 5 is a diagram showing the transfer time and distance from the intermittent conveyance line to the continuous conveyance line. A graph diagram, FIG. 6, is a graph diagram of transfer time and distance from a continuous line to an intermittent line. 4...Slat plate, 6...Roller, 3...
...Guide rail, 9,9'...Chain, 2,7...
...Frame, 11, 11'...Dog, 13...Stopper device, 1...Slat conveyor device, 9'
...Continuous conveyance chain, 9...Intermittent conveyance chain, 1
2', 15...Selective hooking/unhooking device.

Claims (1)

[Scope of utility model registration request] Each of the plurality of slat plates connected to each other for each bogie is engaged with the guide rail through its support rollers, and a traction dog is removably provided with respect to the conveyance chain. is provided with a stopper device for the slat plate, a continuous conveyance chain and an intermittent conveyance chain are provided on the frame, and a traction dog for each of the continuous conveyance chain and intermittent conveyance chain is provided on the slat plate; In the slat conveyor device, in which a selective hooking and unloading device for both the continuous conveyance chains and the intermittent conveyance chain of the two traction dogs is provided, the intermittent conveyance chain is interposed between the starting end and the terminal end of the continuous conveyance chain. The frame is equipped with a pusher that engages with a stopper of each conveyance chain at the transition portion from the continuous conveyance chain to the intermittent conveyance chain and from the intermittent conveyance chain to the continuous conveyance chain. Slut conveyor equipment.