JPH0350090Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a conveyor device that constitutes a production line for, for example, a video tape recorder.

"Prior art" Conventionally, as shown in Japanese Patent Application Laid-Open No. 53-78582,
The conveyor is equipped with a conveyor that supports the conveyed object with a rotatably provided roller between two parallel conveyor chains, and a high-speed transfer section in which the roller rotates is provided in the middle of the conveyor, and the object is rotated downstream of the high-speed transfer section. A technique has been developed to temporarily stop the conveyor and perform various tasks during that time.

"Problems to be Solved by the Invention" In the prior art, the supporting surface of the conveyor needs to be formed of rotatable rollers so that the conveyed object can move freely relative to the supporting surface of the conveyor. It is difficult to transfer the objects to be transported to the high-speed transfer zone in an appropriate transport posture and at a predetermined interval, and therefore the timing of transfer to the stopping work position is also unstable, making it impossible to obtain a constant stopping work time. There is a risk of a subsequent object colliding with the object being transported while it is being stopped, and the object being transported at high speed to the stopping work position is sent out from the stopping work position at a lower speed, so the stopping work time must be sufficient. In addition to not being able to obtain
There were problems such as the need to provide a large distance between the objects to be transported.

``Means for Solving the Problems'' However, the present invention includes a pair of endless conveyor chains driven at a constant speed, supports the conveyed object with support rolls rotatably attached to the conveyor chains,
A conveyor device that can temporarily stop a conveyed object mid-transfer includes a conveyor roll that rotates at a higher speed than a conveyor chain under a predetermined load, and rolls are rotated at a predetermined interval from the start end to the end end above one conveyor chain. The conveyance rolls are provided, and the conveyed object is always held between the conveyance roll and the support roll from above and below, while the conveyed object is held between the front and rear of the conveyor chain, positioned, and forced at the same speed as the conveyor chain. A high-speed transfer section is provided within the forced transfer section in which the transfer pin is removed from the conveyed object and the object is transferred at high speed by conveyance rolls. It is equipped with a stop part.

"Operation" Therefore, according to the present invention, it is possible to forcibly transport the transported object to the high-speed transport section at the same speed as the conveyor chain while maintaining a proper transport posture and a predetermined interval using the transport pin, and By canceling the forced transfer by the conveyor pins for the conveyed object that has reached the transfer section, it is possible to immediately switch to high-speed transfer, and also to increase the forced transfer speed of the conveyed object by the conveyance roll to a stop provided in the high-speed transfer section. Since the transfer can be carried out at a faster speed, the timing of transfer to the stopping section is constant, a constant stopping work time can be obtained for each object to be transported, and the stopping work can be performed appropriately. Since the conveyance rolls can send out the conveyed objects at the same speed as the transport speed from the stop section to here, sufficient stopping time can be obtained, and the distance between the conveyed objects can be reduced compared to the conventional method, improving work efficiency. It is possible to improve the

"Embodiments" Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Figure 1 is an explanatory diagram of transportation, Figure 2 is a perspective view of the exterior,
FIG. 3 is an enlarged cross-sectional view taken along the line A-A in the previous figure, in which the forced conveyor frame 2 is attached to the upper side via the support column 1.
Furthermore, the aging conveyor frame 3 is horizontally suspended in multiple stages on the lower side.

It is equipped with a pair of endless forced conveyor chains 5 and 6 which are forced conveyors for moving a rectangular plate-shaped wooden pallet 4, which is an object to be conveyed, at a constant speed. In addition to being stretched over the forced conveyor frame 2, the support rolls 9 on which the pallets 4 are placed are freely supported by the chains 5 and 6 in a staggered manner at equal intervals, and the upper ends are in contact with the front and rear sides of the pallets 4 in the direction of movement. Place the conveyor pin 10 in contact with the chains 5 and 6 on the bracket 1.
A guide rail 12 is provided to lift and support the pin 10 to a substantially constant height, and a spring 13 for lowering the pin 10 is wound around the pin 10, and the pin 10 is mounted on support rolls 9. Four pins 10 raised and supported by a guide rail 12 are brought into contact with the rear end of the pallet 4 in the advancing direction, and the pallet 4 is moved at a constant speed by driving forced conveyor chains 5 and 6. In addition, test power terminals 14 and 15 are arranged between the chains 5 and 6 in the direction of movement of the pallet 4, and the terminals 14 and 15 are always in contact with the conductive rails 16 and 16 on the lower surface of the pallet 4, so that the test power supply terminals 14 and 15 are arranged between the chains 5 and 6, and the terminals 14 and 15 are always in contact with the conductive rails 16 and 16 on the lower surface of the pallet 4. Power is connected.

Furthermore, it is equipped with a pair of endless aging conveyor chains 17 and 18, which are aging conveyors for moving manufactured products and performing use tests.
is stretched over the aging conveyor frame 3, and supporting rolls 21 on which the pallets 4 are placed are freely supported by the chains 17 and 18 in a staggered manner at equal intervals. The pallet 4 is loaded and moved, and the manufactured finished products assembled on the upper forced conveyor chains 5 and 6 are moved by the lower aging conveyor chains 17 and 18 while being operated under actual usage conditions. ing.

It is also provided with a lifter 22 that transfers the pallet 4 at the end of the forced conveyor chains 5, 6 to the start end of the aging conveyor chain 17, 18, and
6. An elevating table 23 that receives the pallet 4 that has reached the terminal end and supplies the pallet 4 to the starting ends of the lower chains 17 and 18 is provided so as to be movable up and down, and the elevating table 23 is raised to complete the production from the forced conveyor chains 5 and 6. At the same time as receiving the product, the lifting platform 23 is lowered to supply the finished product to the aging conveyor chains 17 and 18, and a use test is performed using this space below the starting end of the forced conveyor chains 5 and 6. The system is configured to send out the manufactured finished product.

It is also provided with a plurality of flexible transport rolls 24, which are high-speed transport means for moving the pallet 4 at a higher speed than the forced conveyor chains 5, 6, and one of the forced conveyor chains 5 on the opposite side to the side where the worker is located.
Above, the rolls 24 are arranged at regular intervals in the tensioning direction.
The rolls 2 are arranged so that at least two or more rolls 24 are in sliding contact with one pallet 4.
At the same time, the conveyor roll 24 is pressed from above against the upper surface of one side of the pallet 4 placed on the forced conveyor chains 5 and 6 via the support roll 9, and the pallet 4 on the chain 5 is It is held between rolls 24 from above.

Furthermore, the conveyor roll 24 is attached to a bearing plate 25.
The plate 25 is attached to a pallet guide 26 fixed to the conveyor frame 2 through bolts 27 and elongated holes 28 so that the height thereof can be adjusted freely, and the pressing force of the conveyor roll 24 against the pallet 4 is configured to be variable. A sprocket 30 is provided coaxially with the roll 24 to be connected to the transport roll 24 under a constant driving load through a papda clutch type torque clutch 29, and a high speed transport motor 33 is connected to the sprocket 30 through chains 31, 32, etc. Upper and lower chain guides 34, 34 are provided on the bearing plate 25 to interlock and guide the chain 31, and when the conveyor pin comes off from the guide rail 12 and descends, forced conveyance by the forced conveyor chains 5, 6 is provided. is released,
The pallet 4 is configured to be moved at high speed by driving the transport rolls 24.

On the other hand, as shown in FIG.
6, the pallet 4b is stopped at the start of high-speed movement, and the pallet 4a at the end of the guide rail 12 is forced by two-thirds, and the remaining one-third is moved at high speed to contact the stopper 36, and the air cylinder 3
7, the pallet 4c is stopped at the automatic working position by a second stopper 38, which is raised and lowered by a second stopper 38, and two positioning pins 41, which are positioning members that individually connect the air cylinders 39 and 40 and raise and lower them individually,
41 is provided, and the lower end thereof is engaged in the positioning holes 42, 42 of the pallet 4c stopped by the second stopper 38 by raising and lowering the pins 41, 41 from above. Further, the pallet 4d is stopped at the end of high-speed movement by the third stopper 44 which is raised and lowered by the air cylinder 43, and the pallet 4e is again moved at a constant speed from the starting end position 12b of the guide rail 12. is moved at a high speed for two-thirds and at a constant speed for the remaining one-third, and the pallet e that has shifted to constant speed movement again is detected by the limit switch 45, and the pallets 4b and 4c at the respective stoppers 36, 38, and 44 positions are detected. , 4d limit switch 4
6, 47, and 48, respectively.

Then, as shown in FIG.
8, 44 and the positioning pin 41 are arranged above the forced conveyor chain 5 on one side on the side where the transport roll 24 is arranged, and the positioning pins 41, 41 and the stopper 38 of this part are mounted on the unit frame 49. Attachment, the pins 41 and 41 are actuated separately by air cylinders 39 and 40 to raise and lower only the pin 41 from above the pallet 4, and the terminal position 12a of the guide rail 12 is
When the conveyance pin 10 is lowered between the start position 12b and the forced conveyance by the forced conveyor chains 5 and 6 is released, the pallet 4a is moved by the conveyor roll 24.
~4c is moved in a free-flow working state, and
The difference between the moving time of the forced conveyor chains 5 and 6 and the feeding time by the conveyor roll 24 is set as the stopping work time, and the positioning pin 41 is used to move the pallet 4c.
is configured to stop at a fixed position for a set time.

Further, FIGS. 4 to 6 show a part of the manufacturing process conveyor of the video tape recorder 50.
Conveyance roll 2 is placed in the middle of forced conveyor chains 5 and 6.
4..., and conveyor chains 5 and 6.
A lifting cylinder 5 is attached to a support arm 51 extending upward.
2 and lift guides 53, 53, an automatic test machine 54 is suspended so as to be able to rise and fall freely, and a tape insertion machine 55 and a tape take-out machine 56 for loading and unloading the test video tape into and out of the video tape recorder 50 are connected to the automatic machine 5.
4, the constant speed movement of the conveyor chains 5 and 6 is interrupted in the middle of the manual operation process on the forced conveyor formed by the conveyor chains 5 and 6, and the movement time difference between the conveyor rolls 24 and The pallets 4c are stopped at a fixed position by the stoppers 38 and the positioning pins 41, the test videotape is loaded from the insertion machine 55 onto the deck of the tape recorder 50, and the automatic machine 54 is lowered and approached to the deck of the tape recorder 50. The input and output of the electric circuit is measured and checked, and the extraction machine 56
The videotape for testing is taken out from the tape recorder 50 and handed over to the conveyor chains 5 and 6 in the subsequent process, and a free flow process using the conveyor roll 24 is incorporated in the middle of the manual work process performed by the conveyor chains 5 and 6, thereby eliminating the manual work. The manufacturing process is configured by alternately combining automatic machine 54 operations.

The present embodiment is constructed as described above, and as shown in the cycle diagram of FIG. 7, when the absence of the pallet 4e in the subsequent process is confirmed by turning on the limit switch 45, the third stopper 44 is raised to stop the pallet 4d. The transport roller 24 performs two-thirds rapid forwarding, and the transport pin 10 performs one-third forced transport, which is transferred to the forced conveyor chains 5 and 6, and the positioning pin 41 is raised by lowering the third stopper 44, and then the second The stopper 38 is raised to send out the pallet 4c. At this time, the limit switch 48 of the third stopper 44 is turned on, and the limit switch 48 of the second stopper 38 is turned on.
7 is turned off, lowering the second stopper 38,
The first stopper 36 is raised to move the pallet 4b, and the limit switch 46 is turned off to lower the first stopper 36 to receive the pallet 4a from the previous process, and the positioning pin 41 is lowered to keep the pallet 4c at a fixed position. The period from when the positioning pin 41 is lowered to when it is raised is used as a stop operation time, and free-flow operation using an automatic machine 54 or the like is performed.

In addition, the stopping work time was set by setting the difference between the moving time of the conveyor chain 56 and the feeding time by the conveyor roll 24 as 27 seconds, and one cycle of the free flow work process was configured as 27 seconds. , 44, the distance between the end and the end of the guide rail 12, or the feed speed of the conveyor roll 24, an arbitrary stoppage time can be obtained, and the conveyor roll 2
By constantly rotating the pallet 4 and moving the pallet 4 between the conveyor chains 5 and 6 and their rolls 24, it is possible to control the high-speed movement of the pallet 4 using only the conveyor rolls 24, and the conveyor chains 5 and 6
The stoppers 36, 38, 44 can be easily switched between forced movement of the transport roll 24 and free flow movement of the transport roll 24.
Even if the pallets 4b, 4c, 4d collide with each other, the conveyance rolls 24 prevent this lifting. Moreover, since the conveyor roll 24 and the stoppers 36, 38, 44, etc. are arranged in a biased manner on the upper side of the conveyor chain 56 on the side opposite to the position where the operator performs manual work, the arrangement of the roll 24, etc. Easy to attach and detach, and stopper 36, 38, 4
4, etc. can be easily changed in a different manner, and the two positioning pins 41,
By raising and lowering the pallets 41 individually using air cylinders 39 and 40, the thrust of one pin 41 serving as a reference is increased, and the pallet 4 is fixed by a positioning method that follows a single reference point, reducing the need for precision machining. Even with wooden pallets 4, precise positioning accuracy can be obtained.

Furthermore, FIGS. 8 and 9 show modified examples of the support structure for the conveyance roll 24, in which the high-speed conveyance motor 33
The base end of the tension arm 57 is supported coaxially with the sprocket 30 which is interlocked and connected via the chain 31, the conveyor roll 24 and the torque clutch 29 are pivotally supported at the tip of the arm 57, and the chain 58 and the clutch are connected to the sprocket 30. 29 etc., the rolls 24 are interlocked and connected at a torque lower than a set torque, and a tension spring 59 is connected to the arm 57, and a stopper 60 is provided for regulating the amount of swing of the arm 57. The pallet 4 is moved at high speed by the rotation of the conveyor roll 24, which is elastically supported.

Furthermore, FIG. 10 shows a modification of the conveyance pin 10, in which a conveyance cam body 61 is rotatably provided coaxially with the support rolls 9 of the forced conveyor chains 5, 6.
The cam body 61 is formed with a stepped portion 62 that contacts the front and rear ends of the pallet 4 and a protrusion 63 that makes sliding contact with the guide rail 12. The step part 62 is brought into contact with the end surface of the pallet 4, and the conveyor chain 5,
6 forcibly moves the pallet 4, and when the protrusion 63 disengages from the guide rail 12, the step 62 also disengages, supporting the pallet 4 in a free flowing state.

"Effect of the invention" As is clear from the above embodiments, the present invention has a pair of endless conveyor chains 5, 6 driven at a constant speed.
In the conveyor device, the conveyed object 4 is supported by support rolls 9 rotatably attached to the conveyor chains 5 and 6, and the conveyed object 4 can be temporarily stopped during transportation. Below, conveyor rolls 24 are provided which are rotated at a higher speed than the conveyor chains 5 and 6, and the conveyor rolls 24 are arranged at predetermined intervals from the start end to the end end above one of the conveyor chains 5, and the conveyed objects 4 are constantly transported by the conveyor rolls 24.
4 and support rolls 9 from above and below, while the conveyor chains 5 and 6 sandwich the conveyed object 4 from the front and back, positioning it and forcibly transferring it at the same speed as the conveyor chains 5 and 6. pin 1
0, the transport pin 10 is removed from the transported object 4 within the forced transport section, and the transport roller 2
4, a high-speed transfer section is provided for transferring at high speed, and a stopping section for the conveyed object 4 is provided within the high-speed transfer section. can be forcibly transferred to the high-speed transfer section at the same speed as the conveyor chains 5 and 6 while maintaining the same speed, and by releasing the forced transfer by the transfer pin 10 for the conveyed object 4 that has reached the high-speed transfer section, the object can be transferred immediately at high speed. In addition, since the transport rolls 24 can transport the transported object 4 to the stop section provided in the high-speed transport section at a speed faster than the forced transport speed, the timing of transport to the stop section is constant, and each object It is possible to obtain a constant stop work time for each transport body 4, and to perform the stop work appropriately.Furthermore, after the stop work time has elapsed, the speed at which the transported object 4 is transferred from the stop part to here by the transport roll 24 is increased. Since the conveyor can be fed out at the same speed as the conveyor, sufficient stopping time can be obtained, and the distance between the conveyed objects 4 can be reduced compared to the conventional method, which has the remarkable effect of improving work efficiency. .

[Brief explanation of drawings]

FIG. 1 is a transport explanatory diagram showing an embodiment of the present invention;
Fig. 2 is an external perspective view, Fig. 3 is an enlarged sectional view taken along the line A-A in the previous figure, Figs. FIG. 8 to FIG. 10 are partial explanatory diagrams showing an embodiment. 4... Pallet (object to be transported), 5, 6... Forced conveyor chain (forced conveyor), 9... Support roll, 10... Conveyance pin, 24... Conveyance roll (high speed conveyance means), 38... Stopper .

Claims (1)

[Scope of utility model registration request] It is equipped with a pair of endless conveyor chains 5 and 6 driven at a constant speed, and supports the conveyed object 4 with support rolls 9 rotatably attached to the conveyor chains 5 and 6. The conveyor device is equipped with a conveyor roll 24 that rotates at a higher speed than conveyor chains 5 and 6 under a predetermined load, and one conveyor chain 5
Above, the conveyor rolls 24 are arranged at predetermined intervals from the starting end to the terminal end, and the conveyed object 4 is always held between the conveying rolls 24 and the support rolls 9 from above and below, while the conveyor chains 5 and 6 A transport pin 10 is provided for sandwiching the body 4 from the front and back, positioning it, and forcibly transporting it at the same speed as the conveyor chains 5 and 6. A conveyor device characterized in that a high-speed transfer section is provided in which the object is transferred at high speed by a transfer roll 24, and a stop portion for the conveyed object 4 is provided within the high-speed transfer section.