JPH11263425A - Conveyor for tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyor whose accelerating and decelerating speed can be increased upon start or stop of a tray and in which the productivity of various kinds of articles to be conveyed is improved by using the tray. SOLUTION: Since a tray accelerating and decelerating motor 44 is driven by electrically synchronously with a conveying motor to forcedly accelerate and decelerate an accelerating and decelerating frame 41 in a conveying direction, a tray 11 clamped to the accelerating and decelerating frame 41 can be also forcedly accelerated and decelerated. The accelerating and decelerating speed of the tray can be increased more than that of the tray 11 depending only on the conveying motor. Accordingly, the conveying speed of the tray 11 is increased to decrease a line cycle and improve the productivity of various kinds of articles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray transport device for transporting various articles on a tray (including a pallet) when transporting the articles on a transport conveyor, and more particularly, to starting a transport conveyor. The present invention relates to a tray transport device that repeatedly stops.

[0002]

2. Description of the Related Art Conventionally, as a transfer device for transferring a sheet-like material 90 such as a wooden panel or a gypsum board, there is a roller-type conveyor device 91 of the type shown in FIG. As shown in the figure, a roller-type conveyor device 91 is mounted on a gantry 92,
A large number of drive rollers 93 are attached at predetermined intervals in the longitudinal direction along the transport direction, and by driving the drive rollers 93, the sheet-like material 90 placed on the tray 94 can be transported.

The drive roller 93 has both ends fixed to both sides of a drive shaft 96 pivotally supported by a bearing 95 on a gantry 92, and a sprocket 97 is fixed to one end of the drive shaft 96. The sprocket 97 is operatively connected by an endless chain 101 to a sprocket 100 fixed to an output shaft of a transport motor 99 installed on a floor 98. With this configuration, every time the sheet 90 is transported from one step to the next step, the transport motor 99 is driven and stopped, and the starting, transporting, and stopping of the tray 94 are repeated to process the sheet 90. Can be performed continuously.

[0004]

However, the above-mentioned roller-type conveyor device 91 still has the following problems to be solved. That is, the roller type conveyor device 9 described above
In order to improve the productivity of the sheet-like material 90 using the sheet No. 1, it is necessary to shorten the tact time for replacing the tray 94, and for that purpose, it is necessary to increase the acceleration / deceleration when the tray 94 starts and stops. . However, if the acceleration / deceleration exceeds a certain speed, the tray 94 slides on the drive roller 93, and there is a limit to increasing the acceleration / deceleration as it is.

In order to prevent the tray 94 from slipping with respect to the driving roller 93 when the tray 94 starts moving, μ
W> W / g · α (where μ is the coefficient of friction between the tray 94 and the driving roller 93, W is the weight of the tray 94, and α is the acceleration). Therefore, it is conceivable to increase the friction coefficient μ. However, the friction coefficient μ is not
Is a constant determined by the mutual materials, and cannot actually be so large. As described above, in the conventional roller-type conveyor device 91, it is difficult to increase the acceleration / deceleration at the time of starting and stopping the tray 94.
0 could not be improved in productivity.

[0006] The present invention has been made in view of the above circumstances, without starting the tray, without causing the slip of the tray.
It is an object of the present invention to provide a tray transport device capable of increasing acceleration / deceleration at the time of stoppage and improving productivity of various articles transported using the tray.

[0007]

According to the present invention, there is provided a semiconductor device comprising:
The tray transport device according to claim 1, further comprising a plurality of drive rollers rotationally driven by a transport motor, a transport conveyor capable of transporting the tray on which the articles are placed while being supported on the drive rollers, A tray clamp mechanism capable of detachably clamping the tray is mounted, and an acceleration / deceleration frame movable in the tray transport direction and driven in electrical synchronization with the transport motor to integrate the acceleration / deceleration frame and the tray. And a tray accelerating / decelerating motor that accelerates and decelerates. The tray transport device according to claim 2 is the tray transport device according to claim 1, wherein the acceleration / deceleration of the tray by driving the tray acceleration / deceleration motor is between the transport motor and the drive roller. A one-way clutch that slips when the acceleration / deceleration by the transport motor is exceeded.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

First, referring to FIG. 1 and FIG. 2, an overall configuration of a tray transport device A will be described. In this embodiment,
This shows a case where the tray transport device A is installed at a sheet-like material transfer station S that performs a sheet-like material transfer operation as the final step. That is, in the sheet transfer station S, after processing through a plurality of processes, a sheet-like sheet such as a gypsum board as an example of an article transferred to the tray supply conveyor 12 as an example of the transfer conveyor Thing 1
0 is removed from the tray 11 by the sheet-like material transfer device 13 and transferred to a sheet-like material take-out conveyor 14 arranged orthogonally to the tray supply conveyor 12, and the sheet-like material 10 is removed. After the transfer, the tray 11 is transported from the tray supply conveyor 12 to a tray dispensing conveyor 16 which is an example of a transport conveyor similarly arranged in series downstream of the tray supply conveyor 12.

As shown in FIG. 1, an ordinary tray transport conveyor 1 is located upstream of the tray supply conveyor 12.
5 are arranged in series.
The sheet-like material 10 to be transferred next is placed in a state of straddling the tray 5 and the tray supply conveyor 12.

Next, the configuration of each part of the tray transport device A having the above configuration will be described with reference to FIGS.
This will be described in detail with reference to FIGS. As shown in FIGS. 3 and 4, the tray supply conveyor 12 has conveyor frames 17, 18 extending in parallel with the tray conveyance line L on both sides of the tray conveyance line L, and base portions on top of the conveyor frames 17, 18. Are mounted in a cantilever shape by bearings 19 and 20 provided at the front end thereof, and are attached to roller drive shafts 21 and 22 whose tips extend toward the tray transport line L, and to the tips of the roller drive shafts 21 and 22, Driving rollers 23 and 24 for placing and supporting both sides of the tray 11 are provided. As described above, by supporting the drive rollers 23 and 24 in a cantilever shape, a central space 25 can be formed in the central portion of the tray supply conveyor 12, and the tray transport direction of the tray clamp mechanism 46 described later can be used. It becomes possible to move to.

As shown in FIG. 3, the roller drive shafts 21, 2
2 have sprockets 2
6, 27 are fixed. On the other hand, a long power transmission shaft 29 is laid on the floor surface 28 at a position aligned with the axis through which the roller drive shafts 21 and 22 pass, and sprockets 30 and 31 are fixed to both ends thereof. Have been. Sprockets 30 and 31 are endless chains 32 and 3 respectively.
3 are linked to each other. Power transmission shaft 2
9 is connected to a transfer motor 35 by a coupling 34.
It is linked and linked. Further, the roller drive shafts 21 and 22
The sprocket 2
In addition to the power transmission sprockets 36 and 37, power transmission sprockets 36 and 37 are attached.
7, all the other roller drive shafts 21, 22 can be rotationally driven. With the above-described configuration, when the transport motor 35 is driven, all the drive rollers 23 and 24 are synchronously driven to rotate, and by this rotational drive, the tray 11 on which the sheet 10 is placed is moved to the tray transport line. L can be conveyed.

As shown in FIGS. 3 and 4, the tray supply conveyor 12 includes a tray acceleration / deceleration device 38 for accelerating and decelerating the tray 11 in conjunction with the start / stop of the tray supply conveyor 12 described above. As shown in the figure, a long linear guide rail 39 extending in parallel along the tray transport line L is fixed to the inner side surface of the conveyor frame 17 of the tray supply conveyor 12, and is upstream of the linear guide rail 39. The side is also fixed to the inner surface of the conveyor frame 40 of the tray transport conveyor 15.

A long acceleration / deceleration frame 41 is slidably mounted on the linear guide rail 39, and a long rack 42 is formed on the lower surface of the acceleration / deceleration frame 41. On the other hand, on the floor surface 28 which is the upstream side of the tray supply conveyor 12, a motor installation base 43 is placed,
At the top of the motor installation base 43, a tray acceleration / deceleration motor 4 is provided.
4 are installed. Then, the tray acceleration / deceleration motor 4
A pinion 45 is fixed to the output shaft 4, and the pinion 45 is engaged with the rack 42.

As shown in FIG. 4, a tray clamp mechanism 46 for detachably holding the tray 11 is attached to a downstream portion of the upper surface of the rack 42. In the present embodiment, the tray clamp mechanism 46 has a bracket 47 protruding from the downstream portion of the upper surface of the rack 42, and a pair of clamp claws 48, 49 is oscillated on the upper portion of the bracket 47 symmetrically by pivots 50, 51. It is movably pivoted, and the end of the extension rod 52 of the clamp cylinder 53 attached to the bracket 47 is pivotally connected to the lower end extension 52 of one of the clamp claws 49. It is constituted by forming a pair of sector gears 54 and 55 that mesh with each other. Note that the clamp claws 48,
49 is in an open state indicated by a virtual line when not clamped, and is in a closed state indicated by a solid line when clamped, so that the front frame member 56 of the tray 11 can be reliably clamped.

After the clamping cylinder 53 is driven to clamp the front frame member 56 of the tray 11, the transport motor 35 is driven to drive the driving roller 23,
When transporting the tray 11 by rotating the tray 24, the tray 11 can be forcibly accelerated by driving the tray acceleration / deceleration motor 44 also in electrical synchronization. Therefore, even if the acceleration of the tray 11 is increased, the driving rollers 23,
It is possible to reliably prevent the occurrence of slippage between the tray 24 and the tray 11 at the time of starting, and to convey the tray 11 to the sheet transfer station S quickly and accurately.

On the other hand, in the sheet transfer station S, the driving of the transport motor 35 is stopped and the driving roller 2 is stopped.
When the transport of the tray 11 is stopped by stopping the rotation of the trays 3 and 24, the tray 11 can be forcibly decelerated by stopping the drive of the tray acceleration / deceleration motor 44 at the same time. Therefore, even if the deceleration of the tray 11 is increased, it is possible to reliably prevent the slippage between the drive rollers 23 and 24 and the tray 11 when stopping. Therefore, the tray 11 can be quickly and accurately conveyed to the sheet transfer station S by driving the tray supply conveyor 12.

As shown in FIG. 1, the tray discharging conveyor 16 located downstream of the sheet transfer station S is also substantially the same as the tray accelerating / decelerating device 38 and the tray clamp in the tray supplying conveyor 12. A tray acceleration / deceleration device 57 and a tray clamp mechanism 58 corresponding to the mechanism 46 are provided. Since the configurations of the tray acceleration / deceleration device 57 and the tray clamp mechanism 58 are the same as those of the tray acceleration / deceleration device 38 and the tray clamp mechanism 46, the same components are denoted by the same reference numerals.

Further, in this embodiment, as shown in FIG. 5, an outer ring 59a of a one-way clutch 59 as a tuning mechanism is fixedly fitted on the inner peripheral surface of the sprocket 26 (the same applies to the sprocket 27). And one-way clutch 5
The roller drive shafts 21 and 22 are fixed to the inner ring 59b of the No. 9 by a key.

With this configuration, when the transport motor 35 is driven, the drive rollers 2 fixed to the roller drive shafts 21 and 22 via the sprockets 26 and 27 and the one-way clutch 59 by the endless chains 32 and 33 are normally used.
3, 24 rotate, and the rotation accelerates / decelerates the tray 11. On the other hand, the tray acceleration / deceleration motor 44
Is accelerated / decelerated via the acceleration / deceleration frame 41. When the acceleration / deceleration is faster than the acceleration / deceleration of the tray 11 driven by the transport motor 35,
That is, when the synchronism is not achieved, the one-way clutch 59
The outer ring 59a slips with respect to the inner ring 59b. Accordingly, interference between the transport motor 35 and the tray acceleration / deceleration motor 44 can be prevented.

Another configuration in the illustrated embodiment will be described. As shown in FIG. 1, a tray transport conveyor 60 is provided downstream of the tray dispensing conveyor 16, and this tray transport conveyor 60 is provided. Has the same configuration as the conventional roller-type conveyor device 91 shown in FIG.

As shown in FIGS. 1 and 2, the sheet-like material removing conveyor 1 from the tray supplying conveyor 12 is used.
Sheet transfer device 13 for transferring sheet 10 to 4
Is a portal frame 61 installed on a tray supply conveyor 12 and a sheet-like object removal conveyor 14, and a portal frame 6
A carriage 63 that moves along a traveling rail 62 on the upper frame 1 in a direction orthogonal to the tray transport line L, an elevating shaft 64 that is attached to the trolley 63 so as to be able to move up and down, and a number of And a suction board 66 having a suction pad 65.

Next, the sheet transfer operation in the sheet transfer station S provided with the tray transfer device A having the above-described configuration will be described mainly with reference to FIG. As shown in FIG. 1, when the sheet-like material 10 reaches a standby position where it is supported across the tray supply conveyor 12 and the tray transport conveyor 15, the tray of the tray acceleration / deceleration device 38 of the tray supply conveyor 12 is moved to the standby position. The clamp mechanism 46 automatically clamps the front frame member 56 of the tray 11.

Next, when the transfer operation of the preceding sheet material 10 at the sheet material transfer station S is completed, a sheet supply signal is transmitted from a control device (not shown) to the transport motor 35 of the tray supply conveyor 12 and Output to the tray acceleration / deceleration motor 44, the two motors 35, 44 are electrically driven in synchronization with each other.
4 and the movement of the acceleration / deceleration frame 41 in the transport direction are performed simultaneously.

At this time, when only the transport motor 35 is driven to rotate the drive rollers 23 and 24 to start the tray 11, when the acceleration exceeds a certain acceleration, the drive rollers 23 and 24 and the tray 11 Slippage occurs between them and the acceleration cannot be increased beyond a certain level. However, in the present embodiment, the acceleration / deceleration frame 41 is forcibly accelerated in the transport direction by driving the tray acceleration / deceleration motor 44 in electrical synchronization with the transport motor 35. The tray 11 clamped to the frame 41 can also be integrally and forcibly accelerated, and the acceleration of the tray 11 can be made larger than the acceleration of the tray 11 when only the transport motor 35 is driven.

Thereafter, the tray 11 is transported to the transfer position of the sheet transfer station S by the drive of the transport motor 35 and the tray acceleration / deceleration motor 44, and stopped at the transfer position. As described above, in the supply operation of the tray 11, the acceleration of the tray 11 can be increased, so that the transfer speed of the tray 11 can be increased to reduce the line tact, and the productivity of the sheet-like material 10 can be improved. .

In the above-described drive control of the transport motor 35 and the tray acceleration / deceleration motor 44, if the acceleration of the tray acceleration / deceleration motor 44 becomes larger than the acceleration / deceleration of the transport motor 35, this acceleration difference causes There is a possibility that both motors 35 and 44 may interfere with each other.
However, in the present embodiment, as shown in FIG. 5, a one-way clutch 59, which is an example of a tuning mechanism, is interposed between the sprockets 26 and 27 and the roller drive shafts 21 and 22, so that the tray If the acceleration of the deceleration motor 44 exceeds the acceleration of the transport motor 35, the one-way clutch 59
Is slipped, and interference between the transport motor 35 and the tray acceleration / deceleration motor 44 can be prevented.

After the tray 11 is conveyed to the transfer position of the sheet transfer station S in the manner described above, the sheet transfer device 13 is operated to operate the tray supply conveyor 12.
The sheet-like material 10 is lifted from the upper tray 11 by the suction disk 66 and moved to the sheet-like material removal conveyor 14, and then the sheet-like material 1 is transferred to the sheet-like material removal conveyor 14.
Place 0.

On the other hand, the tray 11 from which the sheet-like material 10 has been removed is driven by the transfer motor 35 and the tray acceleration / deceleration motor 44 which are provided on the tray dispensing conveyor 16 in the same manner. Conveyed toward. Also in this transfer operation, the tray acceleration / deceleration motor 41 is driven in electrical synchronization with the transfer motor 35 to forcibly accelerate the acceleration / deceleration frame 41 in the transfer direction. Can be forcibly accelerated, and the acceleration of the tray 11 when only the transport motor 35 is driven can be increased.
Can be made larger than the acceleration.

As described above, also in the payout operation of the tray 11, the acceleration of the tray 11 can be increased, so that the conveying speed of the tray 11 can be increased to shorten the line tact, thereby improving the productivity of the sheet-like material 10. can do.

In the above-described supply and discharge operations of the tray 11, although not shown, the tray acceleration / deceleration motor 44 is driven in synchronization with the transport motor 35 to move the acceleration / deceleration frame 41 in the transport direction. The deceleration of the tray 11 can be increased by forcibly decelerating the tray 11 clamped to the acceleration / deceleration frame 41, so that the transport speed of the tray 11 can be reduced. It is possible to shorten the line tact by raising, and to improve the productivity of the sheet-like material 10. Also,
Also in this deceleration control, by using a tuning mechanism as shown in FIG. 5, when the deceleration of the tray acceleration / deceleration motor 44 exceeds the deceleration of the transport motor 35, the one-way clutch 59 slips, Interference between the transport motor 35 and the tray acceleration / deceleration motor 44 can be prevented.

As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. It also includes other embodiments and modifications that can be considered within the scope of the matters described.

[0033]

According to the first and second aspects of the present invention, the tray acceleration / deceleration motor is driven in synchronism with the transport motor to forcibly accelerate / decelerate the acceleration / deceleration frame in the transport direction. Therefore, the tray clamped on the acceleration / deceleration frame can also be forcibly accelerated / decelerated, and the acceleration / deceleration can be made larger than the acceleration / deceleration of the tray when only the transport motor is used. Therefore, the tact time can be shortened by increasing the transfer speed of the tray, and the productivity of various articles can be improved. In the tray transport device according to claim 2, when the acceleration / deceleration of the tray acceleration / deceleration motor exceeds the acceleration / deceleration of the transport motor, the one-way clutch slips, and the transport motor and the tray acceleration / deceleration motor are disengaged. Interference can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a tray transport device according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II in FIG. 1;

FIG. 3 is a view taken along the line II-II in FIG. 1;

FIG. 4 is an enlarged side view of a tray acceleration / deceleration device and a tray clamp mechanism.

FIG. 5 is a front view of the tuning mechanism.

FIG. 6 is a cross-sectional view of a conventional conveyor.

[Explanation of symbols]

Reference Signs List A tray transport device L tray transport line S sheet-like material transfer station 10 sheet-like material 11 tray 12 tray supply conveyor 13 sheet-like material transfer device 14 sheet-like material take-out conveyor 15 tray transport conveyor 16 tray discharge conveyor 17 Conveyor frame 18 Conveyor frame 19 Bearing 20 Bearing 21 Roller drive shaft 22 Roller drive shaft 23 Drive roller 24 Drive roller 25 Central space 26 Sprocket 27 Sprocket 28 Floor surface 29 Power transmission shaft 30 Sprocket 31 Sprocket 32 Endless chain 33 Endless chain 34 Cup Ring 35 Transport motor 36 Power transmission sprocket 37 Power transmission sprocket 38 Tray acceleration / deceleration device 39 Linear guide rail 40 Conveyor frame 41 Acceleration / deceleration frame 4 2 Rack 43 Motor installation frame 44 Tray acceleration / deceleration motor 45 Pinion 46 Tray clamp mechanism 47 Bracket 48 Clamp claw 49 Clamp claw 50 Axis 51 Axis 52 Lower end extension 53 Clamp cylinder 54 Sector gear 55 Sector gear 56 Front frame member 57 Tray acceleration / deceleration device 58 Tray clamp mechanism 59 One-way clutch 59a Outer ring 59b Inner ring 60 Conveyor for tray transfer 61 Portal frame 62 Running rail 63 Bogie 64 Elevating shaft 65 Suction pad 66 Suction plate

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Seiichi Takada 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka New Nippon Steel Corporation Engineering Division

Claims (2)

[Claims] 1. A transport conveyor, comprising: a plurality of drive rollers rotatably driven by a transport motor; a transport conveyor capable of transporting a tray on which articles are placed supported on the drive roller; An acceleration / deceleration frame movable in the direction of transport of the tray; and an electrically driven synchronous motor driven by the transport motor to integrally apply the acceleration / deceleration frame and the tray. A tray conveying device comprising a tray acceleration / deceleration motor for decelerating. 2. A one-way clutch that slips between the transport motor and the drive roller when the acceleration / deceleration of the tray by the drive of the tray acceleration / deceleration exceeds the acceleration / deceleration of the transport motor. The tray conveying device according to claim 1, further comprising: