JPH0632629A - Device for reciprocatively transporting platy material - Google Patents

Abstract

PURPOSE:To eliminate backlash in reciprocatively transporting plate glass, etc. CONSTITUTION:Driving pulleys 7 and 8 are equipped with one-way power transmission mechanisms 9 and 10 such as ratchet mechanisms having mutually opposite power transmission directions and power transmission to these one-way transmission mechanisms 9 and 10 is carried out through driving boxes 11 and 12. Driving power of a motor 13 is directly transmitted to the driving box 11 and driving power is transmitted from the driving box 11 through a coupling 14 and a line shaft 15 to the driving box 12. A metal belt 9 is hung between guide pulleys 18... and driving pulleys 7 and 8 in a closed loop state. The metal belt 19 is brought into contact with a pulley 6 for driving rolls under pressure by a pressing roller 20 and a transporting roll 5 is normally or reversely rotated by the travel of the metal belt 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reciprocating sheet glass in, for example, a heating furnace.

[0002]

2. Description of the Related Art When a small lot (a small amount of production) of flat glass products is produced, a device for ensuring a necessary furnace length by reciprocating the flat glass in a short heating furnace is provided. Proposed as US Pat. No. 4,133,667. As shown in FIG. 3, the schematic configuration of this prior art is as follows.
Drive pulleys 103 and 104 which can be rotated by 02 are arranged, the belt 106 is looped around the drive pulleys 103 and 104 and the guide pulleys 105, and a plurality of conveying rollers 107 are pressed against the belt 106. The transport roller 107 is rotated by the traveling of 106, and the plate glass G placed on the transport roller 107 is transported.

In the above prior art, the motor 101
When the plate glass G is moved in the A direction by rotating the drive pulley 103 with, the other motor 102 is caused to act as a brake, and the motor 102 rotates the drive pulley 104 in the arrow direction with the plate glass. When G is moved in the B direction, the other motor 101 acts as a brake to prevent the belt 106 from being stretched (loosened), eliminate backlash when the traveling direction is reversed, and eliminate the glass sheet G. We are trying to prevent scratches.

[0004]

According to the above-mentioned conventional device, damage due to backlash can be prevented, but two motors are required, and when one motor is being driven, the other motor always serves as a brake. Since it works, there is a lot of power waste, and an expensive servo motor or brake motor must be used to smoothly switch between normal and reverse rotation of the motor.

[0005]

In order to solve the above-mentioned problems, the present invention provides a reciprocating conveying device in which a conveying roll is rotated by a traveling belt that is looped between a pair of driving members. A unidirectional power transmission mechanism is provided for each of the two unidirectional power transmission mechanisms, and the unidirectional power transmission mechanisms have their power transmission directions reversed, and the unidirectional power transmission mechanisms are connected by a line shaft or the like so as to be driven by a single motor.

[0006]

The forward rotation of the motor is transmitted to one drive pulley through one one-way power transmission mechanism and is not transmitted to the other drive pulley, and the reverse rotation of the motor is transmitted through the other one-way power transmission mechanism. Is transmitted to the other drive pulley and not to one drive pulley.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of a reciprocating transfer device for a plate-like body according to the present invention, and FIG. 2 is a diagram showing a schematic configuration of the reciprocating transfer device. In the embodiment, a transfer device 2 is installed in a heating furnace 1 for plate glass. It shows an example of arranging.

The conveying device 2 has a pair of support plates 3 and 4 which are spaced apart from each other in the heating furnace 1 in the front-rear direction, and conveying rolls 5 are rotatably mounted between the support plates 3 and 4. The transport rolls 5 have their axes arranged in a direction orthogonal to the transport direction of the sheet glass G, and a roll driving pulley 6 is fixed to the end of the shaft of the transport rolls 5 protruding from the support plate 3.

On the other hand, on the side of the heating furnace 1 where the support plate 3 is arranged, a pair of drive pulleys 7 and 8 which are left and right are arranged apart from each other. These drive pulleys 7 and 8 are provided with one-way power transmission mechanisms 9 and 10 such as a ratchet mechanism. As shown in FIG. 2, these unidirectional power transmission mechanisms 9 and 10 have opposite directions in which they can transmit power to each other.

Power is transmitted to the one-way power transmission mechanisms 9 and 10 by a drive box 11 having a bevel gear or the like built-in.
Via 12. Then, the driving force of the motor 13 is directly transmitted to the drive box 11, and the drive box 1
Driving force is transmitted from the drive box 11 to the motor 2 via the coupling 14 and the line shaft 15. In the illustrated example, power is further transmitted from the drive box 12 to another reciprocating transfer device via the coupling 16 and the line shaft 17.

Further, guide pulleys 18 ... Are arranged on the side of the support plate 3, and a metal belt 19 as a running belt is looped between these guide pulleys 18 ... And the drive pulleys 7 and 8 in a closed loop shape (endless shape). The metal belt 19 is pressed against the roll driving pulley 6 by the pressing roller 20 so that the transport roll 5 rotates in the forward or reverse direction when the metal belt 19 travels.

Further, a tension roller 21 is arranged between the drive pulleys 7 and 8. This tension roller 21
The spring 22 having an elastic force (F) constantly applies a constant tension force (F / 2) to the metal belt 19.

In the above, when the motor 13 is normally rotated,
Power is transmitted to the unidirectional power transmission mechanisms 9 and 10 via the drive boxes 11 and 12, respectively.
0 idles, the driving force is transmitted only to the drive pulley 7, the drive pulley 7 rotates in the direction of the arrow, the metal belt 19 travels, the transport roller 5 rotates, and the plate glass G on the transport roller 5 moves in the A direction. Moving.

When the motor 13 is rotated in the reverse direction, power is similarly transmitted to the unidirectional power transmission mechanisms 9 and 10 via the drive boxes 11 and 12, but this time the unidirectional power transmission mechanism 9 idles. , The driving force is transmitted only to the drive pulley 8, and the drive pulley 8 rotates in the direction of the arrow to move the metal belt 19
Runs in the opposite direction to the above, the transport roller 5 rotates, and the plate glass G on the transport roller 5 moves in the B direction.

In both the forward rotation and the reverse rotation, the tension roller 21 causes the metal belt 19 to rotate.
Since a constant tension acts on the backlash, backlash does not occur when the rotation direction is reversed. When only one of the pulleys 7 and 8 is a driving pulley and the other is a driven pulley, the tension roller 2 is interposed between the pulleys 7 and 8.
1 cannot be placed. That is, temporarily, the pulley 7 is used as a drive pulley, and the plate glass G is moved to the B
If you try to move it in the same direction, the tension roller 21
Rises against the spring 22, and a stable traveling speed cannot be obtained.

In the embodiment, the pulley is used as the driving member, the metal belt is used as the running belt, and the line shaft is used as the connecting member. However, instead of the pulley, a sprocket is used.
A chain may be used instead of the metal belt, and a gear train or the like may be used instead of the line shaft. Further, in the embodiment, the roll driving pulley 6 is directly rotated by the belt 19, but a plurality of roll supporting rollers are arranged along the direction of the belt 19 and the roll supporting rollers are conveyed onto the roll supporting rollers. You may make it mount the edge part of the roll 5 and may transmit driving force to the conveyance roll 5 via a roll support roller. By doing so, the transport roll 5 can be independently taken out in the axial direction, and can be easily replaced when the roll is damaged. Furthermore, the support of the transport rolls 5 is made such that the roll support rollers are positioned between the transport rolls 5, and the two rolls adjacent to each other are commonly supported by the roll support rolls, and the two transport rolls are simultaneously supported. By transmitting power,
The rotation speeds of the transport rolls 5 can be equalized.

[0017]

As described above, according to the present invention,
The driving force of a single motor is transmitted to a pair of driving members via a line shaft, etc., and each of these driving members is provided with a one-way power transmission mechanism.
When the motor rotates in the reverse direction, the power is transmitted to the other drive member, and when the power is transmitted to the one (other) drive member, the power is not transmitted to the other (one) drive member. Since the belt (chain) is prevented from slackening by the single drive source, it is possible to reciprocate the traveling belt looped between the pair of drive members with a single drive source without causing backlash. It is possible to prevent damage due to backlash when a plate glass or the like is conveyed by a roller which is pressed against a traveling zone and rotates.
Further, since the driving force of a single motor is transmitted to a plurality of driving pulleys via a line shaft or the like, it is possible to add a reciprocating conveyance device unit without increasing the number of driving sources.

[Brief description of drawings]

FIG. 1 is a perspective view of a reciprocating conveyance device for a plate-like body according to the present invention.

FIG. 2 is a diagram showing a schematic configuration of the reciprocating transfer device.

FIG. 3 is a diagram showing a schematic configuration of a conventional reciprocating transfer device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heating furnace, 2 ... Conveying device, 3, 4 ... Support plate, 5 ... Conveying roll, 7, 8 ... Driving pulley, 9, 10 ... One-way power transmission mechanism, 11, 12 ... Driving box, 13 ... Motor, 1
5 ... line shaft, 21 ... tension roller, G ... plate glass.

Claims (1)

[Claims] 1. A reciprocating conveyance device for a plate-shaped body, wherein a plurality of conveyance rolls on which a plate-shaped body such as a plate glass is placed are rotated in forward and reverse directions by a traveling band that is looped between a pair of drive members. In the above, each of the driving members has a unidirectional power transmission mechanism, the unidirectional power transmission mechanisms have opposite power transmission directions, and the unidirectional power transmission mechanisms are connected so as to be driven by a single motor. A reciprocating transfer device for a plate-shaped body characterized in that