JP2005089270A - Conveying roller apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveying roller apparatus by which the sticking of dust to a work is avoided as much as possible, the thermal deformation of the work is suppressed and even a relatively small work is stably conveyed. <P>SOLUTION: The conveying roller apparatus is provided with a plurality of fixed rollers 20 arranged in the conveying direction of a work W, a plurality of elevating rollers 30 vertically movable and alternately arranged with a plurality of the fixed rollers 20, a supporting member 51 for supporting a plurality of the elevating rollers 30, a vertically driving means 50 for vertically moving the supporting member 51 and a rotary driving means 40 for rotating a plurality of the fixed rollers and a plurality of the elevating rollers 30. As a result, the frequency of the contact of the work W with the rollers is reduced to decrease the sticking of dust to the work W, to suppress the thermal deformation of the work W and to prevent the degradation of the quality of the work W. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a transport roller device that rotates a plurality of rollers to transport a workpiece such as a glass plate in a heating furnace.

In general, a workpiece such as a glass plate is heated to a temperature at which bending can be performed in a heating furnace before bending. A roller hearth furnace known as a heating furnace includes a conveyance roller device therein, and when the glass plate is placed on the roller of the conveyance roller device and is carried into the roller hearth furnace, the glass plate is While being heated by the radiant heat of the upper heater provided above, it is heated by the radiant heat of the lower heater provided below, and is heated to a temperature that can be bent at the outlet of the roller hearth furnace, for example, 680 ° C.
Conventionally, as such a conveyance roller device, for example, there is one disclosed in Patent Document 1 below. As shown in FIG. 6, the transport roller device includes a device base 1, and has a large number of rollers 2 arranged on the device base 1 along the transport path of the glass plate W at equal intervals. These rollers 2 are driven to rotate by a motor 3 with an endless chain 4 spanning on both ends thereof. Thereby, the glass plate W mounted on the upper part of the roller 2 is conveyed along a conveyance path.
JP 07-1226029 A

However, in the transport roller device, since the heat-softened glass plate W is transported in contact with a large number of rollers 2, the dust adhering to the rollers 2 adheres to the glass plate W, and the glass plate W There are circumstances that degrade the quality of Moreover, since the glass etc. which are conveyed generate | occur | produce heat transfer by heat conduction from the roller 2 on the lower surface, it is more difficult to control the heat balance of the upper surface and lower surface of the conveyed glass etc. as the number of rollers 2 increases. There are circumstances to become. In addition, the fact that the heat balance of the upper and lower surfaces of the glass cannot be controlled means inadvertent thermal deformation of the conveyed glass.
Therefore, if the pitch of the rollers 2 is increased in order to minimize the number of times of contact between the glass plate W and the roller 2, a work including the small glass plate W cannot be placed on the roller 2 and is stable even if placed. There is a situation that it becomes difficult to carry in the state.

The technical problem of the present invention has been made in view of the circumstances as described above, and its purpose is to avoid the adhesion of dust to the work as much as possible, and the upper and lower surfaces of a transported object such as glass. An object of the present invention is to provide a transport roller device that makes it easy to control the heat balance and can transport a relatively small workpiece in a stable state.
The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  In order to achieve the above object, the present invention provides a plurality of fixed rollers arranged in a workpiece conveyance direction, a plurality of elevating rollers that are movable up and down and alternately arranged with the plurality of fixed rollers, and the plurality of elevating and lowering rollers. A transport roller device comprising: a support member that supports a roller; a vertical movement drive unit that moves the support member up and down; and a rotation drive unit that rotates the plurality of fixed rollers and / or the lift rollers. It is to provide.

Moreover, it is preferable that the fixed roller and / or the elevating roller is rotationally driven by a chain having a sprocket fixed to each end portion and meshing with the sprocket.
The chain is preferably driven by an inverter motor with a speed reducer.
Moreover, it is preferable that the said vertical movement drive means has a height adjustment means to adjust the height position of the said supporting member.
Moreover, it is preferable that the said height adjustment means has an adjustment nut for adjusting the height position of the said supporting member in response to advance / retreat of a screw.
Moreover, it is preferable that the said workpiece | work is a glass plate.

According to the present invention, the number of rollers on which the workpiece is placed can be reduced as much as possible by lowering the elevating roller and thinning the roller, so the number of contact between the workpiece and the roller is reduced. Thus, the adhesion of dust adhering to the roller to the work is reduced. Further, according to the present invention, the heat transfer from the roller is reduced, and the thermal deformation element of the glass is reduced. As a result, it is possible to prevent the quality of the workpiece from being lowered.
In addition, when transporting small workpieces, the lift roller is raised and returned to its original height position to reduce the pitch between the rollers, and even small workpieces can be transported in a stable state. The versatility of the apparatus can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 illustrates a schematic front view illustrating an embodiment of a conveying roller device according to the present invention, and FIG. 2 is an enlarged view of a roller portion illustrated in FIG.
1 and 2 rotate the frame 10 and a plurality of fixed and elevating rollers 20 and 30 that are alternately arranged in the conveying direction of the glass plate W that is a workpiece, and these rollers 20 and 30. The rotary drive unit 40 and the vertical drive unit 50 that moves the lifting roller 30 up and down are configured.

The frame 10 has a plurality of horizontal rails 12 installed between a plurality of support columns 11, and side plates 13 are assembled to the support columns 11 and the horizontal beam 12. A plurality of first pedestals 60 are fixed at predetermined intervals on both sides in the width direction of the frame 10.
The first pedestal 60 is formed in an L shape by a vertical plate 61 and a horizontal plate 62, and a semicircular arc-shaped concave portion 61 a is formed in the upper portion of the vertical plate 61, and the shaft 22 of the fixed roller 20 is formed in the concave portion 61 a. By fixing the bearing portion 21, the fixed roller 20 is rotatably supported by the first base 60.
Further, the horizontal plate 62 of each first pedestal 60 is located on a horizontal plane having the same height and protrudes horizontally from the side of the frame 10 toward the outside. A three-row chain rail 70 extending in the conveying direction is fixed on the horizontal plate 62, and an endless three-row chain 90 is placed on the chain rail 70. The three-row chain 90 is a chain. It runs on the rail 70.

As shown in FIG. 4, the vertical drive unit 50 is disposed on both sides in the width direction of the frame 10, a support member 51 formed in a comb shape, a hydraulic cylinder 52 that moves the support member 51 up and down, And a height adjusting mechanism 53 that adjusts the height of the support member 51.
The support member 51 is formed with a plurality of teeth 51a arranged in a line in an upward direction, and an L-shaped second pedestal 100 is fixed to the upper ends of the teeth 51a.
The second pedestal 100 is formed in an L shape composed of a vertical plate 101 and a horizontal plate 102, and a bearing portion 31 of the shaft 32 of the lifting roller 30 is placed in a semicircular arc-shaped recess 91 a formed in the upper portion of the vertical plate 101. Is fixed, and the lifting roller 30 is rotatably supported by the second pedestal 100.

  The horizontal plate 102 of each second pedestal 100 is positioned on a horizontal plane having the same height, protrudes horizontally outward from the side of the frame 10, and has three rows of chain rails 110 extending in the transport direction. A three-row chain 90 is fixed on the upper surface of the horizontal plate 102 and travels on the chain rail 110. As is apparent from the drawing, the chain rail 110 moves up and down in the same manner as the lifting roller 30, so the three-row chain 90 also moves up and down simultaneously with the lifting roller 30. Therefore, when the elevating roller 30 moves up and down, the state of the bite of the sprocket 80 and the three-row chain 90 is also well maintained.

  The second pedestal 100 and the first pedestal 60 are alternately arranged at equal intervals, and the horizontal plate 102 is positioned slightly higher than the normal horizontal plate 62. The length of the shaft 22 of the fixed roller 20 is set longer than the shaft 32 of the elevating roller 30, and sprockets 80 are fixed to both ends of the shafts 22 and 32. The fixed and elevating rollers 20 and 30 are arranged in a roller hearth furnace (not shown) which is a heating furnace, and have roller parts 23 and 33 formed of a ceramic material having excellent heat resistance into a cylindrical shape. The both ends of the shafts 22 and 32 are disposed outside the roller hearth furnace. In the figure, reference numeral 120 denotes a ceramic member that constitutes a side wall of the roller hearth furnace, and is used to partition the inside and outside of the roller hearth furnace.

The sprocket 80 is engaged with the three-row chain 90 at the lower portion thereof, and rotational force is applied by the traveling of the three-row chain 90. In this case, the sprockets 80 of the fixed roller 20 and the elevating roller 30 are preferably engaged with different sides of the inside and outside of the three-row chain 90 as shown in FIGS. 3 (a) and 3 (b). Thus, the load applied to the three-row chain 90 is distributed, and the three-row chain 90 can be smoothly run and prevented from being damaged.
In addition, since the three-row chain 90 has higher rigidity than a normal one-row chain, it is possible to reduce the chain pitch and apply a smooth rotational force to the sprocket 80.

  The hydraulic cylinder 52 is fixed to the frame 10, and its piston 52 a is fixed to the flange 15 located at the lower center of the support member 51 via a spacer 55. The periphery of the hydraulic cylinder 52 is surrounded by a frame 14, and a pair of protrusions 14 a that protrude horizontally toward the hydraulic cylinder 52 from both the left and right sides of the frame 14 in the figure are formed. The bolts 53a fixed to the left and right ends of the bolt 15a are inserted, and an adjustment nut 53b for adjusting the height position of the support member 51 is screwed into the tip of the bolt 53a.

  The support member 51 is provided with an LM guide 54 including an LM block 54a and an LM rail 54b. The LM guide 54 guides the support member 51 so as to move up and down while maintaining a horizontal state. The LM block 54 a is fixed to the support member 51, and the LM rail 54 b is fixed to the underframe 10.

  The rotation drive unit 40 includes an inverter motor 41 with a speed reducer, and a pair of sprockets 43 are fixed to a drive shaft 41a of the motor 41 at an interval. The chain 90 is engaged with these sprockets 43 and is engaged with the sprocket 42 rotatably supported at a predetermined position of the underframe 10 so that the chain 90 travels on a predetermined track. Further, the inverter motor 41 with a speed reducer is controlled by an inverter, so that the traveling speed of the chain 90, the rotation speed of the fixing and elevating rollers 20 and 30, and the conveyance speed of the glass plate W as a workpiece are easily controlled. The

  By the way, in each figure of the conveyance roller apparatus mentioned above, although the front side structural member was demonstrated, the left side structural member of the conveyance roller apparatus is also comprised similarly to the right side structural member, Therefore Description is omitted.

Since the conveying roller device is configured as described above, the fixed and elevating rollers 20 and 30 are rotated by the chain 90 that travels by the rotational force of the inverter motor 41 with a reduction gear, and the glass plate W1 is conveyed. .
Further, as shown in FIG. 5A, when the glass plate W1 is conveyed, the lifting roller 30 is lowered together with the support member 51 by the hydraulic cylinder 52, whereby the rollers are thinned out and the glass plate W1 is placed. Fewer rollers. That is, since the glass plate W only needs to be in contact with the fixed roller 20, the number of times of contact with the roller is reduced. Therefore, adhesion of dust is reduced, thermal deformation of the glass is suppressed, and deterioration of the quality of the glass plate W is prevented.

  Further, as shown in FIG. 5B, when the small work W2 is conveyed, the lift roller 30 is raised and returned to the original height position, so that the pitch between the rollers is reduced and the small work W2 is returned. But it will be transported in a stable state.

As mentioned above, although the conveyance roller apparatus of embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment description, The invention of the invention described in the claim of this invention Various changes can be made in the design without departing from the spirit.
For example, in the present embodiment, the three-row chain 90 is used as a constituent member of the rotation driving unit 40, but a single-row chain may of course be used. Moreover, the rotation drive part 40 is not limited to a motor or a chain, Whatever may be applied if it has a function to rotate a roller. Although the hydraulic cylinder 52 is used as the vertical drive unit 50 for moving the lifting roller 30 up and down, an air cylinder or a motor may be used.

As described above, according to the present invention, the number of contact between the work and the roller can be reduced by thinning the roller according to the size of the work, and dust can be prevented from adhering to the work.
Therefore, the present invention is suitable for use in conveying various glass plates in the furnace.
Such a glass plate is used for a window glass of an automobile, a building, a railway vehicle or the like. Moreover, this invention is suitable also for conveyance of not only a glass plate but a resin plate and a metal plate.

It is a schematic front view of the conveyance roller apparatus which concerns on one Example of this invention. It is an expansion perspective view of the fixing and raising / lowering roller shown in FIG. (A) And (b) is a partially notched sectional view of FIG. It is a front view of the up-and-down drive part shown in FIG. (A) And (b) is operation | movement explanatory drawing of FIG. It is a perspective view which shows the outline of the conventional conveyance roller apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Base frame 20 Fixed roller 21, 31 Bearing part 22, 32 Shaft 30 Lifting roller 40 Rotation drive part 41 Inverter motor with a reduction gear 50 Vertical drive part 51 Support member 51a Tooth part 52 Hydraulic cylinder 53 Height adjustment mechanism 53a Bolt 54 LM Guide 53b Adjusting nut 60 First base 61, 101 Vertical plate 61a, 91a Recess 62, 102 Horizontal plate 70, 110 Chain rail 80 Sprocket 90 Three rows chain 100 Second base W Glass plate

Claims (6)

A plurality of fixed rollers arranged in the workpiece transfer direction;
A plurality of elevating rollers that are vertically movable and arranged alternately with the plurality of fixed rollers;
A support member for supporting the plurality of lifting rollers;
Vertical movement drive means for moving the support member up and down;
A rotation driving means for rotating the plurality of fixed rollers and / or lifting rollers;
A conveying roller device comprising:   2. The transport roller device according to claim 1, wherein a sprocket is fixed to each end of the fixed roller and / or the elevating roller, and is driven to rotate by a chain meshing with the sprocket.   The transport roller device according to claim 1, wherein the chain is driven by an inverter motor with a speed reducer.   The transport roller apparatus according to claim 1, wherein the vertical movement driving unit includes a height adjusting unit that adjusts a height position of the support member.   The transport roller device according to claim 4, wherein the height adjusting unit includes an adjusting nut for adjusting a height position of the support member in conjunction with a forward / backward movement of a screw. The transport roller device according to claim 1, wherein the workpiece is a glass plate.

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