JP2004107064A - Board reversing device and board reversing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To operate a reversing device for preventing generation of an abnormal sound and also adapted to high speed production by reducing maintenance and a part replacing frequency by preventing metal fatigue and part wear and tear of an arm support structure and a driving force transmission mechanism in the board reversing device. <P>SOLUTION: Shock absorbers 33 and 63 for restraining the transmission of vibration and the transmission of a shock between receiving side and sending-out side arms and a motive power transmission mechanism, are interposed between an output member 43 and the respective arms 21 and 22 of the motive power transmission mechanism. A descending motion accelerator 34 increases a descending speed of the receiving side arm when the receiving side arm descends, and is interposed in series to the shock absorbers between the output member and the receiving side arm 21. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a board reversing device and a board reversing method, and more particularly, to a board reversing device and a board reversing device for reversing a plate-like material up and down by rotating a receiving side and a sending side arm in a board building material manufacturing process. It is about the method.
[0002]
[Prior art]
Background Art Board building materials such as gypsum boards obtained by coating a gypsum core material with gypsum board base paper have been widely and practically used as building interior materials.
[0003]
In the production process of gypsum board, water, calcined gypsum, adhesives, foams, various additives, etc. are kneaded by a mixing stirrer (mixer), and the base paper for the surface of the gypsum board is continuously conveyed on a conveyance device as a base sheet. You. Gypsum slurry or gypsum slurry (hereinafter simply referred to as “slurry”) kneaded by the mixing stirrer is continuously supplied to the upper surface of the lower paper from the slurry discharge pipe of the mixing agitator, and the base paper for the back surface of the gypsum board is mixed with the lower paper. At the same speed, the paper is continuously supplied as a top paper to the conveyance device, and is stacked on the bottom paper and the slurry. The base paper, the slurry and the top paper on the conveying device pass through the forming rollers of the forming machine, and have a three-layer structure (a base paper, a slurry and a top paper) having a predetermined thickness and width and a continuous band-like gypsum board formed body. And then conveyed on a forming belt of a conveying device. The slurry hardens during transport to form a gypsum core, and the hardened gypsum board compact is roughly cut by a rough cutting machine equipped with a rotary cutter or the like. The plate body roughly cut to a predetermined length is turned over by a reversing device, introduced into a dryer with the lower sheet facing the forming belt facing upward and forcedly dried for a predetermined time. The plate after forced drying is transferred to the unloader via the cooling section, and the unloader stacks the two plates with their surfaces facing each other by the reversing device, and then cuts both ends to the final dimensions. And stack as gypsum board products.
[0004]
A reversing device for reversing a plate immediately after rough cutting before introducing a dryer is disclosed in, for example, Japanese Utility Model Publication No. 1-303939 (see Patent Document 1). The opening and closing operation of this type of reversing device is schematically illustrated in FIG. The reversing device A is provided with arms C: D that are turned around the support shaft B, stand up, and face each other with the plate E interposed therebetween when standing up. The receiving arm C comes into contact with the lower surface (sheet F) of the plate body E after the rough cutting (FIG. 10A), and turns upward around the support shaft B to raise the plate body E (FIG. 10A). 10 (B)). The sending-side arm D rotates upward at the same time as the receiving-side arm C, and contacts the upper surface (upper sheet G) of the standing plate body. The arms C: D simultaneously rotate downward, and the plate body E moves onto the delivery-side arm D with the lower sheet F facing upward due to the lowering of the delivery-side arm D (FIG. 10C). ). The reversing device A repeats the operation of successively receiving and reversing the plate E by a series of interlocking arm opening / closing operations, and automatically moves the plate E toward a dryer (not shown) in the next process. Send out.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 1-303939
[0006]
[Problems to be solved by the invention]
In such a reversing device, each arm on the receiving side and the sending side always repeats up and down movements during the continuous production of gypsum board, so the arm and its supporting structure, a driving force transmitting mechanism for transmitting a driving force to each arm, and Metal fatigue is likely to occur in the support structure and various metal parts constituting the output unit of the drive device and the like, and it is necessary to perform maintenance or parts replacement relatively frequently. In addition, since various sliding metals and bearings constituting the arm supporting structure and the driving force transmission mechanism and the bearings are apt to be deformed, worn or damaged, abnormal vibration, poor rotation, and abnormal contact between parts are also caused. The frequency of occurrence of abnormal sounds due to the above-mentioned factors is also high, and it is difficult to avoid this phenomenon easily even by taking measures such as replacing the sliding metal and bearings at an early stage. Particularly, in recent gypsum board high-speed production plants designed to improve the productivity of gypsum board, a large amount of board is produced per unit time, and therefore, the operation frequency of the reversing device per unit time is high. Metal fatigue of metal and wear of parts are apt to occur, and abnormal noise is frequently generated.
[0007]
However, effective measures for preventing such metal fatigue or component wear have not yet been taken, and therefore, the board reversing process of the reversing device becomes an obstacle in improving the production speed, and the board production speed is reduced. This resulted in an inability to improve as desired.
[0008]
Also, in a gypsum board high-speed production plant, if the rotation speed of each of the receiving side and the sending side arms is increased with the intention of further increasing the board production speed, the receiving side arm receives the new plate body early. Returning to the position, there is a risk that the sending-side arm interlocked with this will drop before receiving the standing board building material from the receiving arm, and in such a case, the standing board building material will be They lose support and fall under gravity, causing damage or breakage. In order to prevent this, when the descending speed of the sending side arm is reduced, the descending speed of the receiving side arm is also reduced, so that the turning speed of each arm on the receiving side and the sending side can be increased as desired. No, and therefore the board production speed could not be improved sufficiently.
[0009]
The present invention has been made in view of such circumstances, and an object of the present invention is to prevent metal fatigue and component wear of an arm support structure and a driving force transmission mechanism, and reduce the frequency of maintenance and component replacement. Another object of the present invention is to provide a board reversing device capable of preventing occurrence of abnormal sound.
[0010]
Another object of the present invention is to provide a board reversing apparatus and a board reversing method that enable board reversal adapted to high-speed production of board building materials.
[0011]
Means and Action for Solving the Problems
The board reversing device according to the present invention supports a plate body of a board building material, and a receiving arm that rotates around a horizontal pivot axis, and rotates around a horizontal pivot axis in conjunction with the receiving arm. A sending-side arm for receiving from the receiving-side arm with the plate body turned upside down, a driving force transmitting mechanism including an output member for outputting power for rotating the receiving-side and sending-side arms, and a pivotal connection to each arm and the output member. Power transmitting means for transmitting the power of the output member to each of the arms.
[0012]
In the board reversing device of the present invention, a buffer device for reducing vibration and impact acting on each arm, or a descent motion accelerating device for increasing the descent speed of the receiving arm when the receiving arm is lowered, is used alone or in series. A buffer / acceleration device which is interposed in the power transmission means or which reduces vibration and impact acting on the receiving arm and increases the descending speed of the receiving arm when the receiving arm descends is provided in the power transmitting means. Be mounted.
[0013]
According to the above configuration of the present invention, the shock absorber suppresses the transmission of vibrations and the transmission of shocks between the receiving-side and delivery-side arms and the driving force transmission mechanism, thereby reducing the vibration of the arm support structure and the power transmission path. Alternatively, the impact is reduced to prevent metal fatigue and component wear of each part constituting the arm support structure and the power transmission path. For this reason, deformation, wear, breakage, and the like are unlikely to occur in the various metals and bearings constituting the arm support structure and the power transmission path, and the frequency of maintenance and component replacement is reduced. In addition, since the metal fatigue and parts wear of various metals and bearings constituting the arm support structure and the power transmission path are unlikely to occur, abnormal noise and the like can be prevented, so that the rotation speed of the arm and the operation frequency of the reversing device can be prevented. And the production speed of the board building material can be increased.
[0014]
According to the above configuration of the present invention, the descent motion acceleration device interposed between the output member of the driving force transmission mechanism and the receiving arm increases the descent speed of the receiving arm when the receiving arm is lowered. Therefore, the receiving arm can be returned to the new material receiving position at an early stage. Thus, it is possible to increase only the descending speed of the receiving side arm without increasing the rotation speed of the receiving side and the sending side arm. Therefore, the problem caused by increasing the arm rotation speed is that the sending side arm descends before the sending side arm receives the standing board building material, and the board building material loses the receiving side of the sending side arm and loses gravity. The operation frequency of the reversing device can be increased and the production speed of the board building material can be increased while avoiding the problem of falling down.
[0015]
Furthermore, according to the present invention, by adopting both the buffer device and the descent motion acceleration device, or the board reversing device provided with the buffer / acceleration device, the problem of falling down of the board building material can be avoided. The arm rotation speed is increased, thereby increasing the production speed of the board building material, and the high-speed production line can be operated even more efficiently.
[0016]
The board reversing method according to the present invention is a board reversing method of reversing a plate of a board building material in a board building material manufacturing line and sending the board to the next step.More specifically, the board reversing method is arranged on a board building material manufacturing line. A board inversion method in which a board body of a board building material is turned upside down by opening and closing the receiving side arm and the sending side arm, and the board body is moved onto the receiving side arm and the receiving side arm is turned upward. Moving the plate body to the upright position, sandwiching the plate body between the sending-side arm and the receiving-side arm rotated simultaneously with the receiving-side arm, and rotating the receiving-side arm and the sending-side arm downward, This is a board reversing method including the steps of lowering a plate to a horizontal sending position by a sending-side arm and sending the plate to a next process by a sending-side transport device.
[0017]
According to the board reversing method of the present invention, (1) a descending motion accelerating device is interposed in a power transmitting means for transmitting power for rotating the receiving arm, and the accelerating device is operated when the receiving arm is lowered to receive the arm. The descending speed of the side arm is increased, the receiving side arm is returned to the new plate receiving position at an early stage, and (2) the shock absorber and the descending motion accelerating device are transmitted to the power transmitting means for transmitting the power for rotating the receiving side arm. The vibration and shock of the receiving arm are damped by the vibration damping effect and the shock damping effect of the shock absorber, and the shock absorber / accelerator is activated when the receiving arm is lowered to lower the receiving arm. The speed is increased, the receiving side arm is returned to the new plate receiving position early, or (3) a buffering / acceleration device is interposed in a power transmitting means for transmitting power for rotating the receiving side arm, Receiving side Vibration and shock are damped by the vibration damping effect and the shock damping effect of the acceleration / acceleration device, and the damping / acceleration device is activated when the receiving arm descends to increase the descending speed of the receiving arm, and The arm is returned to the new plate receiving position early. Preferably, a shock absorber is interposed in each of the power transmission means for transmitting the power for rotating each arm on the receiving and sending sides, and the vibration and shock of each arm are reduced by the vibration damping effect and the shock damping effect of the shock absorber. Dampen.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
According to a preferred embodiment of the present invention, a plurality of receiving arms extend in a direction intersecting with the approach direction of the board building material, and the acceleration device or the buffering / acceleration device is at least located at the upstream side in the approach direction of the board building material. It is interposed between one receiving arm and the output member. That is, in the reversing device of the type in which the receiving arm is oriented in a direction orthogonal to the approach direction of the board building material, the receiving arm located on the upstream side of the board approach direction descends early, so that the new material is received early. be able to. Therefore, it is desirable that the acceleration device be provided preferentially on the receiving arm on the upstream side in the board entry direction.
[0019]
According to a further preferred embodiment of the present invention, the shock-absorbing device comprises a fluid shock-absorbing buffer filled with a fluid, and the accelerating device or the shock-absorbing device includes a telescopic member connected to an output member and a receiving arm. It consists of a possible hydraulically operated cylinder device. Preferably, the output member includes a swing lever that swings about a horizontal axis parallel to the pivot axis, the cylinder body of the cylinder device is pivotally attached to a tip of the swing lever, and the movable rod of the cylinder device is Connected to the shock absorber.
[0020]
In a preferred embodiment of the present invention, the supply / discharge port of the cylinder device is connected to a supply source and a discharge unit of the working fluid via a switching control valve. The switching control valve controls the supply and discharge of the working fluid such that the movable rod of the cylinder device is drawn into the cylinder device when the receiving-side arm is lowered.
[0021]
As the above-described shock absorber, various springs, various rubbers, elastomers, elastic members or elastic members such as synthetic resins, fluid shock absorbers such as hydraulic or pneumatic cylinders and the like are preferably used. In addition to those having no buffering action such as an electric actuator and the like, those having a structure having both an accelerating action and a damping action such as a fluid pressure (hydraulic or pneumatic) type cylinder apparatus can be preferably used. Further, as the buffering / acceleration device, a device having a structure in which the elastic body or the like is connected to an electric jack or an electric actuator, a fluid pressure operated cylinder device, or the like can be preferably used.
[0022]
【Example】
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a process explanatory view schematically showing a gypsum board manufacturing process.
[0023]
At the starting end of the gypsum board manufacturing apparatus, the base paper for the surface of the gypsum board is supplied to the transport line 3 as the base paper 1 and travels on the transport line 3 in the transport direction (the direction of the arrow α). A roll coater 5 is disposed in the transport path of the underpaper 1, and a slurry discharge pipe of a re-stirrer (sub-mixing stirrer) 6 passes through a slurry S ′ having a relatively high specific gravity upstream of the roll coater 5. It is supplied on paper 1 and forms a thin layer (shown by broken lines) of high specific gravity slurry S ′ on the upper surface of base paper 1.
[0024]
The left and right scores are engraved on the lower sheet 1 by a scoring device (not shown), and the side edges of the lower sheet 1 are folded back by the left and right guide members (not shown), and are conveyed on the conveying line 3 in the conveying direction. While being moved to the shape of the edge of the gypsum board. A mixing stirrer 4 composed of a pin mixer is disposed above the transport line 3, and powder materials such as calcined gypsum, an adhesive, an additive, an admixture, foams, and a liquid material (kneading water) are mixed with the mixing stirrer 4. Supplied to The mixing / stirring machine 4 rotationally drives an internal rotor (not shown) by rotation of a drive shaft, stirs and mixes powder, foam, and liquid raw materials, and discharges the slurry S to the central portion of the backing paper 1. If desired, a part of the slurry may be re-mixed by an edge mixer (not shown) to adjust the specific gravity, and then discharged to the edge of the base paper 1.
[0025]
The base paper for the back side of the gypsum board is supplied to the transport line 3 as the top paper 2. The upper paper 2 is continuously supplied to the forming roller of the forming machine 7 along a predetermined path by the guide of the turning roller, and is stacked on the slurry S. A roll coater 8 is disposed in the supply path of the top paper 2, and a re-stirrer 9 supplies the slurry S ″ having a relatively high specific gravity on the top paper 2 upstream of the roll coater 8.
[0026]
The lower paper 1, the slurry S and the upper paper 2 are formed into a three-layer continuous strip T by the forming machine 7, and are continuously formed on the forming belt 10 constituting the transport line 3 toward the rough cutting machine 11. Conveyed. The slurry S hardens during transportation, forms a gypsum core, and the portion of the continuous laminate T that has reached the rough cutting machine 11 is roughly cut by the rough cutting machine 11 into plate bodies W of a predetermined length.
[0027]
The rough cutting machine 11 includes a rotary cutter 12, and an acceleration roller conveyor 13 is provided downstream of the rotor cutter 12. The acceleration roller conveyor 13 accelerates a portion of the laminate T located on the downstream side of the rough cutting machine 11 so that the plate W is forcibly separated from the laminate T when the laminate T is cut by the rotary cutter 12. Function.
[0028]
The plate W is conveyed onto the receiving (entering) arm 21 of the reversing device 20 by the acceleration roller conveyor 13. On the receiving arm 21, the upper paper 2 is located on the upper surface of the plate W, and the lower paper 1 is located on the lower surface of the plate W. The plate W moves onto the delivery-side arm 22 by the operation of the reversing device 20. On the delivery arm 22, the lower sheet 1 is located on the upper surface of the plate W, and the upper sheet 2 is located on the lower surface of the plate W.
[0029]
The plate body W on the delivery-side (transport-side) arm 22 is introduced into the dryer 15 with the base paper 1 serving as the surface paper of the gypsum board facing upward, and is forcibly dried in a high-temperature machine atmosphere, and thereafter, An unloader reversing device (not shown) having a structure similar to that of the reversing device 20 is "blinded" every two sheets, and the ends are finally cut to a predetermined product size and stacked.
[0030]
FIG. 2 is a plan view schematically showing the entire configuration of the reversing device 20.
As shown in FIG. 2, a large number of receiving arms 21 are arranged at predetermined intervals in the direction of conveyance α. The receiving roller conveyor 23 supported by the machine casing 29 is arranged between the receiving arms 21, and the receiving arm 21 and the receiving roller conveyor 23 are arranged in parallel and alternately. The same number of sending arms 22 as the receiving arms 21 are arranged in pairs with each receiving arm 21. The transport belt 24 is arranged between the delivery-side arms 22, and the transport belt 24 and the delivery-side arms 22 are arranged in parallel and alternately with each other. The metal arms 21 and 22 on the receiving side and the sending side extend in a direction orthogonal to the transport direction α.
[0031]
The receiving-side roller conveyor 23 moves the plate body W in the conveying direction α at a speed synchronized with the acceleration roller conveyor 13 by the operation of the conveying driving device (not shown), and the conveying belt 24 is a starting end for driving the conveying belt. The plate W is moved in the transport direction β orthogonal to the transport direction α by the rotation of the roller 26 (only one portion is shown) and the end roller (not shown).
[0032]
An activation sensor 25 provided with an optical detector capable of detecting the plate W is disposed at a position where the movement of the plate W from the acceleration roller conveyor 13 onto the receiving roller conveyor 23 can be detected. In this example, two plate members W are supplied onto the roller conveyor 23 before the reversal start. By the pivotal movement of the arms 21 and 22 about the pivot axes X1 and X2, the plate body W is turned over and moves onto the delivery-side arm 22 and is transported by the transport belt 24 in the delivery direction β. (FIG. 1).
[0033]
FIGS. 3A and 4 are a partial front view and a partial side view of the reversing device 20 showing a driving mechanism of the receiving and sending arms 21, and FIG. 3B is a power transmission connected to the arm 21. It is an enlarged front view of the means 30.
[0034]
A bearing is attached to the base end of the arm 21, and a support shaft 26 is fixed to a machine frame 29 (FIG. 2) at the center of the reversing device. The arm 21 is rotatably supported about a horizontal axis as shown in FIG. The arm 21 is stationary at a lowermost position shown by a solid line while being slightly inclined outward, and the horizontal transport plane H of the receiving roller conveyor 23 is located slightly above the arm 21. The power transmission means 30 is arranged in a lower area of the arm 21, and the upper connecting rod 31 of the power transmission means 30 is pivotally connected to the arm 21 by the joint connection part 32. The joint connecting portion 32 has a horizontal support shaft, and the support shaft is rotatably supported by a bearing (not shown) attached to the arm 21. The power transmission means 30 has a structure in which a shock absorber 33 filled with a shock absorbing fluid and a fluid pressure operated cylinder device 34 are connected in series, and a movable rod 39 of the cylinder device 34 is connected to the shock absorber 33. Is done. A bracket 35 having an articulated portion 36 is fixed to a lower end of the cylinder device 34.
[0035]
A rotation shaft 40 extends along the machine casing 29 (FIG. 2) parallel to the pivot axis X1. The cylindrical base 42 of the swing lever 43 constituting the output member of the driving force transmission mechanism is integrally mounted on the rotating shaft 40. The upper and lower rocking levers 43 oriented substantially at right angles extend integrally and radially outward from the cylindrical base 42. The upper swing lever 43 is arranged corresponding to each of the arms 21 and 22, and the lower swing lever 43 is arranged at a position adjacent to the rotating plate 55 of the reversing device drive source. The distal end of the upper swing lever 43 is pivotally attached to the joint connecting portion 36 of the bracket 35. The joint connecting portion 36 has a horizontal support shaft similarly to the joint connection portion 32, and the support shaft is rotatably supported by a bearing (not shown) attached to a distal end portion of the upper swing lever 43.
[0036]
The distal end portion of the lower swing lever 43 is connected to the rod portion 52 of the crank arm device 50 by the joint joint 51. The joint joint 51 includes a bearing attached to the distal end of the lower swing lever 43 and a support shaft attached to the distal end of the rod 52. The support shaft of the rod portion 52 is rotatably supported by the bearing of the lower swing lever 43. A bracket 53 of the crank arm device 50 is pivotally attached to a side surface of the rotating plate 55.
[0037]
The rotating plate 55 is connected to a reversing device drive source (not shown) such as an electric motor via a speed reduction mechanism (not shown). The rotating plate 55 rotates in the direction of the arrow γ by the power of the driving source when the arm 21 moves up and down, and the crank arm device 50 reciprocates by rotating the rotating plate 55. Note that the crank arm device 50 includes a length adjustment mechanism that allows the entire length of the crank arm device 50 to be adjusted by extending or retracting the rod portion 52.
[0038]
FIG. 5A is a partial front view of the reversing device 20 showing a driving mechanism of the delivery-side arm 22, and FIG. 5B is an enlarged front view of the power transmission means 60 connected to the arm 22.
[0039]
Like the arm 21, the arm 22 is rotatably supported by a support shaft 27 via a bearing attached to a base end thereof. The arm 22 is also at rest at the lowest position shown by the solid line while slightly inclined outward, and the horizontal transport plane H of the transport belt 24 is located slightly above the arm 22. The power transmission means 60 is arranged in the lower region of the arm 22, and the upper connecting rod 61 of the power transmission means 60 is pivotally connected to the arm 22 by the articulated joint 62. The power transmission means 60 includes a shock absorbing device 63 in which a shock absorbing fluid is sealed, and a bracket 65 including an articulated portion 66 is integrally connected to the shock absorbing device 63. The structure of the joint connectors 62 and 66 is substantially the same as that of the joint connectors 32 and 36.
[0040]
In the present example, the shock absorbers 33 and 63 are formed of hydraulic cylinder shock absorbers in which hydraulic oil is sealed as a shock absorbing fluid, and insulate shock transmission or vibration transmission between the arms 21 and 22 and the swing lever 43.
[0041]
Similarly to the receiving arm 21, the rotation shaft 40 extends along the machine frame 29 (FIG. 2) parallel to the pivot axis X2, and the cylindrical base 42 of the swing lever 43 is fixed on the rotation shaft 40. . Similarly to the arm 21, the distal end of the upper swing lever 43 is pivotally connected to the joint connecting portion 66 of the bracket 65, and the distal end of the lower swing lever 43 is connected to the rod 52 of the crank arm device 50 by the joint joint 51. The bracket 53 of the crank arm device 50 is connected, and is pivotally attached to the side surface of the rotating plate 55.
[0042]
As shown in FIGS. 3 and 5, the cylinder body of the cylinder device 34 includes supply / discharge ports 37 and 38 for the working fluid, and is a two-position control type via the supply / discharge ports 37 and 38 and the fluid conduits 71 and 72. Connected to solenoid valve 70. The solenoid valve 70 opens the conduit 71 to the atmosphere and communicates the conduit 72 with the main pipe 75 of the working fluid. The first position (rod extension position) connects the conduit 71 with the main pipe 75 of the working fluid. Switching control is performed to a second position (rod retraction position) in which 72 is opened to the atmosphere. The electromagnetic solenoid 73 of the solenoid valve 70 is connected to the control unit 80 via a control signal line 77. In this example, the cylinder device 34 is a pneumatically operated cylinder device, and compressed air is used as the working fluid of the cylinder device 34.
[0043]
The start sensor 25 is connected to the control unit 80 via a control signal line, and the stop sensor 28 for detecting the lowered position of the arms 21 and 22 is connected to the control unit 80 via a control signal line. The control unit 80 includes a drive control unit that controls the operations of the acceleration roller conveyor 13, the receiving roller conveyor 23, the conveyor belt 24, the electromagnetic valve 70, and the drive source of the reversing device, and a determination unit that determines whether the reversing device 20 is started or stopped. And timing means for controlling the start and stop timing of each unit.
[0044]
FIGS. 6, 7 and 8 are a plan view and a schematic front view of the reversing device 20 showing an operation mode of the reversing device 20. FIG.
The control and operation of the cylinder device 34 will be described with reference to FIGS.
[0045]
The control unit 80 keeps the control signal line 77 in a non-energized state and demagnetizes the electromagnetic solenoid 73 at all times. The solenoid valve 70 is held at the first position (rod extension position), and the working fluid of the main pipe 75 is supplied to the supply / discharge port 38 via the pipe 72. The cylinder device 34 is held in a state where the movable rod 39 is extended to the maximum extended position.
[0046]
When the plate W starts to move onto the receiving arm 21, the activation sensor 25 detects the plate W and inputs a board detection signal to the control unit 80. When the control unit 80 determines the start of movement of the plate W on the receiving arm 21 by the board detection signal, the control unit 80 activates the activation timer, and activates the reversing device drive source when the activation timer expires. At this point, as shown in FIGS. 6A and 6B, the two plate members W are stationary on the receiving arm 21.
[0047]
By driving the drive source, the rotary plate 55 rotates, and the swing lever 43 rotates to push up the power transmission means 30, 60. The arms 21 and 22 rotate upward due to the rise of the power transmission means 30 and 60, and the plate W on the arm 21 is gradually inclined. As shown in FIG. 6C, the arms 21 and 22 are closed and stopped with the plate W sandwiched between the arms 21 and 22, and the plate W is completely erected. At this time, the arms 21 and 22 are slightly inclined toward the delivery side at the upper stop position, and the center of gravity of the plate W moves toward the delivery side arm 22. At the same time, the stop sensor 28 detects the upper stop position of the receiving arm 21 and inputs a stop signal to the control unit 80. The stop sensor 28 is attached so as to detect the rotation of the rotating plate 55 or the rotation of the swing lever 43.
[0048]
Due to the continuation of the rotational movement of the rotary plate 55, the swing lever 41 starts swinging in the opposite direction, and the power transmission means 30, 60 descends. The arms 21 and 22 rotate downward and start to open due to the lowering of the power transmission means 30 and 60, and as shown in FIG. 7B, incline the arms 21 and 22 so as to separate from each other. The plate W that has moved to the center of gravity on the delivery-side arm 22 starts to tilt toward the delivery side while being supported by the arm 22.
[0049]
The control unit 80 determines the stop of the receiving arm 21 based on the stop signal, activates the fluid cylinder device operation timer, and switches the solenoid valve 70 to the second position (movable rod retracted position) when the timer expires. A working fluid is supplied to the pipe 71, and the pipe 72 is opened to the atmosphere. As a result, the cylinder device 34 starts the retraction of the rod 39, and the lowering of the receiving arm 21 is accelerated by the retraction of the rod 39. That is, the descending speed of the receiving arm 21 descends at a speed obtained by adding the rod retracting speed to the arm descending speed regulated by the rotational speed of the rotary plate 55. For this reason, as shown in FIG. 7 (C), the receiving side arm 21 descends to the horizontal position prior to the sending side arm 22, and the reversing device 20 is brought into a state in which the new material (plate W) can be received. Return early. As shown in FIG. 7D, the sending-side arm 22 descends to the horizontal position slightly later than the receiving-side arm 21, and the plate W on the arm 22 is placed on the transport belt 24.
[0050]
Completion of one cycle (one cycle of the operation of the receiving side arm and the sending side arm) of such a reversing device is performed by, for example, detecting the lowest position of the arms 21 and 22 and inputting the position signal to the control unit. Then, the control unit 80 stops the reversing device drive source so as to stop the rotation of the arms 21 and 22 at the same time when the arms 21 and 22 reach the lowest position. The arms 21 and 22 stop slightly below the transport plane as described above. The control unit 80 also switches the solenoid valve 70 to the first position (rod extension position) according to the position signal, supplies the working fluid to the pipe 72, and opens the pipe 71 to the atmosphere. The cylinder device 34 returns to the initial position where the rod 39 is extended.
[0051]
As shown in FIG. 7A, when the two plate members W are completely moved on the transport belt 24 in a state where the plate members are turned upside down, as shown in FIG. 8A and FIG. W is transported in the transport direction β by the transport belt 24 and is introduced into the dryer 15 (FIG. 1). At this point, the two new materials (plates) W have been moved onto the receiving arm 21, and the reversing device 20 can quickly start the reversing process.
[0052]
As described above, the reversing device 20 of the present embodiment has the arms 21 and 22 that open and close by the swing of the swing lever 43, and forms a power transmission path between the arms 21 and 22 and the swing lever 43. The power transmission means 30 and 60 are provided with shock absorbers 33 and 63 in which fluid is sealed, and the shock absorbers 33 and 63 transmit shock or vibration between the arms 21 and 22 and the swing lever 43. To prevent. As a result of a test operation of the reversing device 20 provided with such power transmission means 30, 60, it was found that the life (replacement time) of the bearing could be extended to one year. This is extremely advantageous in comparison with the conventional bearing life (replacement time) of two months. Further, while the conventional connecting rod interposed between the arms 21 and 22 and the swing lever 43 breaks at 10.3 million operation repetitions, the power transmission means 30 and 60 are operable at 2600 operation repetitions. It operated well over 10,000 times, and no partial breakage or damage of the power transmission means 30, 60 was observed.
[0053]
In addition, the ascending speed and the descending speed of the arms 21 and 22 can be increased by the shock absorbing effect and the vibration insulating effect of the power transmission means 30 and 60. Further, as described above, the reversing device 20 is a fluid pressure type. With the adoption of the cylinder device 34, the receiving arm 21 precedes the descent and the new plate W is quickly returned to a state in which it can be received. Board production speed can be increased. According to the test of the present inventor, in the gypsum board manufacturing apparatus using the power transmission means 30, 60, the production speed was increased about 1.3 times as compared with the case using the conventional reversing apparatus.
[0054]
In the above embodiment, the power transmission means 30 and 60 are arranged on all the arms 21 and 22. However, as shown in FIG. 9, a connecting rod 90 having a fluid pressure operated cylinder device 34 and a turnbuckle 91, Alternatively, a connecting rod 90 ′ having only the turnbuckle 91 may be used for some of the arms 21 and 22, and the above-described power transmission means 30 and 60 may be used in combination with the connecting rods 90 and 90 ′.
[0055]
Further, in the above embodiment, the hydraulic shock absorber 33 and the pneumatically actuated cylinder device 34 are used. However, as the shock absorber 33 and the cylinder device 34, a type using an arbitrary working fluid, for example, a pneumatic shock absorber or A hydraulically operated cylinder device may be used. Further, as a shock absorber, an elastic body or an elastic member such as various springs, various rubbers, elastomers, and synthetic resins is used, and instead of the pneumatically operated cylinder device 34, an electric jack is used. Alternatively, a structure having no buffering action such as an electric actuator may be used.
[0056]
Furthermore, with respect to the above embodiment, it has been described that the rotating plate and the driving source for operating the receiving side and the sending side arm are provided on the receiving side and the sending side, respectively, but the receiving side and the sending side arms are shared. It may be operated by a rotating plate and a drive source.
[0057]
Further, the reversing device of the above embodiment is of a type that is disposed between the rough cutting device and the dryer and the transport direction α and the delivery direction β are set in directions orthogonal to each other. The present invention is not limited thereto, and the present invention can be similarly applied to a reversing device of a type in which the conveying direction and the sending direction are set to the same direction, and a reversing device of an unloader.
[0058]
【The invention's effect】
As described above, according to the board reversing device of the present invention, metal fatigue and component wear of the arm support structure and the driving force transmission mechanism can be prevented by interposing the buffering device or the buffering / acceleration device in the power transmission means. In addition, the frequency of maintenance and parts replacement can be reduced, and the occurrence of abnormal noise can be prevented.
[0059]
Further, according to the board reversing device and the board reversing method of the present invention, the descending motion of the receiving side arm is accelerated by interposing the descending motion accelerating device or the buffering / acceleration device in the power transmission means, and the operation of the reversing mechanism is performed. The frequency can be increased, thereby enabling board reversal adapted to high-speed production of board building materials.
[Brief description of the drawings]
FIG. 1 is a process explanatory view schematically showing a gypsum board manufacturing process.
FIG. 2 is a plan view showing the entire configuration of the reversing device.
FIG. 3 is a partial front view of a reversing device and a magnified front view of a power transmission unit showing a driving mechanism of a receiving arm.
FIG. 4 is a partial side view of the reversing device.
FIG. 5 is a partial front view of a reversing device and an enlarged front view of a power transmission unit, showing a driving mechanism of a delivery-side arm.
6A and 6B are a plan view and a schematic front view showing an operation mode of the reversing device, and show an operation mode at the time of receiving the plate.
FIGS. 7A and 7B are a plan view and a schematic front view showing an operation mode of the reversing device, showing an operation mode at the time of plate reversal.
8A and 8B are a plan view and a schematic front view showing an operation mode of the reversing device, and show an operation mode at the time of feeding the plate body.
FIG. 9 is a front view illustrating the structure of a connecting rod that can be used together with the power transmission means according to the present invention.
FIG. 10 is a schematic front view showing a configuration of a conventional reversing device.
[Explanation of symbols]
20 Reversing device
21 Receiving arm
22 Delivery side arm
23 Receiving roller conveyor
24 Conveyor belt
30, 60 power transmission means
33, 63 shock absorber
34 Fluid pressure operated cylinder device
40 rotation axis
43 Swing lever
50 Crank arm device
W plate

Claims (5)

A receiving arm that supports the board of the board building material and rotates about a horizontal pivot axis,
A delivery side arm that rotates about a horizontal pivot axis in conjunction with the reception side arm, and receives from the reception side arm in a state where the plate is turned upside down,
A driving force transmission mechanism including an output member that outputs power for rotating the receiving side and the sending side arm,
A board reversing device comprising: a power transmission unit that has both ends that can be pivotally attached to the arms and the output member, and that transmits power of the driving force transmission mechanism to the arms.
A board reversing device, wherein a damping device for reducing vibration and impact acting on the arm is interposed in the power transmission means. A receiving arm that supports the board of the board building material and rotates about a horizontal pivot axis,
A delivery side arm that rotates about a horizontal pivot axis in conjunction with the reception side arm, and receives from the reception side arm in a state where the plate is turned upside down,
A driving force transmission mechanism including an output member that outputs power for rotating the receiving side and the sending side arm,
A board reversing device comprising: a power transmission unit that has both ends that can be pivotally attached to the arms and the output member, and that transmits power of the driving force transmission mechanism to the arms.
A board reversing device, wherein a lowering motion accelerating device for increasing the descending speed of the receiving arm when the receiving arm is lowered is interposed in the power transmission means. A receiving arm that supports the board of the board building material and rotates about a horizontal pivot axis,
A delivery side arm that rotates about a horizontal pivot axis in conjunction with the reception side arm, and receives from the reception side arm in a state where the plate is turned upside down,
A driving force transmission mechanism including an output member that outputs power for rotating the receiving side and the sending side arm,
A board reversing device comprising: a power transmission unit that has both ends that can be pivotally attached to the arms and the output member, and that transmits power of the driving force transmission mechanism to the arms.
A board reversal, wherein a buffer / accelerator for reducing the vibration and shock acting on the receiving side arm and increasing the descending speed of the receiving side arm when the receiving side arm is lowered is interposed in the power transmission means. apparatus. 2. The board reversing device according to claim 1, wherein a descent motion acceleration device for increasing the descent speed of the receiving arm when the receiving arm is lowered is interposed in the power transmission means in series with the shock absorber. . A board reversing method of reversing the plate of the board building material in a board building material production line, and sending the board to the next step,
The board reversing device according to any one of claims 2 to 4, which is arranged on the production line, operates the accelerator when the receiving arm descends to increase the descending speed of the receiving arm, A board reversing method, wherein the receiving side arm is returned to a new plate receiving position at an early stage.

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