JPH10258408A - Cement board manufacturing equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To realize a simple clamp mechanism that does not require maintenance and to increase the productivity of cement-based boards. A clamping mechanism provided in a suction box (41) includes a block (81) that comes into contact with and separates from both ends of a filter cloth (11), and a block (8).
1 is moved by its own weight, and the arm 82 or the block 81 is engaged with the cam for clamping and the cam for releasing, so that the block 81 gradually moves to the suction surface portion 42 with the filter cloth 11 interposed therebetween. Approach and separate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a cement board, and more particularly to an apparatus for manufacturing a cement board capable of continuously dewatering and flattening a slurry-like cement material in layers. .

[0002]

2. Description of the Related Art An apparatus of this type for producing a cement board is disclosed, for example, in JP-B-56-33129. This device includes a filter cloth (filter cloth) traveling along a predetermined traveling path including a horizontal traveling area, material supply means for supplying a slurry-type cement-based material onto the filter cloth, and a suction plate comprising a perforated plate. A plurality of suction boxes having a surface portion and a back surface portion on which a negative pressure forming hole is formed, and a conveyor that moves along the filter cloth so that the suction surface portions of these suction boxes sequentially face the lower surface of the filter cloth in the horizontal traveling area. Have. Further, the manufacturing apparatus includes a plurality of clamp units that clamp the filter cloth on the suction surface of the suction box so as to move the filter cloth and the suction box integrally in the horizontal travel area, and a plurality of clamp units below the filter cloth in the horizontal travel area. A trough which has a suction groove facing the negative pressure forming hole of the suction box and forms a negative pressure in the suction box while slidingly contacting the back surface of a predetermined number of suction boxes, and a negative pressure in the suction box. A pressure roll for dehydrating and flattening the cement-based material layer dehydrated on the filter cloth.

As shown in FIG. 11, the clamping mechanism includes a pressing block 2 provided at each end of a suction box 1.
A swing arm 3 swingably mounted on the suction box 1 so as to move the pressing block 2 to the clamp position and the clamp release position, and a moving roller 4 a provided on a side of the suction box 1.
Mechanism 4 for movably holding the swing arm 3 via a slide lever 4b, and a tension spring 5 locked at one end to the free end of the swing arm 3 and locked at the other end to the moving roller 4a.
A stopper 6 for regulating the swing of one side of the swing arm 3 at a predetermined position, and cam surfaces 7a and 7 with which the moving roller 4a engages.
The guide rail 7 includes a guide rail 7 and the like. The guide rail 7 moves the moving roller 4a to apply the urging force of the tension spring 5 to one of the one side and the other side in the swing direction of the swing arm 3. Side, that is, reversed, and the clamping and unclamping operation by the pressing block 2 is performed.

[0004] In this apparatus, a cement-based board can be continuously manufactured by continuously dewatering and flattening a slurry-type cement-based material containing reinforcing fibers while forming it into a layer on a conveying means. Further, by transporting the suction box 1 integrally with the filter cloth 8 facing the upper surface thereof, there is an advantage that wrinkling and twisting of the filter cloth 8 can be suppressed.

[0005]

However, in the above-mentioned conventional cement-based board manufacturing apparatus, the clamp mechanism provided at each end of a large number of suction boxes has a plurality of moving rollers by a tension spring 5 using a large number of components. Because it was complicated to reverse the biasing direction of 4a,
There is a problem that not only the maintenance is not easy but also the cost of the apparatus is increased.

In addition, although the cement-based material and the cleaning liquid containing the same are scattered and adhere to the slide mechanism 4, the slide mechanism 4 is difficult to clean, and the slide mechanism 4 is likely to malfunction. Frequent maintenance was required. For this reason, the operation rate of the device is reduced, and the productivity of the cement board cannot be increased.

Accordingly, an object of the present invention is to realize a simple clamping mechanism having a configuration that does not require maintenance, and to increase the productivity of cement-based boards.

[0008]

In order to achieve the above object, the invention according to claim 1 is made of a filtering sheet material having a predetermined width and travels along a predetermined traveling path including a substantially horizontal traveling area. A filter cloth, a material supply means for supplying a slurry-like fluid mixed material containing cement and a reinforcing fiber material, and supplying the fluid mixed material onto the filter cloth from an upstream side of a substantially horizontal traveling region of the filter cloth. A material layer forming means for forming a material layer having a predetermined thickness in the width direction of the filter cloth, a suction surface portion having a plurality of suction holes, and a negative pressure forming communicating with each of the suction holes. A plurality of suction boxes having a back surface with holes formed therein, and a plurality of suction boxes disposed in the vicinity of the filter cloth, and the suction surfaces of the plurality of suction boxes facing a lower surface of the filter cloth in the substantially horizontal traveling area, Multiple suction boxes on top and bottom Moving means for moving along an endless transport path including a substantially horizontal travel section, and forming a negative pressure through the negative pressure forming holes in a plurality of suction boxes facing the filter cloth in the substantially horizontal travel area; Suction suction and dewatering means for sucking and dewatering moisture from the material layer on the filter cloth in the substantially horizontal travel area through the suction surface portion, and provided at both ends of each suction box, wherein the suction box is provided on the upper substantially horizontal travel section. A plurality of pairs of clamp mechanisms that press and clamp both ends in the width direction of the filter cloth against the suction surface when conveyed, in a cement-based board manufacturing apparatus comprising: A pressing block movable in a predetermined direction so as to abut and separate from both ends in the direction, and a suction block connected to the pressing block and moving the pressing block in the predetermined direction by its own weight. A clamp arm supported at both ends of the box so as to be swingable. The clamp arm engages with the clamp arm or the pressing block near the upstream end of the upper substantially horizontal traveling section, and by its own weight near the upstream end. A clamp operation cam for regulating the movement of the pressing block urged to approach the suction surface portion, and gradually bringing the pressing block closer to the suction surface portion of the suction box with the movement of the suction box; When the suction box is engaged with the clamp arm or the pressing block near the downstream end of the upper substantially horizontal traveling section and reaches near the downstream end of the endless traveling path, the pressing is performed against the weight of the pressing block. And a clamp release cam for separating the block from the suction surface of the suction box. Accordingly, it is not necessary to provide a complicated mechanism for moving the pressing block to the clamp side and the clamp release side in each suction box, and the cleaning of the clamp operation cam and the clamp release cam can be easily performed even during the operation, and the malfunction does not easily occur. Become.

The suction box may be engaged with the clamp arm or the pressing block in a reversing section in which the lower traveling section shifts from the lower traveling section to the upper traveling section. It is preferable to provide a regulating plate that regulates the movement of the pressing block urged to approach the suction surface by its own weight in the inside. By doing so, the clamp operation cam can be made a simpler cam.

The clamp arm may include an end portion for supporting the pressing block, an intermediate portion supported on both ends of the suction box so as to be swingable, respectively.
Further, the cam follower at the other end may be provided with a rotatable cam follower, and the cam follower at the other end may be engaged with the clamp operation cam and the clamp release cam. In this case, the clamp operation can be made smooth and stable by the cam follower. The cam follower is more preferably formed from a resin material having self-lubricating properties.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 1
FIG. 0 is a view showing one embodiment of a cement-based board manufacturing apparatus according to the present invention. First, the configuration will be described.

As shown in FIGS. 1 and 2, the manufacturing apparatus includes a loop-belt-shaped filter cloth 11 conveyed so as to circulate along a predetermined endless traveling path, and a slurry-like fluid mixed material 12. Material supply means 13 for supplying, and material layer forming means 15 for supplying the fluid mixed material 12 onto the filter cloth 11 from the upstream side in the running direction of the filter cloth 11 to form a material layer 14 having a predetermined thickness. ing. The filter cloth 11 is made of a filtering (filtration) sheet material having a predetermined width, and has a flat substantially horizontal traveling area 11a in the middle of the endless traveling path.
The material supply means 13 includes a material stirring tank 21 and a plurality of mortar pumps 22 connected thereto, and the fluid mixed material 12 (hereinafter, also simply referred to as the material 12) from the mortar pump 22 is supplied through material supply hoses 23a and 23b. It is supplied to the layer forming means 15. The material 12 contains the cement and the reinforcing fiber material and is stirred and mixed together with water in the material stirring tank 21.
For example, it is made of cement, slag, pulp, lightweight material and the like.
The material layer forming means 15 has a kinion pump 30 that discharges the material 12 from the mortar pump 22 while measuring the material. The kinion pump 30 supplies the material 12 onto the filter cloth 11 in a substantially layered manner. Material layer 1 on top
4 are formed. The manufacturing apparatus further includes a loop-shaped chain conveyor 40 having an endless transport path, and a plurality of suction boxes 41 supported by the chain conveyor 40. The water contained in the layer 14 is sucked downward, and the material layer 14 is dehydrated.

As shown in FIGS. 3 to 5, the chain conveyor 40 includes a chain link 40a connected to the suction box 41, a connection pin 40b for connecting the chain links 40a to each other so as to be rotatable, and a connection pin 40b. And a pair of upstream and downstream sprockets 40d, 40e for supporting a loop-shaped chain 40c composed of a chain link 40a and a connecting pin 40b in a circulating manner.
A motor 40f (see FIG. 2) that drives a chain 40c by rotating a pair of downstream sprockets 40e;
The chain 40c includes a plurality of guide members 40g for guiding the chain 40c along the endless transport path. The chain conveyor 40 includes a plurality of suction boxes 41 along an endless moving path of the filter cloth 11 in an upper horizontal traveling section (hereinafter, referred to as an upper traveling section) extending substantially horizontally between the sprockets 40d and 40e. At a moving speed synchronized with the filter cloth 11.

As shown in FIGS. 6 and 7, each suction box 41 has a suction surface portion 42 in which a large number (a plurality of) of suction holes 42a are formed, and one suction hole 42a communicating with each of the suction holes 42a.
Back portion 43 in which one or a plurality of negative pressure forming holes 43a are formed
And a rubber sliding seal 44 attached to the back surface 43 so as to surround the negative pressure forming hole 43a. The suction box 41 is provided with the filter cloth 11 in a predetermined section while being conveyed by the chain conveyor 40. It faces the lower surface of the substantially horizontal traveling area 11a. Further, the plurality of suction boxes 41 traveling in contact with the lower surface of the substantially horizontal traveling area 11a of the filter cloth 11 have one suction surface portion 42 located on the same plane and have one flat supporting surface (substantially horizontal traveling surface). Each is guided by a plurality of guide rollers 45a and 45b so as to form a flat surface supporting the region 11a).

A trough 50 is provided on the rear side of the suction box 41 facing the lower surface of the substantially horizontal traveling area 11a of the filter cloth 11, that is, below the suction box 41.
A sliding seal 51 that slides on a sliding seal 44 portion of a predetermined number of suction boxes 41 among the suction boxes 41 running on the upper running section of the chain conveyor 40, and a negative pressure forming hole of the predetermined number of suction boxes 41. And a suction groove 52 extending in the moving direction of the filter cloth 11 so as to face the surface 43a. The sliding seal 51 is formed with a hole 51a having the same shape as the suction groove 52 or a substantially similar shape to the suction groove 52 having an opening area slightly different from that of the suction groove 52. Pressure forming hole 43
a, the predetermined number of negative pressure forming holes 43
The inside of a predetermined number of suction boxes 41 and the suction grooves 52 communicate with each other through “a”. A vacuum pump 54 is connected to the inside of the suction groove 52 of the trough 50 via a separator 53 which is a liquid / gas separation device. The vacuum pump 54 exhausts the inside of the suction groove 52 to a predetermined negative pressure (atmospheric pressure). (The following predetermined pressure). The separator 53 and the vacuum pump 54, together with the trough 50, pass through the filter cloth 11 via a predetermined number of suction boxes 41 facing the substantially horizontal traveling area 11a of the filter cloth 11.
A suction and dewatering means 55 for sucking and dehydrating moisture from the upper material layer 14 is configured to perform dehydration by vacuum suction with a vacuum pump 54 while separating moisture and air in the separator 53. 56 is the sliding seal 51
Is detachably attached to the main body 57 of the trough 50.

Hereinafter, the structure of the apparatus above the filter cloth 11 will be described in order from the upstream side in the transport direction.
1 is a defoaming roll that is opposed to the upper surface in parallel at a predetermined interval. The defoaming roll 61 rotates while being in contact with the material layer 14 on the upstream side in the substantially horizontal traveling area 11a of the filter cloth 11, and breaks bubbles in the material layer 14. First and second doctor rolls 62 and 63 are provided near the defoaming roll 61. The first doctor roll 62 is disposed on the upstream side of the defoaming roll 61 so as to face the upper surface of the filter cloth 11 in parallel at a predetermined interval, and the kinion pump is disposed on the upstream side in the substantially horizontal traveling area 11a of the filter cloth 11. 30 while rotating while contacting the material layer 14 supplied on the filter cloth 11, the material layer 1 is rotated.
4 is made uniform to more reliably perform the defoaming treatment by the defoaming roll 62. The second doctor roll 63 is provided on the downstream side of the defoaming roll 61 so as to face the upper surface of the filter cloth 11 in parallel at a predetermined interval, and the upstream side of the filter cloth 11 in the substantially horizontal traveling area 11a. By rotating while contacting the material layer 14 that has been defoamed by the defoaming roll 61, the thickness of the material layer 14 is made uniform and a predetermined layer thickness is achieved.

A mirror roll 64 and a press roll 65 are provided downstream of the filter cloth 11 in the substantially horizontal travel area 11a, and the mirror roll 64 is spaced apart from the substantially horizontal travel area 11a of the filter cloth 11 by a predetermined distance. , And is in contact with the upper surface of the dehydrated material layer 14 from which approximately half of the moisture has been sucked by the suction box 41 and the suction dehydrating means 55. The mirror roll 64 rotates while contacting the material layer 14 so as to flatten the surface of the dehydrated material layer 14 and make the surface smoother (hereinafter, referred to as smoothing). Has become. The press roll 65 is supported by a first press unit frame (not shown) so as to face the upper surface of the filter cloth 11 in parallel at a predetermined interval downstream of the mirror roll 63. This press roll 65
Has an outer peripheral uneven surface portion 65a that comes into contact with the material layer 14 smoothed by the mirror surface roll 64, and the outer peripheral uneven surface portion 6a
5a, the filter cloth 11 is rotated while pressing the material layer 14 on the downstream side in the substantially horizontal traveling area 11a, and the material layer 14 is rotated.
The concave / convex pattern corresponding to the outer peripheral concave / convex surface portion 65a is transferred to the outer peripheral surface. The press roll 65 is movable in a direction perpendicular to the traveling direction of the filter cloth 11 together with a driving means (not shown) such as a motor and a gear supported by the first press unit frame. . Further, a press roll 66 can be installed in the vicinity of the installation position of the press roll 65, and the press roll 66, like the press roll 65, is provided on the downstream side of the mirror roll 63.
The first press unit frame (not shown) is supported by a second press unit frame (not shown) so as to face the upper surface of the first unit 1 in parallel at a predetermined interval.
And the drive means such as a motor and gears supported by the press unit frame of the present invention can be moved in a direction orthogonal to the moving direction of the filter cloth 11.

On the downstream side of the press roll 65, a blower 72 for blowing air to the material layer 14 to separate the material layer 14 from the filter cloth 11, and adjacent to the filter cloth 11 on the downstream side of the substantially horizontal traveling area 11a. To sixth transport conveyors 73a, 73b, 73 for continuously transporting the material layer 14 by pressing
c, 73d, 73e, and 73f are provided, and the material is moved obliquely according to the transport speed of the material layer 14 so as to cut the material layer 14 to a predetermined length on the first transport conveyor 73a. Diagonal cutter 74 for cutting the layer 14
An automatic plate pressure measuring device 75 for measuring the thickness of the material layer 14 cut to a predetermined length on the third conveyor 73c, and a material layer 14 having a predetermined length at the downstream end of the fourth conveyor 73d.
A water jet device 76 as a vertical cutting means for cutting and dividing a sheet into a predetermined width, and a dividing plate (not shown) from a plurality of material increasers 14 cut into a predetermined length and width are placed on a lateral carriage 78. And a plate collecting machine 77 to be taken out.

A known press machine is arranged downstream of the sheet collecting machine 77, a mold for patterning having an uneven surface portion is mounted on the press machine, and both press rolls 65 and 66 are combined with the filter cloth 11 substantially. It is retracted to the outside of the horizontal traveling area 11a, and in this state, a material layer having a predetermined length and width is loaded into the press machine, and the uneven surface portion is provided with an uneven pattern corresponding to the uneven surface portion by the uneven surface portion. be able to.

On the other hand, left and right clamp mechanisms 80 are provided at both ends of the suction box 41, respectively, and each clamp mechanism 80 presses against both ends in the width direction of the filter cloth 11 as shown in FIG. A block 81, a clamp arm 82 supporting the pressing block 81 at one end 82a, a cam follower 83 mounted on the other end 82c of the clamp arm 82, and an intermediate portion 82b of the clamp arm 82 are swingably supported. And a frame portion 84 provided at an end of the suction box 41. The clamp arm 82
When the suction box 41 travels in the upward running section (the upper traveling path of the endless traveling path), the pressing block 81 is swung by its own weight in a direction approaching the suction surface portion 42 of the suction box 41, and the suction box 41 is moved. When the vehicle travels in the lower running section, the pressing block 81 is swung in a direction away from the suction surface portion 42 of the suction box 41 by its own weight. Further, when each suction box 41 moves upward from below the center height of the sprockets 40d, 40e, the clamp arm 82 moves the cam follower 83 to the circular regulating plate 87.
(See FIG. 5) to restrict the pressing block 81 from swinging in a direction approaching the suction surface portion 42 of the suction box 41 due to its own weight.

The pressing block 81 or the clamp arm 82 engages with the first clamping operation cams 31 and 32 shown in FIG. 3A in a predetermined section where the cam follower 83 is separated from the regulating plate 87. The cams 31 and 32 guide the guide from a position indicated by a virtual line in FIG. 9 to a position indicated by a solid line in FIG. The swing position of the clamp arm 82 indicated by a solid line in FIG.
This is the position where swinging to the side starts, that is, where the clamping operation is started. When the clamp arm 82 is located at the clamp operation start position, the cam follower 83 at the other end is positioned as shown in FIG.
Abuts on the second clamp operation cam 33 shown in FIG. This second
The clamp operation cam 33 is provided near the upstream end of the substantially horizontal traveling section on the upper side of the chain conveyor 40 and the right and left clamp mechanisms 8.
0, each of which restricts the pressing block 81 from moving toward the suction surface portion 42 by its own weight, and the pressing block 81 is moved toward the suction surface 42a with the conveyance of the suction box 41. The swing of the clamp arm 82 is controlled so as to gradually approach the side edge of the filter cloth 11 without impact. Note that the first clamp operation cams 31 and 32 become unnecessary depending on the shapes of the pressing block 81 and the swing arm 82. In this case, the second clamp operation cams 33 need to be provided in the entire area between the positions A1 to A3. There is. The cam follower 83 is made of a self-lubricating resin material, for example, polyacetal.

In FIG. 10, reference numeral 91 denotes a cam follower 83 near the downstream end of the upper traveling section of the chain conveyor 40.
The clamp release cam 91 is engaged with the other end portion 82c of the clamp arm 82 via the clamp arm. Although the overall cam shape is not shown, the suction box 41 is located on the downstream side of the upper traveling section of the chain conveyor 40. When reaching the vicinity of the end, as shown in FIG. 3B, the clamp arm 82 is swung so that the pressing block 81 is separated from the suction surface portion 42 against its own weight. The clamp release cam is not limited to the one that engages with the clamp arm 82, and may be one that engages with the pressing block 81.

A roller 85 is rotatably supported on the frame portion 84 of the clamp mechanism 80, and the suction box 41 is moved below the endless traveling path of the chain conveyor 40 (hereinafter, referred to as a downward traveling section). When the vehicle travels, the rollers 85 at both ends of the suction box 41 roll on the left and right guide rails 46 so that the suction box 41 is guided and supported on the guide rails 46.
In FIG. 8, reference numeral 86 denotes a back surface 43 of the suction box 41.
With positioning angles attached to both ends of the
When the positioning angle 86 comes into contact with a side guide rail (not shown), the suction box 41 is moved in the longitudinal direction (the filter cloth 11).
In the width direction).

As described above, the clamp mechanism 80 can press the side end portion of the filter cloth 11 against the suction surface portion 42 of the suction box 41 by the pressing block 81 and clamp it. By a plurality of pairs of clamp mechanisms 80 of a plurality of suction boxes 41 traveling
Both ends of the filter cloth 11 are pressed against the suction surface portions 42 of the plurality of suction boxes 41 traveling in the upper running section over substantially the entire area of the substantially horizontal traveling area 11a. They are driven at a synchronized speed. That is, the clamp mechanism 80, together with the chain conveyor 40, constitutes a moving unit that integrally moves the suction box 41 and the substantially horizontal traveling area 11a of the negative 1 in a substantially horizontal direction.

Next, the operation will be described. In the above cement-board manufacturing apparatus, the slurry-like fluid mixed material 12 is supplied from the plurality of mortar pumps 22 of the material supply means 13 to the kinion pump 30 of the material layer forming means 15 through the material supply hoses 23a and 23b. The fluid mixture material 12 is supplied onto the filter cloth 11 in a substantially layered form by the kinion pump 30. Then, after this material layer is flattened in advance by a doctor roll 62, the material layer is surely defoamed by a defoaming roll 61 having a large number of rows of projections, and is formed into a material layer 14 having a uniform layer thickness by a doctor roll 63. Be shaped.

On the other hand, slightly upstream of the defoaming roll 61, each suction box 41 is transported upward from the lower traveling section to the upper traveling section of the chain conveyor 40 by the sprocket 40d. At this time, each suction box 41 is
Of the suction box 41, the clamping mechanisms 80 at both ends of the suction box 41
In the downward running section, the pressing block 81 at the clamp release position (the position of the pressing block 81 shown in the lower part of FIG. 5 and the position shown by the phantom line in FIG. 8) is now sucked into the suction box 41 by its own weight. When the cam follower 83 at the other end of the clamp arm 82 engages with the regulating plate 87, it tries to swing toward the clamp position (the position indicated by the solid line in FIG. 8) so as to approach the surface portion 42. The pressing block 81 is moved above the filter cloth 11 in this state.

Immediately before the cam follower 83 separates from the regulating plate 87, that is, when the filter suction box 41 reaches the upstream end of the substantially horizontal traveling area 11a of the cloth 11, the pressing block 81 engages with the first clamp operation cams 31, 32. In the meantime, while the suction box 41 is transported from the position A1 to A3 in FIG. 3, the clamp arm 82 is moved from the position indicated by the imaginary line in FIG. 9 to the position indicated by the solid line in FIG. You will be guided to Accordingly, the clamp arm 82 is moved by its own weight, such as the pressing block 81, to the suction surface 42a of the suction box 41.
Starts swinging to the side, that is, starts the clamping operation.
At this time, the cam follower 83 comes into contact with the second clamp operation cam 33 to control the swing of the clamp arm 82,
As the suction box 41 is conveyed, the pressing block 81 moves to the suction surface 42.
The filter cloth 11 gradually approaches the side a and comes into contact with the side edge of the filter cloth 11 without impact.

When the suction box 41 reaches the contact position A2, both ends of the filter cloth 11 are clamped by the pressing block 81 on the suction surface 42 of the suction box 41, respectively. The suction surface portion 42 of the suction box 41 and a plurality of suction boxes 41 traveling at the same height on the downstream side of the suction box 41 form a bearing surface that flatly supports the substantially horizontal traveling area 11a of the filter cloth 11. It is formed.

On the upstream side of the substantially horizontal traveling area 11a of the filter cloth 11, a material layer 14 which is thus defoamed and flattened so as to have a uniform thickness is formed. Press block 8 of clamp mechanism 80 on both sides
1, the filter cloth 11 is clamped on the suction surface portion 42 of the suction box 41, and the filter cloth 11 starts to be transported integrally with the upper running section of the chain conveyor 40.

When the material layer 14 is conveyed integrally with the filter cloth 11 and the suction box 41 in the upper running section of the chain conveyor 40, the suction box 41 is vertically opposed to the trough 50 in a predetermined traveling area, and its sliding is performed. The dynamic seal 44 slides on the sliding seal 51 of the trough 50. At this time, the inside of the suction box 41 is connected to the trough 50 through the negative pressure forming hole 43a of the back surface 43 thereof.
The trough 50 communicates with the suction groove 52 of the
5, the moisture contained in the material layer 14 is removed together with the air by the filter cloth 11 and the holes 4 in the suction surface 42.
It is sucked into the suction box 41 through 2a. Therefore,
When the material layer 14 is located above the trough 50 in the upper running section of the chain conveyor 40, the material layer 14 travels horizontally while constantly sucking the moisture inside from the lower side, and is dehydrated until a required dehydration state is reached. Further, the moisture and the air introduced into the suction groove 52 of the trough 50 are separated by a separator 53 which is a liquid / gas separator, the moisture is drained from the separator 53, and the air is exhausted by a vacuum pump.

While each suction box 41 is transported from the upstream side to the downstream side of the substantially horizontal traveling area 11a of the filter cloth 11, the material layer 1
Almost half of the water 4 is sucked by the suction box 41 and the suction dewatering means 55, and the water is almost dehydrated.
The dehydrated material layer 14 is then brought into contact with the mirror roll 64, and the mirror roll 64 rotates with the rotation of the mirror roll 64.
Contact with the outer peripheral mirror surface portion in synchronization, and its surface is pressurized. The material layer 14 has a smoother surface. The suction of moisture in the material layer 14 through the suction box 41 ends immediately before or immediately before the mirror roll 64, and the material layer 14 that has passed through the mirror roll 64 is simply conveyed without suction dehydration.

The material layer 14 is then applied to the mirror roll 6
The roller reaches a position below the press roll 65 (roll with pattern) downstream of 3, and is pressed by the outer peripheral uneven surface 65a of the press roll 65, and the uneven pattern corresponding to the outer uneven surface 65a as the press roll 65 rotates as the press roll 65 rotates. Is transcribed. At this time, the rotation speed of the press roll 65 is controlled by a driving unit such as a motor and a gear supported by the first press unit frame so that the peripheral speed is equal to the transport speed of the material layer 14.

The patterned material layer 14 is separated from the filter cloth 11 by air blown from the blower 72 on the downstream side of the press roll 65, and continuously separated on the downstream side by the first to sixth conveyors 73a to 73f. Transported. Then, the sheet is cut to a predetermined length by the diagonal cutter 74 on the first conveyor 73a, and the sheet thickness is measured on the third conveyor 73c by the automatic sheet pressure measuring device 75, and then the downstream end of the fourth conveyor 73d. Is cut into a predetermined width by a water jet device 76, divided and cut into a predetermined length and width, and is taken out onto a carriage 78 by a sheet collecting machine 77.

On the other hand, when the suction box 41 reaches the vicinity of the downstream end of the upper traveling section, the cam follower 83 engages with the clamp release cam 91, and the pressing block 81 is moved with the movement of the suction box 41 in the transport direction. Is the suction box 41 against its own weight.
The swing of the clamp arm 82 is controlled so as to be separated from the suction surface 42 of the chain conveyor 40, and the suction box 41 is inverted and transported to the lower traveling section of the chain conveyor 40.

As described above, in the present embodiment, the pressing block 81 is swingably supported on both ends of the suction box 41 by the clamp arm 82 so as to move the pressing block 81 in a predetermined direction by its own weight. The block 81 is clamped near the upstream end of the upper running section.
1 and 32 to gradually approach the suction surface portion 42 of the suction box 41 as the suction box 41 moves, and clamp the clamp arm 82 when the suction box 41 reaches near the downstream end of the upper running section. The pressing block 81 is separated from the suction surface portion 42 against its own weight by engaging with the release cam 91. Therefore, the pressing block 81
It is not necessary to provide a complicated mechanism for moving the suction box to the clamp side and the clamp release side in each suction box. In addition, the clamp operation cams 31 and 32 and the clamp release cam 91 of the filter cloth 11 have a very simple configuration, and can be easily cleaned even during operation, so that malfunctions are less likely to occur.
Further, since the suction box 41 is provided with the regulating plate 87 for regulating the pushing block from swinging toward the filter cloth 11 due to its own weight in the reversing section where the suction section 41 shifts from the lower section to the upper section, the clamping operation is performed. The cams 31 and 32 can be formed in a very simple shape as shown. Also, by providing the cam follower 83 to the clamp arm 82,
The clamp operation can be made smooth and stable.

[0036]

According to the first aspect of the present invention, the pressing block which abuts and separates on both ends in the width direction of the filter cloth is moved by its own weight, and the upper side of the endless conveying path of the suction box is moved substantially horizontally. In the vicinity of the upstream end of the traveling section, the pressing block gradually approaches the suction surface of the suction box as the suction box moves, and near the downstream end of the upper substantially horizontal traveling section, the pressing block is moved by a cam. Since the suction block is separated from the suction surface against its own weight, it is not necessary to provide a complicated mechanism for moving the pressing block to the clamp side and the clamp release side in each suction box. And the clamp release cam can be made simple and easy to clean. As a result, it is possible to realize a simple clamp mechanism having a configuration that does not require maintenance, and to improve the productivity of the cement board.

According to the second aspect of the present invention, the regulating plate is provided to regulate the suction box from approaching to the suction surface by its own weight in the reversal section where the lower traveling section shifts from the lower traveling section to the upper traveling section. Therefore, it is possible to make the clamp operation cam simpler. According to the third aspect of the invention, by specifying the shape of the clamp arm and providing the cam follower, it is possible to make the clamp operation smooth and stable.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a cement-based board manufacturing apparatus according to the present invention.

FIG. 2 is a perspective view illustrating a schematic configuration of a manufacturing apparatus according to one embodiment.

FIG. 3 is a plan view of a main part of a chain conveyor of a manufacturing apparatus according to one embodiment, in which (a) shows an end on a material supply side and (b) shows an end on a discharge side of a processed material layer. ing.

FIG. 4 is a schematic diagram of a main part of a chain conveyor of the manufacturing apparatus according to one embodiment.

FIG. 5 is a view taken in the direction of arrows BB in FIG. 4;

FIG. 6 is an explanatory diagram of a suction box and a suction dewatering unit of the manufacturing apparatus according to one embodiment.

FIG. 7 is a cross-sectional view illustrating a sliding seal portion between the suction box and the trough of the manufacturing apparatus according to the embodiment.

FIG. 8 is a partial cross-sectional view of a suction box showing a configuration of a clamp mechanism of the manufacturing apparatus according to one embodiment.

FIG. 9 is an operation explanatory view of a second clamping operation cam of the manufacturing apparatus according to the embodiment.

FIG. 10 is a diagram illustrating the operation of the clamp release cam of the manufacturing apparatus according to the embodiment.

FIG. 11 is a partial cross-sectional view of a suction box showing a configuration of a conventional clamp mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Filter cloth 11a Substantially horizontal traveling area 12 Fluid mixed material 13 Material supply means 14 Material layer 15 Material layer forming means 31, 32 First clamp operation cam 33 Second clamp operation cam 40 Chain conveyor (moving means) 41 Suction box 42 Suction surface part 42a Suction hole 43 Back part 43a Negative pressure forming hole 44 Sliding seal 50 Trough 51 Sliding seal 52 Suction groove 53 Separator 54 Vacuum pump 55 Suction dehydrating means 61 Defoaming roll 63 Second doctor roll (doctor roll) 64 Mirror rolls 65, 66 Press rolls 65a, 66a Outer uneven surface portion 80 Clamp mechanism (moving means) 81 Press block 82 Clamp arm 83 Cam follower 87 Regulator plate 91 Clamp release cam

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Seiji Fukushima 2-1-2, Marunouchi, Chiyoda-ku, Tokyo Asahi Glass Co., Ltd.

Claims (3)

[Claims] 1. A filter cloth made of a filtering sheet material having a predetermined width and traveling along a predetermined traveling path including a substantially horizontal traveling area, and a slurry-like fluid mixed material containing cement and a reinforcing fiber material. A material supply unit for supplying, the material layer having a predetermined thickness in a width direction of the filter cloth by supplying the fluid mixed material onto the filter cloth from an upstream side of a substantially horizontal traveling area of the filter cloth; A material surface forming means for forming a plurality of suction holes, and a back surface portion on which a negative pressure forming hole communicating with each of the suction holes is formed, and arranged near the filter cloth. A plurality of suction boxes, and a suction surface portion of the plurality of suction boxes facing a lower surface of the filter cloth in the substantially horizontal travel region, and an endless transport path including upper and lower substantially horizontal travel sections of the plurality of suction boxes. Moving hand to move along A step, forming a negative pressure through the negative pressure forming hole in the plurality of suction boxes facing the filter cloth in the substantially horizontal travel area, and forming a material on the filter cloth in the substantially horizontal travel area through the suction surface of the suction box. Suction suction dewatering means for sucking and dewatering moisture from the layer, provided at both ends of each suction box, and when the suction box is transported in the upper substantially horizontal traveling section, the width direction both ends of the filter cloth are A plurality of pairs of clamp mechanisms that press against the suction surface and clamp the same, wherein the clamp mechanism is movable in a predetermined direction so as to contact and separate both ends in the width direction of the filter cloth. And a clamp arm connected to the pressing block and supported at both ends of the suction box so as to be movable in the predetermined direction by its own weight. And the pressure is engaged with the clamp arm or the pressing block in the vicinity of the upstream end of the upper substantially horizontal traveling section, and is urged to approach the suction surface by its own weight in the vicinity of the upstream end. A clamp operation cam for regulating the movement of the block and for gradually bringing the pressing block closer to the suction surface of the suction box with the movement of the suction box; and a clamp near the downstream end of the upper substantially horizontal traveling section. When the suction box is engaged with an arm or a pressing block and reaches near the downstream end of the upper substantially horizontal traveling section, the pressing block is moved from the suction surface of the suction box against the weight of the pressing block. A clamp release cam to be separated,
An apparatus for manufacturing a cement board, comprising: 2. The suction box engages with the clamp arm or the pressing block in a reverse section where the lower travel section shifts from the lower travel section to the upper travel section, and approaches the suction surface portion by its own weight in the reverse section. The cement board manufacturing apparatus according to claim 1, further comprising a regulating plate that regulates the movement of the pressing block that is urged to move. 3. The clamp arm has one end for supporting the pressing block, an intermediate portion swingably supported on both ends of the suction box, and the other end on which a rotatable cam follower is mounted. 2. The cement board manufacturing apparatus according to claim 1, wherein a cam follower at the other end is engaged with the clamp operation cam and the clamp release cam.