TW202130881A - Sealing method and device for suction roll - Google Patents

Sealing method and device for suction roll Download PDF

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TW202130881A
TW202130881A TW109130555A TW109130555A TW202130881A TW 202130881 A TW202130881 A TW 202130881A TW 109130555 A TW109130555 A TW 109130555A TW 109130555 A TW109130555 A TW 109130555A TW 202130881 A TW202130881 A TW 202130881A
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Taiwan
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suction
suction roller
gap
peripheral surface
negative pressure
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TW109130555A
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Chinese (zh)
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TWI746152B (en
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長谷川智基
露木裕一朗
槌谷和義
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日商長谷川鐵工所股份有限公司
學校法人東海大學
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/50—Suction boxes with rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D21F3/105—Covers thereof

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

An object of the present invention is to maintain negative pressure of a negative pressure chamber partitioned inside a suction box while keeping a frame belt provided in the suction box without contacting an inner peripheral surface of a suction roll. To achieve the object, there is provided a sealing method for a suction roller (10), in which a gap (G) is formed between the inner peripheral surface of the suction roller (10) and the frame belt (30), such that a sealing fluid is supplied to the gap (G) to seal to the gap (G) by liquid.

Description

吸輥之密封方法及裝置Sealing method and device of suction roller

本發明係關於設在配置於吸輥的內空部之吸引箱的框帶，將與吸輥的內周面對向而區劃於吸引箱的內部之負壓室進行密封用的吸輥之密封方法及装置。The present invention relates to the sealing of the suction roller used to seal the frame belt of the suction box arranged in the inner space of the suction roller, and the suction roller is sealed in a negative pressure chamber that faces the inner circumferential surface of the suction roller and is partitioned inside the suction box. Method and device.

在抄紙機的脫水製程，如專利文獻1所記載，在吸輥的內空部配置吸引箱，使設在吸引箱的框帶滑接於吸輥的內周面而在該吸引箱的內部區劃負壓室，將吸引箱的負壓室維持於負壓，藉此，使在吸輥的外周面被搬運的濕紙的水分通過該吸輥的吸引孔而經由吸引箱之負壓室，進行脫水。 [先前技術文獻] [專利文獻]In the dehydration process of a paper machine, as described in Patent Document 1, a suction box is arranged in the hollow part of the suction roll, and the frame belt provided in the suction box is slidably connected to the inner peripheral surface of the suction roll to divide the inside of the suction box. The negative pressure chamber maintains the negative pressure chamber of the suction box at a negative pressure, whereby the moisture of the wet paper conveyed on the outer peripheral surface of the suction roller passes through the suction hole of the suction roller and passes through the negative pressure chamber of the suction box. Dehydrated. [Prior Technical Literature] [Patent Literature]

[專利文獻1]日本特開2005-36329號公報[Patent Document 1] Japanese Patent Application Publication No. 2005-36329

[發明所欲解決之問題][The problem to be solved by the invention]

設在以往的吸引箱之框帶(deckle strap)對吸輥的內周面滑接，用以維持區劃於該吸引箱的內部之負壓室的負壓。因此，吸輥的內周面與框帶之摩擦大，故，造成框帶需要高頻率地進行更換，且吸輥的驅動能也變得龐大。又，為了謀求吸輥的內周面與框帶之摩擦的減低，被迫設置對框帶的滑動部供給潤滑用噴灑水之潤滑用噴灑器，或採用低摩擦係數的碳樹脂等作為框帶的材料，造成成本高漲。The deck strap provided in the conventional suction box is slidably connected to the inner peripheral surface of the suction roller to maintain the negative pressure of the negative pressure chamber partitioned inside the suction box. Therefore, the friction between the inner peripheral surface of the suction roller and the frame belt is large, so that the frame belt needs to be replaced at a high frequency, and the driving energy of the suction roller also becomes huge. In addition, in order to reduce the friction between the inner peripheral surface of the suction roller and the frame belt, it is forced to install a lubrication sprayer that supplies lubricating spray water to the sliding part of the frame belt, or use carbon resin with low friction coefficient as the frame belt. Materials, causing high costs.

本發明之課題在於既可使設在吸引箱之框帶(deckle strap)對吸輥的內周面非接觸，亦可維持區劃於該吸引箱的內部之負壓室的負壓。 [解決問題之技術手段]The subject of the present invention is to maintain the negative pressure of the negative pressure chamber partitioned inside the suction box without contacting the inner peripheral surface of the suction roller with the frame belt (deckle strap) provided in the suction box. [Technical means to solve the problem]

請求項1之發明，一種吸輥之密封方法，係在吸輥的內空部配置吸引箱，使設在吸引箱的框帶與吸輥的內周面相對向而在該吸引箱的內部區劃負壓室，將吸引箱的負壓室維持於負壓，藉此，使在吸輥的外周面被搬運的濕紙的水分通過該吸輥的吸引孔而經由吸引箱之負壓室，進行脫水的密封方法，其特徵為，在吸輥的內周面與框帶之間形成間隙，藉由對此間隙供給密封用流體，將該間隙進行液封。The invention of claim 1, a method for sealing a suction roller, is to arrange a suction box in the hollow part of the suction roller, so that the frame belt provided in the suction box faces the inner peripheral surface of the suction roller and divides the inside of the suction box The negative pressure chamber maintains the negative pressure chamber of the suction box at a negative pressure, whereby the moisture of the wet paper conveyed on the outer peripheral surface of the suction roller passes through the suction hole of the suction roller and passes through the negative pressure chamber of the suction box. The sealing method for dehydration is characterized in that a gap is formed between the inner peripheral surface of the suction roller and the frame band, and the gap is liquid-sealed by supplying a sealing fluid to the gap.

請求項2之發明，係如請求項1之發明，其中，可調整形成於前述吸輥的內周面與框帶之間的間隙之大小。The invention of claim 2 is the invention of claim 1, wherein the size of the gap formed between the inner peripheral surface of the suction roller and the frame belt can be adjusted.

請求項3之發明，一種吸輥之密封裝置，係在吸輥的內空部配置吸引箱，使設在吸引箱的框帶與吸輥的內周面相對向而在該吸引箱的內部區劃負壓室，將吸引箱的負壓室維持於負壓，藉此，使在吸輥的外周面被搬運的濕紙的水分通過該吸輥的吸引孔而經由吸引箱之負壓室，進行脫水的密封裝置，其特徵為，在吸輥的內周面與框帶之間形成間隙，並具有對前述間隙供給密封用流體而將該間隙進行液封之液封裝置。The invention of claim 3, a sealing device for a suction roller, a suction box is arranged in the hollow part of the suction roller, and the frame belt provided on the suction box is opposed to the inner peripheral surface of the suction roller to divide the inside of the suction box The negative pressure chamber maintains the negative pressure chamber of the suction box at a negative pressure, whereby the moisture of the wet paper conveyed on the outer peripheral surface of the suction roller passes through the suction hole of the suction roller and passes through the negative pressure chamber of the suction box. The sealing device for dehydration is characterized by forming a gap between the inner peripheral surface of the suction roller and the frame belt, and having a liquid sealing device that supplies a sealing fluid to the gap and liquid seals the gap.

請求項4之發明，係如請求項3之發明，其中，可調整形成於前述吸輥的內周面與框帶之間的間隙之大小。The invention of claim 4 is the invention of claim 3, wherein the size of the gap formed between the inner peripheral surface of the suction roller and the frame belt can be adjusted.

請求項5之發明，係如請求項3或4之發明，其中，前述液封裝置係具有流體供給路徑，該流體供給路徑係配設於框帶的內部，開口於沿著吸輥的內周面之該框帶的圓弧狀表面，並呈沿著吸輥的中心軸形成連續的狹縫狀，從該流體供給路徑朝向吸輥的內周面之流體的流出方向係對該吸輥的吸引孔呈非平行。 [發明效果]The invention of claim 5 is the invention of claim 3 or 4, wherein the liquid sealing device has a fluid supply path that is arranged inside the frame belt and opens along the inner circumference of the suction roller The arc-shaped surface of the frame belt on the surface is in the shape of a continuous slit along the central axis of the suction roller. The outflow direction of the fluid from the fluid supply path toward the inner peripheral surface of the suction roller is the direction of the suction roller. The suction holes are non-parallel. [Effects of the invention]

(請求項1、3) (a)藉由在吸輥的內周面與框帶之間形成間隙，藉由對此間隙供給密封用流體，將該間隙進行液封，使得既可使設在吸引箱之框帶對吸輥的內周面非接觸，亦可維持區劃於該吸引箱的內部之負壓室的負壓。(Request items 1, 3) (a) By forming a gap between the inner peripheral surface of the suction roller and the frame band, by supplying a sealing fluid to the gap, the gap is liquid-sealed, so that the frame band provided in the suction box can suck The inner peripheral surface of the roller is non-contact, and the negative pressure of the negative pressure chamber partitioned inside the suction box can also be maintained.

藉此，因框帶滑接於吸輥的內周面所引起之摩擦消失，可無限減低因框帶的磨耗所引起之更換頻率，亦可減低吸輥的驅動能。Thereby, the friction caused by the sliding of the frame belt on the inner peripheral surface of the suction roller disappears, the replacement frequency caused by the abrasion of the frame belt can be reduced infinitely, and the driving energy of the suction roller can also be reduced.

不需要對框帶的滑動部供給潤滑用噴灑水，也不需要採用低摩擦係數的碳樹脂等作為框帶的材料，能夠減低成本。There is no need to supply spray water for lubrication to the sliding part of the frame belt, and it is also unnecessary to use carbon resin with a low coefficient of friction as the material of the frame belt, which can reduce costs.

(請求項2、4) (b)藉由作成為可調整前述(a)的間隙的大小，可因應吸輥的內徑及旋轉數、負壓室所需要的負壓、連接於負壓室的真空泵浦的流量等之操作條件，形成適當的間隙。(Request 2, 4) (b) By making it possible to adjust the size of the gap in (a) above, it can be adjusted according to the inner diameter and number of rotations of the suction roller, the negative pressure required by the negative pressure chamber, the flow rate of the vacuum pump connected to the negative pressure chamber, etc. Operating conditions to form an appropriate gap.

(請求項5) (c)供給至前述(a)的間隙之密封用流體從配設於吸引箱的內部且沿著吸輥的中心軸形成為連續之狹縫狀的流體供給路徑被供給。因此，可對形成於吸輥的內周面與框帶之間的間隙的全區域，確實地供給密封用流體。(Request 5) (c) The sealing fluid supplied to the gap in (a) is supplied from a fluid supply path that is arranged in the suction box and formed in a continuous slit shape along the central axis of the suction roller. Therefore, the sealing fluid can be reliably supplied to the entire area of the gap formed between the inner peripheral surface of the suction roller and the frame band.

(d)從流體供給路徑朝向吸輥的內周面之流體的流出方向對該吸輥的吸引孔作成為非平行。因此，能夠迴避自流體供給路徑流出的流體貫通吸輥的吸引孔而飛散到處於該吸輥的外周面之濕紙的壞影響產生。(d) The outflow direction of the fluid from the fluid supply path toward the inner peripheral surface of the suction roller is made non-parallel to the suction hole of the suction roller. Therefore, it is possible to avoid the bad influence of the fluid flowing out from the fluid supply path passing through the suction hole of the suction roller and scattering to the wet paper on the outer peripheral surface of the suction roller.

圖1係顯示抄紙機的脫水製程，藉由對象輥2的壓力與生成於吸輥10的內部之負壓，將濕紙1的水分進行脫水(亦有不伴隨對象輥2的情況)。FIG. 1 shows the dehydration process of the paper machine. The moisture of the wet paper 1 is dehydrated by the pressure of the target roll 2 and the negative pressure generated inside the suction roll 10 (there may be cases where the target roll 2 is not accompanied).

吸輥10係伴隨配置於構成該吸輥10的單元10A的內空部之吸引箱20，以高速在此吸引箱20的周圍旋轉，並且，將區劃於吸引箱20的內部之負壓室21作成為負壓，藉此，將在吸輥10的外周面與該吸輥10的旋轉方向N相同方向被搬運的濕紙1所含的水分從貫通該吸輥10的單元10A之吸引孔11朝負壓室21吸引並進行脫水。連接於負壓室21之吸引導管12(圖2)係將連接於真空泵浦的該負壓室21作成為負壓，並且將被負壓室21吸引的水朝吸輥10及吸引箱20的外部進行回收。The suction roller 10 is accompanied by the suction box 20 arranged in the hollow portion of the unit 10A constituting the suction roller 10, and rotates around the suction box 20 at a high speed, and is divided into the negative pressure chamber 21 inside the suction box 20 A negative pressure is created, whereby the moisture contained in the wet paper 1 conveyed in the same direction as the rotation direction N of the suction roller 10 on the outer peripheral surface of the suction roller 10 is removed from the suction hole 11 of the unit 10A penetrating the suction roller 10 It is sucked toward the negative pressure chamber 21 and dehydrated. The suction duct 12 (Figure 2) connected to the negative pressure chamber 21 makes the negative pressure chamber 21 connected to the vacuum pump a negative pressure, and directs the water sucked by the negative pressure chamber 21 toward the suction roller 10 and the suction box 20 Recycling externally.

再者，吸輥10可為在單元10A的外周面具備橡膠加襯層者，在該情況之吸引孔11係為貫通單元10A及橡膠加襯層者。Furthermore, the suction roller 10 may be provided with a rubber lining layer on the outer peripheral surface of the unit 10A. In this case, the suction hole 11 may penetrate the unit 10A and the rubber lining layer.

吸引箱20係藉由具備與構成吸輥10的單元10A的內周面對向而在該吸引箱20的內部區劃負壓室21之框帶30，可維持該負壓室21的負壓。再者，框帶30，一般係具有：配置於在吸輥10的周方向上隔著與負壓室21對應的部分之兩側(在吸輥10的旋轉方向N，進入負壓室21側之入口側、從負壓室21側出來之出口側)的主框帶30M、及配置吸輥10的軸方向的兩側之端框帶30E，使兩側的主框帶30M及兩側的端框帶30E的四者在吸輥10的內周面相對向而區劃負壓室21。The suction box 20 is provided with a frame belt 30 that faces the inner peripheral surface of the unit 10A constituting the suction roller 10 and partitions a negative pressure chamber 21 inside the suction box 20, so that the negative pressure of the negative pressure chamber 21 can be maintained. Furthermore, the frame belt 30 generally has: it is arranged on both sides of the part corresponding to the negative pressure chamber 21 in the circumferential direction of the suction roller 10 (in the rotation direction N of the suction roller 10, it enters the side of the negative pressure chamber 21). The main frame belt 30M on the inlet side and the outlet side from the negative pressure chamber 21 side) and the end frame belts 30E on both sides of the axial direction where the suction roller 10 is arranged, so that the main frame belts 30M on both sides and the The four end frame belts 30E divide the negative pressure chamber 21 on the inner peripheral surface of the suction roller 10 facing each other.

再者，本發明可適用於主框帶30M與端框帶30E雙方，但，在以下的實施形態中，作為將本發明適用於主框帶30M者。In addition, the present invention can be applied to both the main frame band 30M and the end frame band 30E. However, in the following embodiments, the present invention is applied to the main frame band 30M.

如此，在吸引箱20，如圖2所示，在沿著吸輥10的周方向及軸方向之該吸輥10的內周面、和與該吸輥10的內周面相對向的主框帶30M的圓弧狀表面31之間，形成特定的隙間G，具有將該隙間G進行液封之液封裝置40，其具備對此隙間G供給密封用流體(在本實施形態為水)之流體供給路徑41。Thus, in the suction box 20, as shown in FIG. 2, the inner peripheral surface of the suction roller 10 along the circumferential direction and the axial direction of the suction roller 10 and the main frame facing the inner peripheral surface of the suction roller 10 A specific gap G is formed between the arc-shaped surfaces 31 with 30M, and a liquid sealing device 40 for liquid sealing the gap G is provided with a device for supplying a sealing fluid (water in this embodiment) to the gap G Fluid supply path 41.

在主框帶30M，從流體供給路徑41供給並流動於間隙G之密封用流體，需要確實地流動在該間隙G且在流通於該間隙G的期間可產生充分的壓力損失而達到確實的液封。為了對間隙G確實地流通密封用流體，產生充分的壓力損失，需要進行以下結構，亦即，確保從流體供給路徑41朝間隙G之充分的供水量，並且將間隙G的尺寸在該間隙G的全區域(沿著吸輥10的周方向及軸方向之間隙G的全區域)作成均等，並將流動於該間隙G的密封用流體之流通路徑長度C(後述的主片材30A之圓弧狀表面31沿著吸輥10的周方向所形成的長度)作成較大。前述的供給水及流通路徑長度C，係可依據吸輥10的內徑及旋轉數、負壓室21所需要的負壓、連接於負壓室21的真空泵浦的流量、間隙G的大小、沿著吸輥10的軸方向之間隙G的長度等，例如使用在流體力學能夠算出壓力損失之代表性的達西–威斯巴哈方程式(Darcy-Weisbach equation)算出。再者，作為使用於為了產生充分的壓力損失之計算式，若為在參數含有使用了流體力學之流通路徑尺寸、流速、摩擦損失係數，能夠算出壓力損失之方程式即可。In the main frame belt 30M, the sealing fluid supplied from the fluid supply path 41 and flowing in the gap G needs to flow reliably in the gap G, and must generate sufficient pressure loss while flowing through the gap G to achieve a reliable liquid seal up. In order to reliably circulate the sealing fluid to the gap G and generate sufficient pressure loss, it is necessary to have the following structure, that is, to ensure a sufficient amount of water supply from the fluid supply path 41 to the gap G, and to set the size of the gap G to the gap G The entire area (the entire area of the gap G along the circumferential direction and the axial direction of the suction roller 10) is made equal, and the flow path length C of the sealing fluid flowing in the gap G (the circle of the main sheet 30A described later) The length of the arc-shaped surface 31 formed along the circumferential direction of the suction roller 10) is made larger. The aforementioned water supply and circulation path length C can be based on the inner diameter and number of rotations of the suction roller 10, the negative pressure required by the negative pressure chamber 21, the flow rate of the vacuum pump connected to the negative pressure chamber 21, the size of the gap G, The length of the gap G along the axial direction of the suction roller 10, etc., is calculated using, for example, the representative Darcy-Weisbach equation that can calculate the pressure loss in fluid mechanics. Furthermore, as a calculation formula used to generate sufficient pressure loss, if the parameters include the flow path size, flow velocity, and friction loss coefficient using fluid mechanics, the pressure loss equation can be calculated.

在主框帶30M，對於在吸輥10的旋轉方向N上，入口側(i)與出口側(o)之各主框帶30Mi、30Mo在與吸輥10的內周面之間形成的間隙G，從對應的液封裝置40之流體供給路徑41所供給的密封用流體，係受到生成於吸引箱20的負壓室21之負壓的影響，朝吸引箱20的內部流動(圖2之L與R的流向)。此時，在入口側的主框帶30Mi所形成之間隙G，液封裝置40的流體供給路徑41所供給之密封用流體的流量(圖2的L)是受到吸輥10的旋轉之影響，較出口側的主框帶30Mo所形成之間隙G的流量(圖2的R)更大。這是意味用來在吸引箱20的負壓室21維持負壓之密封維持條件在入口側的主框帶30Mi更嚴格，決定入口側的主框帶30Mi之供水量、間隙G的尺寸等之密封維持條件，藉由在出口側亦採用此密封維持條件，在出口側的主框帶30Mo亦能夠保證密封維持。In the main frame belt 30M, the gap formed between the main frame belts 30Mi and 30Mo on the inlet side (i) and outlet side (o) in the rotation direction N of the suction roller 10 and the inner peripheral surface of the suction roller 10 G, the sealing fluid supplied from the fluid supply path 41 of the corresponding liquid sealing device 40 is affected by the negative pressure generated in the negative pressure chamber 21 of the suction box 20 and flows toward the inside of the suction box 20 (Fig. 2 The flow of L and R). At this time, the gap G formed by the main frame belt 30Mi on the inlet side and the flow rate of the sealing fluid supplied by the fluid supply path 41 of the liquid sealing device 40 (L in FIG. 2) are affected by the rotation of the suction roller 10. The flow rate of the gap G (R in FIG. 2) formed by the main frame belt 30Mo on the outlet side is larger. This means that the sealing condition for maintaining the negative pressure in the negative pressure chamber 21 of the suction box 20 is stricter on the main frame belt 30Mi on the inlet side, and determines the water supply volume of the main frame belt 30Mi on the inlet side, the size of the gap G, etc. Seal maintenance conditions. By adopting this seal maintenance condition on the outlet side, the main frame belt 30Mo on the outlet side can also ensure the maintenance of the seal.

主框帶30M的構成材料，由於不需要考量因與吸輥10的內周面之滑接所引起的摩擦產生，故，變得不需要選擇碳樹脂等的低摩擦係數材料，可因應需要，採用對在抄紙過程中混入的鹼、酸等具有優良之抗藥品性的氟樹脂、ABS樹脂等的三維造型等的樹脂成形品實施鐵氟龍塗布(Teflon coating)等之廉價的材料。The material of the main frame belt 30M does not need to consider the friction caused by the sliding contact with the inner peripheral surface of the suction roller 10, so it becomes unnecessary to select low-friction materials such as carbon resin. Low-cost materials such as Teflon coating are used for three-dimensional resin molded products such as fluororesin, ABS resin, etc., which have excellent chemical resistance, such as alkali and acid mixed in the papermaking process.

為了確保本發明之主框帶30M之密封性，例如，如藉由流體力學之科爾布魯克方程式(Colebrook equation)所示，使在與吸輥10之間形成一定的間隙G的主框帶30M之圓弧狀表面31的表面粗糙度提升即可。例如，在間隙G設為1.0mm、流通路徑長度C設為20mm的情況，將圓弧狀表面31之表面粗糙度增加至Ry30~Ry50的話，則密封性能提升大約15%。再者，作為能夠使用於為了確保主框帶30M的密封性之計算式，另外還有布拉休斯方程式(Blasius theorem)、凡寧方程式(Fanning's equation)、西奧多·馮·卡門方程式(Kármán-Nikuradse)等，在參數含有使用了流體力學之流通路徑的表面粗糙度、流通路徑尺寸、流速，可算出摩擦損失係數的方程式即可。In order to ensure the tightness of the main frame belt 30M of the present invention, for example, as shown by the Colebrook equation of fluid mechanics, the main frame belt 30M is formed with a certain gap G between the suction roller 10 The surface roughness of the arc-shaped surface 31 can be increased. For example, when the gap G is set to 1.0 mm and the flow path length C is set to 20 mm, if the surface roughness of the arc-shaped surface 31 is increased to Ry30 to Ry50, the sealing performance is improved by approximately 15%. In addition, as a calculation formula that can be used to ensure the tightness of the main frame belt 30M, there are also Blasius theorem, Fanning's equation, Theodor von Kamen equation ( Kármán-Nikuradse), etc., the parameters include the surface roughness of the flow path using fluid mechanics, the size of the flow path, and the flow velocity, and the friction loss coefficient equation can be calculated.

又，藉由在主框帶30M的圓弧狀表面31製作深度數μm之溝槽，藉由締捲(texturing)之摩擦學效應，可期待主框帶30M之進一步的密封性。溝槽的製作是在圓弧狀表面31，藉由在與吸輥10的旋轉方向交叉的方向上設定深度60μm左右的溝槽進行。In addition, by forming grooves with a depth of several μm on the arc-shaped surface 31 of the main frame tape 30M, and by the tribological effect of texturing, further sealing performance of the main frame tape 30M can be expected. The grooves are made on the arc-shaped surface 31 by setting grooves with a depth of about 60 μm in a direction crossing the rotation direction of the suction roller 10.

本發明之主框帶30M的磨耗的減低，雖因與流動於間隙G的密封用流體(水等)之摩擦存在無法作成零，但比起以往的接觸型，毫無疑問地可減低。因生成於吸引箱20的負壓室21之負壓的影響，會有框帶30M對吸輥10的內周面朝上下變動之虞，因此，為了迴避此情況，需要將主框帶30M對吸引箱20完全地固定。The wear reduction of the main frame belt 30M of the present invention cannot be made zero due to friction with the sealing fluid (water etc.) flowing in the gap G, but it can be undoubtedly reduced compared to the conventional contact type. Due to the influence of the negative pressure generated in the negative pressure chamber 21 of the suction box 20, the frame belt 30M may move up and down on the inner circumferential surface of the suction roller 10. Therefore, in order to avoid this situation, the main frame belt 30M needs to be opposed to The suction box 20 is completely fixed.

液封裝置40具備流體供給路徑41，其配設於主框帶30M的內部，且開口於沿著吸輥10的內周面之該主框帶30M的圓弧狀表面31，並呈沿著該吸輥10的中心軸形成為連續之狹縫狀。此時，從流體供給路徑41朝向吸輥10的內周面之流體的流出方向K，係對通過該流體供給路徑41的開口部的面前之吸輥10的吸引孔11的孔軸方向H呈交叉角(在入口側的主框帶30Mi，為α1，在出口側的主框帶30Mo，為α2)並互相非平行為佳(圖2)。The liquid sealing device 40 is provided with a fluid supply path 41, which is arranged inside the main frame belt 30M and opens on the arc-shaped surface 31 of the main frame belt 30M along the inner peripheral surface of the suction roller 10, and is formed along the The central axis of the suction roller 10 is formed in a continuous slit shape. At this time, the outflow direction K of the fluid from the fluid supply path 41 toward the inner peripheral surface of the suction roller 10 is relative to the hole axis direction H of the suction hole 11 of the suction roller 10 in front of the opening of the fluid supply path 41. It is better that the crossing angle (the main frame belt 30Mi on the entrance side is α1, and the main frame belt 30Mo on the outlet side is α2) and are preferably non-parallel to each other (Figure 2).

將來自於流體供給路徑41的流體之流出方向K對吸引孔11的孔軸方向H呈前述交叉角α1、α2，是為了防止該流體從吸引孔11朝濕紙1逆流。以各吸引孔11的孔軸方向H為基準之α1、α2的方向，可為沿著吸輥10的旋轉方向N之方向(圖2的α2)，亦可為對吸輥10的旋轉方向N之相反方向(圖2的α1)。The outflow direction K of the fluid from the fluid supply path 41 has the aforementioned crossing angles α1 and α2 with respect to the hole axis direction H of the suction hole 11 in order to prevent the fluid from flowing backward from the suction hole 11 to the wet paper 1. The directions α1 and α2 based on the hole axis direction H of each suction hole 11 may be the direction along the rotation direction N of the suction roller 10 (α2 in FIG. 2), or the rotation direction N of the counter suction roller 10 The opposite direction (α1 in Figure 2).

再者，圖5的α2為朝向對吸輥10的旋轉方向N之相反方向的交叉角的例子。In addition, α2 in FIG. 5 is an example of an angle of intersection in a direction opposite to the rotation direction N of the suction roller 10.

在本實施形態，主框帶30M係如圖3所示，被2分成主片材30A與副片材30B，主片材30A與副片材30B接合之接合面，形成有流體供給路徑41之孔狀路徑41r、和與該孔狀路徑41r連通的狹縫狀路徑41s，兩片材30A、30B係藉由螺栓32緊固，設在主片材30A之安裝用凸部33嵌合安裝於設在吸引箱20的安裝用凹部23。在主框帶30M的主片材30A及副片材30B的端面，藉由螺栓35固定有從側面關閉流體供給路徑41之蓋34，設在蓋34並朝吸輥10的外部延伸之密封用流體的供水管42連接於流體供給路徑41的孔狀路徑41r(圖1)。In the present embodiment, the main frame belt 30M is divided into two main sheets 30A and sub-sheets 30B, as shown in FIG. The hole-shaped path 41r and the slit-shaped path 41s communicating with the hole-shaped path 41r, the two sheets 30A, 30B are fastened by bolts 32, and the mounting convex portion 33 provided on the main sheet 30A is fitted and mounted on The recess 23 for attachment is provided in the suction box 20. On the end faces of the main sheet 30A and the sub sheet 30B of the main frame belt 30M, a cover 34 that closes the fluid supply path 41 from the side is fixed by bolts 35, and is provided on the cover 34 and extends toward the outside of the suction roller 10 for sealing The water supply pipe 42 for the fluid is connected to the hole-shaped path 41r of the fluid supply path 41 (FIG. 1 ).

在吸引箱20，主框帶30M的圓弧狀表面31與吸輥10的內周面之間所形成的間隙G，由於該間隙G在吸輥10的內空部形成，因此，不易測定。作為一個測定方法，將尺寸較吸輥10的吸引孔11小的測定具從該吸引孔11穿通直到抵接於主框帶30M的圓弧狀表面31，藉由此測定具，測定吸輥10的厚度加上間隙G後之長度，從該測定長度減去吸輥10的厚度，藉此算出間隙G。In the suction box 20, the gap G formed between the arc-shaped surface 31 of the main frame belt 30M and the inner peripheral surface of the suction roller 10 is not easy to measure because the gap G is formed in the hollow portion of the suction roller 10. As a measuring method, a measuring tool smaller in size than the suction hole 11 of the suction roller 10 is penetrated from the suction hole 11 until it abuts on the arc-shaped surface 31 of the main frame belt 30M, and the suction roller 10 is measured by this measuring tool. The thickness of φ is added to the length of the gap G, and the thickness of the suction roller 10 is subtracted from the measured length to calculate the gap G.

在吸引箱20，主框帶30M的圓弧狀表面31與吸輥10的內周面之間所形成的間隙G，可作為實驗值或理論值加以求出。其中，實際上，在操作中需要進行間隙G的微調整。此微調整係預先設置使安裝於吸引箱20的主框帶30M的圓弧狀表面31對吸輥10之內周面可位移的汽缸等之框位移裝置，使主框帶30M的圓弧狀表面31對吸輥10的內周面位移，調整間隙G，讓吸引箱20之負壓室21的負壓到達目標值。In the suction box 20, the gap G formed between the arc-shaped surface 31 of the main frame belt 30M and the inner peripheral surface of the suction roller 10 can be obtained as an experimental value or a theoretical value. Among them, in fact, fine adjustment of the gap G is required during operation. This fine adjustment system is pre-installed with a frame displacement device such as a cylinder that makes the arc-shaped surface 31 of the main frame belt 30M installed on the suction box 20 displaceable to the inner peripheral surface of the suction roller 10, so that the main frame belt 30M has an arc shape The surface 31 is displaced to the inner peripheral surface of the suction roller 10, and the gap G is adjusted so that the negative pressure of the negative pressure chamber 21 of the suction box 20 reaches the target value.

且，在吸引箱20，具有間隙調整裝置50，其可調整形成於吸輥10的內周面與主框帶30M之間的間隙G的大小。In addition, the suction box 20 has a gap adjustment device 50 that can adjust the size of the gap G formed between the inner peripheral surface of the suction roller 10 and the main frame belt 30M.

間隙調整裝置50係如圖3所示，對吸引箱20的安裝用凹部23的底面與嵌合於此安裝用凹部23的主框帶30M的安裝用凸部33的前端面之間，***裝設壓縮線圈彈簧等的彈推體51，將該主框帶30M朝吸輥10的內周面之側的突出方向彈推。又，將藉由固定於吸引箱20的安裝用凹部23的側壁之汽缸等出沒之止擋銷52對設在主框帶30M之安裝用凸部33的側面33A之傾斜溝面36，從與前述主框帶30M的突出方向正交的方向進行卡合。在卡合於傾斜溝面36的止擋銷52的前端部，包覆著用來使與該傾斜溝面36的滑動變佳之蓋子狀治具J。由於藉由彈推體51朝吸輥10的內周面彈推之主框帶30M會因止擋銷52之前述卡合而停止，故，藉由該止擋銷52之前述出沒量的調整，能夠調整框帶30M的圓弧狀表面31對吸輥10的內周面之接近量(換言之，為間隙G)。藉由預先以實驗等求取對使止擋銷52出沒的汽缸53之氣體壓力、和與此氣體壓力對應而主框帶30M的圓弧狀表面31所形成的間隙G之相關關係，能夠將前述的氣體壓力施加於汽缸53，設定適當的間隙G。As shown in FIG. 3, the gap adjusting device 50 is inserted between the bottom surface of the mounting concave portion 23 of the suction box 20 and the front end surface of the mounting convex portion 33 of the main frame belt 30M fitted into the mounting concave portion 23. An urging body 51 such as a compression coil spring is provided to urge the main frame belt 30M in the protruding direction on the side of the inner peripheral surface of the suction roller 10. In addition, a stopper pin 52 that is invaded by a cylinder or the like fixed to the side wall of the installation recess 23 of the suction box 20 is opposed to the inclined groove surface 36 provided on the side surface 33A of the installation convex portion 33 of the main frame band 30M from and The aforementioned main frame band 30M is engaged in a direction orthogonal to the protruding direction. The front end portion of the stopper pin 52 engaged with the inclined groove surface 36 is covered with a lid-shaped jig J for improving the sliding with the inclined groove surface 36. Since the main frame belt 30M that is pushed toward the inner peripheral surface of the suction roller 10 by the elastic body 51 will stop due to the aforementioned engagement of the stopper pin 52, the adjustment of the stopper pin 52 is , It is possible to adjust the approach amount (in other words, the gap G) of the arc-shaped surface 31 of the frame band 30M to the inner peripheral surface of the suction roller 10. The correlation between the gas pressure of the cylinder 53 that causes the stop pin 52 to invade and the gap G formed by the arc-shaped surface 31 of the main frame 30M corresponding to the gas pressure is calculated in advance through experiments, etc. The aforementioned gas pressure is applied to the cylinder 53, and an appropriate gap G is set.

間隙調整裝置50係如圖4所示，亦可在吸輥10的橫斷面上，設定將安裝有主框帶30M的吸引箱20配置於吸輥10的內空部之狀態，預先算出主框帶30M之圓弧狀表面31的例如頂部31P對吸輥10的內周面所形成的各種間隔δ、和與該間隔δ對應之前述間隙G，將與該等的各間隙G對應之各刻度54預先刻設於與吸引箱20的安裝用凹部23的上端面23A對應之主框帶30M的側面33A來構成。The gap adjustment device 50 is shown in Figure 4, and it is also possible to set the suction box 20 with the main frame belt 30M attached to the hollow part of the suction roller 10 on the cross section of the suction roller 10, and calculate the main The various gaps δ formed by, for example, the top 31P of the arc-shaped surface 31 of the frame belt 30M with the inner peripheral surface of the suction roller 10, and the aforementioned gaps G corresponding to the gaps G will correspond to each of these gaps G The scale 54 is previously engraved on the side surface 33A of the main frame band 30M corresponding to the upper end surface 23A of the mounting recess 23 of the suction box 20 and is configured.

在將吸引箱20及主框帶30M***至吸輥10的內空部之前段階，選定設在主框帶30M的側面33A之任一個間隙G的刻度54，使該刻度54與吸引箱20之安裝用凹部23的上端面23A相對向，再藉由螺栓55，將該主框帶30M固定於吸引箱20，藉此，能以該選定的刻度54之間隙G，設定在已被***於吸輥10的內空部的狀態下之主框帶30M對吸輥10的內周面所形成的間隙G。Before inserting the suction box 20 and the main frame tape 30M into the hollow portion of the suction roller 10, select the scale 54 provided at any gap G on the side surface 33A of the main frame tape 30M so that the scale 54 and the suction box 20 The upper end surface 23A of the mounting recess 23 faces each other, and the main frame band 30M is fixed to the suction box 20 by bolts 55, whereby the gap G of the selected scale 54 can be set in the suction box. The gap G formed between the main frame belt 30M and the inner peripheral surface of the suction roller 10 in the state of the hollow portion of the roller 10.

再者，以上的間隙G係越小，則越可維持負壓室21的負壓。但，若間隙G過窄，則會有因吸輥10的旋轉部之振動、圓筒刻度及零件加工誤差等的關係，造成吸輥10與框帶30部分地接觸之虞。吸輥10的旋轉部之振動會因應單元10A的尺寸、旋轉數等改變，因此，需要尋找採用可使吸輥10與框帶30變得完全非接觸且能夠維持吸引箱21的負壓之間隙G。若依據本案發明者的發現，間隙G的理想值為大於0mm且5mm以下，更理想為大於0mm且1mm以下。Furthermore, the smaller the above gap G is, the more the negative pressure of the negative pressure chamber 21 can be maintained. However, if the gap G is too narrow, there is a possibility that the suction roller 10 and the frame belt 30 may partially contact due to the vibration of the rotating part of the suction roller 10, the cylinder scale, and the part processing error. The vibration of the rotating part of the suction roller 10 will change according to the size and number of rotations of the unit 10A. Therefore, it is necessary to find a gap that can make the suction roller 10 and the frame belt 30 completely non-contact and can maintain the negative pressure of the suction box 21 G. According to the findings of the present inventors, the ideal value of the gap G is greater than 0 mm and 5 mm or less, and more preferably greater than 0 mm and 1 mm or less.

又，形成於吸輥10的內周面與主框帶30M的圓弧狀表面31之間的間隙G，不限於對吸輥10的旋轉方向N作成均等，亦可為了增加該間隙G之壓力損失的目的，對吸輥10的旋轉方向N漸減(或漸增)而對流通於該間隙G之密封用流體施加節流抵抗等。In addition, the gap G formed between the inner peripheral surface of the suction roller 10 and the arc-shaped surface 31 of the main frame belt 30M is not limited to being equal to the rotation direction N of the suction roller 10, and may be used to increase the pressure of the gap G The purpose of the loss is to gradually decrease (or increase) the rotation direction N of the suction roller 10 and to impose throttling resistance and the like on the sealing fluid flowing in the gap G.

因此，若依據本實施形態，可達到以下的作用效果。Therefore, according to this embodiment, the following effects can be achieved.

(a)藉由在吸輥10的內周面與主框帶30M之間形成間隙G，藉由對此間隙G供給密封用流體，將該間隙G進行液封，使得既可使設在吸引箱20之主框帶30M對吸輥10的內周面非接觸，亦可維持區劃於該吸引箱的內部之負壓室21的負壓。(a) A gap G is formed between the inner peripheral surface of the suction roller 10 and the main frame belt 30M, and the gap G is supplied with a sealing fluid, and the gap G is liquid-sealed so that it can be installed in the suction The main frame belt 30M of the box 20 has no contact with the inner peripheral surface of the suction roller 10, and can also maintain the negative pressure of the negative pressure chamber 21 partitioned inside the suction box.

藉此，因主框帶30M滑接於吸輥10的內周面所引起之摩擦消失，可無限減低因主框帶30M的磨耗所引起之更換頻率，亦可減低吸輥10的驅動能。As a result, the friction caused by the sliding of the main frame belt 30M on the inner peripheral surface of the suction roller 10 disappears, and the replacement frequency caused by the abrasion of the main frame belt 30M can be infinitely reduced, and the driving energy of the suction roller 10 can also be reduced.

不需要對主框帶30M的滑動部供給潤滑用噴灑水，也不需要採用低摩擦係數的碳樹脂等作為主框帶30M的材料，能夠減低成本。There is no need to supply spray water for lubrication to the sliding part of the main frame belt 30M, and it is also unnecessary to use carbon resin with a low friction coefficient as the material of the main frame belt 30M, which can reduce the cost.

(b)藉由作成為可調整前述(a)的間隙G的大小，可因應吸輥10的內徑及旋轉數、負壓室21所需要的負壓、連接於負壓室21的真空泵浦的流量等之操作條件，形成適當的間隙G。(b) By making it possible to adjust the size of the gap G in (a) above, the vacuum pump connected to the negative pressure chamber 21 can be adapted to the inner diameter and the number of rotations of the suction roller 10, the negative pressure required by the negative pressure chamber 21 The operating conditions such as the flow rate, etc. form an appropriate gap G.

(c)供給至前述(a)的間隙G之密封用流體從配設於吸引箱20的內部且沿著吸輥10的中心軸形成為連續之狹縫狀的流體供給路徑41被供給。因此，可對形成於吸輥10的內周面與主框帶30M之間的間隙G的全區域，確實地供給密封用流體。(c) The sealing fluid supplied to the gap G of (a) is supplied from a fluid supply path 41 arranged in the suction box 20 and formed in a continuous slit shape along the central axis of the suction roller 10. Therefore, the sealing fluid can be reliably supplied to the entire area of the gap G formed between the inner peripheral surface of the suction roller 10 and the main frame band 30M.

(d)從流體供給路徑41朝向吸輥10的內周面之流體的流出方向K對該吸輥10的吸引孔11作成為非平行。因此，能夠迴避自流體供給路徑41流出的流體貫通吸輥10的吸引孔11而飛散到處於該吸輥的外周面之濕紙1的壞影響產生。(d) The outflow direction K of the fluid from the fluid supply path 41 toward the inner peripheral surface of the suction roller 10 is made non-parallel to the suction hole 11 of the suction roller 10. Therefore, it is possible to avoid the bad influence of the fluid flowing out of the fluid supply path 41 passing through the suction hole 11 of the suction roller 10 and scattering to the wet paper 1 on the outer peripheral surface of the suction roller.

再者，在吸引箱20，如圖2所示，於與吸輥10的內周面相對向的位置，設有對吸輥10的吸引孔11噴射清潔用噴灑水之噴灑器24。Furthermore, as shown in FIG. 2, the suction box 20 is provided with a sprayer 24 for spraying cleaning spray water to the suction hole 11 of the suction roller 10 at a position facing the inner peripheral surface of the suction roller 10.

以上，參照圖式詳細說明了關於本發明的實施形態，但本發明的具體的結構不限於此實施例，不超出本發明的技術思想範圍之設計變更等亦包含於本發明。例如，即使在設於吸引箱20之端框帶30E，亦可與主框帶30M同樣地，調整該端框帶30E的圓弧狀表面對吸輥10的內周面所形成之間隙G。 [產業上的利用可能性]Above, the embodiments of the present invention have been described in detail with reference to the drawings, but the specific structure of the present invention is not limited to this embodiment, and design changes that do not exceed the scope of the technical idea of the present invention are also included in the present invention. For example, even in the end frame belt 30E provided in the suction box 20, the gap G formed by the arcuate surface of the end frame belt 30E and the inner peripheral surface of the suction roller 10 can be adjusted similarly to the main frame belt 30M. [Industrial Utilization Possibility]

若依據本發明，既可使設在吸引箱之框帶(deckle strap)對吸輥的內周面非接觸，亦可維持區劃於該吸引箱的內部之負壓室的負壓。According to the present invention, it is possible not only to prevent the deckle strap provided in the suction box from contacting the inner peripheral surface of the suction roller, but also to maintain the negative pressure of the negative pressure chamber partitioned inside the suction box.

1:濕紙 10:吸輥 11:吸引孔 20:吸引箱 21:負壓室 30,30M,30E:框帶 31:圓弧狀表面 40:液封裝置 41:流體供給路徑 50:間隙調整裝置 G:間隙1: wet paper 10: Suction roller 11: Attraction hole 20: Attraction box 21: negative pressure room 30, 30M, 30E: frame belt 31: Arc-shaped surface 40: Liquid sealing device 41: fluid supply path 50: Gap adjustment device G: gap

[圖1]係顯示配置於吸輥的內空部的吸引箱，其中，(A)為顯示安裝於吸引箱的流體配管之立體圖，(B)為取下吸引箱的端構件而加以顯示之立體圖。 [圖2]係顯示吸輥及吸引箱之斷面圖。 [圖3]係顯示間隙調整裝置的一例之斷面圖。 [圖4]係顯示間隙調整裝置的其他例之斷面圖。 [圖5]係顯示吸輥及吸引箱的變形例之斷面圖。[Figure 1] shows the suction box arranged in the hollow part of the suction roller, in which (A) is a perspective view showing the fluid piping installed in the suction box, and (B) is shown by removing the end member of the suction box Stereograph. [Figure 2] is a cross-sectional view showing the suction roller and the suction box. [Fig. 3] is a cross-sectional view showing an example of the gap adjusting device. [Fig. 4] is a cross-sectional view showing another example of the gap adjusting device. [Figure 5] is a cross-sectional view showing a modification of the suction roller and the suction box.

1:濕紙1: wet paper

2:象輥2: Elephant Roll

10:吸輥10: Suction roller

10A:單元10A: unit

20:吸引箱20: Attraction box

21:負壓室21: negative pressure room

30,30M,30E:框帶30, 30M, 30E: frame belt

30Mi:入口側的主框帶30Mi: Main frame belt on the entrance side

30Mo:出口側的主框帶30Mo: Main frame belt on the exit side

31:圓弧狀表面31: Arc-shaped surface

34:蓋34: cover

35:螺栓35: Bolt

40:液封裝置40: Liquid sealing device

41:流體供給路徑41: fluid supply path

42:供水管42: water supply pipe

G:間隙G: gap

N:旋轉方向N: Rotation direction

Claims (5)

一種吸輥之密封方法，係在吸輥的內空部配置吸引箱，使設在吸引箱的框帶與吸輥的內周面相對向而在該吸引箱的內部區劃負壓室，將吸引箱的負壓室維持於負壓，藉此，使在吸輥的外周面被搬運的濕紙的水分通過該吸輥的吸引孔而經由吸引箱之負壓室，進行脫水的吸輥之密封方法，其特徵為： 在吸輥的內周面與框帶之間形成間隙，藉由對此間隙供給密封用流體，將該間隙進行液封。A method for sealing suction rollers. The suction box is arranged in the hollow part of the suction roller. The frame belt provided in the suction box is opposed to the inner peripheral surface of the suction roller. A negative pressure chamber is partitioned inside the suction box. The negative pressure chamber of the box is maintained at negative pressure, whereby the moisture of the wet paper conveyed on the outer peripheral surface of the suction roller passes through the suction hole of the suction roller and passes through the negative pressure chamber of the suction box to seal the suction roller for dehydration. The method is characterized by: A gap is formed between the inner peripheral surface of the suction roller and the frame belt, and the gap is liquid-sealed by supplying a sealing fluid to the gap. 如請求項1所述之吸輥之密封方法，其中，可調整形成於前述吸輥的內周面與框帶之間的間隙之大小。The method for sealing a suction roller according to claim 1, wherein the size of the gap formed between the inner peripheral surface of the suction roller and the frame belt can be adjusted. 一種吸輥之密封裝置，係在吸輥的內空部配置吸引箱，使設在吸引箱的框帶與吸輥的內周面相對向而在該吸引箱的內部區劃負壓室，將吸引箱的負壓室維持於負壓，藉此，使在吸輥的外周面被搬運的濕紙的水分通過該吸輥的吸引孔而經由吸引箱之負壓室，進行脫水的吸輥之密封裝置，其特徵為： 在吸輥的內周面與框帶之間形成間隙，並具有對前述間隙供給密封用流體而將該間隙進行液封之液封裝置。A kind of sealing device for suction roller. A suction box is arranged in the hollow part of the suction roller, so that the frame belt provided in the suction box and the inner peripheral surface of the suction roller are opposed to each other. The negative pressure chamber of the box is maintained at negative pressure, whereby the moisture of the wet paper conveyed on the outer peripheral surface of the suction roller passes through the suction hole of the suction roller and passes through the negative pressure chamber of the suction box to seal the suction roller for dehydration. The device is characterized by: A gap is formed between the inner peripheral surface of the suction roller and the frame belt, and a liquid sealing device is provided for supplying a sealing fluid to the gap and liquid sealing the gap. 如請求項3所述之吸輥之密封裝置，其中，具有可調整形成於前述吸輥的內周面與框帶之間的間隙之大小的間隙調整裝置。The sealing device of the suction roller according to claim 3, which has a gap adjusting device capable of adjusting the size of the gap formed between the inner peripheral surface of the suction roller and the frame belt. 如請求項3或4所述之吸輥之密封裝置，其中，前述液封裝置係具有流體供給路徑，該流體供給路徑係配設於框帶的內部，開口於沿著吸輥的內周面之該框帶的圓弧狀表面，並呈沿著吸輥的中心軸形成連續的狹縫狀，從該流體供給路徑朝向吸輥的內周面之流體的流出方向係對該吸輥的吸引孔呈非平行。The sealing device for a suction roller according to claim 3 or 4, wherein the liquid sealing device has a fluid supply path, the fluid supply path is arranged inside the frame belt and opens along the inner peripheral surface of the suction roller The arc-shaped surface of the frame is in the shape of a continuous slit along the central axis of the suction roller, and the outflow direction of the fluid from the fluid supply path toward the inner peripheral surface of the suction roller is the suction of the suction roller The holes are non-parallel.
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