JP3957573B2 - Air-driven transfer equipment - Google Patents

Description

で表される。ここで、ｒ：空気比重量、ｇ：重力加速度、k:係数である。
したがって、シール板の数：ｎを多くすると、漏れ率：φが小さくなり、小さい風量で走行駆動することができる。
【００３２】
上記実施の形態において、搬送台車５を搬送経路の一端から他端側に実線矢印方向に移動させる場合、駆動エアユニット４の弁５１，５４，６０を開、弁５６,５８を閉に操作して、駆動ファン５３から加圧エアをエア駆動ダクト１の一端側に供給し、エア駆動ダクト１内の走行体２の前後の差圧により、シール板２３Ｆ，２３Ｒを介して走行体２が走行駆動される。なお、エア駆動ダクト１の他端に駆動エアユニット４が設けられる場合には、走行体２の前方の駆動エアユニット４内を吸引して負圧とすることで、走行体２の前後の圧力差を大きくして走行駆動力を大きくし、高速で搬送駆動することができる。エア駆動ダクト１の中間部に駆動エアユニット４を接続した場合には、走行体２の通過を検出して加圧と減圧とを切り替えればよい。
【００３３】
走行体２では、エア駆動ダクト１内における後方のエア圧力を２枚のシール板２３Ｆ，２３Ｒでそれぞれ受けて前方に走行し、駆動力を連結部材８を介して搬送台車５に伝達し、搬送台車５が搬送レール６に沿って走行駆動される。
【００３４】
この走行体２の走行時には、連結部材６がシール装置９の内リップシール４２と外リップシール４２とに挟まれた状態で、エア駆動ダクト１のスリット７がシールされている。特に、走行体２の後方で正圧となるエア駆動ダクト１では、エア圧が左右の内リップシール４２を互いに押付ける方向に働くため、スリット７が良好にシールされてエア圧が走行体の駆動圧として効率良く働くことになる。
【００３５】
またここで、エア駆動ダクト１の他端に設けられた駆動エアユニット４により、走行体２の前方のエア駆動ダクト１を負圧とした場合には、大気側のエア圧により外リップシール４４を互いに押付ける方向に働くため、スリット７が良好にシールされて負圧が走行体２の駆動圧として効率良く働くことになる。
【００３６】
さらにスリット７内では、走行中に連結部材８の前後で左右の内リップシール４２および外リップシール４４に僅かな隙間が発生するが、中間ガイド体３２によりこの隙間からの漏風が効果的に防止される。
【００３７】
搬送台車５を他端側から一端側に戻す場合には、駆動エアユニット４の弁５１，５６，５８を開、弁５４，６０を閉に、駆動ファン５によりエア駆動ダクト１のエアを吸気して走行体２の前方を負圧とすることにより、駆動エアユニット４内の走行体２前後の差圧によりシール板２３Ｆ，２３Ｒを介して走行体２が走行駆動される。
【００３８】
この時、エア駆動ダクト１内が負圧となる走行体２の前方のシール装置９では、大気側のエア圧が外リップシール４４を互いに押付ける方向に働き、スリット７が良好にシールされて走行体２を効率良く走行駆動される。
【００３９】
上記実施の形態によれば、エア駆動ダクト１のスリット７に設けたシール装置９に、内リップシール４２を設けたので、エア駆動ダクト１内の正圧が左右の内リップシール４２を互いに押付ける方向に働くことで、スリット７を効果的にシールすることができる。このように、エア駆動ダクト１の両端にそれぞれ加圧エアを供給するエアポンプを設けたエア駆動搬送設備では、内リップシール４２により、走行体２の後方の正圧を効果的にシールして走行体２を効率良く往復移動させることができる。
【００４０】
また外リップシール４４により、エア駆動ダクト１内を負圧とした時に、大気圧が左右の外リップシール４４を互いに押付ける方向に働き、スリット７を効果的にシールすることができる。したがって、エア駆動ダクト１の両端にそれぞれ減圧可能な駆動エアユニット４を設けたエア駆動搬送設備では、外リップシール４４により、走行体２の前方の負圧を効果的にシールして走行体２を効率良く往復移動させることができる。
【００４１】
さらに、シール装置に内リップシール４２と外リップシール４４とを設けることにより、エア駆動ダクト１の一端部に、加圧および減圧可能な駆動エアユニット４を設けるだけで、エア駆動ダクト１の加圧部分および減圧部分ともスリット７を効果的にシールすることができて、走行体２を効率良く往復移動させることができる。もちろん、エア駆動ダクト１の両端に、加圧および減圧可能な駆動エアユニット４を設けることで、走行体２の前後の差圧を大きくして、さらに効率良くかつ大きい駆動力で走行体２を往復移動させることができる。
【００４２】
さらにまた連結部材８に、内リップシール４２と外リップシール４４の間の空間部４５を移動する中間ガイド体３２を設け、この中間ガイド体を先尖り上で前後にそれぞれ突出して、内リップシール４２と外リップシール４４の基端部にそれぞれ摺接するように構成したので、連結部材８の前後にできる隙間からの漏風を効果的に防止することができる。
【００４３】
また走行体２の前後にそれぞれシール板２３Ｆ，２３Ｒを設けたので、エア駆動ダクト壱内における漏風を効果的に防止して、高い効率で走行体２を走行駆動することができる。また角筒状に形成されたエア駆動ダクト１の内面にそれぞれ転動する走行ローラ２４Ｆ，２４Ｒ，２５Ｆ，２５Ｒと振れ止めローラ２６Ｆ，２６Ｒ，２７Ｆ，２７Ｒを設けたので、走行体２の軸心のずれや回転を最小限に抑制して安定した姿勢で走行移動させることができる。したがって、スリット７やシール装置９に対する連結部材８の移動位置を安定させることができ、シール装置９によるシール効果を向上させることができる。
【００４４】
【発明の効果】
維持用に述べたごとく請求項１記載の構成によれば、エア駆動ダクト内の押込み駆動用エアの正圧により、互いに押付けられる一対の内リップシールと、吸込み駆動用エアの負圧時の大気圧で互いに押付けられる一対の外リップシールとを設けたので、押込み駆動時において受圧部材の後方に発生する正圧と、吸込み駆動時に受圧部材の前方に発生する負圧とを、それぞれ良好にシールしてスリットからの漏風またはエアの流入を防止し、受圧部材前後の差圧を拡大して効率よく受圧部材を駆動することができる。また中間ガイド体により、連結部材の前方および後方に一対の内リップシール間と一対の外リップシール間とにそれぞれ生じる隙間からの漏風を防止して効果的にシールすることができる。
【００４７】
請求項２記載の発明によれば、連結部材の摺接面を厚みが薄い湾曲面とすることで、リップシールとの摩擦抵抗を軽減してシール効果を向上させることができる。
【００４８】
請求項３記載の発明によれば、角筒内を走行する走行体により、エア駆動ダクト内を移動する受圧部材と、スリット内を移動する連結部材とを一定位置に保持することができ、エア駆動ダクト内およびスリット内をそれぞれ安定して移動させて、漏風を防止し、効率良く駆動することができる。
【００４９】
請求項４記載の発明によれば、エア駆動ダクトの一端側から加圧による押込み駆動と減圧による吸込み駆動とを行って搬送体を往復駆動することができ、エア駆動ダクトの端部にエア駆動ユニットを設置する空間がないような条件下であっても、エア駆動搬送設備を容易に設置することができる。
【図面の簡単な説明】
【図１】本発明に係るエア駆動搬送設備の実施の形態を示す全体構成図である。
【図２】同エア駆動搬送設備の走行体と搬送台車を示す側面断面図である。
【図３】同走行体と搬送台車を示す横断面図である。
【図４】同走行体を示す平面図である。
【図５】同走行体を示す側面図である。
【図６】同走行体およびシール装置を示す側面図である。
【図７】同走行体およびシール装置を示す中央横断面図である。
【図８】同シール装置のリップシールを示す拡大横断面図である。
【図９】（ａ）（ｂ）はそれぞれ同シール装置のリップシールの作用効果を示し、（ａ）はエア駆動ダクト内の正圧状態の拡大横断面図、（ｂ）はエア駆動ダクト内の負圧状態の拡大横断面図である。
【図１０】従来のエア駆動ダクトのシール装置を示す部分横断面図である。
【符号の説明】
Ｌ 搬送経路
１ エア駆動ダクト
２ 走行体
３ 受圧部材
４ 駆動エアユニット
５ 搬送台車
６ 搬送レール
７ スリット
８ 連結部材
９ シール装置
１４Ｆ，１４Ｒ 走行車輪
１５Ｆ，１５Ｒ 振れ止め車輪
２１ 機体
２３Ｆ，２３Ｒ シール板
２４Ｆ，２４Ｒ 上走行ローラ
２５Ｆ，２５Ｒ 下走行ローラ
２６Ｆ，２６Ｒ 左振れ止めローラ
２７Ｆ，２７Ｒ 右振れ止めローラ
３１ 摺接面
３２ 中間ガイド体
４２ 内リップシール
４３ スペーサ
４４ 外リップシール
４５ 空間部
５３ 駆動ファン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air-driven transfer facility that protrudes a connecting member through a slit from a pressure receiving member that is movably disposed in an air-driven duct, and drives the transfer body through the connecting member.
[0002]
[Prior art]
Conventionally, a pressure receiving member or a traveling body having a pressure receiving member is arranged in an air driving duct, and the pressure receiving member and the traveling body are moved using an air pressure difference before and after the pressure receiving member in the air driving duct. As a transport facility in which the connecting member is protruded through the formed slit and the transport member and the laying member are held by the connecting member, air leaking from the slit is particularly problematic. For example, in Japanese Patent No. 3046356, as shown in FIG. 10, a cylindrical seal engaged with a slit 82 formed in a circular air drive duct 81 along the axial direction through a locking portion 80a. A wire rod 80 disposed along the inner surface of a slit 82 is disclosed.
[0003]
[Problems to be solved by the invention]
However, in the conventional configuration, {circle over (1)}. When the pressure in the air drive duct 81 is larger than the atmospheric pressure outside the duct, the sealing wire 80 is pressed against the slit 82, so that air leakage from the slit 82 can be prevented. When the pressure is smaller than the atmospheric pressure outside the duct, there is no sealing function. The driving force obtained through the pressure receiving seal plate 84 by the air drive duct is determined by the pressure difference before and after the pressure receiving seal plate 84. The inside of the air drive duct 81 in the front in the transport direction cannot be made negative, and a large driving force cannot be obtained. b. When reciprocating in the air drive duct 81, a pressurized air supply device is required on both ends of the air drive duct 81, which increases costs. (2). A connecting member (not shown) that moves along the slit 82 moves while deforming the sealing wire 80, and the return to the original shape depends only on the resilience due to the elasticity of the locking portion 80a and the sealing wire 80. In other words, if the frequency of use is high, the recoverability may be reduced and air leakage may occur, resulting in low reliability and a short life. (3). Since the locking portion 80a is inserted into the slit 82, there is a risk of wear due to contact with the connecting member, and the lifetime is short. (4). Since the sealing wire 80 protrudes into the air drive duct 81, a contact avoidance groove 84a is required in the pressure receiving seal plate 84. However, this groove 84a causes air leakage and has a problem of poor efficiency. .
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a transport device that can reliably prevent air leakage from a slit, has a long life, and can be transported efficiently.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a connecting member is provided from a pressure receiving member arranged movably in an air drive duct through a slit formed in the air drive duct along the length direction. In an air-driven transfer facility that protrudes and drives a transfer body connected to the connecting member, a seal device that seals the slit is provided in the air drive duct along the slit so that the air is directed from the left and right sides of the slit toward the center. A pair of left and right inner lip seals made of an elastic material that are curved inward of the drive duct and abut against each other and allow the connecting member to pass therethrough, and are provided along the slits on the outside of the inner lip seal of the air drive duct. A pair of left and right outer parts made of an elastic material that curves from the left and right sides toward the center and to the outside of the air drive duct and abuts each other to allow the passage of the connecting member. And an intermediate guide body that is provided on the connecting member so as to protrude forward and rearward in the moving direction and moves in a space between the inner lip seal and the outer lip seal. The inner lip seals are pressed against each other for sealing, and the outer lip seals are attracted to each other for sealing by the negative pressure in the air drive duct, and further, air leakage from the gap between the inner lip seal and the outer lip seal is caused by the intermediate guide body. It is comprised so that it may prevent .
[0006]
According to the configuration of the first aspect, the pair of inner lip seals pressed against each other by the positive pressure of the pushing drive air in the air drive duct and the pair pushed against each other at the atmospheric pressure when the suction drive air is negative. Since the outer lip seal is provided, the positive pressure generated at the rear of the pressure receiving member during the pushing drive and the negative pressure generated at the front of the pressure receiving member during the suction driving are sealed well to leak air from the slit. Alternatively, the inflow of air can be prevented and the pressure receiving member can be efficiently driven by increasing the differential pressure before and after the pressure receiving member. Further, the intermediate guide body can effectively seal air by preventing air leakage from the gap between the pair of inner lip seals and the pair of outer lip seals in front and rear of the connecting member.
[0011]
According to a second aspect of the present invention, in the configuration according to the first aspect, the connecting member is formed in a curved surface having a thin sliding surface to the inner lip seal and the outer lip seal, and the friction of the sliding surface. resistance and is formed smaller.
[0012]
According to the said structure, the frictional resistance with a lip seal can be reduced and the sealing effect can be improved by making the sliding contact surface of a connection member into a curved surface with thin thickness .
[0013]
According to a third aspect of the present invention, in the configuration of the first or second aspect, the air drive duct is formed in a rectangular tube shape, and is movable in the air drive duct via a plurality of wheels that roll on the inner surface. A travel body is provided, a pressure receiving member is provided on the travel body, a transport carriage guided by a guide member disposed along the transport direction is provided outside the air drive duct, and the transport carriage is attached to the travel body. The distal end portion of the connecting member is connected to the transport carriage.
[0014]
According to the above configuration, the traveling body that travels in the rectangular tube can hold the pressure receiving member that moves in the air driving duct and the connecting member that moves in the slit in a fixed position, and the air driving duct and Each of the slits can be moved stably to prevent air leakage and drive efficiently.
[0015]
According to a fourth aspect of the present invention, in the structure according to any one of the first to third aspects, the pressure receiving member is configured to be in a positive pressure state by supplying driving air to the air driving duct to at least one end of the air driving duct. And a driving air unit that sucks and drives the pressure receiving member by sucking the air driving duct to bring it into a negative pressure state.
[0016]
According to the above configuration, the conveying body can be driven to reciprocate by performing pushing driving by pressurization and suction driving by decompression from one end side of the air driving duct, and the air driving unit is installed at the end of the air driving duct. Even under conditions where there is no space, it is possible to easily install an air-driven transfer facility.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Here, an embodiment of an air-driven transfer facility according to the present invention will be described with reference to FIGS.
[0018]
As shown in FIG. 1, this air-driven transport facility includes an air drive duct 1 disposed along a transport path L, and a seal plate (pressure receiving member) 3 that is movably disposed in the air drive duct 1. The air driving duct 1 is connected to at least one of the traveling body 2 having the air driving duct 1 and the conveying direction of the traveling body 2 to pressurize the air driving duct 1 (positive pressure: a pressure larger than atmospheric pressure) or depressurize (negative pressure). Drive air unit 4 that is less than atmospheric pressure), a transport carriage 5 that is movably disposed outside the air drive duct 1 via a transport rail 6, and the air drive duct 1 in the transport direction. A connecting member 8 that protrudes from the traveling body 2 through the formed slit 7 and is connected to the transport carriage 5, and a sealing device 9 that is provided in the slit 7 and seals a gap between the slit 7 and the connecting member 8. And There.
[0019]
As shown in FIGS. 2 and 3, the air drive duct 1 is provided with notched connecting flanges 12 on both sides of a square section duct body 11 having a predetermined length, and the flanges 12 are connected to each other via a seal packing. The conveying path L having a predetermined length is formed by being mounted and connected by a connecting tool such as a bolt. A slit 7 is formed over the entire length at the center of the upper surface of the air drive duct 1. Further, stoppers 13 for restricting the transport carriage 5 are provided at both ends of the air drive duct 1.
[0020]
A pair of left and right groove-shaped conveyance rails 6 (shown in the horizontal H-shaped cross section) are laid along both sides of the air drive duct 1, and the carriage wheel 5 rolls on the bottom surface of the conveyance rail 6. 14F and 14R and steadying wheels 15F and 15R that roll on the inner surface of the transport rail 6 are provided at four corner positions, respectively.
[0021]
As shown in FIGS. 4 and 5, the traveling body 2 has face plates 22F and 22R attached to the front and rear of the airframe 21 having a rectangular tube cross section, and seals attached to the outer peripheral portions on the inner surfaces of the face plates 22F and 22R. A pair of left and right front upper traveling rollers (wheels) 24F and a front lower portion, which are provided at the front portion of the plate 3 and the face plate 22F of the airframe 21 and roll on the top and bottom surfaces in the air drive duct 1 respectively on the left and right sides. Traveling rollers (wheels) 25F, front left and right steadying rollers (wheels) 26F and 27F, and rear surfaces of the face plate 22R of the fuselage 21 are rolled on the top, bottom and left and right sides of the air drive duct 1, respectively. A pair of left and right upper rear traveling rollers (wheels) 24R, lower rear front traveling rollers (wheels) 25R, rear left and right steadying rollers (wheels) 26R and 27R, and a front end portion and a rear end portion of the airframe 21 are provided. Stop plate 28R, is provided and the 28L, leakage of air is reduced by the sealing plates 3 of two front and rear.
[0022]
A connecting member 8 that protrudes through the slit 7 is erected at the center of the upper surface of the body 21. This connecting member 8 is formed in a curved sliding contact surface 31L, 31R in which the left and right side surfaces are arcuate surfaces along the conveying direction, and an assembly of, for example, tetrafluoroethylene is formed on the sliding contact surfaces 31L, 31R. A material with low frictional resistance is coated. Further, an intermediate guide body 32 that protrudes from the connecting member 8 in the front-rear direction along the transport direction by a predetermined amount is attached to an intermediate position of the connecting member 8. And the front-end | tip flange part 33 attached to the upper end part of a connection member is connected with the connection material 34 of the conveyance trolley 5 bottom part.
[0023]
As shown in FIGS. 6 to 8, the seal device 9 has a pair of left and right guide strips 41 mounted on the top plate of the air drive duct 1 along the slit 7 on both sides of the slit 7. A pair of left and right inner lip seals 42 that are curved toward the air drive duct 1 side from both sides of the slit 7 toward the center and are in contact with each other are attached. These inner lip seals 42 are made of, for example, an elastic material such as wear-resistant synthetic rubber, and are configured to allow passage of the connecting member 8. A pair of left and right outer lip seals 44 are attached to the inner lip seals 42 through the spacers 43 from the opposite sides of the slit 7 toward the center and are in contact with each other. The lip seal 44 is made of an elastic material such as wear-resistant synthetic rubber, and is configured to allow the connection member 8 to pass therethrough. A space 45 in which the intermediate guide body 32 moves is formed between the inner lip seal 42 and the outer lip seal 44.
[0024]
Therefore, when compressed air is supplied from the drive air unit 4 into the air drive duct 1 and becomes a positive pressure, the inner lip seals 42 are pressed against each other as shown in FIG. The slit 7 can be sealed. On the other hand, when the inside of the air drive duct 1 is sucked by the drive air unit 4 and becomes negative pressure, as shown in FIG. The slits 7 can be sealed by being attracted to each other.
[0025]
Further, when the connecting member 8 passes, the inner and outer lip seals 42 and 44 are slidably contacted with the sliding contact surfaces 31L and 31R of the connecting member 8 due to elasticity. Further, the intermediate guide body 32 having a pointed tip in a plan view and the same thickness as the connecting member has the upper and lower surfaces on the distal end side and the rear end side on the proximal end sides of the inner and outer lip seals 42 and 44, respectively. The lip seals 42 and 44 are pushed and spread by the connecting member 8 to prevent air leakage from the front and rear.
[0026]
As shown in FIG. 1, the drive air unit 4 is disposed, for example, at one end of the air drive duct 1 (a plurality of units are disposed including an intermediate portion when the transport path is long). On the other hand, an open valve (opening / closing air damper) 50 that connects the air drive duct 1 and the atmosphere side is provided on the other end side of the air supply / exhaust pipe 52, but the drive air unit 4 may be provided in the same structure. .
[0027]
In the drive air unit 4, an air supply pipe 61 having an intake opening / closing valve (opening / closing air damper) 60 is connected to an intake port of the drive fan 53, and an air supply flow rate adjusting valve 54 is provided at the air supply port of the drive fan 53. The trachea 55 is connected to an air supply / exhaust pipe 52 that communicates with the air drive duct 1 and that has an internal open / close valve (open / close air damper) 51 interposed therebetween. An intake pipe 57 having an intake air flow rate adjustment valve 56 is connected to the upstream side of the internal opening / closing valve 51 of the supply / exhaust pipe 52, and the intake pipe 57 is connected to the intake port of the drive fan 53 via the air supply pipe 61. It is connected. Further, an air discharge pipe 59 having an exhaust opening / closing valve (opening / closing air damper) 58 is connected to an upstream portion of the air supply flow rate adjusting valve 54 of the air supply pipe 55.
[0028]
Therefore, by operating the valves 51, 54 and 60 to be opened and the valves 56 and 58 to be closed, the traveling body 2 can be pushed and driven with the air in the air drive duct 1 as a positive pressure. , 58 are opened, and the valves 54, 60 are closed, whereby the air in the air drive duct 1 is sucked into the negative pressure to drive the traveling body 2 by suction.
[0029]
Here, the driving of the traveling body 2 is as follows: propulsive force due to differential pressure across the traveling body 2: F, traveling resistance of the traveling body 2: a, sliding resistance between the connecting member 8 and the seal device 9: b, and the transport carriage 5. Assuming that the traveling resistance is c, the traveling driving can be performed with F ≧ (a + b + c).
[0030]
Further, the amount of air necessary for driving the traveling body 2, that is, the wind speed: u, the cross-sectional area of the air drive duct 1: A, the pressure receiving area: Ac, the differential pressure in the air drive duct 1 before and after the conveying direction: ΔPc, If the number of sheets is n and the leakage rate is φ,
[0031]
[Expression 1]

It is represented by Here, r: specific weight of air, g: acceleration of gravity, k: coefficient.
Therefore, when the number of seal plates: n is increased, the leakage rate: φ is reduced, and traveling can be performed with a small air volume.
[0032]
In the above embodiment, when the transport carriage 5 is moved from one end of the transport path to the other end in the direction of the solid arrow, the valves 51, 54, 60 of the drive air unit 4 are opened and the valves 56, 58 are closed. Then, pressurized air is supplied from the driving fan 53 to one end side of the air driving duct 1, and the traveling body 2 travels through the seal plates 23F and 23R due to the differential pressure across the traveling body 2 in the air driving duct 1. Driven. In the case where the driving air unit 4 is provided at the other end of the air driving duct 1, the pressure before and after the traveling body 2 is obtained by sucking the inside of the driving air unit 4 in front of the traveling body 2 to obtain a negative pressure. The driving force can be increased by increasing the difference, and can be driven at high speed. When the driving air unit 4 is connected to the intermediate portion of the air driving duct 1, it is only necessary to detect the passage of the traveling body 2 and switch between pressurization and decompression.
[0033]
In the traveling body 2, the rear air pressure in the air drive duct 1 is received by the two seal plates 23 F and 23 R, respectively, and travels forward, and the driving force is transmitted to the transport carriage 5 via the connecting member 8. The carriage 5 is driven to travel along the transport rail 6.
[0034]
When the traveling body 2 travels, the slit 7 of the air drive duct 1 is sealed with the connecting member 6 sandwiched between the inner lip seal 42 and the outer lip seal 42 of the sealing device 9. In particular, in the air drive duct 1 that has a positive pressure behind the traveling body 2, the air pressure works in a direction to press the left and right inner lip seals 42 against each other, so that the slit 7 is well sealed and the air pressure is applied to the traveling body. It will work efficiently as a driving pressure.
[0035]
Here, when the air drive duct 1 provided at the other end of the air drive duct 1 has a negative pressure in the air drive duct 1 in front of the traveling body 2, the outer lip seal 44 is caused by the air pressure on the atmosphere side. Since the slits 7 are sealed well, the negative pressure works efficiently as the driving pressure of the traveling body 2.
[0036]
Further, in the slit 7, a slight gap is generated between the left and right inner lip seals 42 and the outer lip seal 44 before and after the connecting member 8 during traveling, but the intermediate guide body 32 effectively prevents air leakage from the gap. Is done.
[0037]
When the transport carriage 5 is returned from the other end side to the one end side, the valves 51, 56, 58 of the drive air unit 4 are opened, the valves 54, 60 are closed, and the air from the air drive duct 1 is sucked by the drive fan 5. By setting the front of the traveling body 2 to a negative pressure, the traveling body 2 is driven to travel through the seal plates 23F and 23R by the differential pressure across the traveling body 2 in the drive air unit 4.
[0038]
At this time, in the sealing device 9 in front of the traveling body 2 in which the air drive duct 1 has a negative pressure, the air pressure on the atmosphere side works in the direction of pressing the outer lip seals 44, and the slit 7 is well sealed. The traveling body 2 is driven to travel efficiently.
[0039]
According to the above embodiment, since the inner lip seal 42 is provided in the sealing device 9 provided in the slit 7 of the air drive duct 1, the positive pressure in the air drive duct 1 pushes the left and right inner lip seals 42 against each other. By working in the attaching direction, the slit 7 can be effectively sealed. As described above, in the air drive conveyance facility provided with the air pumps for supplying the pressurized air to both ends of the air drive duct 1, the inner lip seal 42 effectively seals the positive pressure behind the traveling body 2 and travels. The body 2 can be reciprocated efficiently.
[0040]
Further, when the pressure inside the air drive duct 1 is set to a negative pressure by the outer lip seal 44, the atmospheric pressure works in a direction to press the left and right outer lip seals 44 against each other, and the slit 7 can be effectively sealed. Therefore, in the air drive conveyance equipment provided with the drive air units 4 that can be depressurized at both ends of the air drive duct 1, the outer lip seal 44 effectively seals the negative pressure in front of the travel body 2 and the travel body 2. Can be reciprocated efficiently.
[0041]
Further, by providing the inner lip seal 42 and the outer lip seal 44 in the sealing device, the air drive duct 1 can be added only by providing the drive air unit 4 that can be pressurized and depressurized at one end of the air drive duct 1. The slit 7 can be effectively sealed in both the pressure part and the pressure reduction part, and the traveling body 2 can be efficiently reciprocated. Of course, by providing the drive air units 4 that can be pressurized and depressurized at both ends of the air drive duct 1, the differential pressure before and after the travel body 2 is increased, and the travel body 2 is more efficiently and with a large driving force. It can be reciprocated.
[0042]
Furthermore, the connecting member 8 is provided with an intermediate guide body 32 that moves in the space 45 between the inner lip seal 42 and the outer lip seal 44, and the intermediate guide body protrudes forward and backward on the pointed tip to thereby provide an inner lip seal. 42 and the base end portion of the outer lip seal 44 are configured to be slidably contacted with each other, so that air leakage from the gap formed before and after the connecting member 8 can be effectively prevented.
[0043]
Further, since the seal plates 23F and 23R are respectively provided before and after the traveling body 2, it is possible to effectively prevent air leakage in the air drive duct and to drive the traveling body 2 with high efficiency. Further, since the running rollers 24F, 24R, 25F, and 25R and the anti-sway rollers 26F, 26R, 27F, and 27R are provided on the inner surface of the air drive duct 1 that is formed in a rectangular tube shape, the axis of the traveling body 2 is provided. It is possible to travel and move in a stable posture with minimal deviation and rotation. Therefore, the movement position of the connecting member 8 with respect to the slit 7 and the sealing device 9 can be stabilized, and the sealing effect by the sealing device 9 can be improved.
[0044]
【The invention's effect】
According to the configuration of the first aspect as described for maintenance, the pair of inner lip seals pressed against each other by the positive pressure of the pushing driving air in the air driving duct and the large amount of the suction driving air at the negative pressure A pair of outer lip seals that are pressed against each other at atmospheric pressure are provided, so that the positive pressure generated behind the pressure receiving member during push-in driving and the negative pressure generated ahead of the pressure receiving member during suction driving are well sealed. Thus, the air leakage from the slit or the inflow of air can be prevented, the differential pressure before and after the pressure receiving member can be enlarged, and the pressure receiving member can be driven efficiently. Further, the intermediate guide body can effectively seal air by preventing air leakage from the gap between the pair of inner lip seals and the pair of outer lip seals in front and rear of the connecting member.
[0047]
According to the invention described in claim 2 , by making the sliding contact surface of the connecting member a curved surface having a small thickness, it is possible to reduce the frictional resistance with the lip seal and improve the sealing effect .
[0048]
According to the third aspect of the present invention, the traveling body to travel in the rectangular tube, can hold the pressure receiving member moving in the air-driven duct, and a connecting member that moves in the slit at a predetermined position, the air It is possible to stably move the inside of the drive duct and the inside of the slit to prevent air leakage and drive efficiently.
[0049]
According to the fourth aspect of the present invention, it is possible to reciprocate the conveyance body by performing pushing driving by pressurization and suction driving by depressurization from one end side of the air driving duct, and air driving is performed at the end of the air driving duct. Even under conditions where there is no space for installing the unit, the air-driven transfer facility can be easily installed.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment of an air-driven transfer facility according to the present invention.
FIG. 2 is a side sectional view showing a traveling body and a transport carriage of the air-driven transport facility.
FIG. 3 is a transverse sectional view showing the traveling body and a transport carriage.
FIG. 4 is a plan view showing the traveling body.
FIG. 5 is a side view showing the traveling body.
FIG. 6 is a side view showing the traveling body and the sealing device.
FIG. 7 is a central cross-sectional view showing the traveling body and the sealing device.
FIG. 8 is an enlarged cross-sectional view showing a lip seal of the sealing device.
FIGS. 9A and 9B show the operational effects of the lip seal of the sealing device, respectively, FIG. 9A is an enlarged cross-sectional view of a positive pressure state in the air drive duct, and FIG. It is an expanded transverse sectional view of the negative pressure state.
FIG. 10 is a partial cross-sectional view showing a conventional air drive duct sealing device.
[Explanation of symbols]
L transport path 1 air drive duct 2 travel body 3 pressure receiving member 4 drive air unit 5 transport carriage 6 transport rail 7 slit 8 connecting member 9 sealing device 14F, 14R travel wheel 15F, 15R steady wheel 21 machine body 23F, 23R seal plate 24F , 24R Upper travel roller 25F, 25R Lower travel roller 26F, 26R Left steady roller 27F, 27R Right steady roller 31 Sliding contact surface 32 Intermediate guide body 42 Inner lip seal 43 Spacer 44 Outer lip seal 45 Space 53 Drive fan

Claims (4)

A connecting member protrudes from a pressure receiving member arranged movably in the air drive duct through a slit formed along the length direction of the air drive duct, and conveys and drives the conveyance body connected to the connection member. In air driven transfer equipment,
The sealing device that seals the slit is
A pair of left and right inner lip seals made of an elastic material that is provided along the slit in the air drive duct and curves toward the inside of the air drive duct from the left and right sides of the slit to the inside of the air drive duct and allows passage of the connecting member When,
An elastic material provided along the slit on the outer side of the inner lip seal of the air drive duct and curved toward the outer side of the air drive duct from the left and right sides of the slit toward the center to allow the connecting member to pass through. A pair of left and right outer lip seals,
An intermediate guide body provided on the connecting member so as to protrude forward and rearward in the moving direction and moving in a space between the inner lip seal and the outer lip seal;
The inner lip seals are pressed against each other by the positive pressure in the air drive duct, and the outer lip seals are attracted to each other by the negative pressure in the air drive duct to seal them. An air-driven conveyance facility configured to prevent air leakage from a gap between outer lip seals . 2. The connecting member according to claim 1 , wherein a sliding contact surface to the inner lip seal and the outer lip seal is formed as a curved surface having a small thickness, and a frictional resistance of the sliding contact surface is formed to be small . Air-driven transfer equipment. The air drive duct is formed in a square tube shape,
In the air drive duct, while providing a traveling body that is movable via wheels that roll on a plurality of inner surfaces, a pressure receiving member is provided on the traveling body,
Provided on the outside of the air drive duct is a transport carriage guided by a guide member arranged along the transport direction and capable of traveling,
The air-driven transfer facility according to claim 1 or 2 , wherein a leading end portion of a connecting member attached to the traveling body is connected to the transfer carriage . At least one end of the air drive duct is supplied with pressurized air for driving to the air drive duct to bring it into a positive pressure state to drive the pressure receiving member, and to suck the air drive duct into a negative pressure state to drive the pressure receiving member by suction. The air drive conveyance equipment according to any one of claims 1 to 3, wherein a drive air unit is provided .

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