A sole air bag pressing mechanism

Abstract

This invention provides a shoe sole airbag pressing mechanism, including a support base, an upper airbag pressing component, and a lower airbag pressing component, which are symmetrically distributed vertically. The upper and lower airbag pressing components are used for airbag pressing of the shoe sole. An auxiliary pressing assembly is provided above the support base, with two symmetrically distributed auxiliary pressing assemblies connected to both sides of the upper and lower airbag pressing components. The auxiliary pressing assemblies control the movement of the upper and lower airbag pressing components towards and away from each other. This invention utilizes the auxiliary pressing assemblies to control the movement of the upper and lower airbag pressing components, and uses an airbag inflation / deflation assembly to ventilate the upper and lower airbag pressing components, allowing them to apply pressure to the shoe sole simultaneously from both sides, preventing uneven force on the shoe sole and resulting in poor pressing effect.

Description

Technical Field

[0001] This utility model relates to the field of footwear processing, and in particular to a sole airbag pressing mechanism. Background Technology

[0002] The sole is the part of the shoe that directly contacts the ground, playing a crucial role in the shoe's function, comfort, and durability. The sole airbag compression mechanism is a piece of equipment used in the footwear industry. It achieves precise compression between the sole and upper by inflating and deflating airbags, improving the production efficiency and quality of footwear products.

[0003] In the process of shoe manufacturing, it is generally necessary to press the sole with an airbag pressing mechanism. In the authorized Chinese utility model patent "Announcement No.: CN206659273U, Name: Sole Pressing Airbag", the sole forming airbag is processed into a cross-section that is narrow at the top and bottom and wide in the middle. It is used in conjunction with a mold and the forming airbag is inflated to apply pressure, so as to complete the processing and shaping work that cannot be completed by the original planar upper and lower molds. However, in the above application, the sole pressing is achieved by a single-sided pressing plate and a single-sided airbag. During pressing, the pressure plate is only subjected to the force of a single-sided airbag, resulting in poor sole pressing and shaping effect, which affects the processing of the sole. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect of poor sole pressing effect in the prior art and to provide a sole airbag pressing mechanism.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] This utility model provides a shoe sole airbag pressing mechanism, including a support base.

[0007] The upper airbag pressing component and the lower airbag pressing component are symmetrically distributed vertically, and both the upper airbag pressing component and the lower airbag pressing component are located above the support base. The upper airbag pressing component and the lower airbag pressing component are used to press the sole of the shoe with airbags.

[0008] The auxiliary pressing components are provided above the support base. Two auxiliary pressing components are symmetrically distributed on the left and right. The two auxiliary pressing components are respectively connected to the upper airbag pressing component and the lower airbag pressing component on both sides. The auxiliary pressing components are used to make the upper airbag pressing component and the lower airbag pressing component move closer to each other and further away from each other.

[0009] A rotating support assembly is provided, wherein the auxiliary pressing assemblies on both sides are connected to the rotating support assembly, and the rotating support assembly is connected to the top of the support base. The rotating support assembly is used to rotate the auxiliary pressing assembly, the upper airbag pressing component, and the lower airbag pressing component.

[0010] An airbag inflation / deflation assembly is connected to the top of the support base and is connected to the upper airbag pressing component and the lower airbag pressing component respectively. The airbag inflation / deflation assembly is used to inflate and deflate the upper airbag pressing component and the lower airbag pressing component.

[0011] In this technical solution, the auxiliary pressing component can be used to control the upper and lower airbag pressing components to move closer and further apart, and the airbag inflation and deflation component can be used to ventilate the upper and lower airbag pressing components, so that the upper and lower airbag pressing components can apply pressure to the sole from both sides simultaneously, preventing uneven force on the sole and resulting in poor pressing effect. At the same time, a rotating support component is set up so that the upper airbag pressing component, lower airbag pressing component and sole and other structures can be rotated during pressing, which can reduce the influence of gravity on the pressing and shaping of the sole and facilitate the removal of the sole.

[0012] Preferably, the upper airbag pressing component includes an upper pressing frame plate and an upper pressing airbag, with the upper pressing airbag connected to the inner side of the upper pressing frame plate.

[0013] In this technical solution, the upper airbag pressing component can be used to press the sole of the shoe from the top.

[0014] Preferably, the lower airbag pressing component includes a lower pressing frame plate and a lower pressing airbag, and the lower pressing frame plate is connected to the inner side of the lower pressing airbag.

[0015] In this technical solution, the lower airbag pressing component can be used to press the sole of the shoe from the bottom.

[0016] Preferably, the auxiliary pressing assembly includes a connecting plate, and both sides of the upper airbag pressing component and the lower airbag pressing component are connected to the connecting plate, and two symmetrically distributed connecting strips are connected to one side of the connecting plate;

[0017] The end of the connecting strip away from the connecting plate is connected to the movable plate, and a telescopic device is connected between the two movable plates located on the same side and distributed vertically.

[0018] In this technical solution, the distance between the upper airbag pressing component and the lower airbag pressing component can be adjusted by using an auxiliary pressing component to assist in the pressing of the shoe sole.

[0019] Preferably, the connecting plate has multiple sliding holes, and multiple follower tracks are connected to the opposite side of the connecting plate on both the upper and lower sides;

[0020] The follower track surface located on one side of the connecting plate is slidably connected to the connecting plate on the other side through a sliding hole.

[0021] In this technical solution, the movement trajectories of the two moving plates can be defined by using the follow-up tracks on both sides.

[0022] Preferably, the rotary support assembly includes two upper gears, which are respectively disposed on both sides of the upper airbag pressing member;

[0023] The upper gear has a preset groove, and a fixed column is connected to the wall of the preset groove. The surface of the fixed column is slidably connected to the connecting strip.

[0024] The upper gear is connected to a plurality of mounting posts on the side away from the upper airbag pressing component, and a mounting plate is connected to the end of the mounting posts away from the upper gear.

[0025] The end of the mounting plate away from the mounting column is connected to an anti-detachment rotating shaft. The surface of the anti-detachment rotating shaft is rotatably connected to the support side plate. The bottom of the support side plate is connected to the top of the support base.

[0026] In this technical solution, the upper airbag pressing component, the lower airbag pressing component, and other structures can be rotated using a rotating support assembly.

[0027] Preferably, each of the two upper gears is meshed with a lower gear at its bottom, and the two lower gears are respectively connected to the surface of the transmission shaft. Both ends of the transmission shaft are rotatably connected through the support side plate.

[0028] In this technical solution, a transmission shaft is used to enable the two lower gears to rotate simultaneously.

[0029] Preferably, one end of the drive shaft is connected to the output end of a rotary power source, and the rotary power source is connected to the top of the support base.

[0030] In this technical solution, a rotary power source can be used to provide driving force for the rotation of structures such as transmission shafts.

[0031] Preferably, the airbag inflation / deflation assembly includes a mounting bracket connected to the top of the support base, and a gas inflation / deflation device is placed on the mounting bracket;

[0032] The outlet end of the gas charging and discharging device is connected to two telescopic connecting pipes, which are respectively connected to the top of the upper airbag pressing component and the bottom of the lower airbag pressing component.

[0033] In this technical solution, the airbag inflation and deflation assembly can be used to inflate and deflate the upper and lower airbag pressing components, and to press and release the sole of the shoe.

[0034] Preferably, the two telescopic connecting pipes are slidably connected to the baffle plate, and the bottom of the baffle plate is connected to the top of the support base;

[0035] The two telescopic connecting pipes respectively pass through the upper pressure frame plate and the lower pressure airbag and are connected to the upper pressure airbag and the lower pressure airbag.

[0036] In this technical solution, two telescopic connecting pipes can be used to connect the upper airbag pressing component to the gas inflation / deflation device and the lower airbag pressing component to the gas inflation / deflation device, respectively.

[0037] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0038] The positive and progressive effects of this utility model are as follows:

[0039] This invention utilizes an auxiliary pressing component to control the upper and lower airbag pressing components to move closer and further apart, and an airbag inflation / deflation component to ventilate the upper and lower airbag pressing components. This allows the upper and lower airbag pressing components to apply pressure to the sole simultaneously from both sides, preventing uneven force on the sole and resulting in poor pressing effect. A rotating support component is also included, allowing the upper and lower airbag pressing components and the sole to rotate during pressing, reducing the impact of gravity on the sole pressing process and facilitating sole removal. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the shoe sole airbag pressing mechanism according to an embodiment of the present invention.

[0041] Figure 2 for Figure 1 The diagram shows the overall three-dimensional structure of the shoe sole airbag compression mechanism.

[0042] Figure 3 for Figure 1 The diagram shows a three-dimensional structural representation of the connection relationship between the upper airbag pressing component, the lower airbag pressing component, the auxiliary pressing component, and the rotating support component of the shoe sole airbag pressing mechanism.

[0043] Figure 4 for Figure 1 The diagram shows a front view of the upper airbag pressing component, lower airbag pressing component, auxiliary pressing component, and rotating support component of the shoe sole airbag pressing mechanism.

[0044] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the shoe sole airbag compression mechanism.

[0045] Figure 6 for Figure 4 The diagram shows a BB cross-sectional structure of the shoe sole airbag compression mechanism.

[0046] Figure 7 for Figure 4 The diagram shows a CC cross-sectional view of the shoe sole airbag compression mechanism.

[0047] Explanation of reference numerals in the attached figures

[0048] 1. Support base;

[0049] 2. Upper airbag pressing component; 21. Upper pressing frame plate; 22. Upper pressing airbag;

[0050] 3. Lower airbag pressing component; 31. Lower pressing frame plate; 32. Lower pressing airbag;

[0051] 4. Auxiliary pressing assembly; 41. Connecting plate; 42. Connecting strip; 43. Moving plate; 44. Telescopic device; 45. Follow-up track;

[0052] 5. Rotary support assembly; 51. Upper gear; 52. Fixed column; 53. Mounting column; 54. Mounting plate; 55. Anti-detachment rotating shaft; 56. Support side plate; 57. Lower gear; 58. Drive shaft; 59. Rotary power source;

[0053] 6. Airbag inflation / deflation assembly; 61. Mounting bracket; 62. Gas inflation / deflation equipment; 63. Telescopic connecting pipeline; 64. Baffle plate. Detailed Implementation

[0054] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0055] Figures 1 to 7 The diagram shown is a structural schematic of an embodiment of the sole airbag pressing mechanism of this utility model. The sole airbag pressing mechanism includes a support base 1.

[0056] The upper airbag pressing component 2 and the lower airbag pressing component 3 are symmetrically distributed vertically, and both the upper airbag pressing component 2 and the lower airbag pressing component 3 are located above the support base 1. The upper airbag pressing component 2 and the lower airbag pressing component 3 are used to press the sole of the shoe with airbags.

[0057] Auxiliary pressing components 4 are provided above the support base 1. Two auxiliary pressing components 4 are symmetrically distributed on the left and right. The two auxiliary pressing components 4 are respectively connected to the upper airbag pressing component 2 and the lower airbag pressing component 3 on both sides. The auxiliary pressing components 4 are used to make the upper airbag pressing component 2 and the lower airbag pressing component 3 approach each other and move away from each other.

[0058] The rotating support assembly 5 is connected to the auxiliary pressing assemblies 4 on both sides. The rotating support assembly 5 is connected to the top of the support base 1. The rotating support assembly 5 is used to rotate the auxiliary pressing assembly 4, the upper airbag pressing component 2 and the lower airbag pressing component 3.

[0059] An airbag inflation / deflation assembly 6 is connected to the top of the support base 1 and is connected to the upper airbag pressing component 2 and the lower airbag pressing component 3 respectively. The airbag inflation / deflation assembly 6 is used to inflate and deflate the upper airbag pressing component 2 and the lower airbag pressing component 3.

[0060] In this technical solution, the auxiliary pressing component 4 can control the upper airbag pressing component 2 and the lower airbag pressing component 3 to move closer and further apart, and the airbag inflation and deflation component 6 can ventilate the upper airbag pressing component 2 and the lower airbag pressing component 3, so that the upper airbag pressing component 2 and the lower airbag pressing component 3 can apply pressure to the sole from the upper and lower sides simultaneously, preventing uneven force on the sole and resulting in poor pressing effect. At the same time, a rotating support component 5 is set up so that the upper airbag pressing component 2, the lower airbag pressing component 3 and the sole can be rotated during pressing, which can reduce the influence of gravity on the pressing and shaping of the sole and facilitate the removal of the sole.

[0061] The upper airbag pressing component 2 includes an upper pressing frame plate 21 and an upper pressing airbag 22, with the upper pressing frame plate 21 having the upper pressing airbag 22 connected to its inner side.

[0062] In this technical solution, the upper airbag pressing component 2 can be used to press the sole of the shoe from the top.

[0063] The lower airbag pressing component 3 includes a lower pressing frame plate 31 and a lower pressing airbag 32, with the lower pressing frame plate 31 having the lower pressing airbag 32 connected to its inner side.

[0064] In this technical solution, the lower airbag pressing component 3 can be used to press the sole of the shoe from the bottom.

[0065] The auxiliary pressing component 4 includes a connecting plate 41. Both sides of the upper airbag pressing component 2 and the lower airbag pressing component 3 are connected to the connecting plate 41. Two symmetrically distributed connecting strips 42 are connected to one side of the connecting plate 41.

[0066] The end of the connecting strip 42 away from the connecting plate 41 is connected to the moving plate 43, and a telescopic device 44 is connected between the two moving plates 43 located on the same side and distributed vertically.

[0067] In this technical solution, the distance between the upper airbag pressing component 2 and the lower airbag pressing component 3 can be adjusted by using the auxiliary pressing component 4 to assist in the pressing of the shoe sole.

[0068] The connecting plate 41 has multiple sliding holes, and multiple follower tracks 45 are connected to the opposite side of the connecting plate 41 on both the upper and lower sides.

[0069] The surface of the follower track 45 located on one side of the connecting plate 41 is slidably connected to the connecting plate 41 on the other side through a sliding hole.

[0070] In this technical solution, the moving trajectories of the two moving plates 43 can be limited by the follow-up tracks 45 on both sides.

[0071] When in use, place the sole between the upper pressure airbag 22 and the lower pressure airbag 32, and then use the telescopic device 44 to drive the moving plates 43 on both sides to move towards each other, which can drive the corresponding follow-up track 45 to move in the same direction.

[0072] When the movable plate 43 moves, it can drive the connecting strip 42 and the connecting plate 41 to move in the same direction, which in turn can drive the upper airbag pressing component 2 and the lower airbag pressing component 3 to move in the same direction, that is, the upper airbag pressing component 2 and the lower airbag pressing component 3 can move towards each other, so that the upper airbag pressing component 2 and the lower airbag pressing component 3 come into contact. At this time, the airbag inflation and deflation component 6 can inflate the upper pressing airbag 22 and the lower pressing airbag 32, thereby using the upper pressing airbag 22 and the lower pressing airbag 32 to press the sole of the shoe.

[0073] After pressing is completed, the upper airbag pressing component 2 and the lower airbag pressing component 3 can be moved in opposite directions to make them move away from each other, which makes it easier to remove the shoe sole.

[0074] The rotating support assembly 5 includes two upper gears 51, which are respectively disposed on both sides of the upper airbag pressing component 2.

[0075] The upper gear 51 has a preset groove, and a fixed post 52 is connected to the wall of the preset groove. The surface of the fixed post 52 is slidably connected to the connecting strip 42.

[0076] The upper gear 51 is connected to a plurality of mounting posts 53 on the side away from the upper airbag pressing part 2, and the mounting post 53 is connected to a mounting plate 54 at the end away from the upper gear 51.

[0077] The end of the mounting plate 54 away from the mounting post 53 is connected to an anti-detachment rotating shaft 55. The surface of the anti-detachment rotating shaft 55 is rotatably connected to the support side plate 56. The bottom of the support side plate 56 is connected to the top of the support base 1.

[0078] In this technical solution, the rotating support assembly 5 can be used to rotate the upper airbag pressing component 2, the lower airbag pressing component 3, and other structures.

[0079] The bottom of each of the two upper gears 51 is meshed with a lower gear 57, and the two lower gears 57 are respectively connected to the surface of the drive shaft 58. The two ends of the drive shaft 58 are respectively rotatably connected to the support side plate 56.

[0080] In this technical solution, the transmission shaft 58 is used to enable the two lower gears 57 to rotate simultaneously.

[0081] One end of the drive shaft 58 is connected to the output end of the rotary power source 59, which is connected to the top of the support base 1.

[0082] In this technical solution, the rotary power source 59 can provide driving force for the rotation of structures such as the transmission shaft 58.

[0083] In use, the rotary power source 59 can drive the transmission shaft 58 to rotate, which in turn drives the two lower gears 57 to rotate. When the lower gears 57 rotate, they can drive the upper gear 51 to rotate, which in turn drives the mounting plate 54, mounting post 53, fixing post 52 and anti-detachment rotating shaft 55 to rotate, which in turn drives the connecting strip 42 and connecting plate 41 to rotate, thereby driving the upper airbag pressing component 2 and the lower airbag pressing component 3 to rotate.

[0084] This allows the upper airbag pressing component 2, the lower airbag pressing component 3, and the sole to rotate during the pressing process, reducing the influence of gravity on the sole pressing and improving the sole pressing and forming effect.

[0085] When removing the sole, rotate the upper airbag pressing component 2 and the lower airbag pressing component 3 to make them stand upright. At this time, move away from the upper airbag pressing component 2 and the lower airbag pressing component 3, so that the sole can automatically fall out between the upper airbag pressing component 2 and the lower airbag pressing component 3, making it easy to remove the sole.

[0086] It can rotate in a cyclical manner or rotate continuously in one direction.

[0087] The airbag inflation / deflation assembly 6 includes a mounting frame 61, which is connected to the top of the support base 1, and a gas inflation / deflation device 62 is placed on the mounting frame 61.

[0088] The outlet end of the gas charging and discharging device 62 is connected to two telescopic connecting pipes 63, which are respectively connected to the top of the upper airbag pressing component 2 and the bottom of the lower airbag pressing component 3.

[0089] In this technical solution, the airbag inflation and deflation assembly 6 can be used to inflate and deflate the upper airbag pressing component 2 and the lower airbag pressing component 3, thereby pressing and releasing the sole of the shoe.

[0090] The two telescopic connecting pipes 63 are respectively slidably connected to the baffle plate 64, and the bottom of the baffle plate 64 is connected to the top of the support base 1;

[0091] The two telescopic connecting pipes 63 respectively pass through the upper pressure frame plate 21 and the lower pressure airbag 32 and are connected to the upper pressure airbag 22 and the lower pressure airbag 32.

[0092] In this technical solution, two telescopic connecting pipes 63 can be used to connect the upper airbag pressing component 2 to the gas inflation / deflation device 62 and the lower airbag pressing component 3 to the gas inflation / deflation device 62, respectively.

[0093] In use, gas is filled or discharged into the upper pressure airbag 22 and the lower pressure airbag 32 through the gas filling and discharging device 62 and the telescopic connecting pipe 63, so that the upper pressure airbag 22 and the lower pressure airbag 32 can expand and contract.

[0094] The telescopic device 44 is an electric push rod, a lifting cylinder, or other equipment that can extend and retract autonomously.

[0095] The rotary power source 59 is an electric motor or other device that can output rotational kinetic energy.

[0096] The gas filling and defilling device 62 is a vacuum pump or other device that can inflate and de-inflate the upper airbag pressing component 2 and the lower airbag pressing component 3.

[0097] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A sole airbag press bonding mechanism comprising a support base (1), characterized in that, The sole airbag pressing mechanism further includes an upper airbag pressing component (2) and a lower airbag pressing component (3). The upper airbag pressing component (2) and the lower airbag pressing component (3) are symmetrically distributed vertically, and both the upper airbag pressing component (2) and the lower airbag pressing component (3) are located above the support base (1). The upper airbag pressing component (2) and the lower airbag pressing component (3) are used to press the sole with airbags. Auxiliary pressing components (4) are provided above the support base (1) with two auxiliary pressing components (4) symmetrically distributed on the left and right, and the two auxiliary pressing components (4) are respectively connected to the upper airbag pressing component (2) and the lower airbag pressing component (3) on both sides. The auxiliary pressing components (4) are used to make the upper airbag pressing component (2) and the lower airbag pressing component (3) approach each other and move away from each other. Rotary support assembly (5), the auxiliary pressing assemblies (4) on both sides are connected to the rotary support assembly (5), the rotary support assembly (5) is connected to the top of the support base (1), and the rotary support assembly (5) is used to rotate the auxiliary pressing assembly (4), the upper airbag pressing component (2) and the lower airbag pressing component (3); An airbag inflation / deflation assembly (6) is connected to the top of the support base (1) and is connected to the upper airbag pressing component (2) and the lower airbag pressing component (3) respectively. The airbag inflation / deflation assembly (6) is used to inflate and deflate the upper airbag pressing component (2) and the lower airbag pressing component (3).

2. The sole airbag pressing mechanism as described in claim 1, characterized in that: The upper airbag pressing component (2) includes an upper pressing frame plate (21) and an upper pressing airbag (22), with the upper pressing frame plate (21) having the upper pressing airbag (22) connected to its inner side.

3. The sole airbag press mechanism of claim 1, wherein: The lower airbag pressing component (3) includes a lower pressing frame plate (31) and a lower pressing airbag (32), and the lower pressing frame plate (31) is connected to the inner side of the lower pressing airbag (32).

4. The sole airbag press mechanism of claim 1, wherein: The auxiliary pressing assembly (4) includes a connecting plate (41). The upper airbag pressing component (2) and the lower airbag pressing component (3) are both connected to the connecting plate (41). Two symmetrically distributed connecting strips (42) are connected to one side of the connecting plate (41). The end of the connecting strip (42) away from the connecting plate (41) is connected to the moving plate (43), and a telescopic device (44) is connected between the two moving plates (43) located on the same side and distributed vertically.

5. The sole airbag press mechanism of claim 4, wherein: The connecting plate (41) has multiple sliding holes, and multiple follower tracks (45) are connected to the opposite side of the connecting plate (41) on both the upper and lower sides. The surface of the follower track (45) located on one side of the connecting plate (41) is slidably connected to the connecting plate (41) on the other side through a sliding hole.

6. The sole airbag press mechanism of claim 1, wherein: The rotating support assembly (5) includes two upper gears (51), which are respectively disposed on both sides of the upper airbag pressing component (2); The upper gear (51) has a preset groove, and a fixed column (52) is connected to the wall of the preset groove. The surface of the fixed column (52) is slidably connected to the connecting strip (42). The upper gear (51) is connected to a plurality of mounting posts (53) on the side away from the upper airbag pressing part (2), and the mounting post (53) is connected to a mounting plate (54) at the end away from the upper gear (51); The mounting plate (54) is connected to an anti-detachment rotating shaft (55) at one end away from the mounting column (53). The surface of the anti-detachment rotating shaft (55) is rotatably connected to the support side plate (56). The bottom of the support side plate (56) is connected to the top of the support base (1).

7. The sole airbag press mechanism of claim 6, wherein: The bottom of each of the two upper gears (51) is meshed with a lower gear (57), and the two lower gears (57) are respectively connected to the surface of the transmission shaft (58). The two ends of the transmission shaft (58) are respectively rotatably connected to the support side plate (56).

8. The sole airbag press mechanism of claim 7, wherein: One end of the drive shaft (58) is connected to the output end of the rotary power source (59), which is connected to the top of the support base (1).

9. The sole airbag press mechanism of claim 1 wherein: The airbag inflation / deflation assembly (6) includes a mounting bracket (61), which is connected to the top of the support base (1), and a gas inflation / deflation device (62) is placed on the mounting bracket (61). The outlet end of the gas charging and discharging device (62) is connected to two telescopic connecting pipes (63), which are respectively connected to the top of the upper airbag pressing component (2) and the bottom of the lower airbag pressing component (3).

10. The sole airbag press fitting mechanism according to claim 9, wherein: The two telescopic connecting pipes (63) are slidably connected to the baffle plate (64), and the bottom of the baffle plate (64) is connected to the top of the support base (1); The two telescopic connecting pipes (63) pass through the upper pressure frame plate (21) and the lower pressure airbag (32) respectively and are connected to the upper pressure airbag (22) and the lower pressure airbag (32).

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