JP2006308025A - Suction pad and grip body therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction pad having improved safety and reliability by firmly fixing a suction lip to a sucked face with the sucking and adhering operation of a grip body while reliably maintaining the fixing condition even when the sucked face is irregularly or wavily uneven. <P>SOLUTION: The suction lip 4 is stored in a lip recessed portion 3 of a holder 1. A pressure reducing cam 5 is provided outside a base 2 to give pressure reducing operation to the suction lip 4 via an operation shaft 15. The suction lip 4 includes a flat lip body 14 and the operation shaft 15 embedded and fixed into the center of the lip body 14. The lip body 14 has an elastomer layer 14a and an adhesive layer 14b integrally laminated at least on the side of the sucked face of the elastomer layer 14a. Even when the sucked face is irregular, the adhesive layer 14b is adhered thereto in the condition of being deformed along the irregular face to reliably suck and fix the lip body 14 to the sucked face independently of whether uneven or not, while maintaining the condition for a long period. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a suction disk and a grip body having the suction disk as a fixing element. The grip body can be used for a handrail or a handle for handling, for example.

  Regarding the suction disk of the present invention, it is patented that the pressure-sensitive adhesive is held on the suction surface of the suction lip, and the suction power is improved by the cooperative action of the vacuum suction action of the suction lip and the adhesive force of the adhesive. It is known in documents 1 and 2. In the former, the suction lip is formed in the shape of a hollow truncated cone, and the adhesive is applied in a band shape near the outer peripheral edge of the inner surface. In the latter, ring-shaped depressions are formed at two locations on the inner surface of the suction lip, and the depression is filled with an adhesive flexible material, and a part thereof is exposed to the suction surface.

  Regarding the suction disk of the present invention, it is known in Patent Document 3 that an operation shaft is embedded and fixed when a lip body is molded. The lip body is made of polyurethane elastomer.

  Handrails that use this type of suction disk as a fixing element are known in Patent Documents 4 and 5. In patent document 4, the suction disk is comprised by a pair of bracket and the suction disk rod fixedly supported between both brackets. The bracket is composed of an adsorption lip, a cam that raises the adsorption lip to bring the adsorption surface into a decompressed state, a bracket body in which these are incorporated, and the like. At the time of use, the suction lip is bonded to the wall surface with an adhesive applied to the suction surface, and the suction lip is pulled up to a reduced pressure state by a cam. The suction lip in the suction disk of Patent Document 5 is configured with a sheet-like magnet and a re-adhesive adhesive applied to the surface thereof as fixed elements.

Japanese Utility Model Publication No. 39-19524 (middle of page 1, right column, Fig. 2) Japanese Utility Model Publication No. 40-31850 (first page, right column, upper row, FIG. 3) JP-A-8-93743 (paragraph number 0012, FIG. 1) JP-A-9-209539 (paragraph number 0035, FIG. 4) JP-A-11-293844 (paragraph number 0020, FIG. 4)

  According to the suction disk of Patent Document 1 that uses an adhesive in combination, the fixing force is improved. Furthermore, by pulling the knob provided on the outer surface of the suction lip, the adhesive layer can be separated without causing a separation mark. However, since the pressure-sensitive adhesive is applied in a strip shape to the inner surface of the suction lip formed into a hollow frustum shape, the suction lip is pressed flat and the adhesive layer is adhered smoothly. It is difficult. The suction lip is adsorbed on the adherend surface while the hollow frustoconical lip wall is elastically deformed into a flat plate shape. At this time, the outer peripheral edge of the lip slides in the radial direction, but this sliding movement is hindered by the adhesive. The suction disk of Patent Document 2 has the same problem.

  Also in the suction disk of Patent Document 2, the fixing force is improved by the amount of the adhesive used together. However, if the adherend surface has irregular surfaces such as irregularities and undulations, the reduced pressure state of the adsorption surface can be reliably maintained in the usage mode in which the irregular surface traverses the flexible material filled in the dent of the lip wall. difficult.

  In the handrail of Patent Document 3, the fixing force is improved by the amount of the adhesive used together. However, since it is substantially the same as fixing the bracket to the wall surface using only the adhesive, once the bracket is attached, its position and angle cannot be changed. Of course, the bracket can be forcibly peeled off from the wall surface, but the appearance is impaired, such as adhesion marks remaining.

  In that respect, since the handrail of Patent Document 4 uses a sheet-like magnet and a weakly viscous adhesive having re-adhesiveness as fixing elements, the position and angle of the bracket can be easily changed even after being attached to the wall surface. . The problem is that when the bracket is mounted on a tile wall or the like, the adsorption action by the sheet-like magnet cannot be obtained, and therefore the bracket's adhesive posture must be maintained only by the adhesive force of the weakly viscous adhesive. Therefore, it is difficult to set a large allowable load on the suction cup, and there is a concern about safety in supporting the weight of the user.

  The object of the present invention is to improve the structure of the lip body so that the suction disk can be firmly fixed by its adsorption action and adhesive action, and even if there are irregular surfaces such as irregularities and waviness on the adherend surface, An object of the present invention is to provide a suction plate that can maintain a fixed state and is excellent in safety and reliability. The object of the present invention is to easily attach and detach the suction disk if necessary, although it can be firmly fixed to the adherend surface. An object of the present invention is to provide a suction plate that can easily change the suction position and a grip body with this type of suction plate.

  As shown in FIG. 1, the suction disk of the present invention includes a holder 1, a suction lip 4 accommodated in a lip recess 3 provided on a base 2 of the holder 1, and a decompression cam 5 that operates the suction lip 4 under reduced pressure. The suction lip 4 includes a flat lip body 14 and an operation shaft 15 that is embedded and fixed in the center of the lip body 14. The decompression cam 5 arranged at the upper portion of the base 2 and the operation shaft 15 protruding above the base 2 are connected by a pin 21, and the operation shaft 15 is lifted by the decompression cam 5 to operate the lip body 14. The suction surface can be depressurized. In the suction disk having such a precondition, in the present invention, as shown in FIG. 1, the lip body 14 is composed of an elastomer layer 14a and an adhesive layer 14b integrally provided on at least the suction surface side of the elastomer layer 14a. It is characterized by.

  In FIG. 3, the lip body 14 can be composed of an elastomer layer 14a and an adhesive layer 14b that covers the entire outer surface of the elastomer layer 14a.

  The operation shaft 15 has a vertically oriented shaft body 15b and a disc-shaped seat plate 15a fixed to the lower end of the shaft body 15b, and the seat plate 15a and the lower portion of the shaft body 15b are located at the center of the elastomer layer 14. It is buried and fixed in the part.

  The elastomer layer 14a of the lip body 14 is formed by reacting and curing the isocyanate prepolymer (B) and a low molecular weight polyol in the presence of a catalyst. The pressure-sensitive adhesive layer 14b of the lip body 14 is formed by reacting an isocyanate prepolymer (B) and a polyether polyol (C).

  The separation sheet 10 is attached to the outer peripheral edge of the upper surface of the lip body 14. On the inner peripheral edge of the lip recess 3 formed in the pedestal 2, as shown in FIG. 2, a first annular wall 8 that receives the outer peripheral edge portion of the suction lip 4 via the separation sheet 10 and a first annular wall 8 surrounding the outer periphery of the suction lip 4. The two annular walls 9 can be formed in multiple stages, and a re-adhesive pressure-sensitive adhesive sheet 11 can be attached to the lower surface of the second annular wall 9.

  As shown in FIGS. 4 and 5, the grip body including the suction disk of the present invention includes a suction disk 30 and a grip bar 31 supported by the suction disk 30. The suction disk 30 connects the holder 1, the suction lip 4 accommodated in the lip recess 3 provided on the base 2 of the holder 1, the decompression cam 5 for depressurizing the suction lip 4, and the grip bar (handrail bar) 31. For this purpose, a connecting portion 34 provided outside the holder 1 is provided. The suction lip 4 includes a flat lip body 14 and an operation shaft 15 that is embedded and fixed in the center of the lip body 14. The lip body 14 is composed of an elastomer layer 14a and an adhesive layer 14b provided integrally on at least the suction surface side of the elastomer layer 14a.

  Specifically, the grip body can be configured for handrails by a plurality of suction disks 30 and handrail bars 31 whose both ends are fixedly supported by the suction disks 30.

  In the suction disk of the present invention, the holder 1, the suction lip 4 accommodated in the lip recess 3, and the decompression cam 5 for depressurizing the suction lip 4, the operation shaft 15 of the suction lip 4 is moved by the decompression cam 5. By pulling up, the suction surface of the lip body 14 can be decompressed. In addition, the lip body 14 is constituted by the elastomer layer 14a and the adhesive layer 14b provided on at least the adsorption surface side of the elastomer layer 14a, and the cooperative action of the reduced pressure adsorption action of the lip body 14 and the adhesion action of the adhesion layer 14b. This makes it possible to firmly adsorb and fix the suction disk to the adherend surface. In addition, since the pressure-reduced space can be reliably sealed by the adhesive action of the adhesive layer 14b and the fixed state can be reliably maintained, safety and reliability are significantly improved.

  The pressure-sensitive adhesive layer 14b adheres to the irregular surface in an elastically deformed state along the irregularities, not only when the adhesion surface is flat, but also with irregular surfaces such as irregularities and undulations. Since the space is sealed, the suction disk can be fixed by suction to a wider variety of adherend surfaces including irregular surfaces, and the application target can be expanded. Further, by switching the decompression cam 5, the lip body 14 can be changed between the suction state and the suction release state, so that the suction plate can be easily attached and detached as required. Therefore, the suction disk can be fixed by suction at a desired position only when necessary, or the suction position can be easily changed. Unlike conventional suction cups that apply adhesive to the lip body to increase the adhesive strength, there is no adhesion mark so that the adherend surface can be held in an appropriate state, and the effort to fix the suction cup by suction Can also be omitted.

  When the outer surface of the elastomer layer 14a is entirely covered with the adhesive layer 14b, the adhesive layer 14b positioned at the outer peripheral edge portion on the suction surface side of the lip body 14 is positioned on the peripheral side surface or the upper surface side of the elastomer layer 14a. It is reinforced by being continuous with the adhesive layer 14b. Moreover, the adhesive strength between the adhesive layer 14b and the elastomer layer 14a can be improved, and the adhesive layer 14b can be reliably prevented from peeling from the elastomer layer 14a. Therefore, the strength of the adhesive layer 14b adsorbed on the adherend surface can be improved, and the adsorber can be more reliably adsorbed and fixed to the adherend surface.

  The operation shaft 15 is composed of a shaft body 15b and a disk-shaped seat plate 15a, and the seat plate 15a and the lower portion of the shaft body 15b are fixed to the suction lip 4 fixedly embedded in the central portion of the elastomer layer 14. Accordingly, since the operating force applied by the decompression cam 5 can be concentrated and transmitted to the central portion of the elastomer layer 14a via the seat plate 15a, the lip body 14 can be deformed to an appropriate decompression state without difficulty. Since the elastomer layer 14 which is tougher than the adhesive layer 14b is deformed by the seat plate 15a, an excessive operating force can be prevented from acting on the adhesive layer 14b, and the lip body 14 can be reliably returned to the flat plate state. it can.

  The isocyanate prepolymer (B) and a low molecular weight polyol are reacted in the presence of a catalyst to form an elastomer layer 14a, and the isocyanate prepolymer (B) and the polyether polyol (C) are reacted to form an adhesive layer 14b. When the is formed, both layers 14a and 14b can be integrally laminated using the isocyanate prepolymer (B) as a common raw material.

  The separation sheet 10 mounted on the outer peripheral edge portion of the upper surface of the lip body 14 prevents the outer peripheral edge of the suction lip 4 from adhering to the first annular wall 8 and returns the decompression cam 5 to the standby state. The main body 14 is reliably returned to the flat free state. When the re-adhesive pressure-sensitive adhesive sheet 11 is attached to the second annular wall 9 surrounding the outer periphery of the suction lip 4, the outer periphery of the suction surface of the lip body 14 can be surrounded and sealed with the pressure-sensitive adhesive sheet 11. It is possible to prevent water droplets flowing down along the wall surface from permeating into the suction surface of the lip main body 14 and maintain the suction disk in a stable suction fixed state. Of course, the adhering force of the suction disk can be increased by the adhesive force of the adhesive sheet 11.

  According to the grip body of the present invention composed of the suction plate 30 having the above-described configuration and the grip bar 31 supported by the suction plate 30, the suction plate 30 can be firmly fixed to the adherend surface while the decompression cam. The suction plate 30 can be easily attached to and detached from the adherend surface simply by switching 5.

  According to the handrail grip body composed of the plurality of suction boards 30 and the handrail bar 31 fixed at both ends by the suction board 30, the mounting position of the suction board 30 can be easily changed. The handrail can be installed at the optimum position according to the physical circumstances and the building structure of the place where the handrail is installed.

(Example 1) FIG.1 and FIG.2 has shown Example 1 of the suction disk based on this invention, and it accommodates in the plastic-made holder 1, the base 2 of the holder 1, and the lip recessed part 3 provided in the base 2. FIG. The suction lip 4 is provided, a decompression cam 5 disposed on the pedestal 2 to depressurize the suction lip 4, and a latch 6 screwed into the holder 1.

  On the inner peripheral edge of the lip recess 3, a downward first annular wall 8 formed in a circle to receive the upper surface of the outer peripheral edge of the suction lip 4, and a circular second annular wall surrounding the outer periphery of the suction lip 4 9 are formed in a multistage shape. The first annular wall 8 acts to improve the sealing force of the suction surface of the lip body 14 by pressing the outer peripheral edge portion of the lip body 14 in the suction state so as to be in close contact with the adherend surface.

  In order to avoid the outer peripheral edge of the lip body 14 from adhering to the first annular wall 8 in the suction state, the separation sheet 10 is mounted on the upper surface of the outer peripheral edge of the lip main body 14. The separation sheet 10 is formed in a ring shape by punching a polypropylene sheet. A re-adhesive pressure-sensitive adhesive sheet 11 punched into a ring shape is attached to the lower surface of the second annular wall 9. The pressure-sensitive adhesive sheet 11 surrounds the outer periphery of the suction surface of the suction lip 4 and prevents liquid droplets and dust from entering the suction surface of the lip body 14. In a state where the suction lip 4 is attracted, the periphery of the base 2 is slightly lifted away from the adherend surface as shown in FIG.

  The suction lip 4 includes a circular flat plate-like lip body 14 and an operation shaft 15 that is embedded and fixed in the center of the lip body 14. The lip body 14 has an upper elastomer layer 14a made of polyurethane elastomer and a lower adhesive layer 14b provided on the adsorption surface side of the elastomer layer 14a. The elastomer layer 14a has toughness while having moderate elasticity. The adhesive layer 14b has softer viscoelasticity and stronger adhesive force than the elastomer layer 14a. Therefore, even when there is unevenness on the adherend surface, bonding is performed while deforming along the unevenness, and the reduced pressure space is reliably sealed.

  The operation shaft 15 includes a disk-shaped seat plate 15a made of a press fitting and a vertically long shaft body 15b made of a steel round shaft, and the seat plate 15b is integrally assembled at the lower end of the shaft body 15b. The seat plate 15a and the base portion of the shaft body 15b are embedded and fixed in the central portion of the elastomer layer 14a. The suction lip 4 is accommodated in the lip recess 3, and the upper end of the operation shaft 15 protrudes from the upper portion of the base 2.

  The elastomer layer 14a is formed by reacting and curing the isocyanate prepolymer (B) and a low molecular weight polyol in the presence of a catalyst.

Specifically, an isocyanate prepolymer having an NCO content of 6 to 10% obtained by reacting a polyether polyol (A) having an OH equivalent of 1000 to 2000 and an OH group number of 2.5 to 4 with a diisocyanate. B) and
A low molecular weight polyol having an OH equivalent of 50 to 150 and an OH group number of 2 to 3,
So that the NCO / OH ratio is 1.0 to 1.1,
Both (isocyanate prepolymer (B) and low molecular weight polyol) were reacted in the presence of a catalyst and cured to form an elastomer layer 14a.

  The polyether polyol (A) is obtained by adding an alkylene oxide to a polyhydric alcohol. As the polyhydric alcohol, glycols such as propylene glycol and ethylene glycol, triols such as glycerin and trimethylolpropane, and tetrahydric alcohols such as pentaerythritol alone or a mixture thereof can be applied. As the alkylene oxide, ethylene oxide, propylene oxide, butylene oxide and the like can be applied.

  The OH equivalent of the polyether polyol (A) is preferably 1000 to 2000, and more preferably 1200 to 1700. When the OH equivalent is less than 1000, the elastomer layer 14a is excessively hard, and when it exceeds 2000, the elastomer layer 14a is excessively soft. In any case, the elastomer layer 14a is not suitable. Further, if the number of OH groups is less than 2.5, the elasticity of the elastomer layer 14a is impaired, and if it exceeds 4, it becomes too hard, and in any case, it is not suitable as the elastomer layer 14a.

  Examples of the diisocyanate that reacts with the polyether polyol (A) include toluene diisocyanate, diphenylmethane diisocyanate, and isophorone diisocyanate. Preferably, diphenylmethane diisocyanate and its derivatives are applied.

  The reason why the NCO content of the isocyanate prepolymer (B) is 6 to 10% is that when the NCO content is less than 6%, the viscosity of the isocyanate prepolymer increases. When the NCO content exceeds 10%, the elastomer layer 14a becomes hard. Moreover, it becomes fragile.

  The low molecular weight polyol is composed of glycols such as 1.4 butanediol and ethylene glycol, a polyol obtained by adding alkylene oxide to glycerin and trimethylolpropane, or a mixture thereof. If the OH equivalent of the low molecular weight polyol is less than 50, the elastomer layer 14a becomes too hard, and if it exceeds 150, it becomes too soft. The reason why the number of OH groups in the low molecular weight polyol is 2 to 3 is that if it is less than 2, the strength of the elastomer layer 14a is insufficient, and if it exceeds 3, it becomes too hard.

  When the NCO / OH ratio of the isocyanate prepolymer (B) and the low molecular weight polyol is less than 1.0, the strength of the elastomer layer 14a is insufficient and the tackiness is unnecessarily increased. If the NCO / OH ratio exceeds 1.1, the elastomer layer 14a becomes too hard. For the above reasons, the isocyanate prepolymer (B) and the low molecular weight polyol were reacted under the reaction conditions described above and cured to form the elastomer layer 14a.

  The adhesive layer 14b was a reaction product obtained by bringing the isocyanate prepolymer (B) and the polyether polyol (C) into an NCO / OH ratio of 0.7 to 1.1.

  The polyether polyol (C) is obtained by adding 3 to 10% by weight of monool to the polyether polyol (A). As monools, monovalent saturated alcohols such as methanol, butanol, and 2-ethylhexyl alcohol, monovalent unsaturated alcohols such as oleyl alcohol, or saturated and unsaturated fatty acids added with alkylene oxide can be used.

  When the added amount of monool is less than 3% by weight, the adhesiveness of the adhesive layer 14b is insufficient, and when it exceeds 10% by weight, the adhesiveness is too strong to be peeled off from the adhesive surface.

  When the NCO / OH ratio of the isocyanate prepolymer (B) and the polyether polyol (C) is less than 0.7, the adhesiveness is too strong to be peeled off from the pressure-sensitive adhesive surface. The part remains on the adhesive surface and damages the appearance. If the NCO / OH ratio exceeds 1.1, sufficient tackiness cannot be obtained, and the reduced pressure state cannot be maintained. The NCO / OH ratio between the isocyanate prepolymer (B) and the polyether polyol (C) is preferably 0.8 to 1.1.

  As described above, since the elastomer layer 14a and the adhesive layer 14b are formed by injecting a two-component polyurethane stock solution using the isocyanate prepolymer (B) as a common raw material into a mold, both layers 14a and 14b are strong. Close contact with. As shown in FIG. 2, when the adhesive layer 14b is formed only on the suction surface side of the elastomer layer 14a, for example, the preformed adhesive layer 14b is formed together with the operation shaft 15 on a mold for molding the elastomer layer 14a. It can be formed by charging and injecting the previous molten resin. As shown in FIG. 3, when the entire outer surface of the elastomer layer 14a is covered with the adhesive layer 14b, the operating shaft 15 is embedded in the elastomer layer 14a in advance, and this is formed into a molding metal for the adhesive layer 14b. It can be formed by pouring molten resin in a state where it is loaded in a mold.

  The decompression cam 5 includes a first cam surface 18 and a second cam surface 19 which are formed adjacent to each other in an orthogonal state, and a keyhole-shaped connecting hole 20 is formed on a circumferential surface facing the first cam surface 33. It is. The decompression cam 5 and the operation shaft 15 of the suction lip 4 are connected by a roll pin 21. FIG. 1 shows a standby posture in which the first cam surface 18 contacts the upper receiving surface 2a of the pedestal 2 by rotating the decompression cam 5 by 90 degrees around the roll pin 21 with the operation rod 22 engaged with the connecting hole 20. As shown, the second cam surface 19 can be switched to an operating posture in which the second cam surface 19 hits the upper surface of the base 2.

  When the decompression cam 5 is switched from the standby posture to the operation posture, the operation shaft 15 is pulled upward, so that the central portion of the lip body 14 is elastically deformed upwardly, and the suction surface of the suction lip 4 is decompressed. The outer peripheral edge of the lip main body 14 received by the one annular wall 8 can be firmly adsorbed to the adherend surface. Even if there are irregularities on the adherend surface, the adhesive layer 14b of the lip body 14 adheres in a deformed state along the irregularities, so that the decompression space can be reliably sealed. When the decompression cam 5 is returned from the operating posture to the standby posture, the operation shaft 15 is lowered and the decompressed state is released. Therefore, the adhesive sheet 11 and the lip body 14 can be peeled off from the suction surface, and the suction plate can be removed. .

  The latching tool 6 shown in FIG. 1 is a plastic molded product integrally including a cylindrical base portion 24 screwed into a boss 23 provided on the base 2 and a receiving arm 25 having a C-shaped cross section. For example, a shower head or a bathroom cleaning tool can be hung on the arm 25. If you prepare multiple types of hook-shaped latches, clip-shaped latches, ring-shaped latches, etc., you can expand the use of the suction cup and absorb by replacing the latches The usage of the board can be changed. In the state in which the latching tool 6 is screwed into the holder 1, the entire upper surface of the base 2 is covered with the tube base 24, so that it is possible to reliably prevent water from entering and attaching dust.

Example 2 FIG. 3 shows Example 2 of the present invention relating to the lip body 14. Here, the entire outer surface of the elastomer layer 14a is covered with an adhesive layer 14b. According to such a lip body 14, compared to the lip body 14 described above, the portion of the adhesive layer 14b located on the outer peripheral edge portion on the suction surface side of the lip body 14 is on the peripheral side surface or the upper surface side of the elastomer layer 14a. Since it is reinforced by being continuous with the portion of the adhesive layer 14b positioned, the strength of the adhesive layer 14b adsorbed on the adherend surface can be improved. In particular, the adhesive strength between the pressure-sensitive adhesive layer 14b and the elastomer layer 14a is improved, and the pressure-sensitive adhesive layer 14b can be reliably prevented from peeling off from the elastomer layer 14a.

(Embodiment 3) FIGS. 4 to 7 show Embodiment 3 of the grip body of the present invention in which the above suction disk is applied to a handrail. The handrail shown in FIG. 4 includes a pair of suction plates 30, a handrail rod (grip rod) 31 whose both ends are fixedly supported by the adjacent suction plates 30, and a joint 32 that connects the suction plate 30 and the handrail rod 31. .

  The suction disk 30 in the third embodiment has the same basic structure as the suction disk described above, but the structure of the holder 1 is slightly different. Therefore, only this difference will be described, and the other members are denoted by the same reference numerals. Therefore, the description is omitted. As shown in FIG. 4, the outer shape of the pedestal 2 of the holder 1 is formed in a tunnel cross-sectional shape. A round cylindrical connecting portion 34 is integrally formed on the outer upper portion of the base 2, and the handrail bar 31 is connected via a joint 32 and an adjustment ring 35 loaded in the connecting portion 34.

  The joint 32 includes a cylindrical case 36 that is fitted into the adjustment ring 35 and the handrail bar 31, and a fastening piece 37 that is fitted into the case 36. The case 36 is fastened and fixed to the connecting portion 34 by screwing the first bolt 38 inserted along the center of the cylinder from the outer surface of the connecting portion 34 into a nut 39 attached to the fastening piece 37. Furthermore, the handrail bar 31 and the joint 32 are fastened and fixed by screwing a second bolt 40 inserted into the peripheral wall of the case 36 from the outer surface of the handrail bar 31 into an insert nut 41 provided on the fastening piece 37.

  The inner surface of the adjustment ring 35, the inner and outer surfaces of the case 36, and the outer surface of the end fitting wall of the fastening piece 37 are each formed with a part of a circular circumferential surface in a flat non-circular cross section, and Engage in a state where relative rotation is not possible. Therefore, the second bolt 40 can be securely screwed into the insert nut 41 simply by matching the bolt insertion hole formed in the handrail rod 31 with the bolt insertion hole of the case 36.

  The periphery of the decompression cam 5 is covered with a cover 44 on the upper surface side of the pedestal 2 in order to clean the appearance of the holder 1 and prevent the decompression cam 5 from being switched by mischief or the like. As shown in FIG. 6, the cover 44 is a petal-like plastic molded product, and covers the outer surface of the decompression cam 5 exposed on the upper surface side of the pedestal 2 and the operation head of the first bolt 38 in a state of covering the holder 1. Is press-fitted and engaged. The handrail bar 31 is composed of a round pipe 45 made of aluminum and an outer layer body 46 made of a soft resin that covers the outer surface of the round pipe 45.

  In the handrail having the above structure, the decompression cam 5 is rotated by the operation rod 22 with the cover 44 removed from the holder 1, and the lip main body 14 is pulled toward the back wall side of the lip recess 3 as shown in FIG. By doing so, the suction surface can be depressurized, and the peripheral portion of the lip body 14 received by the first annular wall 8 can be firmly attached to the adherend surface.

  The handrail can be constructed as shown in FIG. 7, for example. In FIG. 7A, the two handrail bars 31 are fixedly supported in a straight line by the two suction disks 30 and 30 for supporting the rod end of the handrail bar 31 and the suction disk 30A for intermediate support. In FIG. 7B, the two handrail bars 31 are fixedly supported in an orthogonal manner by the two suction disks 30 and 30 for supporting the rod end of the handrail bar 31 and the elbow-shaped suction disk 30B for intermediate support. did. The suction support 30A for intermediate support and the suction support 30B for elbow-shaped intermediate support have the same basic structure as the suction support 30 for rod end support, but two connecting portions 34 are linearly connected to the holder 1. The difference is that they are provided in an orthogonal or orthogonal shape.

  In addition to the above, the decompression cam 5 may be integrally formed with a lever corresponding to the operation rod 22. The holder can be made more precisely from light metal such as aluminum. The grip body of the present invention can be configured as a handle for handling other than a handrail.

It is a longitudinal cross-sectional view of Example 1 which shows the adsorption | suction state of an adsorption | suction board. It is an expanded sectional view of the E section in FIG. It is a longitudinal cross-sectional view which shows Example 2 of a suction disk. It is a front view of the handrail (Example 3) formed using the suction disk. FIG. 6 is an exploded cross-sectional view of a suction disk in a handrail of Example 3. It is a longitudinal cross-sectional view which shows the suction state of the suction disk in the handrail of Example 3. FIG. It is a front view explaining the construction example of the handrail of Example 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holder 2 Base 3 Lip recessed part 4 Adsorption lip 5 Decompression cam 14 Lip main body 14a Elastomer layer 14b of lip main body Adhesive layer 15 of lip main body Operation shaft

Claims (7)

The holder (1), the suction lip (4) accommodated in the lip recess (3) provided on the base (2) of the holder (1), and the decompression cam (5) for decompressing the suction lip (4) Including
The suction lip (4) includes a flat lip body (14) and an operation shaft (15) embedded and fixed in the center of the lip body (14).
The decompression cam (5) arranged on the upper part of the pedestal (2) and the operation shaft (15) protruding above the pedestal (2) are connected by a pin (21), and the decompression cam (5) is operated by the operation shaft. A suction disk capable of depressurizing the suction surface of the lip body (14) by pulling up (15);
The lip body (14) is composed of an elastomer layer (14a) and an adhesive layer (14b) integrally provided on at least the suction surface side of the elastomer layer (14a).   The suction disk according to claim 1, wherein the lip body (14) is composed of an elastomer layer (14a) and an adhesive layer (14b) covering the entire outer surface of the elastomer layer (14a).   The operating shaft (15) has a vertically oriented shaft body (15b) and a disc-shaped seat plate (15a) fixed to the lower end of the shaft body (15b). The seat plate (15a) and the shaft body ( The suction plate according to claim 1 or 2, wherein a lower portion of 15b) is embedded and fixed in a central portion of the elastomer layer (14). The elastomer layer (14a) of the lip body (14) is formed by reacting and curing the isocyanate prepolymer (B) and a low molecular weight polyol in the presence of a catalyst,
The adsorption disk according to any one of claims 1 to 3, wherein the adhesive layer (14b) of the lip body (14) is formed by reacting the isocyanate prepolymer (B) and the polyether polyol (C). A separation sheet (10) is attached to the outer peripheral edge of the upper surface of the lip body (14),
On the inner peripheral edge of the lip recess (3) formed in the pedestal (2), a first annular wall (8) for receiving the outer peripheral edge of the suction lip (4) through the separation sheet (10), and the suction lip (4 ) And the second annular wall (9) surrounding the periphery of the
The suction disk according to claim 4, wherein a re-adhesive pressure-sensitive adhesive sheet (11) is attached to the lower surface of the second annular wall (9). A grip body comprising a suction plate (30) and a gripping rod (31) supported by the suction plate (30),
The suction disk (30) operates to depressurize the holder (1), the suction lip (4) accommodated in the lip recess (3) provided in the base (2) of the holder (1), and the suction lip (4). A decompression cam (5), and a connecting portion (34) provided outside the holder (1) for connecting the grip rod (31);
The suction lip (4) includes a flat lip body (14) and an operation shaft (15) embedded and fixed in the center of the lip body (14).
The lip body (14) is composed of an elastomer layer (14a) and an adhesive layer (14b) integrally provided on at least the suction surface side of the elastomer layer (14a). body.   The grip body with a suction disk according to claim 6, comprising a plurality of suction disks (30) and a handrail bar (31) whose both ends are fixedly supported by the suction disks (30).

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