CN210835320U

CN210835320U - Optical fiber cutter

Info

Publication number: CN210835320U
Application number: CN201921683539.6U
Authority: CN
Inventors: 周欢
Original assignee: Shanghai Longli Communication Equipment Installation Engineering Co ltd
Current assignee: Shanghai Longli Communication Equipment Installation Engineering Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-23
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses an optical fiber cutter belongs to a cutterbar equipment technical field, and its technical scheme main points are including the base, are equipped with the platform on the base, have seted up the optic fibre fixed slot on the platform, and the one end of optic fibre fixed slot is equipped with the cutting knife, and articulated on the platform have a clamp plate, and the clamp plate is located the top of cutting knife, its characterized in that: be connected with garbage collection device in one side that is close to the cutting knife, garbage collection device includes open-top's waste material temporary storage case and transfer case, waste material temporary storage case and platform fixed connection, the transfer case can be dismantled with the bottom of waste material temporary storage case and be connected, the intercommunication mouth has been seted up to the bottom of waste material temporary storage case, intercommunication mouth and transfer case intercommunication are equipped with the subassembly that shelters from the intercommunication mouth temporarily between transfer case and the waste material temporary storage case, reach the condition that reduces the optic fibre waste material and stab operating personnel, improve the effect of safety in utilization.

Description

Optical fiber cutter

Technical Field

The utility model relates to a cutterbar equipment field, in particular to optic fibre cutterbar.

Background

The optical fiber is a short-hand writing of optical fiber, is a fiber made of glass or plastic, and can be used as a light conduction tool, and the transmission principle of the optical fiber is total reflection of light. In optical fiber sensing, optical fibers are often required to be welded, before the optical fibers are welded, the optical fibers need to be cut and the section of the optical fibers needs to be flat, and in the existing optical fiber cutting, an optical fiber cutter is often used.

The existing Chinese patent with reference to publication number CN205562863U discloses an optical fiber cutter, which comprises a base, wherein a platform is arranged on the base, an optical fiber fixing groove is formed in the platform, a sliding block capable of moving back and forth is arranged on one side of the optical fiber fixing groove, a cutting knife for cutting an optical fiber is arranged on the sliding block, a pressing plate capable of rotating and pressing downwards is further arranged on the platform, the pressing plate is located above the cutting knife, two parallel sliding rails are arranged on the inner side of the sliding block, and two parallel sliding rods matched with the sliding rails are arranged on the outer side of the platform. When the cutting tool is used, the protective layer at one end of the optical fiber to be cut is removed, the optical fiber at the end is exposed, then the optical fiber is placed in the optical fiber fixing groove, the pressing plate is rotated downwards, the pressing plate and the platform compress the optical fiber, and finally the sliding block is pushed and drives the cutting knife to move and cut the optical fiber.

However, after the optical fiber cutter finishes cutting, the cut optical fiber waste falls on the workbench, the cut optical fiber waste has small volume and sharp end, and the optical fiber waste falling on the workbench easily punctures operators, so that potential safety hazards are brought to the operators.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an optic fibre cutterbar reaches the condition that reduces the optic fibre waste material and stabs operating personnel, improves the effect of safety in utilization.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an optical fiber cutter, the on-line screen storage device comprises a base, be equipped with the platform on the base, the optic fibre fixed slot has been seted up on the platform, the one end of optic fibre fixed slot is equipped with the cutting knife, it has the clamp plate to articulate on the platform, the clamp plate is located the top of cutting knife, one side near the cutting knife is connected with garbage collection device, garbage collection device includes open-top's waste material temporary storage case and transfer case, waste material temporary storage case and platform fixed connection, the transfer case can be dismantled with the bottom of waste material temporary storage case and be connected, the intercommunication mouth has been seted up to the bottom of waste material temporary storage case, intercommunication mouth and transfer case intercommunication are equipped with the subassembly that shelters.

Through adopting above-mentioned technical scheme, fix a position in putting into the optic fibre fixed slot on the platform with optic fibre, reuse clamp plate compresses tightly optic fibre fixedly, and at this moment, the end of optic fibre is exposed in the outside of clamp plate and platform, and the end of optic fibre is located the top of waste material temporary storage case promptly, then the cutting knife cuts optic fibre. The cut fiber waste is the fiber end exposed outside the pressing plate and the platform before cutting. Because the optical fiber end is positioned at the top of the waste material temporary storage box, the cut optical fiber waste material directly falls into the waste material temporary storage box. The waste material temporary storage box collects the optical fiber waste materials, the optical fiber waste materials cannot fall onto the working table, the situation that the optical fiber waste materials stab operating personnel is reduced, and therefore the use safety is improved.

The bottom intercommunication of waste temporary storage case has the transfer case, and after the transfer incasement was full of the optic fibre waste material, sheltered from the subassembly and temporarily sheltered from the intercommunication mouth to take off the transfer case with the interior optic fibre waste material of clearing transfer case. When the optical fiber waste in the intermediate transfer box is cleaned, the optical fiber waste cut by the cutter is temporarily stored in the waste temporary storage box, so that the continuity of receiving the optical fiber waste is ensured, the optical fiber can be continuously cut, and the working efficiency is improved.

The utility model discloses further set up to, be provided with the joint subassembly between waste material temporary storage case and the transfer case, the joint subassembly includes T type draw-in groove and T type fixture block, and T type draw-in groove level is seted up in the bottom surface of waste material temporary storage case, T type fixture block and transfer case fixed connection, and T type fixture block is gone into along T type draw-in groove length direction removal in the T type draw-in groove from the one end card of T type draw-in groove.

Through adopting above-mentioned technical scheme, T type fixture block and transfer case fixed connection, T type fixture block insert in the T type draw-in groove and move along the length direction of T type draw-in groove from the one end of T type draw-in groove to it is fixed with transfer case and waste material temporary storage case joint, then can make the optic fibre waste material in the waste material temporary storage case enter into the transfer incasement through the intercommunication mouth.

After the transfer incasement was collected full optic fibre waste material, the pulling transfer case made T type fixture block break away from with T type draw-in groove, removed the fixed of transfer case and waste material temporary storage case, simultaneously, sheltered from the subassembly and shelter from the intercommunication mouth, prevent that optic fibre waste material from dropping to table surface through the intercommunication mouth on, reduce optic fibre waste material and prick operating personnel's the condition to improve the safety in utilization.

The utility model discloses further set up to, shelter from the subassembly and include shielding plate and coupling spring, the shielding plate level is located the intercommunication mouth in order to shelter from the intercommunication mouth, coupling spring's flexible direction is the same with the length direction of T type draw-in groove, coupling spring's one end and the inner wall fixed connection of waste material temporary storage case, the other end and shielding plate fixed connection, the bottom surface fixedly connected with of shielding plate promotes the catch bar that shielding plate removed, the catch bar is located the shielding plate and keeps away from coupling spring's one end.

Through adopting above-mentioned technical scheme, T type fixture block inserts the back in the T type draw-in groove from the one end of T type draw-in groove, catch bar and the outer wall butt of transfer case. Along with the transfer case moves along T type groove, then push away the catch bar and move to the direction that is close to the connecting spring, the connecting spring is compressed, and the shielding of intercommunication mouth is relieved to the shielding plate, makes waste material temporary storage case and transfer case intercommunication.

The shielding of the communication port by the shielding plate is released while the transfer box is fixed; when the transfer box is taken down, the shielding plate moves towards the direction close to the communication port under the action of the elastic force of the connecting spring, so that the connecting port is shielded. When the transfer box is fixed and taken down, the shielding plate does not need to be moved specially by an operator, and the use is convenient and the operation is rapid.

The utility model discloses further set up to, be equipped with the guide bar between shielding plate and the waste material temporary storage case, the length direction of guide bar is the same with coupling spring's flexible direction, the one end of guide bar and the inner wall fixed connection of waste material temporary storage case, the other end of guide bar insert in the shielding plate with shielding plate sliding connection.

Through adopting above-mentioned technical scheme, the shielding plate is at the removal in-process, and the guide bar leads the shielding plate, improves the stability that the shielding plate removed the in-process.

The utility model discloses further set up to, be equipped with the dead lever on the lateral wall of waste material temporary storage case, the dead lever is located the one side of keeping away from coupling spring, and the top and the waste material temporary storage case of dead lever rotate to be connected, and the bottom of dead lever is less than the bottom surface of waste material temporary storage case.

Through adopting above-mentioned technical scheme, be connected with the dead lever in the one side of keeping away from coupling spring, the transfer case card is gone into the bottom back of waste material temporary storage case, rotates the dead lever and makes dead lever and transfer case keep away from one side butt of catch bar, prevents that the transfer case from moving to the direction of keeping away from coupling spring under coupling spring's spring action, increases the stability of transfer case to improve and connect the material accuracy, reduce the waste material and fall the condition on table surface.

The utility model discloses further set up to, the top of guide bar is equipped with the stock guide, the top of stock guide and the top fixed connection of waste material temporary storage case, the bottom downward sloping of stock guide to be located the top of intercommunication mouth.

Through adopting above-mentioned technical scheme, the optic fibre waste material that enters into the waste material temporary storage incasement slides to the position of intercommunication mouth under the effect of stock guide, is convenient for make optic fibre waste material get into the transfer case smoothly. Meanwhile, the optical fiber waste is prevented from falling to the position of the guide rod, so that the smoothness of the shielding plate when the shielding plate moves along the wire guide rod is guaranteed.

The utility model discloses further set up to, the both sides of cutting knife cutting direction are provided with the subassembly that compresses tightly of compressing tightly optic fibre, compress tightly the subassembly and include pressure pad and lower pressure pad, go up the bottom surface fixed connection of pressure pad and clamp plate, lower pressure pad with be located the pressure pad under, the top surface fixed connection of pressure pad and platform down.

Through adopting above-mentioned technical scheme, go up the pressure pad and press down the cooperation of pad and will treat the optic fibre of cutting and compress tightly fixedly, prevent that the cutting knife from taking place to remove when cutting optic fibre to guarantee the cutting accuracy of optic fibre, and make the optic fibre section level and smooth.

This practicality further sets up to, it has last slipmat to bond on the pressure pad, bonds on the pressure pad down and has lower slipmat.

Through adopting above-mentioned technical scheme, go up slipmat and the stability of slipmat when further increasing optic fibre and being compressed tightly down, prevent that the cutting knife from taking place to remove when cutting optic fibre, improving the cutting accuracy of optic fibre, make the optic fibre section level and smooth.

To sum up, the utility model discloses following beneficial effect has:

1. the waste collecting device is arranged to collect the cut optical fiber waste into the transfer box through the communication port, so that the situation that the optical fiber waste falls onto the working table surface is reduced, the situation that operators are pricked by the optical fiber waste is reduced, and the safety of cutting the optical fiber is improved; and the transfer case can be dismantled with the waste material temporary storage case and be connected, and after the transfer incasement was filled with the optic fibre waste material, sheltered from the subassembly and temporarily sheltered from the intercommunication mouth to take off the transfer case with the interior optic fibre waste material of clearing transfer incasement. When the optical fiber waste is cleaned, the optical fiber waste cut by the cutter is temporarily stored in the waste temporary storage box, so that the continuity of receiving the optical fiber waste is ensured, the optical fiber can be continuously cut, and the working efficiency is improved;

2. the material guide plate is arranged, and the optical fiber waste entering the waste temporary storage box slides to the position of the communication port under the action of the material guide plate, so that the optical fiber waste can smoothly enter the transfer box. Meanwhile, the optical fiber waste is prevented from falling to the position of the guide rod, so that the smoothness of the shielding plate when the shielding plate moves along the wire guide rod is guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a portion of the structure intended to show the hold-down assembly;

FIG. 3 is a schematic view intended to show the construction of a waste collection device;

fig. 4 is a sectional view intended to show the material guide plate.

Reference numerals: 1. a base; 11. a platform; 111. an optical fiber fixing groove; 112. cutting; 113. a lower magnetic strip; 114. a slider; 12. pressing a plate; 121. mounting a magnetic strip; 2. a waste collection device; 21. a waste temporary storage tank; 211. a communication port; 212. fixing the rod; 22. a transfer box; 221. a material guide plate; 3. a compression assembly; 31. an upper pressure pad; 311. an upper anti-skid pad; 32. a lower pressure pad; 321. a lower non-slip mat; 4. a shielding component; 41. a shielding plate; 411. a push rod; 412. a guide bar; 42. a connecting spring; 5. a clamping assembly; 51. a T-shaped clamping groove; 52. t-shaped fixture blocks.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

An optical fiber cleaver, as shown in fig. 1, comprises a base 1, a platform 11 fixedly connected to the base 1, and an optical fiber fixing groove 111 formed on the top surface of the platform 11. A circular cutter blade 112 is provided at one end of the optical fiber fixing groove 111, a slider 114 is connected to the cutter blade 112, the slider 114 is slidably connected to the stage 11, and the slider 114 drives the cutter blade 112 to approach the optical fiber and cuts the optical fiber. A pressing plate 12 is arranged above the cutting knife 112, and one end of the pressing plate 12 is hinged with the platform 11. The bottom surface of clamp plate 12 is fixedly connected with goes up magnetic stripe 121, goes up magnetic stripe 121 and is located clamp plate 12 and keeps away from the one end of articulated department. The top surface of the platform 11 is fixedly connected with a lower magnetic strip 113 which is attracted with the upper magnetic strip 121. The above adopts the prior art with the publication number of CN205562863U, and the description of this embodiment is not repeated.

As shown in fig. 2, two groups of pressing assemblies 3 for pressing the optical fiber are provided between the platform 11 and the pressing plate 12, and the two groups of pressing assemblies 3 are respectively located at two sides of the cutting direction of the cutter 112. The pressing assembly 3 comprises an upper pressing pad 31 and a lower pressing pad 32, the upper pressing pad 31 is located on the bottom surface of the pressing plate 12 and is connected with the pressing plate 12 through bolts, and an upper anti-skid pad 311 is bonded on the upper pressing pad 31. The lower pressure pad 32 is located below the upper pressure pad 31, the lower pressure pad 32 is connected with the top surface of the platform 11 through bolts, the top surface of the lower pressure pad 32 is adhered with a lower non-slip pad 321, and the upper non-slip pad 311 is tightly abutted to the lower non-slip pad 321.

The optical fiber is placed on the optical fiber fixing groove 111 and the lower pressing pad 32, and the pressing plate 12 is pressed downward, so that the upper magnetic stripe 121 and the lower magnetic stripe 113 are attracted to each other. Meanwhile, the upper pressure pad 31 and the lower pressure pad 32 are tightly abutted to press and fix the optical fiber. Then, the slider 114 is pushed to move the cutter blade 112 in a direction to approach the optical fiber, thereby cutting the optical fiber.

As shown in fig. 3, a trash collecting device 2 is connected to a side close to the cutter blade 112, and the trash collecting device 2 includes a trash holding box 21 having an open top and a transfer box 22 having an open top. The waste holding tank 21 is fixedly connected to the side wall of the platform 11 (refer to fig. 1). The relay box 22 is located at the bottom of the waste holding box 21 and is detachably connected to the waste holding box 21. The waste storage box 21 has a communication port 211 formed in the bottom thereof, and the transfer box 22 communicates with the waste storage box 21 through the communication port 211. The communication port 211 is provided with a shielding member 4 for temporarily shielding the communication port 211.

As shown in fig. 3, a clamping assembly 5 is disposed between the transfer box 22 and the waste temporary storage box 21, and the clamping assembly 5 includes a T-shaped clamping groove 51 and a T-shaped clamping block 52. The T-shaped slots 51 are provided at the bottom of the trash holding box 21, and two T-shaped slots are provided, and the length direction of the two T-shaped slots is perpendicular to the length direction of the optical fiber fixing groove 111. One end of the T-shaped engaging groove 51 in the longitudinal direction is open. The T-shaped fixture block 52 is positioned in the T-shaped fixture groove 51 and is matched with the T-shaped fixture groove 51 for use. The T-shaped latch 52 is fixedly connected to the top surface of the transfer case 22.

The T-shaped latch 52 is inserted into the T-shaped slot 51 from one end of the T-shaped slot 51, and the transfer box 22 is pushed, so that the T-shaped latch 52 moves along the T-shaped slot 51, and the transfer box 22 is driven to move below the communication opening 211. At the same time, the shutter assembly 4 releases the shutter of the communication port 211, and the waste storage box 21 and the transfer box 22 are communicated with each other. Facilitating the entry of the fiber waste into the transition box 22 through the communication port 211.

As shown in fig. 3, the shutter assembly 4 includes a shutter plate 41 and a connection spring 42, and the shutter plate 41 is horizontally located above the communication port 211 to shield the communication port 211. The extension and contraction direction of the connection spring 42 is the same as the longitudinal direction of the T-shaped slot 51. One end of the connection spring 42 is fixedly connected to the side wall of the shutter 41, and the other end is fixedly connected to the inner wall of the waste holding tank 21.

As shown in fig. 3, a guide rod 412 is connected to one side of the shielding plate 41 close to the connection spring 42, and the longitudinal direction of the guide rod 412 is the same as the extending and contracting direction of the connection spring 42. One end of the guide rod 412 is fixedly connected to the inner wall of the waste holding box 21, and the other end is inserted into the shutter 41 and slidably connected to the shutter 41.

As shown in fig. 3, a push plate is vertically disposed in the communication port 211, a top end of the push plate is fixedly connected to the shielding plate 41, and the push rod 411 is located at one end of the shielding plate 41 far away from the connecting spring 42. The bottom end of the push lever 411 is lower than the bottom surface of the waste holding tank 21.

As shown in fig. 3, a fixing rod 212 is connected to a side wall of the waste holding tank 21, and the fixing rod 212 is located on a side away from the connecting spring 42. The fixing rod 212 is vertically disposed, a top end of the fixing rod 212 is rotatably connected to a sidewall of the waste holding tank 21, and a bottom end of the fixing rod 212 is lower than a bottom surface of the waste holding tank 21.

As shown in fig. 4, the waste holding tank 21 is provided with a guide plate 221 inclined therein, and the guide plate 221 is positioned above the guide bar 412. The top end of the material guide plate 221 is fixedly connected with the top of the waste temporary storage box 21, and the bottom end of the material guide plate 221 is located above the communication port 211.

The T-shaped fixture block 52 is inserted into the T-shaped fixture slot 51 from one end of the T-shaped fixture slot 51, and at this time, the side wall of the transit box 22 abuts against the push rod 411. The transfer box 22 is pushed to move in the longitudinal direction of the T-shaped groove, so that the push rod 411 moves in the direction approaching the connection spring 42, the connection spring 42 is compressed, the shielding plate 41 releases the shielding of the communication port 211, and the waste temporary storage box 21 and the transfer box 22 are communicated. The fixing lever 212 is rotated so that the bottom end of the fixing lever 212 abuts on the side of the transfer case 22 away from the push lever 411. The fiber waste dropped into the waste storage box 21 slides along the guide plate 221 into the communication port 211 and drops into the transfer box 22.

The utility model discloses a use as follows:

when the T-shaped clamping block 52 is used, firstly, the T-shaped clamping block 52 is clamped into the T-shaped clamping groove 51 from one end of the T-shaped clamping groove 51, the transfer box 22 is pushed to enable the T-shaped clamping block 52 to move along the T-shaped clamping groove 51 and be located below the communication opening 211; then, the fixing rod 212 is rotated to make the bottom of the fixing rod 212 abut against the side wall of the transfer case 22; then, stripping a coating layer of the optical fiber, wiping the optical fiber with absorbent cotton dipped with alcohol, placing the optical fiber into the optical fiber fixing groove 111, enabling the bare optical fiber to be placed on the lower anti-skid pad 321 straightly, and meanwhile, positioning the end of the optical fiber right above the waste material port; pressing the pressing plate 12 downwards to make the upper magnetic stripe 121 and the lower magnetic stripe 113 attract each other, and at this time, the upper anti-slip pad 311 is tightly abutted to the lower anti-slip pad 321 to tightly press and fix the bare optical fiber; finally, the slider 114 is pushed to move in a direction approaching the optical fiber, so that the optical fiber is cut by the cutter blade 112, the pressing plate 12 is lifted, and the cut optical fiber waste directly falls into the waste temporary storage box 21 and then enters the transfer box 22 through the communication port 211. Thereby reduce on the optic fibre waste material drops table surface, reduce the condition that operating personnel was pricked by optic fibre waste material, security when improving the cutting optic fibre.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides an optical fiber cutter, includes base (1), is equipped with platform (11) on base (1), has seted up optic fibre fixed slot (111) on platform (11), and the one end of optic fibre fixed slot (111) is equipped with cutting knife (112), and it has clamp plate (12) to articulate on platform (11), and clamp plate (12) are located the top of cutting knife (112), its characterized in that: be connected with garbage collection device (2) in one side that is close to cutting knife (112), garbage collection device (2) are including open-top's waste material temporary storage case (21) and transfer case (22), waste material temporary storage case (21) and platform (11) fixed connection, transfer case (22) can be dismantled with the bottom of waste material temporary storage case (21) and be connected, intercommunication mouth (211) have been seted up to the bottom of waste material temporary storage case (21), intercommunication mouth (211) and transfer case (22) intercommunication, be equipped with between transfer case (22) and the waste material temporary storage case (21) and shelter from subassembly (4) that shelter from intercommunication mouth (211) temporarily.

2. An optical fiber cleaver according to claim 1, wherein: be provided with joint subassembly (5) between waste material temporary storage case (21) and transit case (22), joint subassembly (5) are including T type draw-in groove (51) and T type fixture block (52), and the bottom surface at waste material temporary storage case (21) is seted up to T type draw-in groove (51) level, T type fixture block (52) and transit case (22) fixed connection, and T type fixture block (52) are gone into in T type draw-in groove (51) along T type draw-in groove (51) length direction from the one end card of T type draw-in groove (51).

3. An optical fiber cleaver according to claim 2, wherein: shelter from subassembly (4) including shielding plate (41) and connecting spring (42), shielding plate (41) level is located on intercommunication mouth (211) in order to shelter from intercommunication mouth (211), the flexible direction of connecting spring (42) is the same with the length direction of T type draw-in groove (51), the one end of connecting spring (42) and the inner wall fixed connection of waste material temporary storage case (21), the other end and shielding plate (41) fixed connection, the bottom surface fixedly connected with of shielding plate (41) promotes catch bar (411) that shielding plate (41) removed, catch bar (411) are located shielding plate (41) and keep away from the one end of connecting spring (42).

4. An optical fiber cleaver according to claim 3, wherein: a guide rod (412) is arranged between the shielding plate (41) and the waste temporary storage box (21), the length direction of the guide rod (412) is the same as the telescopic direction of the connecting spring (42), one end of the guide rod (412) is fixedly connected with the inner wall of the waste temporary storage box (21), and the other end of the guide rod (412) is inserted into the shielding plate (41) and is in sliding connection with the shielding plate (41).

5. An optical fiber cleaver according to claim 3, wherein: the side wall of the waste temporary storage box (21) is provided with a fixing rod (212), the fixing rod (212) is positioned on one side far away from the connecting spring (42), the top end of the fixing rod (212) is rotatably connected with the waste temporary storage box (21), and the bottom end of the fixing rod (212) is lower than the bottom surface of the waste temporary storage box (21).

6. An optical fiber cleaver according to claim 5, wherein: a material guide plate (221) is arranged above the guide rod (412), the top end of the material guide plate (221) is fixedly connected with the top of the waste temporary storage box (21), and the bottom end of the material guide plate (221) inclines downwards and is positioned above the communication port (211).

7. An optical fiber cleaver according to claim 1, wherein: the two sides of the cutting direction of the cutting knife (112) are provided with pressing assemblies (3) for pressing optical fibers, each pressing assembly (3) comprises an upper pressing pad (31) and a lower pressing pad (32), the upper pressing pads (31) are fixedly connected with the bottom surface of the pressing plate (12), the lower pressing pads (32) are positioned right below the upper pressing pads (31), and the lower pressing pads (32) are fixedly connected with the top surface of the platform (11).

8. An optical fiber cleaver according to claim 7, wherein: an upper antiskid pad (311) is bonded on the upper pressure pad (31), and a lower antiskid pad (321) is bonded on the lower pressure pad (32).