CN112057766A

CN112057766A - Climbing device

Info

Publication number: CN112057766A
Application number: CN202010965233.0A
Authority: CN
Inventors: 冯娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-12-11

Abstract

The invention discloses a climbing device, particularly relates to the technical field of machinery, and comprises a lifting working rod, wherein a plurality of tool mounting holes are sequentially formed in the top of the lifting working rod, two sides of the bottom of the lifting working rod are respectively and fixedly provided with a lifting U-shaped pulley, a first tension spring buckle, a rope collecting wheel and a lower climbing connecting frame, a tension spring is connected onto the tension spring buckle, a pushing spring is movably sleeved on the outer side of the middle of the lifting working rod, a spring telescopic dustproof sleeve is movably sleeved on the outer side of the pushing spring, and spring clamping pieces are arranged at the top end and the bottom end of the pushing spring. The climbing device is provided with the plurality of groups of climbing frames, matched with the tension springs, the pushing springs and other components, and pulled by the ropes, so that the climbing device is insulated and safe, electric shock casualty accidents are avoided, falling accidents of high-altitude operation personnel are avoided, the climbing device is simple in structure and not easy to damage, has a full mechanical structure, is environment-friendly, does not waste energy, is light in size, occupies small working space, and is convenient to carry.

Description

Climbing device

Technical Field

The invention relates to the technical field of machinery, in particular to a climbing device.

Background

The wrench is a common mounting and dismounting tool, and is a manual tool for screwing bolts, screws, nuts and other screw threads to tightly hold open or trepanning fasteners of the bolts or nuts by utilizing the lever principle. The wrench is typically made of structural steel of carbon or alloy material.

The wrench is generally provided with an opening or a trepan for holding the bolt or the nut at one end or both ends of the handle portion, and when the wrench is used, the bolt or the nut can be screwed by applying an external force to the handle portion along the rotation direction of the thread.

However, in actual use, there are still many disadvantages, for example, the dressing change device is often used in medical institutions such as hospitals, and generally, when dressing change is performed, a nurse takes a medicine and changes the dressing, and the dressing change device provided in the above technical scheme is in actual use.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides the climbing device, the climbing device is pulled by a rope by arranging a plurality of groups of climbing frames and matching with components such as a tension spring, a pushing spring and the like, the climbing device is insulated and safe, electric shock casualty accidents are avoided, falling accidents of high-altitude operation personnel are avoided, the climbing device is simple in structure and not easy to damage, has a full mechanical structure, is environment-friendly, does not waste energy, is light in size, occupies a small working space and is convenient to carry.

In order to achieve the purpose, the invention provides the following technical scheme: a climbing device comprises a lifting working rod, wherein a plurality of tool mounting holes are sequentially formed in the top of the lifting working rod, two sides of the bottom of the lifting working rod are respectively and fixedly provided with a lifting U-shaped pulley, a first tension spring buckle head, a rope collecting wheel and a lower climbing connecting frame, a tension spring is connected onto the tension spring buckle head, a pushing spring is movably sleeved on the outer side of the middle of the lifting working rod, a spring telescopic dustproof sleeve is movably sleeved on the outer side of the pushing spring, and spring clamping pieces are arranged at the top end and the bottom end of the pushing spring;

the top of the spring clamping piece at the top end of the pushing and lifting spring is provided with a sliding shaft sleeve, one side of the sliding shaft sleeve is provided with a rope binding buckle head, the other side of the sliding shaft sleeve is provided with a shaft sleeve connecting hole, an upper-layer climbing frame is sleeved outside the sliding shaft sleeve, the upper-layer climbing frame is also provided with a sliding shaft sleeve mounting hole, the bottom of one end of the upper-layer climbing frame is fixedly provided with an upper-layer climbing frame U-shaped pulley, the other end of the upper-layer climbing frame is fixedly provided with an upper holding connecting rod, two ends of the upper holding connecting rod are both provided with upper holding connecting holes, and an upper holding ring is inserted into the;

the lower end connecting hole is formed in the lower climbing connecting frame, the lower climbing connecting frame is movably connected with a lower layer climbing frame, the lower layer climbing frame is connected with a lower holding connecting rod, a second spring buckle head is arranged on the lower holding connecting rod, a lower holding connecting hole is formed in the lower holding connecting rod, and a lower holding ring is inserted in the lower holding connecting hole.

In a preferred embodiment, go up the straining ring and all set up to "U" font with lower straining ring, the equal fixedly connected with rope of the bend of going up straining ring and lower straining ring is tied up and is buckled, the outside cover of bend of lower straining ring is equipped with the auxiliary wheel, be connected with the rope that rises and descend the rope on the rope collecting wheel.

In a preferred embodiment, the ascending rope bottom end is connected with the rope collecting wheel, the ascending rope is sequentially attached to the outer walls of the ascending U-shaped pulley and the upper-layer climbing frame U-shaped pulley, the top end of the ascending rope is connected with the rope binding buckle head, the descending rope bottom end is connected with the rope collecting wheel, and the descending rope is attached to the outer wall of the auxiliary wheel, and the top end of the descending rope is connected with the rope binding buckle of the upper clasping ring.

In a preferred embodiment, the auxiliary wheel is provided with auxiliary wheel positioning pieces on two sides, the bent portion of the lower clasping ring is further provided with auxiliary wheel positioning holes, the auxiliary wheel positioning buckles are arranged inside the auxiliary wheel positioning holes, the auxiliary wheel positioning pieces are sleeved outside the lower clasping ring, and the auxiliary wheel positioning holes are formed in two sides of the auxiliary wheel.

In a preferred embodiment, the first tension spring buckle head and the ascending U-shaped pulley are symmetrically arranged through the ascending working rod, the lower climbing frame is arranged under the first tension spring buckle head, the rope collecting wheel is arranged under the ascending U-shaped pulley, a connecting hole is formed in the lower climbing frame, the lower climbing frame is movably connected with the lower climbing frame through a lower end connecting hole, a connecting hole and a screw, the lower climbing frame can freely swing upwards, and the lower climbing frame can only downwards form ninety degrees with the ascending working rod.

In a preferred embodiment, both ends of the upper and lower clasping rings are provided with mounting positioning holes, joint connecting and positioning screws penetrate through the inside of the mounting hole of the sliding shaft sleeve and the inside of the lower end connecting hole, and clasping ring buckles are arranged inside the mounting positioning holes.

In a preferred embodiment, the sliding shaft sleeve is sleeved outside the top end of the lifting working rod, and the joint connection positioning screw in the mounting hole of the sliding shaft sleeve sequentially penetrates through the mounting hole of the sliding shaft sleeve and the connecting hole of the shaft sleeve.

In a preferred embodiment, the bottom end of the tension spring is connected with a second tension spring buckle head, and the upper holding connecting rod is obliquely arranged with the upper layer climbing frame.

In a preferred embodiment, the outer wall of the bent part of the upper holding ring, the outer wall of the lower holding ring, the outer wall of the upper holding connecting rod and the outer wall of the lower holding connecting rod are coated with shock-proof and anti-skid glue.

The invention has the technical effects and advantages that:

1. the climbing device is driven by the rope through the multiple groups of climbing frames matched with components such as the tension spring, the pushing spring and the like, so that the climbing device is insulated and safe, electric shock casualty accidents are avoided, falling accidents of high-altitude operation personnel are avoided, the climbing device is simple in structure and not easy to damage, has a full mechanical structure, is environment-friendly, does not waste energy, is light in size, occupies small working space and is convenient to carry;

2. the fruit picker can be operated by one person, is time-saving, labor-saving and labor-saving, and can be used for collecting fruits by the collector arranged on the lifting working rod when the high-altitude fruits are picked, so that the waste caused by actual scattering is greatly reduced, and the production benefit is improved;

3. the product has wide application and large expandable space, different tools can be replaced for different working requirements for operation, and different clasping rings can be replaced according to different shapes of climbing objects.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic top view of the present invention.

Fig. 4 is a schematic structural view of a part of the elevating work bar of the present invention.

Fig. 5 is a partial structural view of the upper climbing frame of the present invention.

Fig. 6 is a schematic view showing a partial structure of the sliding bush according to the present invention.

Fig. 7 is a schematic structural view of the upper clasp of the present invention.

Fig. 8 is a schematic view of the structure of the lower clasp of the present invention.

Fig. 9 is a schematic diagram of a detailed structure a in fig. 1 according to the present invention.

Fig. 10 is a schematic diagram of a detailed structure at B in fig. 3 according to the present invention.

FIG. 11 is a schematic view of the positioning plate of the auxiliary wheel of the present invention.

Fig. 12 is a schematic view of the auxiliary wheel positioning buckle structure of the present invention.

Fig. 13 is a schematic view of a clasp buckle structure of the present invention.

The reference signs are: 1 lifting working rod, 2 tool mounting holes, 3 lifting U-shaped pulleys, 4 first tension spring buckle heads, 5 rope collecting wheels, 6 lower climbing connection frames, 7 tension springs, 8 pushing springs, 9 spring telescopic dust covers, 10 spring clamping pieces, 11 sliding shaft sleeves, 12 rope binding buckle heads, 13 shaft sleeve connection holes, 14 upper climbing frames, 15 sliding shaft sleeve mounting holes, 16 upper climbing frame U-shaped pulleys, 17 upper clamping connection rods, 18 upper clamping connection holes, 19 upper clamping rings, 20 lower end connection holes, 21 lower climbing frames, 22 lower clamping connection rods, 23 second spring buckle heads, 24 lower clamping connection holes, 25 lower clamping rings, 26 rope binding buckles, 27 auxiliary wheels, 28 lifting ropes, 29 descending ropes, 30 auxiliary wheel positioning pieces, 31 auxiliary wheel positioning holes, 32 auxiliary wheel positioning buckles, 33 mounting positioning holes, 34 joint connection positioning screws and 35 clamping ring buckles.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The climbing device shown in fig. 1-10 comprises a lifting working rod 1, wherein a plurality of tool mounting holes 2 are sequentially formed in the top of the lifting working rod 1, a lifting U-shaped pulley 3, a first tension spring buckle 4, a rope collecting wheel 5 and a lower climbing connecting frame 6 are fixedly arranged on two sides of the bottom of the lifting working rod 1 respectively, a tension spring 7 is connected to the buckle of the tension spring 7, a pushing spring 8 is movably sleeved on the outer side of the middle of the lifting working rod 1, a spring telescopic dustproof sleeve 9 is movably sleeved on the outer side of the pushing spring 8, and spring clamping pieces 10 are arranged at the top end and the bottom end of the pushing spring 8;

the top of a spring clamping piece 10 at the top end of the pushing spring 8 is provided with a sliding shaft sleeve 11, one side of the sliding shaft sleeve 11 is provided with a rope binding buckle head 12, the other side of the sliding shaft sleeve 11 is provided with a shaft sleeve connecting hole 13, an upper-layer climbing frame 14 is sleeved outside the sliding shaft sleeve 11, the upper-layer climbing frame 14 is also provided with a sliding shaft sleeve mounting hole 15, the bottom of one end of the upper-layer climbing frame 14 is fixedly provided with an upper-layer climbing frame U-shaped pulley 16, the other end of the upper-layer climbing frame 14 is fixedly provided with an upper holding connecting rod 17, two ends of the upper holding connecting rod 17 are both provided with upper holding connecting holes 18, and an upper holding ring 19 is inserted into the upper holding connecting;

the lower climbing connecting frame 6 is provided with a lower end connecting hole 20, the lower climbing connecting frame 6 is movably connected with a lower layer climbing frame 21, the lower layer climbing frame 21 is connected with a lower holding connecting rod 22, the lower holding connecting rod 22 is provided with a second spring buckle 23, the lower holding connecting rod 22 is provided with a lower holding connecting hole 24, and a lower holding ring 25 is inserted into the lower holding connecting hole 24;

the upper clasping ring 19 and the lower clasping ring 25 are both arranged in a U shape, the bent parts of the upper clasping ring 19 and the lower clasping ring 25 are both fixedly connected with rope binding buckles 26, the outer part of the bent part of the lower clasping ring 25 is sleeved with an auxiliary wheel 27, and the rope collecting wheel 5 is connected with an ascending rope 28 and a descending rope 29;

the rope 28 bottom that rises is connected with rope collecting wheel 5, the rope 28 that rises is connected with the outer wall laminating and the top of ascending U type pulley 3 and upper climbing frame U type pulley 16 in proper order and is tied up the rope discount 12, the rope 29 bottom that descends is connected with rope collecting wheel 5, the rope that descends 29 and auxiliary wheel 27 outer wall laminating and top are tied up with the rope of last cohesion ring 19 and are buckled 26 and be connected.

The implementation mode is specifically as follows: sleeving a boosting spring 8 outside a lifting working rod 1, sleeving a spring telescopic dustproof sleeve 9 outside the boosting spring 8, clamping the boosting spring 8 at the upper end and the lower end by using spring clamping pieces 10, positioning and locking the spring telescopic dustproof sleeve at the upper spring clamping piece and the lower spring clamping piece 10 by using screws, sleeving a sliding shaft sleeve 11 outside the lifting working rod 1, sleeving an upper climbing frame 14 outside the sliding shaft sleeve 11, aligning a sliding shaft sleeve mounting hole 15 on the upper climbing frame 14 with a hole site of a shaft sleeve connecting hole 13, penetrating through a hole site by using an articulated positioning screw 34 and locking by using a nut to fix the sliding shaft sleeve 11 with the upper climbing frame 14, sleeving an upper holding ring 19 on an object to be climbed, penetrating through an upper holding connecting hole 18 of the upper climbing frame 14 at the end part of the upper holding ring 19 and locking the upper holding ring from the outside by using a holding ring buckle 35, aligning a connecting hole on the lower climbing frame with a lower connecting hole site on a lower lifting connecting frame 6, the joint connection positioning screw 34 penetrates through a hole and is locked by a nut, the second tension spring 7 buckle head of the lower climbing frame is connected with the first tension spring buckle head 4 on the lifting working rod 1 by the tension spring 7, the auxiliary wheel 27 is arranged outside the bent part of the lower holding ring 25, the left side and the right side are locked by the auxiliary wheel positioning sheet 30 and are locked by the auxiliary wheel positioning buckle 32, the lower holding ring 25 is sleeved on an object to be climbed, then the end part of the lower holding ring 25 penetrates through the lower holding connecting hole 24 on the lower climbing frame 21 and is locked from the outside by the holding ring buckle 35, the ascending rope 28 penetrates through the upper end of the U-shaped pulley 16 of the upper climbing frame 14 from the right side to the left side, then penetrates through the lower end of the ascending U-shaped pulley 3 from the right side to the left side, finally upwards is bound on the rope buckle head 12 of the sliding shaft sleeve 11, the descending rope 29 is bound on the rope buckles 26 of the upper holding ring 19 and the lower holding ring 25, a small amount of rope moving space is reserved between the upper layer and the lower layer.

As shown in fig. 1 to 13, two sides of the auxiliary wheel 27 are provided with auxiliary wheel positioning pieces 30, a bent portion of the lower clasping ring 25 is further provided with an auxiliary wheel positioning hole 31, an auxiliary wheel positioning buckle 32 is arranged inside the auxiliary wheel positioning hole 31, the auxiliary wheel positioning pieces 30 are sleeved outside the lower clasping ring 25, and the auxiliary wheel positioning holes 31 are arranged on two sides of the auxiliary wheel 27;

the first tension spring buckle head 4 and the lifting U-shaped pulley 3 are symmetrically arranged through the lifting working rod 1, the lower climbing connecting frame 6 is arranged under the first tension spring buckle head 4, the rope collecting wheel 5 is arranged under the lifting U-shaped pulley 3, a connecting hole is formed in the lower climbing frame 21, the lower climbing frame 21 is movably connected with the lower climbing connecting frame 6 through a lower end connecting hole 20, a connecting hole and a screw, the lower climbing frame 21 can freely swing upwards, and the lower climbing frame 21 can only form ninety degrees with the lifting working rod 1 downwards;

mounting positioning holes 33 are formed in the two ends of the upper holding ring 19 and the lower holding ring 25, joint connecting and positioning screws 34 penetrate through the sliding shaft sleeve mounting holes 15 and the lower end connecting holes 20, and holding ring buckles 35 are arranged inside the mounting positioning holes 33;

the sliding shaft sleeve 11 is sleeved outside the top end of the lifting working rod 1, the joint connection positioning screw 34 in the sliding shaft sleeve mounting hole 15 sequentially penetrates through the sliding shaft sleeve mounting hole 15 and the shaft sleeve connecting hole 13, the bottom end of the tension spring 7 is connected with the buckle head of the second tension spring 7, and the upper holding connecting rod 17 and the upper climbing frame 14 are obliquely arranged;

and the outer wall of the bent part of the upper holding ring 19, the outer wall of the lower holding ring 25, the outer wall of the upper holding connecting rod 17 and the outer wall of the lower holding connecting rod 22 are coated with shockproof and antiskid glue.

The implementation mode is specifically as follows: when the ascending rope 28 is pulled, the upper clasping ring 19 tightly clasps the object to be climbed, the lower-layer climbing frame 21 is lifted upwards, the auxiliary wheel 27 plays a role in assisting power, the lifting spring 8 is in a contraction state, when the rope is loosened, the upper clasping ring 19 is in a loosening state, the lifting spring 8 is in an expansion state and pushes the upper-layer climbing frame 14 upwards, the climbing effect is achieved by pulling the upper clasping ring and the lower clasping ring 19 and the object to be climbed, when the descending rope 29 is pulled, the upper clasping ring 25 and the lower clasping ring 25 are in a loosening state, the climbing device descends downwards, when the descending rope 29 is loosened, the lower-layer climbing frame 21 automatically clasps the object to be climbed under the action of the tension spring 7, the descending ring 25 stops descending, the climbing device is pulled by the upper clasping ring and the descending ring 25 to achieve the descending effect, when the climbing device is not required to be reused after the work is finished, the lower ends of, is tied on the rope collecting wheel 5 and then shakes the rope collecting wheel 5 to take the rope into the wheel.

The working principle of the invention is as follows:

referring to the attached drawings 1-13 of the specification, in operation, the upper enclasping ring 19 and the lower enclasping ring 25 are sleeved outside an object to be climbed, the upper enclasping ring 19 and the lower enclasping ring are connected with a device through a buckle structure, a plurality of groups of climbing frames are arranged, the climbing frames are matched with components such as a tension spring 7 and a push-up spring 8, a rope is used for pulling the climbing device, insulation and safety are achieved, electric shock casualty accidents are avoided, and falling accidents of high-altitude operation personnel are avoided.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. A climbing device comprises a lifting working rod (1), and is characterized in that a plurality of tool mounting holes (2) are sequentially formed in the top of the lifting working rod (1), two sides of the bottom of the lifting working rod (1) are respectively and fixedly provided with a lifting U-shaped pulley (3), a first tension spring buckle (4), a rope collecting wheel (5) and a lower climbing connecting frame (6), the tension spring (7) buckle is connected with a tension spring (7), a lifting spring (8) is movably sleeved on the outer side of the middle of the lifting working rod (1), a spring telescopic dustproof sleeve (9) is movably sleeved on the outer side of the lifting spring (8), and spring clamping pieces (10) are arranged at the top end and the bottom end of the lifting spring (8);

the top of a spring clamping piece (10) at the top end of the pushing spring (8) is provided with a sliding shaft sleeve (11), one side of the sliding shaft sleeve (11) is provided with a rope binding buckle head (12) and the other side of the sliding shaft sleeve is provided with a shaft sleeve connecting hole (13), an upper-layer climbing frame (14) is sleeved outside the sliding shaft sleeve (11), the upper-layer climbing frame (14) is further provided with a sliding shaft sleeve mounting hole (15), the bottom of one end of the upper-layer climbing frame (14) is fixedly provided with an upper-layer climbing frame U-shaped pulley (16), the other end of the upper-layer climbing frame (14) is fixedly provided with an upper holding connecting rod (17), two ends of the upper holding connecting rod (17) are both provided with upper holding connecting holes (18), and an upper holding ring (19) is inserted into the upper holding connecting holes (;

lower extreme connecting hole (20) have been seted up on lower climbing link (6), lower climbing link (6) swing joint has lower floor climbing frame (21), lower floor climbing frame (21) are connected with down and hold connecting rod (22), hold tightly and be equipped with second spring buckle head (23) down on connecting rod (22), hold tightly connecting rod (22) down and seted up down and hold tightly connecting hole (24), it has lower lock ring (25) to hold tightly to peg graft in connecting hole (24) down.

2. A climbing device according to claim 1, wherein: go up and embrace ring (19) and embrace under with and encircle (25) and all set up to "U" font, go up and embrace ring (19) and embrace the equal fixedly connected with rope of the bend of ring (25) down and tie up knot (26), the outside cover of bend of ring (25) is equipped with auxiliary wheel (27) down, be connected with ascending rope (28) and decline rope (29) on rope collection wheel (5).

3. A climbing device according to claim 2, wherein: the rope that rises (28) bottom is connected with rope collection wheel (5), the rope that rises (28) in proper order with the outer wall laminating and the top of ascending U type pulley (3) and upper climbing frame U type pulley (16) be connected with rope binding buckle head (12), the rope that descends (29) bottom is connected with rope collection wheel (5), it is connected with rope binding buckle (26) of last cohesion ring (19) to descend rope (29) and auxiliary wheel (27) outer wall laminating and top.

4. A climbing device according to claim 2, wherein: auxiliary wheel locating piece (30) are equipped with to auxiliary wheel (27) both sides, auxiliary wheel locating hole (31) have still been seted up to the bend of embracing tight ring (25) down, auxiliary wheel locating hole (31) inside is equipped with auxiliary wheel location buckle (32), the outside of embracing tight ring (25) is located down to auxiliary wheel locating piece (30) cover, auxiliary wheel locating hole (31) set up in the both sides of auxiliary wheel (27).

5. A climbing device according to claim 1, wherein: first extension spring discount (4) set up through lift work pole (1) symmetry with rising U type pulley (3), climb link (6) down and set up under first extension spring discount (4), rope collection wheel (5) set up under rising U type pulley (3), be equipped with the connecting hole on lower floor's climbing frame (21), lower floor's climbing frame (21) are through lower extreme connecting hole (20), connecting hole and screw and lower climbing link (6) swing joint.

6. A climbing device according to claim 1, wherein: go up the both ends of embracing clasp (19) and embracing clasp (25) down and all be equipped with installation locating hole (33), articulated connection set screw (34) have all been run through to the inside of slip axle sleeve mounting hole (15) and lower extreme connecting hole (20), the inside of installation locating hole (33) is equipped with embraces clasp buckle (35).

7. A climbing device according to claim 6, wherein: the outside on lift work pole (1) top is located to slip axle sleeve (11) cover, articulated set screw (34) in slip axle sleeve mounting hole (15) run through slip axle sleeve mounting hole (15) and axle sleeve connecting hole (13) in proper order.

8. A climbing device according to claim 1, wherein: the bottom end of the tension spring (7) is connected with the buckle head of the second tension spring (7), and the upper holding connecting rod (17) and the upper climbing frame (14) are obliquely arranged.

9. A climbing device according to claim 2, wherein: and the outer wall of the bent part of the upper holding ring (19), the outer wall of the lower holding ring (25), the outer wall of the upper holding connecting rod (17) and the outer wall of the lower holding connecting rod (22) are coated with shockproof and antiskid glue.