An installation support for a bagged pile construction

Abstract

This invention discloses an installation bracket for geotextile bag pile construction, comprising an installation unit, including a drive assembly, a rotating assembly and a tensioning assembly respectively connected to the drive assembly, a clamping assembly connected to the tensioning assembly, and a horizontal moving assembly connected to the rotating assembly. The beneficial effects of this invention are that it not only enables switching between two geotextile bag piles within a short time (i.e., continuing pouring before the initial setting of the concrete of the previous geotextile bag pile), ensuring stable and uniform filling of the geotextile bag and reducing the risk of damage caused by excessive expansion of the geotextile bag during single pouring, thus minimizing construction delays, but also, when the motor-driven rotating assembly is at its left or right extreme point, the steel cable is lifted and taut, while the third slider is pulled up, causing the two clamps to move closer together to clamp and fix the pouring pipe. This allows for mechanical replacement of manual pouring, further reducing occupational hazards (occupational arm tremor / arm vibration disease) caused by manual hand pouring and saving labor costs.

Description

Technical Field

[0001] This invention relates to the field of geotextile bag pile construction technology, and in particular to an installation bracket for geotextile bag pile construction. Background Technology

[0002] Roads, railways, and other infrastructure typically include structures such as bridges, roadbeds, and culverts. After the roads are opened to traffic, these structures may experience varying degrees of settlement due to vehicle overloading or environmental pollution, severely impacting their stability and posing safety hazards. To ensure the normal operation of the roads, it is necessary to repair and reinforce these structures, typically using concrete piles with geotextiles.

[0003] However, most existing technologies involve one-time stamping and grouting of the geotextile piles, which can easily lead to excessive expansion and damage during the grouting process. Furthermore, the outer wall of the filled geotextile pile may adhere to the strata, or even the rock strata, and may be punctured or scratched. This can cause the geotextile piles to break, significantly reducing the efficiency of cement grouting. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above or prior art, where the installation location of the geotextile bag piles is relatively deep, the one-time pressing and grouting of the arranged geotextile bag piles during construction can easily lead to excessive expansion of the geotextile bag piles during grouting, resulting in damage and a significant reduction in the efficiency of cement grouting, this invention is proposed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an installation bracket for construction of geotextile bags, comprising an installation unit, including a drive assembly, a rotation assembly and a tension assembly respectively connected to the drive assembly, a clamping assembly connected to the tension assembly, and a horizontal movement assembly connected to the rotation assembly.

[0007] As a preferred embodiment of the installation bracket for the construction of geotextile bags according to the present invention, the drive assembly includes a placement plate, a motor fixedly disposed on the upper surface of the placement plate, a first fixing seat fixedly disposed on the upper surface of the placement plate, a first rotating shaft fixedly connected to the motor at one end, a first turntable fixedly connected to the other end of the first rotating shaft, a first drive rod fixedly connected to the first turntable, and a driven member connected to the first drive rod.

[0008] As a preferred embodiment of the installation bracket for the construction of geotextile bags, the driven component includes a first driven rod connected to the first driving rod via a bushing, a second turntable fixedly connected to one end of the first driven rod, a second fixed seat fixedly disposed on the upper surface of the placement plate, and a second rotating shaft passing through the second fixed seat.

[0009] As a preferred embodiment of the installation bracket for the construction of geotextile bags according to the present invention, the rotating component includes two support frames, a rotating plate connected to the support frames, an open plate rotatably connected to the rotating plate, a connecting plate rotatably connected to the open plate, and a square plate fixedly connected to the connecting plate.

[0010] As a preferred embodiment of the installation bracket for the construction of geotextile bags, the rotating plate includes an arc-shaped groove and a circular groove disposed on the rotating plate, a driven shaft disposed inside the circular groove, and a first slider slidably disposed inside the arc-shaped groove.

[0011] As a preferred embodiment of the installation bracket for the construction of geotextile bags, the horizontal moving component includes an I-shaped groove fixedly disposed on the surface of the rotating plate, a second slider slidably connected to the I-shaped groove, a connecting rod passing through the second slider, and a first connecting block fixedly connected to one end of the connecting rod.

[0012] As a preferred embodiment of the installation bracket for the construction of geotextile bags, the clamping assembly includes a clamping frame, trapezoidal blocks symmetrically slidably disposed on the clamping frame, a third slider slidably connected to both trapezoidal blocks, a second connecting block fixedly connected to the lower surface of the trapezoidal blocks, and a gripper fixedly connected to the second connecting block.

[0013] The third slider is equipped with symmetrical fixed posts.

[0014] As a preferred embodiment of the installation bracket for the construction of geotextile bags, the tensioning assembly includes a first protective tube fixedly connected to the upper surface of the third slider, a second protective tube fixedly disposed on the upper surface of the square plate, and a steel rope passing through both the first and second protective tubes.

[0015] The lower end of the first protective tube is fixedly connected to the symmetrically arranged fixed columns through a connecting pipe.

[0016] As a preferred embodiment of the installation bracket for the construction of geotextile bags, one end of the steel rope is fixedly connected to the third slider, and the other end is fixedly sleeved on one end of the first drive rod.

[0017] As a preferred embodiment of the installation bracket for the construction of geotextile bags, the two trapezoidal blocks are provided with inclined grooves symmetrically on their opposite sidewalls;

[0018] The third slider has protrusions on its two side walls.

[0019] The beneficial effects of this invention are as follows: This invention not only enables the switching and pouring of two formwork bags within a short time (i.e., continuing pouring before the initial setting of the concrete of the first formwork bag pile), allowing the formwork bag to be filled stably and evenly, reducing the damage caused by excessive expansion of the formwork bag due to one-time pouring and resulting in delays in the construction pouring progress, but also allows the steel rope to be lifted and taut when the motor-driven rotating component is at the left or right extreme point. At the same time, the third slider is pulled up, causing the two grippers to move closer to each other to clamp and fix the pouring pipe. This allows the pouring to be done mechanically instead of manually, further reducing occupational hazards (occupational arm tremor / arm vibration disease) caused by manual pouring and saving labor costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of an installation bracket used for geotextile bag pile construction.

[0022] Figure 2 This is a schematic diagram of the overall structure of an installation bracket used for geotextile bag pile construction from another perspective.

[0023] Figure 3 This is a front view of an installation bracket used for geotextile bag pile construction.

[0024] Figure 4 This is a top view of an installation bracket used for geotextile bag pile construction.

[0025] Figure 5 An installation bracket for use in the construction of geotextile bags. Figure 2 Enlarged view of part A in the image.

[0026] Figure 6 An installation bracket for use in the construction of geotextile bags. Figure 2 Enlarged view of part B in the image. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1

[0031] Reference Figures 1-6 This is the first embodiment of the present invention, which provides an installation bracket for the construction of geotextile bags, which can solve the problem that the geotextile bags are damaged due to excessive expansion during the one-time grouting process, resulting in a significant reduction in the efficiency of cement grouting.

[0032] Specifically, an installation bracket for construction of geotextile bags includes an installation unit 100, comprising a drive assembly 101, a rotation assembly 102 and a tension assembly 103 respectively connected to the drive assembly 101, a clamping assembly 104 connected to the tension assembly 103, and a horizontal movement assembly 105 connected to the rotation assembly 102.

[0033] Furthermore, the drive assembly 101 includes a placement plate 101a, a motor 101b fixedly disposed on the upper surface of the placement plate 101a, a first fixed seat 101c fixedly disposed on the upper surface of the placement plate 101a, a first rotating shaft 101d fixedly connected at one end to the motor 101b, a first turntable 101e fixedly connected to the other end of the first rotating shaft 101d, a first drive rod 101f fixedly connected to the first turntable 101e, and a driven member 101g connected to the first drive rod 101f. The first rotating shaft 101d passes through the first fixed seat 101c and its two ends are fixedly connected to the output end of the motor 101b and the first turntable 101e, respectively.

[0034] Furthermore, the driven member 101g includes a first driven rod 101g-1 connected to the first drive rod 101f via a bushing 101g-5, a second turntable 101g-2 fixedly connected to one end of the first driven rod 101g-1, a second fixed seat 101g-3 fixedly disposed on the upper surface of the placement plate 101a, and a second rotating shaft 101g-4 passing through the second fixed seat 101g-3.

[0035] It should be noted that the motor 101b drives the first rotating shaft 101d to rotate, the rotation of the first rotating shaft 101d drives the first turntable 101e to rotate, the rotation of the first turntable 101e drives the first drive rod 101f to rotate, the first drive rod 101f drives the first driven rod 101g-1 to rotate through the bushing, the first driven rod 101g-1 drives the second turntable 101g-2 to rotate, and the rotation of the second turntable 101g-2 drives the second rotating shaft 101g-4 to rotate.

[0036] Furthermore, the rotating assembly 102 includes two support frames 102a, a rotating plate 102b connected to the support frame 102a, an open plate 102c rotatably connected to the rotating plate 102b, a connecting plate 102d rotatably connected to the open plate 102c, and a square plate 102e fixedly connected to the connecting plate 102d.

[0037] Furthermore, the rotating plate 102b includes an arc-shaped groove 102b-1 and a circular groove 102b-2 disposed on the rotating plate 102b, a driven shaft 102b-3 disposed inside the circular groove 102b-2, and a first slider 102b-4 slidably disposed inside the arc-shaped groove 102b-1. The arc-shaped groove 102b-1 and the circular groove 102b-2 are concentrically arranged. The size of the first slider 102b-4 is adapted to the size of the arc-shaped groove 102b-1 and the opening size on the perforated plate 102c. One end of the first slider 102b-4 slides inside the arc-shaped groove 102b-1, and the other end is fixedly connected to the connecting plate 102d. At the same time, one end of the driven shaft 102b-3 is fixedly connected to the perforated plate 102c.

[0038] It should be noted that the second rotating shaft 101g-4 passes through the rotating plate 102b and is fixedly connected to the driven shaft 102b-3, so that the rotation of the motor 101b ultimately drives the driven shaft 102b-3 to rotate. The rotation of the driven shaft 102b-3 drives the perforated plate 102c to move within the arc groove 102b-1 with the driven shaft 102b-3 as the center.

[0039] Preferably, the rotation direction can be changed by the motor 101b to enable switching between two formwork piles that need to be poured in a short time, thereby reducing the adverse effects of excessive expansion of the formwork piles caused by excessive pouring volume.

[0040] Furthermore, the horizontal moving assembly 105 includes an I-shaped slide groove 105a fixedly disposed on the surface of the rotating plate 102b, a second slider 105b slidably connected to the I-shaped slide groove 105a, a connecting rod 105c passing through the second slider 105b, and a first connecting block 105d fixedly connected to one end of the connecting rod 105c, wherein the upper end of the connecting rod 105c is fixedly connected to the lower end of the square plate 102e.

[0041] It should be noted that the driven shaft 102b-3 drives the slot to rotate, causing the first slider 102b-4 to slide inside the arc-shaped groove 102b-1. The sliding of the first slider 102b-4 drives the connecting plate 102d to move, and the connecting plate 102d drives the square plate 102e to move, thereby enabling the second slider 105b to move horizontally on the I-shaped slide groove 105a via the connecting rod 105c.

[0042] Furthermore, the clamping assembly 104 includes a clamping frame 104a, trapezoidal blocks 104b symmetrically slidably disposed on the clamping frame 104a, a third slider 104c slidably connected to both trapezoidal blocks 104b, a second connecting block 104d fixedly connected to the lower surface of the trapezoidal blocks 104b, and a gripper 104e fixedly connected to the second connecting block 104d. The clamping frame 104a has openings on both symmetrical sides, and horizontal grooves are provided on the two inner walls symmetrically along the direction of the openings, so that the two trapezoidal blocks 104b can pass through the openings and move horizontally along the horizontal grooves.

[0043] The third slider 104c is symmetrically provided with fixed posts 104c-1, and the upper end of the third slider 104c is also provided with a lifting ring.

[0044] Furthermore, the tensioning assembly 103 includes a first protective tube 103a fixedly connected to the upper surface of the third slider 104c, a second protective tube 103b fixedly disposed on the upper surface of the square plate 102e, and a steel rope 103c passing through both the first protective tube 103a and the second protective tube 103b. The first protective tube 103a is sleeved on the lifting ring on the upper surface of the third slider 104c, and the other end of the first protective tube 103a is connected to the first connecting block 105d. The end of the second protective tube 103b near the first driving rod 101f is located directly above the first driving rod 101f. The second protective tube 103b has a certain redundant height from the upper end of the rotating plate 102b, so that when the rotating assembly 102 moves to the left or right extreme point, it is located above the rotating plate 102b.

[0045] It should be noted that in the original state, when the motor 101b is not started, the first slider 102b-4 is located at the apex of the arc groove 102b-1, while the third slider 104c is located at the bottom of the inclined groove 104b-1. At this time, the clamping assembly 104 is located at the highest point, and the gripper 104e is only used for the initial clamping and stabilization of the pipe during the pouring process. This ensures that the equipment is in a relatively high position during non-pouring periods, so as not to affect other work of the staff.

[0046] Preferably, the steel rope 103c is located directly above the first drive rod 101f, so that when the motor 101b drives the first slider 102b-4 to the bottom of both sides of the arc groove 102b-1, the steel rope 103c is in a taut state. This ensures that when switching to the pouring position, the gripper 104e is stably clamped, reducing vibration during the pouring process that could cause the pouring pipe to fall off and affect the construction progress.

[0047] The lower end of the first protective tube 103a is fixedly connected to the symmetrically arranged fixed column 104c-1 through a connecting tube.

[0048] Furthermore, one end of the steel rope 103c is fixedly connected to the third slider 104c, and the other end is fixedly sleeved on one end of the first drive rod 101f. The steel rope 103c is connected to the first drive rod 101f by clamps on both sides to limit the sliding of the steel rope 103c. At the same time, both ends of the steel rope 103c are fixedly connected to the lifting ring on the third slider 104c and the first drive rod 101f, respectively. The path of the steel rope 103c from bottom to top includes the first protective tube 103a, the first connecting block 105d, the connecting rod 105c, the square plate 102e, and the second protective tube 103b.

[0049] It should be noted that when the start motor 101b rotates, the rotating component 102 can move to the left or right extreme point of the arc groove 102b-1. At the same time, the rotation of the first drive rod 101f drives the steel rope 103c to move upward, thereby pulling the steel rope 103c upward and pulling the third slider 104c upward, so that the two trapezoidal blocks 104b move closer to each other and the gripper 104e retracts to clamp.

[0050] Preferably, when the rotating component 102 moves to the left or right extreme point of the arc groove 102b-1, the steel rope 103c is in a tensile state, which drives the gripper 104e to move closer and retract, thereby enabling the gripper 104e to fix and hold the pouring pipe, further ensuring that the structure can replace manual pouring.

[0051] Furthermore, the two trapezoidal blocks 104b are symmetrically provided with inclined grooves 104b-1 on their opposite sidewalls;

[0052] The third slider 104c has protrusions 104c-2 on its two side walls.

[0053] It should be noted that the protrusions 104c-2 of the third slider 104c are respectively inserted into the inclined grooves 104b-1 of the trapezoidal block 104b. The vertical upward movement is achieved through the tensioning component 103, which further drives the gripper 104e to retract and achieve the function of clamping and fixing.

[0054] In use, when the starting motor 101b rotates forward, it drives the first drive rod 101f to rotate. The first drive rod 101f makes a circular motion to the upper left, which simultaneously drives the first slider 102b-4 to rotate counterclockwise around the driven shaft 102b-3. When the first slider 102b-4 slides to the left pole, the horizontal moving unit moves along the I-shaped slide groove 105a to the left pole. Through the connecting rod, it drives the clamping assembly 104 to descend to the pouring position of the first mold bag pile. At this time, the steel rope 103c is tightened due to the upward circular motion of the first drive rod 101f. The third slider 104c is lifted to the upper end of the inclined groove 104b-1 (without detaching). The two trapezoidal blocks 104b move closer to each other, which drives the grippers 104e to move closer to each other, finally achieving stable clamping of the pouring pipe by the grippers 104e. When the motor 101b rotates to a certain angle, it can drive the rotating component 102 to move horizontally to the left pole. When the steel rope 103c is tightened, it drives the third slider 104c to rise, so that the two grippers 104e come closer to each other and achieve the gripper 104e clamping and fixing of the pouring pipe.

[0055] When the starting motor 101b reverses, it drives the first drive rod 101f to rotate. The first drive rod 101f makes a circular motion to the upper right, which simultaneously drives the first slider 102b-4 to rotate clockwise around the driven shaft 102b-3. When the first slider 102b-4 slides to the right pole, the horizontal moving unit moves along the I-shaped slide groove 105a to the right pole. Through the connecting rod, it drives the clamping assembly 104 to descend to the pouring position of the second mold bag pile. At this time, the steel rope 103c is tightened due to the upward circular motion of the first drive rod 101f. The third slider 104c is lifted to the upper end of the inclined groove 104b-1 (without detaching). The two trapezoidal blocks 104b approach each other, which drives the grippers 104e to approach each other, finally achieving stable clamping of the pouring pipe by the grippers 104e. When the motor 101b reverses to a certain angle, it can drive the rotating component 102 to move horizontally to the right pole. When the steel rope 103c is tightened, it drives the third slider 104c to rise, so that the two grippers 104e come closer to each other and achieve the gripper 104e clamping and fixing of the pouring pipe.

[0056] In summary, the beneficial effects of this invention are as follows: it not only enables the switching and pouring of two formwork piles within a short time (i.e., continuing pouring before the initial setting of the concrete of the first formwork pile), allowing the formwork to be filled stably and evenly, reducing the damage caused by excessive expansion of the formwork due to one-time pouring and resulting in delays in the construction pouring progress, but also, when the motor 101b drives the rotating component 102 to the left or right extreme point, the steel rope 103c is in a lifted and taut state, while the third slider 104c is pulled up, causing the two grippers 104e to move closer to each other, thereby clamping and fixing the pouring pipe with the grippers 104e. This realizes the use of machinery to replace manual pouring, further reducing occupational hazards (occupational arm tremor / arm vibration disease) caused by manual hand pouring, and saving labor costs.

[0057] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0058] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0059] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mounting bracket for use in a sock pile construction, characterized by: include, The mounting unit (100) includes a drive assembly (101), a rotation assembly (102) and a tension assembly (103) respectively connected to the drive assembly (101), a clamping assembly (104) connected to the tension assembly (103), and a horizontal movement assembly (105) connected to the rotation assembly (102). The drive assembly (101) includes a placement plate (101a), a motor (101b) fixedly disposed on the upper surface of the placement plate (101a), a first fixed seat (101c) fixedly disposed on the upper surface of the placement plate (101a), a first rotating shaft (101d) fixedly connected at one end to the motor (101b), a first turntable (101e) fixedly connected to the other end of the first rotating shaft (101d), a first drive rod (101f) fixedly connected to the first turntable (101e), and a driven member (101g) connected to the first drive rod (101f). The driven member (101g) includes a first driven rod (101g-1) connected to the first drive rod (101f) via a bushing (101g-5), a second turntable (101g-2) fixedly connected to one end of the first driven rod (101g-1), a second fixed seat (101g-3) fixedly disposed on the upper surface of the placement plate (101a), and a second rotating shaft (101g-4) passing through the second fixed seat (101g-3). The rotating assembly (102) includes two support frames (102a), a rotating plate (102b) connected to the support frame (102a), an open plate (102c) rotatably connected to the rotating plate (102b), a connecting plate (102d) rotatably connected to the open plate (102c), and a square plate (102e) fixedly connected to the connecting plate (102d). The rotating plate (102b) includes an arc-shaped groove (102b-1) and a circular groove (102b-2) disposed on the rotating plate (102b), a driven shaft (102b-3) disposed inside the circular groove (102b-2), and a first slider (102b-4) slidably disposed inside the arc-shaped groove (102b-1). The horizontal moving assembly (105) includes an I-shaped slide groove (105a) fixedly disposed on the surface of the rotating plate (102b), a second slider (105b) slidably connected to the I-shaped slide groove (105a), a connecting rod (105c) passing through the second slider (105b), and a first connecting block (105d) fixedly connected to one end of the connecting rod (105c). The clamping assembly (104) includes a clamping frame (104a), trapezoidal blocks (104b) symmetrically slidably disposed on the clamping frame (104a), a third slider (104c) slidably connected to both trapezoidal blocks (104b), a second connecting block (104d) fixedly connected to the lower surface of the trapezoidal blocks (104b), and a gripper (104e) fixedly connected to the second connecting block (104d). The tensioning assembly (103) includes a steel rope (103c) that passes through the connecting rod (105c) and the first connecting block (105d). One end of the steel rope (103c) is fixedly connected to the third slider (104c), and the other end is fixedly sleeved on one end of the first drive rod (101f).

2. The installation bracket for the construction of a bag cell pile according to claim 1, characterized in that: The stretching assembly (103) also includes a first protective tube (103a) fixedly connected to the upper surface of the third slider (104c), and a second protective tube (103b) fixedly disposed on the upper surface of the square plate (102e). The third slider (104c) is symmetrically provided with fixed posts (104c-1), and the lower end of the first protective tube (103a) is fixedly connected to the symmetrically provided fixed posts (104c-1) through a connecting tube.

3. The installation bracket for the construction of a bag cell pile according to claim 1 or 2, characterized in that: The two trapezoidal blocks (104b) are provided with symmetrical inclined grooves (104b-1) on their opposite sidewalls. The third slider (104c) has protrusions (104c-2) on its two side walls.

Images