Shield segment hoisting and transferring device

Abstract

The utility model provides a shield segment hoisting and transferring device, belongs to the technical field of hoisting tools, and aims to solve the problem that in the prior art, hoisting belts are likely to be fractured, so that segments fall from high altitude. Comprising a cross beam, the cross beam is sleeved with two suspension arms in a sliding mode, a hinge shaft is arranged above the cross beam, a lifting lug is arranged at the top of the hinge shaft, two connecting plates are hinged to the hinge shaft, and one ends of the two connecting plates are hinged to the two suspension arms respectively; an upper pressing plate, a pressure sensor and a lower bearing plate are sequentially arranged on the inner side of the suspension arm from top to bottom at intervals, the upper pressing plate can be driven by a driving device arranged on the suspension arm, and the pressure sensor is electrically connected with an alarm arranged on the cross beam; according to the utility model, the driving device can drive the upper pressing plate to press the top of the duct piece, so that the duct piece can be kept in a stable hoisting state, and the pressure sensor and the alarm are arranged, so that a worker can be reminded whether the duct piece is stably transferred in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoists, and in particular relates to a shield segment hoisting and transporting device. Background Art

[0002] In the conventional process of shield construction, segments play a vital role as the basic building blocks of the tunnel structure. They need to be carefully selected from the spacious ground yard and then lifted to the key hub of the tunnel wellhead. Here, the battery car, as a transportation medium, undertakes the important task of safely and efficiently transporting the segments to the shield machine operation area to ensure the continuity and efficiency of the construction process. This complex and delicate lifting process usually relies on the gantry crane carefully set up on the ground. With its powerful lifting capacity and stability, the gantry crane uses a special sling as a lifting tool to steadily lift the heavy segments and then gently place them on the battery car. The whole process is both precise and safe.

[0003] At present, in the technology-intensive field of shield machine construction, cost control has always been one of the core elements of project management. Therefore, as a key lifting accessory, the sling is frequently recycled, and its application scope has long surpassed the single segment lifting. However, this long-term and widespread use mode has undoubtedly aggravated the fatigue and wear of the sling. Over time, the strength and durability of the sling gradually decrease, thereby shortening its service life and posing a potential threat to the lifting safety of the segment. In extreme cases, severely worn slings may even break, causing the segment to fall from a high altitude, causing serious safety accidents.

[0004] In view of this, a complete set of regular sling inspection system has been established at the construction site. This system requires professionals to conduct a comprehensive and detailed inspection of the slings on a regular basis, evaluate their degree of wear and remaining service life, and decide whether to replace the slings based on the inspection results. Although this measure will undoubtedly help improve the level of construction safety and reduce potential safety hazards, it may also temporarily interrupt the construction process due to the replacement of slings, thereby affecting the overall construction progress and causing the scheduled construction nodes to be delayed. Therefore, how to find a balance between ensuring construction safety and maintaining construction progress has become an important issue that needs to be urgently resolved in the current shield machine construction field. Utility Model Content

[0005] In view of this, the utility model provides a shield segment lifting and transporting device to solve the problem in the prior art that the lifting belt used to transport the segments may break under extreme conditions, causing the segments to fall from a high altitude and causing serious safety accidents.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A shield segment lifting and transporting device comprises a crossbeam, on which a sliding sleeve is provided with two lifting arms, the two lifting arms are respectively located on both sides of the crossbeam, a hinge shaft is provided above the crossbeam, a lifting ear is provided on the top of the hinge shaft, two connecting plates are hinged on the hinge shaft, and the ends of the two connecting plates away from the hinge shaft are respectively hinged to the two lifting arms; an upper clamping plate, a pressure sensor and a lower supporting plate are sequentially arranged on the inner side of the lifting arm from top to bottom, the upper clamping plate can be driven by a driving device provided on the lifting arm to move up and down on the lifting arm, and one end of the upper clamping plate extends out of the through slot, and the pressure sensor is electrically connected to an alarm provided on the crossbeam.

[0008] In this technical solution, it should be noted that there is a herringbone structure between the two connecting plates, the crossbeam is made of steel, the two hanging arms are vertically arranged, and the two hanging arms are also made of steel; the pressure sensor and the alarm both adopt existing technologies, and when the pressure value sensed by the pressure sensor is greater than 0 and less than the set threshold value, the pressure sensor will send the sensing signal to the alarm, and the alarm will sound an alarm; in the specific implementation of this solution, when the hook is lifted by the gantry crane, the two connecting plates will rotate on the hinge shaft due to the action of gravity, that is, the two connecting plates will drive the two hanging arms to slide on the crossbeam, so that the two hanging arms are close to each other to clamp the pipe segment. At this time, the bottom of the pipe segment is located on the lower support plate, and the upper clamping plate is located above the pipe segment. The staff drives the upper clamping plate downward through the driving device, so that the upper The upper clamping plate presses the top of the segment to prevent the segment from rotating and causing tilting, thereby ensuring that the segment can maintain a stable lifting state. The segment can then be transported by the gantry crane. During the transportation process, if the alarm is activated and an alarm behavior occurs, it means that the clamping of the two booms on the segment has loosened, and the staff can take preventive measures according to the situation. In summary, in the utility model, the boom is used instead of the traditional sling, which can increase the life of the sling and reduce the probability of serious safety accidents caused by the segment falling from a high altitude. Secondly, in the utility model, the upper clamping plate can be driven by the set driving device to clamp the top of the segment, thereby ensuring that the segment can maintain a stable lifting state. Finally, the utility model can remind the staff in real time whether the transportation of the segment is stable through the set pressure sensor and alarm.

[0009] Preferably, a through slot is provided on the boom, and the through slot is arranged along the height direction of the boom. The upper pressure plate is slidably embedded in the through slot. The top of the upper pressure plate is provided with an inclined surface, and the inclined surface is inclined upward from the outer side of the through slot along the inner side of the through slot. The bottom of the upper pressure plate is provided with a spring connected to the bottom of the through slot; the driving device includes an abutment rod and a transverse movement assembly, the abutment rod is vertically arranged, the bottom of the abutment rod is in contact with the inclined surface, and the transverse movement assembly can drive the abutment rod to move along the width direction of the through slot.

[0010] In this technical solution, it should be noted that when it is necessary to press the top of the segment through the upper clamping plate, the abutment rod is driven by the transverse movement assembly to move toward the direction close to the inclined surface. At this time, the inclined surface is subjected to the lateral thrust of the abutment rod. Due to the setting of the inclined surface, the inclined surface will decompose the lateral thrust into the vertical direction of the upper clamping plate, thereby causing the upper clamping plate to move downward, and finally clamping the upper part of the segment. When the segment is transported to the destination, the staff will drive the abutment rod to reset through the transverse movement assembly. At this time, the upper clamping plate will also reset through the elastic force of the spring, preparing for the next segment transportation work.

[0011] Preferably, a bracket is provided at the top of the through slot, and the transverse movement assembly includes a screw and a movable seat, the screw is rotatably connected to the bracket, and the screw is arranged along the width direction of the through slot, the movable seat is slidably embedded in the through slot, the movable seat is threadedly connected to the screw, and the abutment rod is fixed at the bottom of the movable seat.

[0012] In this technical solution, it should be noted that the transverse movement assembly specifically includes a screw and a movable seat. When it is necessary to drive the upper clamping plate to move, the staff only needs to rotate the screw. After the screw rotates, it will drive the movable seat threadedly connected to it to move along the axial direction of the screw. The movement of the movable seat will then drive the abutment rod at its bottom to move.

[0013] Preferably, a hand wheel is provided at one end of the screw rod, and the hand wheel is located outside the through slot.

[0014] In this technical solution, it should be noted that the handwheel is a circular structure, and the setting of the handwheel makes it convenient for the worker to rotate the screw.

[0015] Preferably, the bottom of the abutment rod is rotatably connected to a roller, and the bottom of the roller is in contact with the inclined surface.

[0016] In this technical solution, it should be noted that the roller can reduce the friction between the bottom of the abutment rod and the upper clamping plate, thereby extending the service life of the abutment rod and the upper clamping plate.

[0017] Preferably, the bottom of the upper pressing plate and the top of the lower supporting plate are both arc-shaped surfaces adapted to the pipe segments.

[0018] In this technical solution, it should be noted that the provision of the arc-shaped surface can increase the contact area between the upper clamping plate and the lower support plate and the pipe segment, thereby enhancing the stabilizing effect on the pipe segment.

[0019] Preferably, elastic pads are respectively provided at the bottom of the upper pressing plate and the top of the lower supporting plate.

[0020] In this technical solution, it should be noted that the elastic pads provided can protect the pipe segments and prevent the upper clamping plates or the lower support plates from causing serious wear to the pipe segments.

[0021] Preferably, sliding blocks are provided on both sides of the upper pressing plate in the width direction, and sliding grooves are provided on both sides of the through groove in the width direction, and the sliding blocks are slidably embedded in the sliding grooves.

[0022] In this technical solution, it should be noted that the setting of the slider and the slide groove is used to limit the upper clamping plate, so that the upper clamping plate can only move along the height direction of the through groove.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0024] In the utility model, a boom is used instead of a traditional sling, which can increase the life of the sling and reduce the probability of serious safety accidents caused by the pipe segment falling from a high altitude. Secondly, in the utility model, the upper clamping plate can be driven by the arranged driving device to clamp the top of the pipe segment, thereby ensuring that the pipe segment can maintain a stable lifting state. Finally, the utility model can remind the staff in real time whether the transportation of the pipe segment is stable through the arranged pressure sensor and alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the hoisting and transporting device of the utility model when transporting pipe segments;

[0028] Figure 3 It is a three-dimensional structural schematic diagram of the boom of the utility model;

[0029] Figure 4 It is a top view three-dimensional structural schematic diagram of the boom of the utility model;

[0030] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure after cutting along AA;

[0031] Figure 6 for Figure 5 Schematic diagram of the three-dimensional structure of the upper and middle clamping plates and the transverse shifting assembly.

[0032] Among them: 1-connecting plate, 2-hinge shaft, 3-lifting ear, 4-cross beam, 5-lifting arm, 6-upper clamping plate, 7-lower supporting plate, 8-through slot, 9-pipe segment, 10-elastic pad, 11-slide slot, 12-spring, 13-bracket, 14-moving seat, 15-inclined surface, 16-screw, 17-handwheel, 18-slider, 19-abutment rod, 20-roller, 21-alarm, 22-pressure sensor. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0039] Implementation example Figure 1-Figure 6 As shown, the utility model embodiment discloses a shield segment 9 lifting and transporting device, including a crossbeam 4, on which two arms 5 are slidably sleeved, and the two arms 5 are respectively located on both sides of the crossbeam 4, and a hinge shaft 2 is provided above the crossbeam 4, and a lifting ear 3 is provided on the top of the hinge shaft 2, and two connecting plates 1 are hinged on the hinge shaft 2, and the ends of the two connecting plates 1 away from the hinge shaft 2 are respectively hinged to the two arms 5; the inner side of the arm 5 is sequentially spaced from top to bottom with an upper clamping plate 6, a pressure sensor 22 and a lower supporting plate 7, and the upper clamping plate 6 can be driven by a driving device provided on the arm 5 to move up and down on the arm 5, and one end of the upper clamping plate 6 extends out of the through slot 8, and the pressure sensor 22 is electrically connected to the alarm 21 provided on the crossbeam 4. It should be noted that the two connecting plates 1 are in a herringbone structure, the crossbeam 4 is made of steel, the two hanging arms 5 are vertically arranged, and the two hanging arms 5 are also made of steel; the pressure sensor 22 and the alarm 21 both adopt the existing technology, when the pressure value sensed by the pressure sensor 22 is greater than 0 and less than the set threshold value, the pressure sensor 22 will send the sensing signal to the alarm 21, and the alarm 21 will emit an alarm sound; in the specific implementation of this scheme, when the hook is lifted by the gantry crane, due to the action of gravity, the two connecting plates 1 will rotate on the hinge shaft 2, that is, the two connecting plates 1 will drive the two hanging arms 5 to slide on the crossbeam 4, so that the two hanging arms 5 are close to each other to clamp the pipe segment 9. At this time, the bottom of the pipe segment 9 is located on the lower supporting plate 7, and the upper clamping plate 6 is located above the pipe segment 9. The staff drives the upper clamping plate 6 to move downward through the driving device, so that The upper clamping plate 6 can press the top of the pipe segment 9 to prevent the pipe segment 9 from rotating and causing tilting, thereby ensuring that the pipe segment 9 can maintain a stable lifting state, and then the pipe segment 9 can be transported by the gantry crane. During the transportation process, if the alarm 21 is activated and an alarm behavior occurs, it means that the clamping of the two booms 5 on the pipe segment 9 has become loose, and the staff can take preventive measures according to the situation; in summary, in the utility model, the use of the boom 5 to replace the traditional sling can increase the life of the sling and reduce the probability of serious safety accidents caused by the pipe segment 9 falling from a high altitude. Secondly, in the utility model, the upper clamping plate 6 can be driven by the set driving device to press the top of the pipe segment 9, thereby ensuring that the pipe segment 9 can maintain a stable lifting state. Finally, the utility model can remind the staff in real time whether the transportation of the pipe segment 9 is stable through the set pressure sensor 22 and the alarm.

[0040] like Figure 5 and Figure 6As shown, in this embodiment, a through slot 8 is provided on the boom 5, and the through slot 8 is arranged along the height direction of the boom 5. The upper clamping plate 6 is slidably embedded in the through slot 8. A slope 15 is provided on the top of the upper clamping plate 6, and the slope 15 is inclined upward from the outside of the through slot 8 along the inside of the through slot 8. A spring 12 connected to the bottom of the through slot 8 is provided at the bottom of the upper clamping plate 6; the driving device includes an abutment rod 19 and a transverse movement assembly, the abutment rod 19 is vertically arranged, and the bottom of the abutment rod 19 is in contact with the slope 15, and the transverse movement assembly can drive the abutment rod 19 to move along the width direction of the through slot 8. It should be noted that when it is necessary to press the top of the pipe segment 9 through the upper clamping plate 6, the abutment rod 19 is driven by the transverse movement assembly to move toward the direction close to the inclined surface 15. At this time, the inclined surface 15 is subjected to the lateral thrust of the abutment rod 19. Due to the setting of the inclined surface 15, the inclined surface 15 will decompose the lateral thrust into the vertical direction of the upper clamping plate 6, thereby causing the upper clamping plate 6 to move downward, and finally press the upper part of the pipe segment 9. When the pipe segment 9 is transported to the destination, the staff will drive the abutment rod 19 to reset through the transverse movement assembly. At this time, the upper clamping plate 6 will also be reset by the elastic force of the spring 12, preparing for the next pipe segment 9 transportation work.

[0041] like Figure 5 and Figure 6 As shown, in this embodiment, a bracket 13 is provided at the top of the through slot 8, and the transverse movement assembly includes a screw 16 and a moving seat 14. The screw 16 is rotatably connected to the bracket 13, and the screw 16 is arranged along the width direction of the through slot 8. The moving seat 14 is slidably embedded in the through slot 8, and the moving seat 14 is threadedly connected to the screw 16. The abutment rod 19 is fixedly arranged at the bottom of the moving seat 14. It should be noted that the transverse movement assembly specifically includes the screw 16 and the moving seat 14. When it is necessary to drive the upper clamping plate 6 to move, the staff only needs to rotate the screw 16. After the screw 16 rotates, it will drive the moving seat 14 threadedly connected to it to move along the axial direction of the screw 16. The movement of the moving seat 14 will then drive the abutment rod 19 at its bottom to move.

[0042] like Figure 5 and Figure 6 As shown, in this embodiment, a hand wheel 17 is provided at one end of the screw rod 16, and the hand wheel 17 is located outside the through slot 8. It should be noted that the hand wheel 17 is a circular structure, and the setting of the hand wheel 17 is convenient for the worker to rotate the screw rod 16.

[0043] like Figure 5 and Figure 6 As shown, in this embodiment, the bottom of the abutment rod 19 is rotatably connected to a roller 20, and the bottom of the roller 20 contacts the inclined surface 15. It should be noted that the roller 20 can reduce the friction between the bottom of the abutment rod 19 and the upper clamping plate 6, thereby extending the service life of the abutment rod 19 and the upper clamping plate 6.

[0044] like Figure 3 As shown, in this embodiment, the bottom of the upper clamping plate 6 and the top of the lower supporting plate 7 are both arc-shaped surfaces adapted to the tube segment 9. It should be noted that the provision of the arc-shaped surface can increase the contact area between the upper clamping plate 6 and the lower supporting plate 7 and the tube segment 9, thereby improving the stabilizing effect on the tube segment 9.

[0045] like Figure 3 As shown, in this embodiment, the bottom of the upper pressing plate 6 and the top of the lower supporting plate 7 are respectively provided with elastic pads 10. It should be noted that the elastic pads 10 can protect the tube segments 9 and prevent the upper pressing plate 6 or the lower supporting plate 7 from causing serious wear to the tube segments 9.

[0046] like Figure 5 and Figure 6 As shown, in this embodiment, sliders 18 are provided on both sides of the width direction of the upper clamping plate 6, and slide grooves 11 are provided on both sides of the width direction of the through slot 8, respectively, and the sliders 18 are slidably embedded in the slide grooves 11. It should be noted that the sliders 18 and the slide grooves 11 are provided to limit the upper clamping plate 6, so that the upper clamping plate 6 can only move along the height direction of the through slot 8.

[0047] The working principle of this embodiment is:

[0048] During the specific implementation of this solution, when the hook is lifted by the gantry crane, due to the effect of gravity, the two connecting plates 1 will rotate on the hinge shaft 2, that is, the two connecting plates 1 will drive the two hanging arms 5 to slide on the crossbeam 4, so that the two hanging arms 5 are close to each other to clamp the pipe segment 9. At this time, the bottom of the pipe segment 9 is located on the lower supporting plate 7, and the upper clamping plate 6 is located above the pipe segment 9. The staff drives the screw 16 to rotate by rotating the hand wheel 17. After the screw 16 rotates, it drives the moving seat 14 threadedly connected to it to move, and the moving seat 14 drives its The abutment rod 19 at the bottom moves toward the direction approaching the inclined plane 15. At this time, the inclined plane 15 is subjected to the lateral thrust of the abutment rod 19. Due to the setting of the inclined plane 15, the inclined plane 15 will decompose the lateral thrust into the vertical direction of the upper clamping plate 6, thereby causing the upper clamping plate 6 to move downward, and finally clamping the upper part of the pipe segment 9, making the pipe segment 9 more stable during transportation. During the transportation process, if the alarm 21 is activated and an alarm behavior occurs, it means that the clamping of the two booms 5 on the pipe segment 9 has loosened, and the staff can take preventive measures according to the situation.

[0049] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shield segment hoisting and transporting device, characterized in that: It comprises a crossbeam (4), two suspension arms (5) are slidably sleeved on the crossbeam (4), the two suspension arms (5) are respectively located on both sides of the crossbeam (4), a hinge shaft (2) is provided above the crossbeam (4), a lifting lug (3) is provided at the top of the hinge shaft (2), two connecting plates (1) are hingedly connected to the hinge shaft (2), and the ends of the two connecting plates (1) away from the hinge shaft (2) are respectively hingedly connected to the two suspension arms (5); An upper clamping plate (6), a pressure sensor (22) and a lower supporting plate (7) are sequentially arranged on the inner side of the boom (5) from top to bottom. The upper clamping plate (6) can be driven by a driving device arranged on the boom (5) to move up and down on the boom (5), and one end of the upper clamping plate (6) extends outside the through groove (8). The pressure sensor (22) is electrically connected to an alarm (21) arranged on the crossbeam (4).

2. A shield segment hoisting and transporting device according to claim 1, characterized in that: The arm (5) is provided with a through slot (8), the through slot (8) is arranged along the height direction of the arm (5), the upper clamping plate (6) is slidably embedded in the through slot (8), the top of the upper clamping plate (6) is provided with an inclined surface (15), the inclined surface (15) is inclined upward from the outside of the through slot (8) along the inside of the through slot (8), and the bottom of the upper clamping plate (6) is provided with a spring (12) connected to the bottom of the through slot (8); The driving device comprises an abutment rod (19) and a transverse movement assembly, wherein the abutment rod (19) is arranged vertically, the bottom of the abutment rod (19) is in contact with the inclined surface (15), and the transverse movement assembly can drive the abutment rod (19) to move along the width direction of the through slot (8).

3. A shield segment hoisting and transporting device according to claim 2, characterized in that: A bracket (13) is provided at the top of the through slot (8), and the transverse movement assembly comprises a screw rod (16) and a movable seat (14), wherein the screw rod (16) is rotatably connected to the bracket (13), and the screw rod (16) is arranged along the width direction of the through slot (8), and the movable seat (14) is slidably embedded in the through slot (8), and the movable seat (14) is threadedly connected to the screw rod (16), and the abutment rod (19) is fixedly arranged at the bottom of the movable seat (14).

4. A shield segment hoisting and transporting device according to claim 3, characterized in that: A hand wheel (17) is provided at one end of the screw rod (16), and the hand wheel (17) is located outside the through groove (8).

5. The shield segment hoisting and transporting device according to claim 2 is characterized in that: The bottom of the abutment rod (19) is rotatably connected to a roller (20), and the bottom of the roller (20) is in contact with the inclined surface (15).

6. The shield segment hoisting and transporting device according to claim 1 is characterized in that: The bottom of the upper pressing plate (6) and the top of the lower supporting plate (7) are both arc-shaped surfaces adapted to the pipe segment (9).

7. The shield segment hoisting and transporting device according to claim 1 is characterized in that: The bottom of the upper pressing plate (6) and the top of the lower supporting plate (7) are respectively provided with elastic pads (10).

8. The shield segment hoisting and transporting device according to claim 1, characterized in that: Slide blocks (18) are provided on both sides of the upper clamping plate (6) in the width direction, and slide grooves (11) are provided on both sides of the through groove (8) in the width direction, respectively, and the slide blocks (18) are slidably embedded in the slide grooves (11).

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