CN217028384U - Building engineering rail guard - Google Patents

Abstract

The application discloses a building engineering protective guard, which comprises two supporting plates and a movable fixing mechanism, wherein the bottom ends of the two supporting plates are respectively and fixedly connected with the top ends of bottom plates, and pulleys are respectively arranged on the front side and the rear side of the bottom ends of the two bottom plates; the movable fixing mechanism comprises two fixing plates, the centers of the top ends of the two fixing plates are fixedly connected with the bottom ends of the outer walls of the first cavity shafts respectively, and the inner cavities of the top ends of the first cavity shafts are in threaded sleeve connection with the bottom ends of the first threaded rods respectively. Through passing through fixing bolt connection second fixed block respectively with two first fixed blocks, will go up connecting block and lower connecting block joint again to the upper sliding block slides at spout inner chamber down, and the lower sliding block slides at spout inner chamber down, and the interval between two backup pads is minimum this moment, thereby accomplishes the folding of rail guard, reduces the occupation space of rail guard, thereby makes things convenient for the transportation of accomodating of rail guard.

Description

Building engineering rail guard

Technical Field

The application relates to the field of constructional engineering, in particular to a constructional engineering protective guard.

Background

The building engineering, which is a part of the construction engineering, refers to an engineering entity formed by the construction of various building constructions and their auxiliary facilities and the installation activities of lines, pipelines and equipment matched with the building constructions. The protective guard is used for preventing non-construction personnel from entering a construction area during building construction, and generally used for blocking the non-construction personnel.

The size of the existing protective guard is difficult to adjust, so that the existing protective guard cannot adapt to different requirements of protective areas with different sizes, the practicability of the protective guard is poor, and the existing protective guard is inconvenient to move and store, so that the protective guard is inconvenient to move and fixedly use. Therefore, a protective fence for construction engineering is provided to solve the above problems.

Disclosure of Invention

The construction engineering protective guard is provided in the embodiment to solve the problem that the protective guard in the prior art is inconvenient to shift and fix according to specific protection requirements.

According to one aspect of the application, the building engineering protective guard comprises two supporting plates and a moving fixing mechanism, wherein the bottom ends of the two supporting plates are fixedly connected with the top ends of bottom plates respectively, and pulleys are mounted on the front side and the rear side of the bottom ends of the two bottom plates respectively;

remove fixed establishment and include the fixed plate, the fixed plate has two, two fixed plate top center department is first cavity off-axial wall bottom of fixed connection respectively, two first cavity off-axial wall inner chamber screw respectively cup joints first threaded rod bottom, two first threaded rod top rotates respectively and connects diaphragm bottom center department down, two first threaded rod top is fixed respectively and cup joints the carousel, two fixed plate top left and right sides center punishment is respectively fixed connection telescopic link bottom, two under the telescopic link top fixed connection respectively the diaphragm bottom left and right sides, two the fixed plate left and right sides slides respectively and cup joints and runs through the staple.

Furthermore, two one side top that the backup pad is close to each other is fixed connection upper transverse plate one end respectively, two one side below that the backup pad is close to each other is fixed connection lower transverse plate one end respectively, two one side that the upper transverse plate bottom is close to each other is fixed connection riser top respectively, two one side that two lower transverse plate tops of riser bottom difference fixed connection are close to each other.

Furtherly, two one side top that the riser outer wall is close to each other rotates respectively to connect up changes board top, two go up the board bottom and rotate respectively and connect the connection and go up the connecting block top left and right sides, two one side bottom that the riser outer wall is close to each other rotates respectively to connect down changes board bottom, two down change the board top and rotate respectively and connect down the connecting block bottom left and right sides, go up the connecting block bottom respectively joint connecting block top down.

And furthermore, the left side is used for fixedly connecting the first fixing block at the top right side of the upper transverse plate and the left side is used for fixedly connecting the first fixing block at the bottom right side of the lower transverse plate, the two first fixing blocks are respectively embedded with a threaded hole at the center and are respectively connected with one end and two ends of a fixing bolt through threads at the other end of the fixing bolt, the other end of the fixing bolt is respectively connected with the inner wall of the second fixing block through threads at the left side and the bottom left side of the lower transverse plate at the top left side and the right side of the second fixing block respectively and fixedly connected with the right side of the upper transverse plate.

Furthermore, two one side that the backup pad is close to each other is the even fixed connection spring one end respectively, and two sets of the spring other end is the one side that two riser outer walls of fixed connection kept away from each other respectively.

Furthermore, the bottom ends of the two upper transverse plates are respectively and horizontally embedded with an upper sliding chute, the top ends of the two lower transverse plates are respectively embedded with a lower sliding chute, the inner cavities of the two upper sliding chutes are respectively connected with an upper sliding block in a sliding manner, and the inner cavities of the two lower sliding chutes are respectively connected with a lower sliding block in a sliding manner.

And furthermore, the inner cavities of the upper sliding blocks are respectively in sliding sleeve connection and penetrate through one end of a clamping block, the inner cavities of the lower sliding blocks are respectively in sliding sleeve connection and penetrate through one end of the clamping block, the ends, far away from the vertical plate, of the clamping blocks are respectively in clamping connection with clamping grooves, and the clamping grooves are respectively vertically embedded in the top end of the inner wall of the upper sliding groove and the bottom end of the inner wall of the lower sliding groove.

Furthermore, two sets of clamping blocks are kept away from one end of the clamping groove and are fixedly connected with one end of the outer wall of the second cavity shaft respectively, two sets of inner cavities at the other end of the second cavity shaft are in threaded sleeve connection with the top end and the bottom end of the second threaded rod respectively, the thread directions of the top end and the bottom end of the second threaded rod are opposite, the outer wall of the second threaded rod is in rotating sleeve connection with the outer wall of the second threaded rod respectively and penetrates through the inserting block, and the inserting blocks are horizontally inserted into the inner wall of the vertical plate respectively.

Furthermore, two second bevel gears are fixedly sleeved at the centers of the two second threaded rods respectively and are engaged with the first bevel gears respectively, the two first bevel gears are fixedly sleeved at the rear ends of the rotating blocks respectively, and the front ends of the rotating blocks are rotatably sleeved and penetrate through the side wall of the front side of the vertical plate respectively.

And furthermore, the left side and the right side of the end, close to each other, of the outer wall of the second cavity shaft are fixedly connected with limit blocks respectively, the limit blocks are sleeved in the inner cavity of the limit groove in a sliding mode respectively, and the limit grooves are vertically embedded in the left side and the right side of the inner wall of the vertical plate respectively.

Through the embodiment of the application, the movable fixing mechanism is adopted, the problem that the guard rail is inconvenient to move and fix according to specific protection requirements is solved, and the practicability of the guard rail is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic overall perspective view of an embodiment of the present application;

FIG. 2 is a schematic diagram of the overall internal structure of an embodiment of the present application;

fig. 3 is a schematic diagram of a partial enlarged structure at a in fig. 2 according to an embodiment of the present application.

In the figure: 1. a support plate; 2. an upper transverse plate; 3. an upper chute; 4. a first fixed block; 5. a threaded hole; 6. an upper connecting block; 7. an upper rotating plate; 8. fixing the bolt; 9. a second fixed block; 10. a turntable; 11. a telescopic rod; 12. a base plate; 13. a pulley; 14. fixing nails; 15. a fixing plate; 16. a first cavity shaft; 17. a first threaded rod; 18. a lower rotating plate; 19. a lower connecting block; 20. a lower transverse plate; 21. a lower chute; 22. a spring; 23. a first bevel gear; 24. a vertical plate; 25. a second cavity shaft; 26. a clamping block; 27. a card slot; 28. a lower slider; 29. a limiting block; 30. a limiting groove; 31. a second threaded rod; 32. inserting a block; 33. a second bevel gear; 34. rotating the block; 35. and (4) an upper sliding block.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1-3, a guard rail for construction engineering comprises two support plates 1 and a movable fixing mechanism, wherein the bottom ends of the two support plates 1 are respectively and fixedly connected with the top ends of bottom plates 12, and pulleys 13 are respectively mounted on the front side and the rear side of the bottom ends of the two bottom plates 12;

remove fixed establishment and include fixed plate 15, fixed plate 15 has two, two fixed plate 15 top center department is the 16 outer wall bottoms of the first cavity axle of fixed connection 16 respectively, two 16 top inner chambers of first cavity axle screw thread respectively cup joints 17 bottom, two diaphragm 20 bottom center department under the first threaded rod 17 top rotates respectively to connect, two first threaded rod 17 top is fixed cup joint carousel 10, two respectively fixed plate 15 top left and right sides center punishment is respectively fixed connection telescopic link 11 bottom, two diaphragm 20 bottom left and right sides under the 11 tops of telescopic link respectively fixed connection, two the fixed plate 15 left and right sides slides respectively and cup joints and just runs through staple 14.

The upper parts of the sides, close to each other, of the two support plates 1 are respectively and fixedly connected with one end of an upper transverse plate 2, the lower parts of the sides, close to each other, of the two support plates 1 are respectively and fixedly connected with one end of a lower transverse plate 20, the sides, close to each other, of the bottoms of the two upper transverse plates 2 are respectively and fixedly connected with the top ends of vertical plates 24, the bottom ends of the two vertical plates 24 are respectively and fixedly connected with the side, close to each other, of the top ends of the two lower transverse plates 20, the top ends of the sides, close to each other, of the outer walls of the two vertical plates 24 are respectively and rotatably connected with the top ends of the upper rotating plates 7, the bottom ends of the two upper rotating plates 7 are respectively and rotatably connected with the left and right sides of the top ends of upper connecting blocks 6, the bottom ends of the upper connecting blocks 6 are respectively and rotatably connected with the top ends of the lower connecting blocks 19, the distance between two vertical plates 24 is convenient to adjust and fix, the left side is positioned on the right side of the top end of the upper transverse plate 2 and fixedly connected with a first fixed block 4, the left side is positioned on the right side of the bottom end of the lower transverse plate 20 and fixedly connected with the first fixed block 4, the center of the two first fixed blocks 4 is respectively embedded with a threaded hole 5, the two threaded holes 5 are respectively in threaded connection with one end of a fixed bolt 8, the other ends of the two fixed bolts 8 are respectively in threaded connection with the inner wall of a second fixed block 9, the two second fixed blocks 9 are respectively in fixed connection with the left side of the top end of the right upper transverse plate 2 and the left side of the bottom end of the right lower transverse plate 20, one side of the two support plates 1 which are close to each other is respectively and uniformly fixedly connected with one end of a spring 22, the other ends of the two sets of springs 22 are respectively and fixedly connected with one side of the outer walls of the two vertical plates 24 which are far away from each other, the stable horizontal movement of the vertical plates 24 is convenient, and the bottom ends of the two upper transverse plates 2 are respectively and horizontally embedded with an upper chute 3, the top ends of the two lower transverse plates 20 are respectively embedded with a lower sliding groove 21, the inner cavities of the two upper sliding grooves 3 are respectively connected with an upper sliding block 35 in a sliding manner, the inner cavities of the two lower sliding grooves 21 are respectively connected with a lower sliding block 28 in a sliding manner, so that the upper sliding block 35 and the lower sliding block 28 can stably slide, the inner cavities of the two upper sliding blocks 35 are respectively sleeved with and penetrate through one end of a clamping block 26 in a sliding manner, the inner cavities of the two lower sliding blocks 28 are respectively sleeved with and penetrate through one end of the clamping block 26 in a sliding manner, the ends of the two groups of clamping blocks 26 far away from the vertical plate 24 are respectively clamped with the clamping grooves 27, the two groups of clamping grooves 27 are respectively vertically embedded at the top end of the inner wall of the upper sliding groove 3 and the bottom end of the inner wall of the lower sliding groove 21, so that the clamping block 26 is connected with the clamping groove 27 to fix the position of the vertical plate 24, the ends of the two groups of the clamping blocks 26 far away from the clamping grooves 27 are respectively fixedly connected with one end of the outer wall of the second hollow shaft 25, the inner cavities at the other end of the two groups of the second hollow shaft 25 are respectively sleeved with the top end and the top end of a second threaded rod 31 and the bottom end of the threaded rod, the top and bottom threads of the two second threaded rods 31 are opposite in direction, the outer walls of the two second threaded rods 31 are respectively rotatably sleeved and penetrate through the insert blocks 32, the two groups of insert blocks 32 are respectively horizontally inserted into the inner wall of the vertical plate 24 to increase the rotating stability of the second cavity shaft 25, the centers of the two second threaded rods 31 are respectively fixedly sleeved with the second bevel gears 33, the two second bevel gears 33 are respectively engaged and matched with the first bevel gears 23, the two first bevel gears 23 are respectively fixedly sleeved at the rear ends of the rotating blocks 34, the front ends of the two rotating blocks 34 are respectively rotatably sleeved and penetrate through the front side wall of the vertical plate 24, the second threaded rods 31 are driven to rotate by rotating the rotating blocks 34, the left and right sides of the end, close to each other, of the outer walls of the two groups of second cavity shafts 25 are respectively fixedly connected with the limiting blocks 29, and the two groups of limiting blocks 29 are respectively slidably sleeved in the inner cavities of the limiting grooves 30, two sets of the limiting grooves 30 are vertically embedded in the left side and the right side of the inner wall of the vertical plate 24 respectively to limit the rotation of the cavity shaft.

When the folding protective guard is used, electrical components appearing in the application are externally connected with a power supply and a control switch when in use, two first fixing blocks 4 are respectively connected with a second fixing block 9 through fixing bolts 8, an upper connecting block 6 is clamped with a lower connecting block 19, an upper slide block 35 slides in an inner cavity of a lower sliding groove 21, a lower slide block 28 slides in an inner cavity of the lower sliding groove 21, the distance between two supporting plates 1 is minimum at the moment, so that the folding of the protective guard is completed, the occupied space of the protective guard is reduced, the storage and transportation of the protective guard are facilitated, two vertical plates 24 respectively slide to one ends far away from the supporting plates 1, then a rotating block 34 is rotated, the rotating block 34 drives a first bevel gear 23 to rotate, a second bevel gear 33 meshed with the first bevel gear 23 rotates along with the second bevel gear, the second bevel gear 33 drives a second threaded rod 31 to rotate, and two cavity shafts in threaded fit with the second threaded rod 31 respectively rotate under the limit of a limit block 29 and a limit groove 30 The two sets of cavity shafts respectively drive the fixture blocks 26 to penetrate through the upper slide block 35 and the lower slide block 28 and finally are clamped in the inner cavity of the clamping groove 27, the positions of the vertical plates 24 are fixed, the upper connecting block 6 is separated from the lower connecting block 19 according to the width of a region to be protected, the two sets of upper rotating plates 7 and the lower rotating plates 18 rotate to adjust the distance between the two vertical plates 24, further, the distance adjustment between the two supporting plates 1 is completed to obtain the size requirement of the required protection width, the two supporting plates 1 can conveniently drive the whole protective guard to move through the pulleys 13, so that the size adjustment of the protective guard is facilitated, after the required size of the protective guard is adjusted, the rotary table 10 is rotated to drive the first threaded rod 17 to rotate, the first cavity shaft 16 in threaded fit with the first threaded rod 17 vertically moves downwards under the limitation of the limiting rod, so that the two cavity plates respectively drive the fixing plates 15 to contact the ground, the fixing nails 14 penetrating through the fixing plate 15 are inserted into the ground to fix the guard rail, thereby ensuring the fixing effect of the guard rail and facilitating the detachment and displacement of the guard rail.

The application has the advantages that:

1. the folding protective guard is simple to operate, the two first fixing blocks are respectively connected with the second fixing block through the fixing bolts, the upper connecting block is clamped with the lower connecting block, the upper sliding block slides in the inner cavity of the lower sliding groove, the lower sliding block slides in the inner cavity of the lower sliding groove, and the distance between the two supporting plates is the minimum, so that the folding protective guard is completed, the occupied space of the protective guard is reduced, and the storage and transportation of the protective guard are facilitated;

2. the structure of the device is reasonable, the rotating block is rotated to drive the first bevel gear to rotate, the second bevel gear meshed and matched with the first bevel gear rotates along with the first bevel gear, the second bevel gear drives the second threaded rod to rotate, the two cavity shafts in threaded fit with the second threaded rod move towards directions far away from each other under the limit of the limit blocks and the limit grooves respectively, the two groups of cavity shafts respectively drive the clamping blocks to penetrate through the upper sliding block and the lower sliding block and are finally clamped in the inner cavity of the clamping groove, the positions of the vertical plates are fixed at the moment, the upper connecting block is separated from the lower connecting block according to the width of a region to be protected, the two groups of upper rotating plates and the lower rotating plates rotate, the distance between the two vertical plates is adjusted, and then the distance adjustment between the two supporting plates is completed, so that the size requirement of the required protection width is obtained;

3. this application can make things convenient for two backup pads to drive whole rail guard and remove through the pulley, thereby be convenient for carry out size adjustment to the rail guard, after adjusting the required size of the rail guard that finishes, through rotating the carousel, the carousel drives first threaded rod and rotates, move down vertically under the restriction of gag lever post with first threaded rod screw-thread fit's first cavity axle, make two cavity boards drive fixed plate contact ground respectively, the staple that will run through the fixed plate again inserts ground, the realization is fixed to the rail guard, thereby the fixed effect of rail guard has been guaranteed, and still make things convenient for the dismantlement aversion of rail guard.

The present application relates to circuits and electronic components and modules, all of which are well within the skill of those in the art and, needless to say, does not relate to software or process improvements.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A building engineering rail guard which characterized in that: the device comprises two support plates (1) and a movable fixing mechanism, wherein the bottom ends of the two support plates (1) are respectively and fixedly connected with the top ends of bottom plates (12), and pulleys (13) are respectively arranged on the front side and the rear side of the bottom ends of the two bottom plates (12);

remove fixed establishment and include fixed plate (15), fixed plate (15) have two, two fixed plate (15) top center department respectively fixed connection first cavity axle (16) outer wall bottom, two first cavity axle (16) top inner chamber screw sleeve connects first threaded rod (17) bottom respectively, two first threaded rod (17) top rotates respectively and connects down diaphragm (20) bottom center department, two first threaded rod (17) top is fixed respectively and cup joints carousel (10), two fixed plate (15) top left and right sides center punishment respectively fixed connection telescopic link (11) bottom, two under the fixed connection of telescopic link (11) top difference fixed connection diaphragm (20) bottom left and right sides, two fixed plate (15) left and right sides slides respectively and cup joints and run through staple (14).

2. A construction engineering guard rail according to claim 1, characterized in that: two one side top that backup pad (1) is close to each other is fixed connection upper transverse plate (2) one end respectively, two one side below that backup pad (1) is close to each other is diaphragm (20) one end down fixed connection respectively, two go up one side that diaphragm (2) bottom is close to each other is fixed connection riser (24) top respectively, two one side that diaphragm (20) top is close to each other under fixed connection is two respectively for riser (24) bottom.

3. A construction engineering guard rail according to claim 2, characterized in that: two one side top that riser (24) outer wall is close to each other rotates respectively to connect and changes board (7) top, two go up change board (7) bottom and rotate respectively and connect connecting block (6) top left and right sides, two one side bottom that riser (24) outer wall is close to each other rotates respectively to connect down changes board (18) bottom, two change board (18) top down and rotate respectively and connect down connecting block (19) bottom left and right sides, go up connecting block (6) bottom joint respectively down connecting block (19) top.

4. A construction engineering guard rail according to claim 2, characterized in that: be located the left side go up the first fixed block of diaphragm (2) top right side fixed connection (4), be located the left side down the first fixed block of diaphragm (20) bottom right side fixed connection (4), two screw hole (5), two have been inlayed respectively to first fixed block (4) center department screw hole (5) threaded connection fixing bolt (8) one end respectively, two fixing bolt (8) other end is threaded connection second fixed block (9) inner wall respectively, two diaphragm (20) bottom left side under diaphragm (2) top left side and the right side on the second fixed block (9) fixed connection right side respectively.

5. A construction engineering guard rail according to claim 1, characterized in that: two one side that backup pad (1) is close to each other is even fixed connection spring (22) one end respectively, and is two sets of spring (22) other end is one side that two riser (24) outer walls of fixed connection kept away from each other respectively.

6. A construction engineering guard rail according to claim 2, characterized in that: two go up diaphragm (2) bottom level respectively and have inlayed last spout (3), two lower diaphragm (20) top has inlayed down spout (21), two respectively go up spout (3) inner chamber difference sliding connection and go up slider (35), two slider (28) under lower spout (21) inner chamber difference sliding connection.

7. A construction engineering guard rail according to claim 6, characterized in that: two go up slider (35) inner chamber and slide respectively and cup joint and run through fixture block (26) one end, two lower slider (28) inner chamber slides respectively and cup joints and runs through fixture block (26) one end, and is two sets of the one end that riser (24) were kept away from in fixture block (26) is joint draw-in groove (27) respectively, and is two sets of draw-in groove (27) are vertical to inlay respectively at last spout (3) inner wall top and spout (21) inner wall bottom down.

8. A construction engineering guard rail according to claim 7, characterized in that: two sets of one end that draw-in groove (27) was kept away from in fixture block (26) is fixed connection second cavity axle (25) outer wall one end respectively, and two sets of second cavity axle (25) other end inner chamber is threaded socket second threaded rod (31) top and bottom respectively, two second threaded rod (31) top and bottom screw thread opposite direction, two second threaded rod (31) outer wall rotates respectively to cup joint and runs through inserted block (32), and is two sets of inserted block (32) are the level respectively and are pegged graft at riser (24) inner wall.

9. A construction engineering guard rail according to claim 8, wherein: two second conical gear (33) are fixedly sleeved at the center of the second threaded rod (31) respectively, the second conical gear (33) is meshed with the first conical gear (23) respectively, the first conical gear (23) is fixedly sleeved at the rear end of the rotating block (34) respectively, and the front end of the rotating block (34) is rotatably sleeved and penetrates through the side wall of the front side of the vertical plate (24) respectively.

10. A construction engineering guard rail according to claim 8, wherein: two sets of the one end left and right sides that second cavity axle (25) outer wall is close to each other is fixed connection stopper (29) respectively, and is two sets of stopper (29) slide respectively and cup joint at spacing groove (30) inner chamber, and are two sets of spacing groove (30) are vertical respectively and inlay in riser (24) inner wall left and right sides.

Images