Auxiliary device for rapidly overturning hydraulic support push rod
The hydraulic support push rod auxiliary device addresses the inefficiencies of manual flipping by enabling rapid and precise repositioning of push rods, enhancing welding efficiency and quality through a hydraulic and lever mechanism.
Patent Information
- Application Number
- CN202422251709.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The turning of the hydraulic support push rod is difficult and time-consuming, resulting in a decrease in welding efficiency.
An auxiliary device including supporting frame, hydraulic jack, clamp plate, crowbar and other components is designed. The clamping bracket and crowbar assist in flipping the push rod through the hydraulic jack to achieve fast and stable flipping operation.
It improves the turn efficiency and welding efficiency of hydraulic support push rods, ensures the accuracy of welding quality and position, and is suitable for different models of hydraulic support push rods.
Smart Images

Figure CN223104622U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of comprehensive coal mining support, and particularly relates to an auxiliary device for quickly turning over a push rod of a hydraulic support. Background Technique
[0002] As Figure 1 shown, the push rod 21 of the hydraulic support, as an important component of the hydraulic support, mostly has a complex box-shaped or rod-shaped structure, involving multiple welding surfaces and weld seams. The structure of the push rod 21 of the hydraulic support is complex, and the weld seams are distributed at different positions. Through the turning technology, the all-position welding of the push rod 21 can be realized to ensure that all weld seams can obtain high-quality welding. However, at present, the turning of the push rod 21 needs to be carried out manually, so that the turning of the push rod 21 is relatively difficult, the turning time is long, and a long waiting time is required during the welding process of the push rod 21, thus reducing the welding efficiency of the push rod 21. Content of the Utility Model
[0003] The utility model overcomes the deficiencies of the prior art and provides an auxiliary device for quickly turning over a push rod of a hydraulic support, solving the problems of difficult turning and long time of the push rod of the current hydraulic support.
[0004] In order to achieve the above purpose, the utility model is realized by the following technical solutions.
[0005] An auxiliary device for quickly turning over a push rod of a hydraulic support includes a support frame. The support frame includes a horizontal support plate and support legs on the lower sides of both ends of the support plate. A hydraulic jack is rotatably arranged at one end of the upper end surface of the support plate, a clamping plate is arranged in the middle of the upper end surface of the support plate, and a crowbar is rotatably arranged at the other end of the upper end surface of the support plate; a clamping bracket is arranged at the end of the piston rod of the hydraulic jack; a telescopic frame is slidably arranged at the lower end surface of the support plate, and a supporting plate is fixedly arranged at the upper end of the telescopic frame.
[0006] Further, the support plate is a horizontally arranged square plate-shaped structure, and the length direction of the support plate is arranged along the left-right direction. A support leg is fixedly arranged on the lower sides of both ends of the support plate respectively. The support leg is an "A"-shaped structure, the upper end of the support leg is fixedly connected with the lower end surface of the support plate, and a horizontal anti-slip pad is fixedly arranged at each of the two ends of the lower end of the support leg.
[0007] Further, a clamping plate is fixedly arranged on the lower end surface of the support plate. The clamping plate is a horizontally arranged square plate-shaped structure, the length direction of the clamping plate is parallel to the length direction of the support plate, and both ends of the clamping plate are fixedly connected with the lower end surface of the support plate respectively; front and rear rows of first fixing holes are arranged on the support plate and the clamping plate respectively, each row of first fixing holes is arranged at equal intervals along the left-right direction, and the number of first fixing holes on the support plate is equal to and corresponds to the number of first fixing holes on the clamping plate one by one.
[0008] Furthermore, two front-to-rear symmetrical hinged ear plates are fixedly provided on the left end of the upper end surface of the support plate, one end of the cylinder bottom of the hydraulic jack is rotatably connected to the two hinged ear plates through a pin shaft, and one end of the piston rod of the hydraulic jack is facing the right side of the support plate; the bracket is a "Y"-shaped rod structure, one end of the bracket is fixedly connected to one end of the piston rod of the hydraulic jack, and the V-shaped opening of the bracket at one end away from the hydraulic jack is facing the right side of the support plate.
[0009] Furthermore, the card plate is an L-shaped plate structure, including a horizontal plate and a vertical plate, the front edge of the horizontal plate is fixedly connected to the lower edge of the vertical plate; two mounting holes are provided on the horizontal plate, the lower end surface of the horizontal plate is in equal contact with the middle part of the upper end surface of the support plate, the two mounting holes on the horizontal plate correspond to the front and rear two first fixing holes on the support plate, the fixing bolts pass through the mounting holes and the first fixing holes and are screwed with fixing nuts, thereby fixing the horizontal plate of the card plate to the support plate; a "︺"-shaped card slot is provided in the middle part of the upper end surface of the vertical plate.
[0010] Furthermore, an L-shaped support rod is fixedly provided at the right end of the upper end surface of the support plate, and the support rod includes a vertical section and a horizontal section. The horizontal section is horizontally arranged along the front-to-back direction, the rear end of the horizontal section is fixedly connected to the upper end of the vertical section, and the lower end of the vertical section is fixedly connected to the upper end surface of the support plate; an internal threaded hole is provided at the front end of the horizontal section, a bolt is threaded inside the internal threaded hole, a crowbar is rotatably sleeved on the outer side of the bolt, and a plurality of through holes are equidistantly arranged on the crowbar along its axial direction, and the crowbar is rotatably sleeved on the outer side of the bolt through one of the through holes.
[0011] Furthermore, the telescopic frame includes a support base and two plug plates. The support base is a "凵"-shaped rod-like structure with an opening facing downward, and a universal wheel is fixedly provided at the two ends of the lower side of the support base; a horizontal plug plate is fixedly provided at the left and right ends of the upper end surface of the support base, and the rear ends of the two plug plates are fixedly connected to the left and right ends of the upper end surface of the support base; a lifting ring is fixedly provided at the rear ends of the upper end surfaces of the two plug plates, and a row of second fixing holes are equidistantly provided on the two plug plates along the front-to-back direction.
[0012] Furthermore, the front sections of the two plug plates of the telescopic frame extend between the support plate and the clamping plate, and the second fixing holes on the two plug plates correspond to the first fixing holes on the support plate and the clamping plate. The fixing bolts pass through the first fixing hole on the support plate, the second fixing hole on the plug plate, and the first fixing hole on the clamping plate and are screwed with fixing nuts, thereby fixing the two plug plates to the support plate and the clamping plate.
[0013] Furthermore, the supporting plate is a horizontally arranged square plate-like structure. A locking hole is provided at each of the left and right ends of the supporting plate. The two ends of the lower end surface of the supporting plate are respectively in contact with the upper end surfaces of the two inserting plates, and the two locking holes at both ends of the supporting plate respectively correspond to the second fixing holes on the two inserting plates. A fixing bolt passes through the locking hole and the second fixing hole and is screwed with a fixing nut, thereby fixedly connecting the supporting plate with the two inserting plates.
[0014] The beneficial effects of the present utility model compared with the prior art are as follows:
[0015] 1. The auxiliary device for the quick-turning hydraulic support push rod provided by the present utility model has a simple structure and good stability, and can firmly fix the hydraulic support push rod to prevent sliding or falling off during the turning process.
[0016] 2. The auxiliary device for the quick-turning hydraulic support push rod provided by the present utility model has flexible turning and can quickly and accurately adjust the position of the push rod for welding different welds.
[0017] 3. The auxiliary device for the quick-turning hydraulic support push rod provided by the present utility model has strong applicability and can adapt to hydraulic support push rods of different models and specifications to meet various welding requirements.
[0018] 4. The auxiliary device for the quick-turning hydraulic support push rod provided by the present utility model is easy to operate and adopts a user-friendly design, enabling the operator to easily and quickly complete the turning operation.
[0019] 5. The auxiliary device for the quick-turning hydraulic support push rod provided by the present utility model can improve the welding efficiency, optimize the welding sequence and welding position, reduce the waiting time and moving time during the welding process, and thus improve the welding efficiency.
[0020] 6. The auxiliary device for the quick-turning hydraulic support push rod provided by the present utility model can ensure the welding quality, help reduce the stress concentration and deformation during the welding process, improve the uniformity and consistency of the weld, and thus ensure the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present utility model will be further described in detail below with reference to the accompanying drawings:
[0022] Figure 1 is a schematic structural diagram of the push rod;
[0023] Figure 2 A three-dimensional schematic diagram of the whole of the present utility model;
[0024] Figure 3 is a three-dimensional schematic diagram of the support frame;
[0025] Figure 4It is a three-dimensional schematic diagram of the telescopic frame;
[0026] Figure 5 It is a three-dimensional schematic diagram of the clamping plate;
[0027] Figure 6 It is a schematic diagram before the push rod flips Figure 1 ;
[0028] Figure 7 It is a schematic diagram before the push rod flips Figure 2 ;
[0029] Figure 8 It is a schematic diagram after the push rod flips;
[0030] Figure 9 It is a schematic diagram after the push rod is pried up by a crowbar;
[0031] Among them, 1 is the support frame, 2 is the support plate, 3 is the support leg, 4 is the hydraulic jack, 5 is the clamping plate, 6 is the crowbar, 7 is the clamping bracket, 8 is the telescopic frame, 9 is the supporting plate, 10 is the anti-slip cushion plate, 11 is the clamping plate, 12 is the first fixing hole, 13 is the hinge ear plate, 14 is the card slot, 15 is the support rod, 16 is the support seat, 17 is the insertion plate, 18 is the universal wheel, 19 is the lifting ring, 20 is the second fixing hole, 21 is the push rod, 22 is the side rib, 23 is the bottom plate, 24 is the U-shaped ear plate. Specific embodiments
[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention will be described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.
[0033] As Figure 2 、 3 、4, and 5 show, the present invention provides an auxiliary device for quickly flipping a hydraulic support push rod, including a support frame 1, the support frame 1 includes a horizontal support plate 2 and support legs 3 on the lower sides of both ends of the support plate 2, a hydraulic jack 4 is rotatably arranged at one end of the upper end surface of the support plate 2, a clamping plate 5 is arranged in the middle of the upper end surface of the support plate 2, and a crowbar 6 is rotatably arranged at the other end of the upper end surface of the support plate 2; a clamping bracket 7 is arranged at the end of the piston rod of the hydraulic jack 4; a telescopic frame 8 is slidably arranged at the lower end surface of the support plate 2, and a supporting plate 9 is fixedly arranged at the upper end of the telescopic frame 8.
[0034] The support plate 2 is a horizontally arranged square plate-like structure, and the length direction of the support plate 2 is arranged along the left-right direction. At the lower sides of both ends of the support plate 2, a support leg 3 is fixedly arranged respectively. The support leg 3 is an "A"-shaped structure, and the upper end of the support leg 3 is fixedly connected to the lower end surface of the support plate 2. At the two end parts of the lower end of the support leg 3, a horizontal anti-slip pad 10 is fixedly arranged respectively.
[0035] A clamping plate 11 is fixedly arranged on the lower end surface of the support plate 2. The clamping plate 11 is a horizontally arranged square plate-like structure, and the length direction of the clamping plate 11 is parallel to the length direction of the support plate 2. The two ends of the clamping plate 11 are respectively fixedly connected to the lower end surface of the support plate 2. On the support plate 2 and the clamping plate 11, two rows of front and rear first fixing holes 12 are respectively arranged. Each row of first fixing holes 12 is arranged at equal intervals along the left-right direction. The number of first fixing holes 12 on the support plate 2 is equal to and corresponds one by one to the first fixing holes 12 on the clamping plate 11.
[0036] At the left end of the upper end surface of the support plate 2, two symmetric front and rear hinge lugs 13 are fixedly arranged. One end of the cylinder bottom of the hydraulic jack 4 is rotationally connected to the two hinge lugs 13 through a pin shaft, and one end of the piston rod of the hydraulic jack 4 faces the right side of the support plate 2. The clamping bracket 7 is a "Y"-shaped rod-like structure, and one end of the clamping bracket 7 is fixedly connected to one end of the piston rod of the hydraulic jack 4. The V-shaped opening at the end of the clamping bracket 7 away from the hydraulic jack 4 faces the right side of the support plate 2.
[0037] The clamping plate 5 is an L-shaped plate-like structure, including a horizontal plate and a vertical plate. The front side edge of the horizontal plate is fixedly connected to the lower edge of the vertical plate. Two mounting holes are arranged on the horizontal plate. The lower end surface of the horizontal plate is in equal contact with the middle part of the upper end surface of the support plate 2. The two mounting holes on the horizontal plate correspond to the front and rear two first fixing holes 12 on the support plate 2. The fixing bolts pass through the mounting holes and are screwed with fixing nuts after passing through the first fixing holes 12, so as to fix the horizontal plate of the clamping plate 5 on the support plate 2. At the middle part of the upper end surface of the vertical plate, a "︺"-shaped card slot 14 is arranged.
[0038] An L-shaped support rod 15 is fixedly arranged at the right end of the upper end surface of the support plate 2. The support rod 15 includes a vertical section and a horizontal section. The horizontal section is horizontally arranged along the front-rear direction. The rear end of the horizontal section is fixedly connected to the upper end of the vertical section. The lower end of the vertical section is fixedly connected to the upper end surface of the support plate 2. An internal thread hole is arranged at the front end of the horizontal section. A bolt is screwed inside the internal thread hole. A crowbar 6 is rotatably sleeved outside the bolt. A plurality of through holes are arranged at equal intervals along the axis direction of the crowbar 6. The crowbar 6 is rotatably sleeved outside the bolt through one of the through holes.
[0039] The telescopic frame 8 includes a support base 16 and two inserting plates 17. The support base 16 is a "U"-shaped rod structure with an opening facing downward. The support base 16 is located in a vertical plane in the left-right direction. A universal wheel 18 is fixedly arranged at each of the lower ends of the two sides of the support base 16. At the left and right ends of the upper end surface of the support base 16, a horizontal inserting plate 17 is fixedly arranged respectively. The two symmetric inserting plates 17 in the left-right direction both extend along the front-back direction, and the rear ends of the two inserting plates 17 are fixedly connected to the left and right ends of the upper end surface of the support base 16. At the rear ends of the upper end surfaces of the two inserting plates 17, a lifting ring 19 is fixedly arranged respectively. The entire telescopic frame 8 can be lifted by the two lifting rings 19. A row of second fixing holes 20 are equidistantly arranged along the front-back direction on the two inserting plates 17 respectively.
[0040] The front sections of the two inserting plates 17 of the telescopic frame 8 extend between the support plate 2 and the clamping plate 11, and the second fixing holes 20 on the two inserting plates 17 correspond to the first fixing holes 12 on the support plate 2 and the clamping plate 11. A fixing bolt passes through the first fixing hole 12 on the support plate 2, the second fixing hole 20 on the inserting plate 17, and the first fixing hole 12 on the clamping plate 11 and is then screwed with a fixing nut, so as to fix the two inserting plates 17 to the support plate 2 and the clamping plate 11, and further fix the telescopic frame 8 to the support frame 1. When the inserting plate 17 slides and expands between the support plate 2 and the clamping plate 11, the second fixing hole 20 on the inserting plate 17 corresponds to different first fixing holes 12 on the support plate 2 and the clamping plate 11, thereby realizing the adjustment of the telescopic frame 8.
[0041] The bearing plate 9 is a horizontally arranged square plate structure, and the length direction of the bearing plate 9 is the left-right direction. A locking hole is arranged at each of the left and right ends of the bearing plate 9. The two ends of the lower end surface of the bearing plate 9 are respectively in contact with the upper end surfaces of the two inserting plates 17, and the two locking holes at the two ends of the bearing plate 9 respectively correspond to the second fixing holes 20 on the two inserting plates 17. A fixing bolt passes through the locking hole and the second fixing hole 20 and is then screwed with a fixing nut, so as to fixedly connect the bearing plate 9 to the two inserting plates 17. By making the locking holes of the bearing plate 9 correspond to different second fixing holes 20 on the inserting plate 17, the front-back position of the bearing plate 9 can be adjusted.
[0042] The working principle of the present utility model is as follows:
[0043] As Figure 6 、 7 shown, the push rod 21 is horizontally placed on the auxiliary device along the front-back direction, so that the lower end surface of the bottom plate 23 of the push rod 21 is respectively in contact with the support plate 2 and the bearing plate 9, and the push rod 21 is supported by the support plate 2 and the bearing plate 9. Make the right end surface of the push rod 21 in contact with the left end of the clamping plate 5, and make the U-shaped ear plate 24 of the push rod 21 vertically upward and extend to the front side of the support plate 2.
[0044] As Figure 8 shown, operate the hydraulic jack 4 so that the V-shaped opening on the bracket 7 on the piston rod of the hydraulic jack 4 is clamped outside the side rib 22 at the left end of the push rod 21. Then operate the piston rod of the hydraulic jack 4 to continue to extend. The hydraulic jack 4 pushes the push rod 21 to the right through the bracket 7. The push rod 21 flips to the right under the fulcrum action of the clamping plate 5, so that the side rib 22 on the right side of the push rod 21 is clamped inside the "︺"-shaped card slot 14 at the upper end of the clamping plate 5, and the hydraulic jack 4 stops extending.
[0045] As Figure 9 shown, then hold the upper end of the crowbar 6 to rotate the crowbar 6 so that the lower end of the crowbar 6 extends into the U-shaped ear plate of the flipped push rod 21, and then pry down the crowbar 6 so that the push rod 21 is disengaged from the clamping plate 5.
[0046] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
Claims
1. An auxiliary device for quickly flipping the push rod of a hydraulic support, characterized in that: It includes a support frame (1), and the support frame (1) includes a horizontal support plate (2) and support legs (3) on the lower sides of both ends of the support plate (2). A hydraulic jack (4) is rotatably arranged at one end of the upper end surface of the support plate (2), a clamping plate (5) is arranged in the middle of the upper end surface of the support plate (2), and a crowbar (6) is rotatably arranged at the other end of the upper end surface of the support plate (2); a clamping bracket (7) is arranged at the end of the piston rod of the hydraulic jack (4); a telescopic frame (8) is slidably arranged at the lower end surface of the support plate (2), and a supporting plate (9) is fixedly arranged at the upper end of the telescopic frame (8).
2. The auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 1, characterized in that: The support plate (2) is a horizontally arranged square plate-like structure, and the length direction of the support plate (2) is arranged along the left-right direction; a support leg (3) is fixedly arranged on the lower sides of both ends of the support plate (2) respectively. The support leg (3) is an "A"-shaped structure, the upper end of the support leg (3) is fixedly connected to the lower end surface of the support plate (2), and a horizontal anti-slip pad (10) is fixedly arranged at each of the two ends of the lower end of the support leg (3).
3. An auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 1, characterized in that: A clamping plate (11) is fixedly arranged on the lower end surface of the support plate (2). The clamping plate (11) is a horizontally arranged square plate-like structure, and the length direction of the clamping plate (11) is parallel to the length direction of the support plate (2). Both ends of the clamping plate (11) are fixedly connected to the lower end surface of the support plate (2); two rows of front and rear first fixing holes (12) are arranged on the support plate (2) and the clamping plate (11) respectively. Each row of the first fixing holes (12) is arranged at equal intervals along the left-right direction. The number of the first fixing holes (12) on the support plate (2) is equal to and corresponds to the first fixing holes (12) on the clamping plate (11) one by one.
4. The auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 1, characterized in that: Two symmetrically arranged front and rear hinge ear plates (13) are fixedly arranged at the left end of the upper end surface of the support plate (2). One end of the cylinder bottom of the hydraulic jack (4) is rotatably connected to the two hinge ear plates (13) through a pin shaft, and one end of the piston rod of the hydraulic jack (4) faces the right side of the support plate (2); the clamping bracket (7) is a "Y"-shaped rod-like structure, one end of the clamping bracket (7) is fixedly connected to one end of the piston rod of the hydraulic jack (4), and the V-shaped opening at the end of the clamping bracket (7) away from the hydraulic jack (4) faces the right side of the support plate (2).
5. The auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 3, characterized in that: The clamping plate (5) is an L-shaped plate-like structure, including a horizontal plate and a vertical plate. The front side edge of the horizontal plate is fixedly connected to the lower edge of the vertical plate; two mounting holes are arranged on the horizontal plate. The lower end surface of the horizontal plate is in equal contact with the middle of the upper end surface of the support plate (2). The two mounting holes on the horizontal plate correspond to the front and rear two first fixing holes (12) on the support plate (2). A fixing bolt passes through the mounting hole and the first fixing hole (12) and is then screwed with a fixing nut, so as to fix the horizontal plate of the clamping plate (5) on the support plate (2); a "︺"-shaped clamping groove (14) is arranged in the middle of the upper end surface of the vertical plate.
6. An auxiliary device for a quick-turning hydraulic support push rod according to claim 1, characterized in that: At the right end of the upper end surface of the support plate (2), an L-shaped support rod (15) is fixedly arranged. The support rod (15) includes a vertical section and a horizontal section. The horizontal section is horizontally arranged along the front-back direction. The rear end of the horizontal section is fixedly connected to the upper end of the vertical section, and the lower end of the vertical section is fixedly connected to the upper end surface of the support plate (2); at the front end of the horizontal section, an internal thread hole is provided, and a bolt is screwed inside the internal thread hole. A crowbar (6) is rotatably sleeved outside the bolt. A plurality of through holes are equidistantly arranged on the crowbar (6) along its axis direction, and the crowbar (6) is rotatably sleeved outside the bolt through one of the through holes.
7. An auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 3, characterized in that: The telescopic frame (8) includes a support base (16) and two insertion plates (17). The support base (16) is a "U"-shaped rod-like structure with an open bottom. At the lower ends of the two sides of the support base (16), a universal wheel (18) is fixedly arranged respectively; at the left and right ends of the upper end surface of the support base (16), a horizontal insertion plate (17) is fixedly arranged respectively. The rear ends of the two insertion plates (17) are fixedly connected to the left and right ends of the upper end surface of the support base (16); at the rear ends of the upper end surfaces of the two insertion plates (17), a hanging ring (19) is fixedly arranged respectively. On the two insertion plates (17), a row of second fixing holes (20) are equidistantly arranged along the front-back direction.
8. An auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 7, characterized in that: The front sections of the two insertion plates (17) of the telescopic frame (8) extend between the support plate (2) and the clamping plate (11), and the second fixing holes (20) on the two insertion plates (17) correspond to the first fixing holes (12) on the support plate (2) and the clamping plate (11). A fixing bolt passes through the first fixing hole (12) on the support plate (2), the second fixing hole (20) on the insertion plate (17), and the first fixing hole (12) on the clamping plate (11), and then a fixing nut is screwed, so as to fix the two insertion plates (17) to the support plate (2) and the clamping plate (11).
9. An auxiliary device for quickly flipping the push rod of a hydraulic support according to claim 7, characterized in that: The supporting plate (9) is a horizontally arranged square plate-like structure. A locking hole is provided at each of the left and right ends of the supporting plate (9). The two ends of the lower end surface of the supporting plate (9) are respectively in contact with the upper end surfaces of the two insertion plates (17), and the two locking holes at the two ends of the supporting plate (9) respectively correspond to the second fixing holes (20) on the two insertion plates (17). A fixing bolt passes through the locking hole and the second fixing hole (20), and then a fixing nut is screwed, so as to fixedly connect the supporting plate (9) to the two insertion plates (17).