A telescopic construction beam construction clamp

Abstract

The utility model provides a telescopic building beam construction clamp, including first clamping unit and second clamping unit, first clamping unit includes first connecting portion, first clamping part and first locking part, and second clamping unit includes second connecting portion, second clamping part and second locking part, first clamping part, second clamping part all along the vertical movablely set up, and the interval distance between first clamping part and second clamping part can be adjusted by the second connecting portion sliding. Such through telescopic adjustment second clamping part and change with the distance between first clamping part reach the effect of clamping beam body pouring mold, can reinforce the stability of template greatly, to improve the beam body pouring effect, and first clamping part and second clamping part all can be adjusted along the vertical and change the length of elongation downward, such can adapt to the multiple application scenarios of different beam body height, and the adaptability is good, and ensure that the height direction of template can keep clamping reinforcement, further guarantee reinforcing effect.

Description

Technical Field

[0001] This utility model relates to the field of construction auxiliary equipment technology, and in particular to a retractable clamp for constructing building beams. Background Technology

[0002] In the construction of frame structures in building engineering, the beams are the core load-bearing components, and the quality of the reinforcement of their formwork directly determines the beam forming accuracy and structural safety. Therefore, beam formwork reinforcement is one of the key procedures in the construction process.

[0003] Existing technologies include manually hammering the other end of the clamp to reinforce the formwork. However, such long-term impact can cause structural fatigue, deformation, and even breakage, resulting in a short service life for the clamps and requiring frequent replacement. Furthermore, it can easily cause the formwork to shift or bulge during concrete pouring, ultimately leading to quality defects such as "bulging" or "sand corners" in the beam. Another method uses shrink-fit clamping, but it is usually not adjustable vertically. This requires equipping different height clamps for different beam height scenarios during construction, which not only increases the cost of clamp procurement and inventory management before construction but also requires frequent switching of different clamp specifications on site, significantly reducing construction convenience and efficiency. It is difficult to meet the integrated reinforcement needs of diverse beam construction scenarios, and if the shrinkage force of the steel structure is too large, it may also damage the formwork.

[0004] Therefore, it is necessary to propose a retractable clamp for the construction of building beams to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a retractable clamp for the construction of building beams, so as to solve the problem that the existing beam formwork reinforcement methods are prone to damage to the formwork and have poor applicability.

[0006] To achieve the above objectives, this utility model provides a retractable clamp for constructing building beams, comprising a first clamping unit and a second clamping unit; wherein, The first clamping unit includes a first connecting portion, a first clamping portion, and a first locking portion; the second clamping unit includes a second connecting portion, a second clamping portion, and a second locking portion; wherein, The first clamping part is vertically connected to the first connecting part, and the first clamping part is movably arranged vertically. The first clamping part is used to abut against one side of the beam. The first locking part restricts the movement of the first connecting part by passing through the first connecting part and being embedded in the first clamping part. The second clamping part is vertically connected to the second connecting part, and the second clamping part is movably arranged vertically. The second clamping part is used to abut against the other side of the beam. The second locking part restricts the movement of the second connecting part by passing through the second connecting part and being embedded in the second clamping part. The first connecting portion has a recessed slide rail extending along the width direction of the beam, and the second connecting portion is slidably connected to the slide rail to adjust the gap between the first clamping portion and the second clamping portion.

[0007] Preferably, the first clamping unit further includes a threaded rod and a rotating head. The first end of the threaded rod passes through the first connecting portion and extends into the slide rail, and the first end of the threaded rod has an external thread. The second connecting portion is recessed to form a threaded groove with an internal thread. The second connecting portion is threadedly connected to the threaded rod, and the threaded rod is rotatably arranged about its own axis. The second end of the threaded rod extends out of the first connecting portion, and the rotating head is fixedly connected to the second end of the threaded rod.

[0008] Preferably, the first connecting part has a recessed first groove at the end away from the second clamping part, the first clamping part is movably connected to the first groove in a vertical direction, the second end of the threaded rod extends out of the first groove, and the first clamping part has a vertical elongated hole through which the threaded rod passes.

[0009] Preferably, the first locking part is a locking bolt, and the side wall of the first clamping part is provided with a plurality of bolt blind holes arranged at equal intervals along the vertical direction. The side wall of the first connecting part is provided with a first through hole that matches the bolt blind holes. The locking bolt passes through the first through hole and is tightened in the bolt blind hole to restrict the movement of the first clamping part.

[0010] Preferably, the end of the second connecting portion away from the first clamping portion is recessed to form a second groove, and the second clamping portion is movably connected to the second groove in a vertical direction.

[0011] Preferably, the second locking part is a locking screw and a locking nut. The side wall of the second clamping part is provided with a plurality of bolt through holes arranged at equal intervals along the vertical direction. The side wall of the second connecting part is provided with a second through hole that matches the bolt through holes. The locking screw passes through the second through hole and the bolt through hole and cooperates with the locking nut to restrict the movement of the second clamping part.

[0012] Preferably, it further includes rubber side pads, and the first clamping part and the second clamping part are each connected to the inner side near the beam body with the rubber side pads.

[0013] Preferably, it further includes a rubber base pad, and the rubber base pad is connected to the bottom side of the end of the first connecting portion near the first clamping portion and the bottom side of the end of the second connecting portion near the second clamping portion.

[0014] Preferably, both the first clamping part and the second clamping part adopt a cuboid structure.

[0015] Preferably, the number of bolt blind holes and bolt through holes are both ten.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides a retractable clamp for constructing building beams, comprising a first clamping unit and a second clamping unit. The first clamping unit includes a first connecting part, a first clamping part, and a first locking part. The second clamping unit includes a second connecting part, a second clamping part, and a second locking part. The first clamping part and the first connecting part are vertically connected, and the first clamping part is vertically movably arranged. The first clamping part is used to abut against one side of the beam. The first locking part restricts the movement of the first connecting part by passing through the first connecting part and being embedded in the first clamping part. The second clamping part and the second connecting part are vertically connected, and the second clamping part is vertically movably arranged. The second clamping part is used to abut against the other side of the beam. The second locking part restricts the movement of the second connecting part by passing through the second connecting part and being embedded in the second clamping part. A slide rail extending along the width direction of the beam is recessed in the first connecting part. The second connecting part is slidably connected to the slide rail to adjust the interval between the first clamping part and the second clamping part. By adjusting the second clamping part and changing the distance between it and the first clamping part, the beam casting template can be clamped, which can greatly strengthen the stability of the template and improve the beam casting effect. Both the first and second clamping parts can be adjusted vertically to change the downward extension length. After adjustment, they are fixed by the locking part and then clamped again. This can adapt to various application scenarios with different beam heights, has good adaptability, and ensures that the template can be clamped and reinforced in the height direction, further guaranteeing the reinforcement effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure unfolded in one embodiment of the present invention; Figure 2 This is a three-dimensional schematic diagram of the overall structure clamping from another perspective in one embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the assembly of the first connecting part and the second connecting part in one embodiment of the present invention; Figure 4 This is a perspective view of the overall structure in one embodiment of the present invention, illustrating an application scenario.

[0019] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0020] Explanation of icon numbers: 10. First clamping unit; 110. First connecting part; 111. Slide rail; 112. First sliding groove; 120. First clamping part; 121. Vertical elongated hole; 122. Bolt blind hole; 130. First locking part; 131. Locking bolt; 140. Threaded rod; 150. Rotating head; 160. Rubber side pad; 170. Rubber bottom pad; 20. Second clamping unit; 210. Second connecting part; 211. Threaded groove; 212. Second sliding groove; 220. Second clamping part; 221. Bolt through hole; 230. Second locking part; 231. Locking screw; 232. Locking nut; 310. Beam; 320. Template. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] Please see the appendix Figure 1-4 The present invention provides a retractable building beam construction clamp in one embodiment, comprising a first clamping unit 10 and a second clamping unit 20, the specific scheme of which is as follows: The first clamping unit 10 includes a first connecting portion 110, a first clamping portion 120, and a first locking portion 130; the second clamping unit 20 includes a second connecting portion 210, a second clamping portion 220, and a second locking portion 230. The first clamping portion 120 is vertically connected to the first connecting portion 110 and is vertically movably disposed. The first clamping portion 120 is used to abut against one side of the beam 310. The first locking portion 130 restricts the movement of the first connecting portion 110 by passing through the first connecting portion 110 and being embedded in the first clamping portion 120. The second clamping portion... The first connecting part 110 is vertically connected to the second connecting part 210, and the second clamping part 220 is vertically movably disposed. The second clamping part 220 is used to abut against the other side of the beam 310. The second locking part 230 is inserted into the second clamping part 220 through the second connecting part 210 to restrict the movement of the second connecting part 210. A slide 111 extending along the width direction of the beam 310 is recessed in the first connecting part 110. The second connecting part 210 is slidably connected to the slide 111 to adjust the interval distance between the first clamping part 120 and the second clamping part 220.

[0026] Specifically, the retractable building beam construction clamp in this application includes a first clamping unit 10 and a second clamping unit 20. Through the cooperation between the first clamping unit 10 and the second clamping unit 20, the template 320 is clamped on both sides of the beam 310 to be poured, thus reinforcing the template 320 and preventing "formwork bulging." The first clamping unit 10 and the second clamping unit 20 can be composed of similar structures (connecting part, clamping part, locking part). The first connecting part 110 is used to press the top of the template 320 of the beam 310, and the first clamping part 120 is used to clamp one side of the beam 310, which is perpendicularly connected to the first connecting part 110 to form a vertical angle to accommodate the corner of the template 320 erected on the beam 310 to be poured. The second connecting part 210 has a similar function to the first connecting part 110, and the second clamping part 220 is used to clamp the other side of the beam 310, similarly connected to the first connecting part 110. The second connecting parts 210 are vertically connected to form another vertical angle to accommodate the other corner of the template 320 of the beam 310 to be poured. The second connecting part 210 is slidably connected to the slide 111 of the first connecting part 110. In this way, the second connecting part 210 can be pulled apart to increase the distance between the second clamping part 220 and the first clamping part 120, and the first connecting part 110 and the second connecting part 210 can be pressed onto the top of the beam 310 (template 320) to be poured, so that the first clamping part 120 and the second clamping part 220 are respectively located on both sides of the beam 310. Then the second connecting part 210 is retracted to reduce the distance between the second clamping part 220 and the first clamping part 120 until it is clamped tightly, thus completing the reinforcement and clamping effect of the template 320. In this way, the template will not expand under the mutual abutment and clamping action of the two clamping parts during pouring, the process is stable, and the pouring effect is guaranteed.

[0027] Both the first clamping part 120 and the second clamping part 220 are vertically adjustable to adapt to different beam heights. For example, in a scenario with a higher beam height, if the vertical length of the first clamping part 120 and the second clamping part 220 is insufficient, the lower portion of the template 320 will lack clamping effectiveness. Although the upper clamping is stable, uneven force distribution can easily occur, ultimately affecting the pouring effect. Therefore, it is usually necessary to manufacture a device with clamping part dimensions that meet the requirements, which increases cost and time. Furthermore, additional adjustments are required for each beam height, which is very inconvenient. Therefore, this application allows for adjusting the downward extension length of the first clamping part 120 and the second clamping part 220 to adapt to different beam height scenarios. Before clamping, the difference between the clamping part and the beam height can be preliminarily compared, and the downward extension can be adjusted accordingly. The first clamping part 120 is moved and adjusted so that the first connecting part 110 is pressed against the top surface of the beam 310. The length of the first clamping part 120 extending downward is flush with the bottom end of the template 320 of the beam 310 to be poured. Then, the first locking part 130 is adjusted to pass through the opening on the first connecting part 110 and be embedded in the opening of the first clamping part 120, thereby achieving the purpose of locking and limiting. Similarly, the first clamping part 120 is adjusted to be at the same height as the first clamping part 120. Then, the second locking part 230 is adjusted to achieve the locking effect, so as to form a rectangular cross section with a fixed height and variable length. Then, the entire device is installed so that the first clamping part 120 and the second clamping part 220 are respectively located on both sides of the template 320 of the beam slab to be poured. Then, the second clamping part 220 is retracted until it is clamped. Optionally, for other scenarios with different beam heights, the above method can be used for adaptive adjustment.

[0028] In a preferred embodiment of the present invention, the first clamping unit 10 further includes a threaded rod 140 and a rotating head 150. The first end of the threaded rod 140 passes through the first connecting portion 110 and extends into the slide rail 111, and the first end of the threaded rod 140 has an external thread. The second connecting portion 210 is recessed to form a threaded groove 211 with an internal thread. The second connecting portion 210 is threadedly connected to the threaded rod 140, and the threaded rod 140 is rotatably arranged around its own axis. The second end of the threaded rod 140 extends out of the first connecting portion 110, and the rotating head 150 is fixedly connected to the second end of the threaded rod 140.

[0029] It should be noted that the extension and retraction between the first connecting part 110 and the second connecting part 210 can be achieved by bolt extension and retraction. The threaded rod 140 is rotatably connected to the slide 111 of the first connecting part 110. To accommodate installation, the second connecting part 210 is recessed to form a threaded groove 211 with internal threads. This internal thread matches the external thread of the threaded rod 140. Since the position of the threaded rod 140 is fixed and it can only rotate, the frequent transmission between the threads during continuous rotation of the threaded rod 140 drives the extension and retraction of the second connecting part 210. The extension and retraction can be operated by forward / reverse rotation. This connection method provides clear guidance and stable connection. When clamped and no longer rotating, the threads have a self-locking ability, which ensures the clamping effect. It can be understood that the thrust generated by the concrete on both sides during pouring can further strengthen the mutual resistance of the threads in the axial direction between the threaded rod 140 and the threaded groove 211, resulting in a good self-locking effect and preventing loosening. The second end of the threaded rod 140 extends out of the first connecting part 110 to facilitate the installation and connection of the rotating head 150. The rotating head 150 can be easily accessed by wrenches, electric wrenches, etc., thereby facilitating the rotation of the threaded rod 140. Preferably, it can adopt a hexagonal cross-section structure to accommodate rotating tools. The specific shape can be set by those skilled in the art as needed.

[0030] In a preferred embodiment of the present invention, the first connecting part 110 is recessed at one end away from the second clamping part 220 to form a first sliding groove 112, the first clamping part 120 is vertically movably connected to the first sliding groove 112, the second end of the threaded rod 140 extends out of the first sliding groove 112, and the first clamping part 120 is provided with a vertical elongated hole 121 through which the threaded rod 140 passes.

[0031] It should be noted that the first groove 112 is used for the first clamping part 120 to be slidably installed vertically, and after sliding adjustment, it can directly abut against one side of the beam body 310 template 320 to ensure the clamping effect. Considering that this application uses a threaded rod 140 to drive the second connecting part 210 to rotate, and the second end of the threaded rod 140 needs to extend out of the first groove 112 to facilitate the installation of the rotating head 150, in order not to be blocked by the threaded rod 140, a vertical elongated hole 121 is provided on the first clamping part 120 for the threaded rod 140 to pass through. In this way, when the first clamping part 120 is adjusted vertically, the threaded rod 140 passes through the vertical elongated hole 121 and will not affect the movement and adjustment of the first clamping part 120.

[0032] In a preferred embodiment of the present invention, the first locking part 130 is a locking bolt 131, and the side wall of the first clamping part 120 is provided with a plurality of bolt blind holes 122 arranged at equal intervals along the vertical direction. The side wall of the first connecting part 110 is provided with a first through hole that matches the bolt blind holes 122. The locking bolt 131 passes through the first through hole and is tightened in the bolt blind hole 122 to restrict the movement of the first clamping part 120.

[0033] It is worth noting that after adjustment, the first locking part 130 and the first clamping part 120 are fixed together by tightening the locking bolt 131, so as to ensure that the first clamping part 120 is kept at a length that matches the beam height template 320. It can be understood that by setting multiple bolt blind holes 122, the spacing and position can be set according to the height dimensions of several commonly used beams 310, which can speed up the adjustment and improve construction efficiency.

[0034] In a preferred embodiment of the present invention, the second connecting portion 210 is recessed at one end away from the first clamping portion 120 to form a second sliding groove 212, and the second clamping portion 220 is movably connected to the second sliding groove 212 in a vertical direction.

[0035] It is worth noting that the second groove 212 is used for the second clamping part 220 to be slidably installed vertically, and after sliding adjustment, it can abut against the other side of the beam 310 template 320 to ensure the clamping effect. This sliding adjustment is more convenient, and then it can be locked and positioned by the second locking part 230.

[0036] Furthermore, the second locking part 230 consists of a locking screw 231 and a locking nut 232. The side wall of the second clamping part 220 is provided with a plurality of bolt through holes 221 arranged at equal intervals along the vertical direction. The side wall of the second connecting part 210 is provided with a second through hole that matches the bolt through holes 221. The locking screw 231 passes through the second through hole and the bolt through hole 221 and cooperates with the locking nut 232 to restrict the movement of the second clamping part 220.

[0037] It should be noted that the use of locking screw 231 and locking nut 232 can further improve the locking ability. Unlike the first locking part 130, which also needs to take into account the position of threaded rod 140, the second locking part 230 can directly provide bolt through hole 221 on the side wall of the second clamping part 220 to penetrate the entire second clamping part 220. After adjustment, tighten the locking screw 231 and then lock it from the other side with locking nut 232 to ensure locking and restrict movement.

[0038] It is worth mentioning that the number of bolt through holes 221 can correspond to the number of threaded blind holes in the first clamping part 120, and their positions can also be aligned horizontally. This facilitates quick positioning when adjusting the second clamping part 220, and keeps the connecting part horizontal after positioning. In a preferred embodiment of this application, the number of bolt blind holes 122 and bolt through holes 221 are both ten. Those skilled in the art can set the position and spacing of the holes according to the commonly used beam height 310.

[0039] Furthermore, it also includes a rubber side pad 160, and the first clamping part 120 and the second clamping part 220 are each connected to the inner side near the beam 310 by the rubber side pad 160.

[0040] It should be understood that, considering the ease of processing of the clamping and connecting parts, steel structures are used. If the clamping force is too great, it may easily damage the template 320 or even the beam 310 over a long period of time. Therefore, the rubber side pad 160 can be added to the first clamping part 120 and the side of the clamping part near the beam 310 (template 320) to avoid scratches on the surface of the template 320 (such as wood chipping or steel scratches), and to fill the gaps in the splicing of the template 320 and improve the clamping seal. The size of the rubber side pad 160 needs to be relative to the vertical length of each clamping part to ensure that the extension distance when the clamping part is adjusted vertically is covered by the rubber side pad 160. The rubber side pad 160 of the first clamping part 120 is machined with a long hole for the threaded rod 140 to pass through.

[0041] Furthermore, it also includes a rubber base pad 170, with the rubber base pad 170 connected to the bottom side of the end of the first connecting portion 110 near the first clamping portion 120 and the bottom side of the end of the second connecting portion 210 near the second clamping portion 220.

[0042] It should be noted that the rubber pad 170 is used to protect the bottom side of the connecting part from wear between the top of the beam 310 (template 320). It only needs to be set at the position near the clamping part (i.e., at the right angle corner) on the bottom side of each connecting part, corresponding to the top range of the template 320.

[0043] Furthermore, both the first clamping part 120 and the second clamping part 220 adopt a cuboid structure.

[0044] It should be noted that when using a cuboid, the side planes have a larger contact area and are more adaptable during contact, resulting in a better clamping effect.

[0045] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A telescopic construction beam clamp, characterized in that, It includes a first clamping unit and a second clamping unit; wherein, The first clamping unit includes a first connecting portion, a first clamping portion, and a first locking portion; the second clamping unit includes a second connecting portion, a second clamping portion, and a second locking portion; wherein, The first clamping part is vertically connected to the first connecting part, and the first clamping part is movably arranged vertically. The first clamping part is used to abut against one side of the beam. The first locking part restricts the movement of the first connecting part by passing through the first connecting part and being embedded in the first clamping part. The second clamping part is vertically connected to the second connecting part, and the second clamping part is movably arranged vertically. The second clamping part is used to abut against the other side of the beam. The second locking part restricts the movement of the second connecting part by passing through the second connecting part and being embedded in the second clamping part. The first connecting portion has a recessed slide rail extending along the width direction of the beam, and the second connecting portion is slidably connected to the slide rail to adjust the gap between the first clamping portion and the second clamping portion.

2. The telescoping construction beam clamp of claim 1, wherein, The first clamping unit further includes a threaded rod and a rotating head. The first end of the threaded rod passes through the first connecting part and extends into the slide rail. The first end of the threaded rod has an external thread. The second connecting part is recessed to form a threaded groove with an internal thread. The second connecting part is threadedly connected to the threaded rod. The threaded rod is rotatably arranged about its own axis. The second end of the threaded rod extends out of the first connecting part. The rotating head is fixedly connected to the second end of the threaded rod.

3. The telescoping construction beam clamp of claim 2, wherein, The first connecting part has a recessed first groove at one end away from the second clamping part. The first clamping part is vertically movably connected to the first groove. The second end of the threaded rod extends out of the first groove, and the first clamping part has a vertical elongated hole through which the threaded rod passes.

4. The retractable clamp for constructing building beams according to claim 3, characterized in that, The first locking part is a locking bolt. The side wall of the first clamping part is provided with a plurality of bolt blind holes arranged at equal intervals along the vertical direction. The side wall of the first connecting part is provided with a first through hole that matches the bolt blind holes. The locking bolt passes through the first through hole and is tightened in the bolt blind hole to restrict the movement of the first clamping part.

5. The telescoping construction beam clamp of claim 4, wherein, The second connecting portion has a recessed second groove at one end away from the first clamping portion, and the second clamping portion is movably connected to the second groove in a vertical direction.

6. The telescoping construction beam clamp of claim 5, wherein, The second locking part consists of a locking screw and a locking nut. The side wall of the second clamping part is provided with a plurality of bolt through holes arranged at equal intervals along the vertical direction. The side wall of the second connecting part is provided with a second through hole that matches the bolt through holes. The locking screw passes through the second through hole and the bolt through hole and cooperates with the locking nut to restrict the movement of the second clamping part.

7. The telescoping construction beam clamp of claim 1, wherein, It also includes rubber side pads, and the first clamping part and the second clamping part are each connected to the inner side of the beam body with the rubber side pads.

8. The retractable clamp for constructing building beams according to claim 7, characterized in that, It also includes rubber pads, and the rubber pads are connected to the bottom side of the end of the first connecting part near the first clamping part and the bottom side of the end of the second connecting part near the second clamping part.

9. The telescoping construction beam clamp of claim 1, wherein, Both the first clamping part and the second clamping part adopt a cuboid structure.

10. The telescoping construction beam clamp of claim 6, wherein, The number of bolt blind holes and bolt through holes is ten each.

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