A reinforcing steel bending device for construction engineering

Abstract

The utility model relates to the technical field of building engineering steel bar bending device, especially building engineering steel bar bending device, including device body, device body is provided with connecting mechanism, connecting mechanism contains the drive assembly of setting in device body middle segment, device body middle segment is provided with the bending assembly, device body left section is provided with the feed assembly. The connecting block is moved under the guidance of the limiting sliding block by the connecting rod, the rack plate and the meshing gear are accurately meshed, make the rotating connecting rod stable rotation, the steel bar limiting groove on the limiting disc can firmly fix the steel bar, with the rotation of the rotating connecting rod, the steel bar bending angle is accurately controlled, the thread push rod is cooperated with the thread of the connecting ring, can fine adjustment steel bar feed quantity, avoid the steel bar bending angle uneven, feed position deviation etc. problem, guarantee the steel bar processing quality, satisfy the strict requirement of modernization building to steel bar high accuracy processing, improve the structure stability and security of building.

Description

Technical Field

[0001] This utility model relates to the technical field of steel bar bending devices for building engineering, and in particular to a steel bar bending device for building engineering. Background Technology

[0002] In the construction process, steel bars are a key building material, and their processing quality directly affects the structural stability and safety of buildings. Traditional steel bar bending methods have many drawbacks, severely restricting construction efficiency and project quality. Manual bending not only consumes a lot of manpower and time, but also makes it difficult to guarantee bending accuracy, which is greatly affected by the operator's skill level, resulting in inconsistent bending angles. This cannot meet the strict requirements of modern buildings for steel bar processing precision. Some simple bending equipment has limited functions and can only achieve simple straight-line bending. It is powerless to handle the bending needs of complex-shaped steel bars, and its control over steel bar feed is not precise enough, easily leading to problems such as unstable feed speed and positional deviation, which further affects the bending effect. Based on this, a steel bar bending device for construction engineering is proposed to solve the above problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a rebar bending device for construction engineering. It solves the numerous drawbacks of traditional rebar bending methods, which severely restrict construction efficiency and project quality. Manual bending not only consumes a large amount of manpower and time, but also makes it difficult to guarantee bending accuracy, greatly affecting the operator's skill level and resulting in inconsistent bending angles. This fails to meet the stringent requirements of modern construction for rebar processing precision. Some simple bending equipment has limited functionality, only capable of simple straight-line bending, and is powerless to handle the bending needs of complex-shaped rebars. Furthermore, it lacks precision in rebar feed control, easily leading to unstable feed speed and positional deviations, further impacting the bending effect.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a steel bar bending device for building engineering, comprising a device body, the device body being provided with a connecting mechanism, the connecting mechanism including a driving component disposed in the middle section of the device body, a bending component disposed in the middle section of the device body, and a feeding component disposed in the left section of the device body;

[0005] The bending assembly includes a rotating rod rotatably connected to the inner wall of the device body. A rotating ring is fixedly connected to the outer wall of the rotating rod, and a connecting rod is fixedly connected to the outer wall of the rotating ring. A connecting block is hinged to the other end of the connecting rod. A limit slider is slidably connected to the connecting block. A rack plate is fixedly connected to the outer wall of the connecting rod. A meshing gear is engaged with the rack plate. A rotating connecting rod is fixedly connected to the inner wall of the meshing gear. A limit disc is fixedly connected to the top of the rotating connecting rod.

[0006] A further improvement is that the drive assembly includes a fixed frame fixedly connected to the top of the device body, a drive motor fixedly mounted on the top of the fixed frame, a drive wheel fixedly connected to the outer wall of the output shaft of the drive motor, a drive wheel being driven by a transmission belt, and a transmission rod fixedly connected to the inner wall of the transmission wheel.

[0007] A further improvement is that the feeding assembly includes a connecting rod rotatably connected to the outer wall of the device body, a handle fixedly connected to the outer end of the connecting rod, a drive gear fixedly connected to the outer wall of the connecting rod, the drive gear meshing with a gear, a fixing plate fixedly connected to the outer end of the gear, a threaded push rod rotatably connected to the inner wall of the fixing plate, a connecting ring threadedly connected to the outer wall of the threaded push rod, a connecting pull rod rotatably connected to the outer end of the connecting ring, and a feeding roller rotatably connected to the connecting pull rod.

[0008] A further improvement is that the rotating connecting rod is rotatably connected to a bearing frame fixedly installed inside the limiting slider, and the limiting plate is provided with a rebar limiting groove; the limiting plate fixedly connected to the top of the rotating connecting rod is also provided with a rebar limiting groove; when the rebar is placed in the rebar limiting groove of the limiting plate, as the rotating connecting rod rotates, the limiting plate drives the rebar to perform a bending operation, thereby achieving precise bending of the rebar; by controlling the rotation angle and speed of the rotating rod, the bending angle and shape of the rebar can be adjusted to meet the diverse needs of different construction projects for rebar bending.

[0009] A further improvement is that the transmission rod is rotatably connected to the inner wall of the device body, and the other end is fixed to the back end of the connecting rod; the drive wheel is connected to the transmission wheel through a transmission belt, transmitting the power of the drive motor to the transmission wheel; the transmission rod fixedly connected to the inner wall of the transmission wheel rotates accordingly, and the transmission rod is rotatably connected to the inner wall of the device body, ensuring the stability and accuracy of power transmission.

[0010] A further improvement is that the feed roller is slidably connected to the top of the device body; by adjusting the position of the feed roller, precise control of the feed speed and position of the steel bar can be achieved; the operator can flexibly adjust the feed amount of the steel bar by turning the handle according to the actual needs of the steel bar bending, ensuring that the steel bar can accurately reach the designated position during the bending process.

[0011] A further improvement is that a steel bar feeding roller frame is fixedly installed on the top right side of the device body, and the steel bar feeding roller frame is arranged in a cross pattern; a rotating connecting rod fixedly connected to the inner wall of the meshing gear rotates under the drive of the meshing gear, and the rotating connecting rod is rotatably connected to a bearing frame fixedly installed inside the limit slider to ensure the smoothness of rotation.

[0012] By means of the above technical solution, this utility model provides a steel bar bending device for construction engineering, which has at least the following beneficial effects:

[0013] 1. The design of this utility model's bending assembly ensures precise control over the bending of reinforcing bars. When the rotating rod rotates, the connecting rod drives the connecting block to move under the guidance of the limiting slider. The rack plate and the meshing gear precisely mesh, making the rotating connecting rod rotate stably. The reinforcing bar limiting groove on the limiting plate can firmly fix the reinforcing bar. As the rotating connecting rod rotates, the bending angle of the reinforcing bar is precisely controlled. In the feeding assembly, the threaded push rod and the threaded engagement of the connecting ring can finely adjust the reinforcing bar feed amount. This precise control avoids problems such as uneven bending angles and feed position deviations, ensuring the quality of reinforcing bar processing, meeting the strict requirements of modern buildings for high-precision processing of reinforcing bars, and improving the structural stability and safety of buildings.

[0014] 2. This utility model features highly efficient linkage, significantly improving construction efficiency. The drive component, feed component, and bending component of the rebar bending device are closely linked. The drive motor quickly transmits power to the transmission rod through the drive wheel, transmission belt, and transmission wheel, powering the entire device. In the feed component, the operator turns the handle, which drives the threaded push rod to rotate through the drive gear and gear transmission, precisely controlling the connecting ring and the feed roller to achieve rapid and accurate feeding of the rebar. At the same time, the rotating rod of the bending component rotates, driving the rotating ring, connecting rod, and other components to work together to quickly complete the rebar bending. Compared with traditional manual bending or simple equipment, it significantly shortens the rebar processing time, significantly improves construction efficiency, and helps to accelerate the project progress. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a partially enlarged structural schematic diagram of the present invention;

[0020] Figure 4 This is a partial structural diagram of the bending component of this utility model.

[0021] In the diagram: 1. Device body; 2. Connecting mechanism; 21. Drive assembly; 211. Fixing frame; 212. Drive motor; 213. Drive wheel; 214. Transmission belt; 215. Transmission wheel; 216. Transmission rod; 22. Bending assembly; 221. Rotating rod; 222. Rotating ring; 223. Connecting rod; 224. Connecting block; 225. Limiting slider; 226. Rack plate; 227. Meshing gear; 228. Rotating connecting rod; 229. Limiting disc; 23. Feed assembly; 231. Rotary handle; 232. Connecting rotating rod; 233. Drive gear; 234. Gear; 235. Fixing plate; 236. Threaded push rod; 237. Connecting ring; 238. Connecting pull rod; 239. Feed roller. Detailed Implementation

[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] Example 1:

[0024] Traditional rebar bending methods have many drawbacks, severely restricting construction efficiency and project quality. Manual bending not only consumes a lot of manpower and time, but also makes it difficult to guarantee bending accuracy, greatly affecting the operator's skill level and resulting in inconsistent bending angles. This fails to meet the stringent requirements of modern construction for rebar processing precision. Some simple bending equipment has limited functions, only capable of simple straight-line bending, and is powerless to handle the bending needs of complex-shaped rebars. Furthermore, it lacks precision in rebar feed control, easily leading to unstable feed speed and positional deviations, further affecting the bending effect. This embodiment provides a rebar bending device for construction engineering. Please refer to... Figures 1-4An embodiment provides a steel bar bending device for construction engineering, including a device body 1, a connecting mechanism 2, a driving component 21 disposed in the middle section of the device body 1, a bending component 22 disposed in the middle section of the device body 1, and a feeding component 23 disposed in the left section of the device body 1; the bending component 22 includes a rotating rod 221 rotatably connected to the inner wall of the device body 1, a rotating ring 222 fixedly connected to the outer wall of the rotating rod 221, a connecting rod 223 fixedly connected to the outer wall of the rotating ring 222, a connecting block 224 hinged to the other end of the connecting rod 223, a limiting slider 225 slidably connected to the connecting block 224, a rack plate 226 fixedly connected to the outer wall of the connecting rod 223, a meshing gear 227 meshing with the rack plate 226, a rotating connecting rod 228 fixedly connected to the inner wall of the meshing gear 227, and a limiting disk 229 fixedly connected to the top of the rotating connecting rod 228.

[0025] In this embodiment, the bending assembly 22 completes the bending operation of the reinforcing bar. The rotating rod 221 is rotatably connected to the inner wall of the device body 1, and the rotating ring 222 fixedly connected to its outer wall rotates with the rotation of the rotating rod 221. The connecting rod 223 fixedly connected to the outer wall of the rotating ring 222 makes a circular motion under the drive of the rotating ring 222. The connecting block 224 hinged to the other end of the connecting rod 223 moves under the drive of the connecting rod 223. The connecting block 224 is slidably connected to the limiting slider 225. The limiting slider 225 limits and guides the movement of the connecting block 224, ensuring that the connecting block 224 moves according to a predetermined trajectory. The rack plate 226 fixedly connected to the outer wall of the connecting rod 223 moves with the movement of the connecting rod 223. The rack plate 226 meshes with the meshing gear 227. The linear motion of the rack plate 226 is converted into the rotation of the meshing gear 227. The rotating connecting rod 228, which is fixedly connected to the inner wall of the meshing gear 227, rotates under the drive of the meshing gear 227. The rotating connecting rod 228 is rotatably connected to the bearing bracket fixedly installed inside the limiting slider 225 to ensure the smoothness of rotation. The limiting plate 229, which is fixedly connected to the top of the rotating connecting rod 228, is provided with a rebar limiting groove. When the rebar is placed in the rebar limiting groove of the limiting plate 229, the limiting plate 229 drives the rebar to perform a bending operation as the rotating connecting rod 228 rotates, thereby achieving precise bending of the rebar. By controlling the rotation angle and speed of the rotating rod 221, the bending angle and shape of the rebar can be adjusted to meet the diverse needs of different construction projects for rebar bending.

[0026] Furthermore, the rotating connecting rod 228 is rotatably connected to the bearing frame fixedly installed inside the limiting slider 225, and the limiting plate 229 is provided with a steel bar limiting groove; a steel bar feeding roller frame is fixedly installed on the top right side of the device body 1, and the steel bar feeding roller frame is arranged in a cross pattern.

[0027] Furthermore, driven by the meshing gear 227, the rotating connecting rod 228 is rotatably connected to the bearing bracket fixedly installed inside the limiting slider 225 to ensure the smoothness of rotation; the limiting plate 229 fixedly connected to the top of the rotating connecting rod 228 is provided with a rebar limiting groove; when the rebar is placed in the rebar limiting groove of the limiting plate 229, as the rotating connecting rod 228 rotates, the limiting plate 229 drives the rebar to perform a bending operation, thereby achieving precise bending of the rebar.

[0028] Example 2:

[0029] Based on Embodiment 1, the drive assembly 21 includes a fixed frame 211 fixedly connected to the top of the device body 1. A drive motor 212 is fixedly mounted on the top of the fixed frame 211. A drive wheel 213 is fixedly connected to the outer wall of the output shaft of the drive motor 212. The drive wheel 213 is connected to a transmission wheel 215 via a transmission belt 214. A transmission rod 216 is fixedly connected to the inner wall of the transmission wheel 215. The feed assembly 23 includes a connecting rod 232 rotatably connected to the outer wall of the device body 1. A handle 231 is fixedly connected to the outer end of the connecting rod 232. A drive gear 233 is fixedly connected to the outer wall of the connecting rod 232. The drive gear 233 meshes with a gear 234. A fixed plate 235 is fixedly connected to the outer end of the gear 234. A threaded push rod 236 is rotatably connected to the inner wall of the fixed plate 235. A connecting ring 237 is threadedly connected to the outer wall of the threaded push rod 236. A connecting pull rod 238 is rotatably connected to the outer end of the connecting ring 237. A feed roller 239 is rotatably connected to the connecting pull rod 238.

[0030] In this embodiment, the drive assembly 21 provides power transmission, and the fixing frame 211 is securely connected to the top of the device body 1, providing reliable installation support for the drive motor 212. After the drive motor 212 starts, its output shaft rotates at high speed, driving the drive wheel 213 on the outer wall of the shaft to rotate synchronously. The drive wheel 213 is connected to the transmission wheel 215 through the transmission belt 214, transmitting the power of the drive motor 212 to the transmission wheel 215. The transmission rod 216, which is fixedly connected to the inner wall of the transmission wheel 215, rotates accordingly. The transmission rod 216 is rotatably connected to the inner wall of the device body 1, ensuring the stability and accuracy of power transmission. The rotation of the transmission rod 216 provides a power source for the subsequent feeding assembly 23 and bending assembly 22, realizing the linkage operation of the entire device. The feeding assembly 23 achieves precise feeding of the rebar. The connecting rod 232 is rotatably connected to the outer wall of the device body 1, and the handle 231 at its outer end facilitates manual rotation of the connecting rod 232 by the operator. The drive gear 233, which is fixedly connected to the outer wall of the connecting rod 232, connects the connecting rod 232 to the outer wall of the device body 1. When rotating, they rotate together, driving gear 233 and gear 234 mesh with each other, converting the rotation of connecting rod 232 into the rotation of gear 234; the fixed plate 235 fixedly connected to the outer end of gear 234 is displaced as gear 234 rotates, and the threaded push rod 236 rotatably connected to the inner wall of fixed plate 235 rotates under the drive of fixed plate 235; the connecting ring 237 threadedly connected to the outer wall of threaded push rod 236 moves along the axial direction of threaded push rod 236 when threaded push rod 236 rotates due to the action of the thread, and the connecting pull rod 238 rotatably connected to the outer end of connecting ring 237 transmits the linear motion of connecting ring 237 to feed roller 239; the feed roller 239 slides on the top of device body 1, and by adjusting the position of feed roller 239, the precise control of the feed speed and position of the steel bar can be achieved; the operator can flexibly adjust the feed amount of steel bar by rotating handle 231 according to the actual needs of steel bar bending, ensuring that the steel bar can accurately reach the designated position during the bending process.

[0031] Furthermore, the transmission rod 216 is rotatably connected to the inner wall of the device body 1, and the other end is fixed to one end of the back of the connecting rod 232; the feed roller 239 is slidably connected to the top of the device body 1.

[0032] Furthermore, the transmission rod 216, which is fixedly connected to the inner wall of the transmission wheel 215, rotates accordingly. The transmission rod 216 is rotatably connected to the inner wall of the device body 1, ensuring the stability and accuracy of power transmission. The rotation of the transmission rod 216 provides a power source for the subsequent feeding assembly 23 and bending assembly 22, realizing the coordinated operation of the entire device. The feeding assembly 23 achieves precise feeding of steel bars. The connecting rod 232 is rotatably connected to the outer wall of the device body 1, and the handle 231 at its outer end allows the operator to manually rotate the connecting rod 232. The drive gear 233, which is fixedly connected to the outer wall of the connecting rod 232, rotates together with the connecting rod 232 when it rotates. The drive gear 233 and the gear 234 mesh with each other.

[0033] Working principle: The drive assembly 21 provides power transmission, and the fixed frame 211 is firmly connected to the top of the device body 1, providing reliable mounting support for the drive motor 212. After the drive motor 212 starts, its output shaft rotates at high speed, driving the drive wheel 213 on the outer wall of the shaft to rotate synchronously. The drive wheel 213 is connected to the transmission wheel 215 through the transmission belt 214, transmitting the power of the drive motor 212 to the transmission wheel 215. The transmission rod 216, which is fixedly connected to the inner wall of the transmission wheel 215, rotates accordingly. The transmission rod 216 is rotatably connected to the inner wall of the device body 1, ensuring the stability and accuracy of power transmission. The rotation of the transmission rod 216 provides a power source for the subsequent feed assembly 23 and bending assembly 22, realizing the coordinated operation of the entire device.

[0034] The feeding assembly 23 enables precise feeding of reinforcing bars. A connecting rod 232 is rotatably connected to the outer wall of the device body 1, and its outer end has a handle 231 for easy manual rotation by the operator. A drive gear 233 is fixedly connected to the outer wall of the connecting rod 232, rotating together with it. The drive gear 233 meshes with a gear 234, converting the rotation of the connecting rod 232 into the rotation of the gear 234. A fixing plate 235 is fixedly connected to the outer end of the gear 234, displacing as the gear 234 rotates. A threaded push rod 236, rotatably connected to the inner wall of the fixing plate 235, rotates under the drive of the fixing plate 235. The connecting ring 237, threaded to the outer wall of rod 236, moves along the axial direction of threaded push rod 236 when the threaded push rod 236 rotates due to the action of the thread. The connecting rod 238, rotatably connected to the outer end of the connecting ring 237, transmits the linear motion of the connecting ring 237 to the feed roller 239. The feed roller 239 slides on the top of the device body 1. By adjusting the position of the feed roller 239, precise control of the feed speed and position of the steel bar can be achieved. The operator can flexibly adjust the feed amount of the steel bar by rotating the handle 231 according to the actual needs of steel bar bending, ensuring that the steel bar can accurately reach the designated position during the bending process.

[0035] The bending assembly 22 completes the steel bar bending operation. The rotating rod 221 is rotatably connected to the inner wall of the device body 1, and the rotating ring 222 fixedly connected to its outer wall rotates with the rotation of the rotating rod 221. The connecting rod 223 fixedly connected to the outer wall of the rotating ring 222 makes a circular motion under the drive of the rotating ring 222. The connecting block 224 hinged to the other end of the connecting rod 223 moves under the drive of the connecting rod 223. The connecting block 224 is slidably connected to the limiting slider 225. The limiting slider 225 plays a limiting and guiding role in the movement of the connecting block 224, ensuring that the connecting block 224 moves according to the predetermined trajectory. The rack plate 226 fixedly connected to the outer wall of the connecting rod 223 moves with the movement of the connecting rod 223. The rack plate 226 meshes with the meshing gear 227, which engages with the rack. The linear motion of plate 226 is converted into the rotation of meshing gear 227; the rotating connecting rod 228, which is fixedly connected to the inner wall of meshing gear 227, rotates under the drive of meshing gear 227. The rotating connecting rod 228 is rotatably connected to a bearing bracket fixedly installed inside the limiting slider 225 to ensure the smoothness of rotation; the limiting plate 229, which is fixedly connected to the top of the rotating connecting rod 228, is provided with a rebar limiting groove; when the rebar is placed in the rebar limiting groove of the limiting plate 229, the limiting plate 229 drives the rebar to perform a bending operation as the rotating connecting rod 228 rotates, thereby achieving precise bending of the rebar; by controlling the rotation angle and speed of the rotating rod 221, the bending angle and shape of the rebar can be adjusted to meet the diverse needs of different construction projects for rebar bending.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel bar bending device for construction engineering, comprising a device body (1), characterized in that: The device body (1) is provided with a connecting mechanism (2), the connecting mechanism (2) includes a driving component (21) disposed in the middle section of the device body (1), a bending component (22) disposed in the middle section of the device body (1), and a feeding component (23) disposed in the left section of the device body (1). The bending assembly (22) includes a rotating rod (221) rotatably connected to the inner wall of the device body (1). A rotating ring (222) is fixedly connected to the outer wall of the rotating rod (221). A connecting rod (223) is fixedly connected to the outer wall of the rotating ring (222). A connecting block (224) is hinged to the other end of the connecting rod (223). A limit slider (225) is slidably connected to the connecting block (224). A rack plate (226) is fixedly connected to the outer wall of the connecting rod (223). A meshing gear (227) is engaged with the rack plate (226). A rotating connecting rod (228) is fixedly connected to the inner wall of the meshing gear (227). A limit plate (229) is fixedly connected to the top of the rotating connecting rod (228).

2. The steel bar bending device for construction engineering according to claim 1, characterized in that: The drive assembly (21) includes a fixed frame (211) fixedly connected to the top of the device body (1). A drive motor (212) is fixedly installed on the top of the fixed frame (211). A drive wheel (213) is fixedly connected to the outer wall of the output shaft of the drive motor (212). The drive wheel (213) is driven by a transmission wheel (215) via a transmission belt (214). A transmission rod (216) is fixedly connected to the inner wall of the transmission wheel (215).

3. The steel bar bending device for construction engineering according to claim 1, characterized in that: The feeding assembly (23) includes a connecting rod (232) rotatably connected to the outer wall of the device body (1). A handle (231) is fixedly connected to the outer end of the connecting rod (232). A drive gear (233) is fixedly connected to the outer wall of the connecting rod (232). The drive gear (233) meshes with a gear (234). A fixing plate (235) is fixedly connected to the outer end of the gear (234). A threaded push rod (236) is rotatably connected to the inner wall of the fixing plate (235). A connecting ring (237) is threadedly connected to the outer wall of the threaded push rod (236). A connecting pull rod (238) is rotatably connected to the outer end of the connecting ring (237). A feed roller (239) is rotatably connected to the connecting pull rod (238).

4. A steel bar bending device for construction engineering according to claim 1, characterized in that: The rotating connecting rod (228) is rotatably connected to the bearing frame fixedly installed inside the limiting slider (225), and the limiting plate (229) is provided with a steel bar limiting groove.

5. A steel bar bending device for construction engineering according to claim 2, characterized in that: The transmission rod (216) is rotatably connected to the inner wall of the device body (1), and the other end is fixed to the back end of the connecting rod (232).

6. A steel bar bending device for construction engineering according to claim 3, characterized in that: The feed roller (239) is slidably connected to the top of the device body (1).

7. A steel bar bending device for construction engineering according to claim 1, characterized in that: The device body (1) has a steel bar feeding roller frame fixedly installed on the top right side, and the steel bar feeding roller frame is arranged in a cross pattern.

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