Steel plate pre-bending device

Abstract

The utility model belongs to the technical field of steel plate pre-bending in the orthopedics department, and particularly relates to a steel plate pre-bending device. Comprising two pressing arms which swing in an up-down opening and closing mode, the two pressing arms are hinged to each other, a supporting roller is arranged at the hinged position of the two pressing arms, bending arms are fixed to the bending ends of the pressing arms, through grooves which are communicated front and back are formed in the bending arms, and sliding blocks which only slide up and down are arranged in the through grooves. A bending roller matched with the supporting roller to bend the steel plate is arranged on the front side wall of the sliding block, a threaded column is fixed to the rear side wall of the sliding block and sleeved with a locking rotary knob in threaded fit with the threaded column, and the abutting end of the locking rotary knob abuts against the rear side wall of the bending arm. According to the steel plate bending device, the bending roller moves in the direction of the sliding groove by loosening and tightening the locking knob, so that the bending roller is adjusted to be away from or close to the supporting roller, and then the pressing arm is pressed to bend steel plates with different arc lengths at a time.

Description

Technical Field

[0001] The utility model belongs to the technical field of orthopedic steel plate pre-bending, in particular to a steel plate pre-bending device. Background Art

[0002] With the continuous advancement of medical technology, the plate pre-bending device used in orthopedic surgery has become more and more mature. The plate pre-bending device pre-bends the plate before surgery to adapt it to the shape of the fracture site, thereby ensuring that the plate can fit the fracture site closely during surgery and provide a stable fixation effect.

[0003] However, there is usually a problem in the existing steel plate pre-bending device design: the spacing between the two bending rollers cannot be adjusted, which means that during the bending process of the steel plate, the length of the arc is fixed each time. Perhaps by moving the position of the steel plate and folding it multiple times, arcs of different lengths can be folded, but it is impossible to fold the required length of the steel plate arc at one time. Utility Model Content

[0004] The utility model aims to provide a steel plate pre-bending device which can be used to bend steel plates with different arc lengths at one time.

[0005] The steel plate pre-bender comprises two pressure arms which swing up and down, the two pressure arms are hinged to each other, a support roller is arranged at the hinge of the two pressure arms, a bending arm is fixed to the bending end of each pressure arm, a through groove which communicates front and back is arranged on the bending arm, a slider which is limited to sliding up and down is arranged in the through groove, a bending roller which cooperates with the support roller to bend the steel plate is arranged on the front side wall of the slider, a threaded column is fixed on the rear side wall of the slider, a locking knob which is threadedly matched with the threaded column is mounted on the threaded column, and the tightening end of the locking knob rests on the rear side wall of the bending arm.

[0006] Furthermore, a fixed shaft is fixed on the front side wall of the sliding block, the bending roller is independently sleeved on the fixed shaft, and the front end of the fixed shaft is connected to a first limiting nail to prevent the bending roller from detaching.

[0007] Furthermore, a first hinge block is fixed on the inner side wall of one pressure arm, and two second hinge blocks distributed front to back are fixed on the inner side wall of the other pressure arm, the first hinge block is located between the two second hinge blocks, and hinge holes on the same center line are opened on the first hinge block and the second hinge block, a support roller is arranged on the front side of the first hinge block, and a hinge column is independently installed in the center hole of the support roller; one end of the hinge column passes through the center hole of the support roller to fix a limiting block, and the other end thereof passes through the hinge hole and is connected with a second limiting nail, and the nut of the second limiting nail rests on the second hinge block located on the rear side.

[0008] Furthermore, a first threaded hole is formed at the front end of the fixed shaft, and a stud of the first limiting nail is inserted into the first threaded hole and threadably matched therewith.

[0009] Furthermore, the limiting block is fixed at the front end of the hinge column, and a second threaded hole is provided at the rear end of the hinge column. The stud of the second limiting nail is installed in the second threaded hole and threadably matched therewith.

[0010] Furthermore, the slider is a rectangular block.

[0011] Furthermore, a plurality of anti-slip grooves distributed along the circumference of the locking knob are provided on the side wall of the locking knob.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model enables the bending roller to move along the direction of the slide groove through the loosening and locking knob, so as to adjust the bending roller to be away from or close to the supporting roller, and then presses the pressing arm to bend the steel plates with different arc lengths at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0016] Figure 3 It is a three-dimensional structural diagram of the utility model in use state;

[0017] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0018] Figure 5 It is the exploded structure diagram of the utility model;

[0019] The names of the components in the figure are: 1. Pressing arm; 2. Support roller; 3. First limit pin; 4. Bending arm; 5. Bending roller; 6. Limit block; 7. Locking knob; 8. First hinge block; 9. Second limit pin; 10. Second hinge block; 11. Fixed shaft; 12. Slider; 13. Threaded column; 100. Steel plate. DETAILED DESCRIPTION

[0020] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0021] Example

[0022] A steel plate pre-bending device described in this embodiment, such as Figure 1 As shown, it includes two pressing arms 1 that swing up and down, and the pressing arm 1 is divided into a pressing end and a bending end. The part that needs to be pressed is the pressing end, and the pressing end is located at the right end of the pressing arm 1. It needs to be opened to the upper and lower sides at a certain angle to leave enough pressing space. The bending end is located at the left end of the pressing arm 1. The two pressing arms 1 are hinged to each other, and a supporting roller 2 is provided at the hinge of the two pressing arms 1. The hinge point of the two pressing arms 1 is located a little to the right of the bending end of the pressing arm 1, and the supporting roller 2 is located there as the main supporting component for the bent steel plate 100.

[0023] like Figure 1 and Figure 5 As shown, the bending ends of the pressing arm 1 are fixed with bending arms 4, the two bending arms 4 are on the same vertical line and are both in a vertical state, the bending arms 4 are provided with a through slot communicating front and back, a slider 12 limited to sliding up and down is provided in the through slot, the slider 12 is a rectangular block, the left and right side walls of the slider 12 fit with the left and right groove walls of the slide groove, so that it can slide up and down smoothly. The bending arm 4 and the pressing arm 1 are integrally formed.

[0024] like Figures 1 to 3 As shown, a bending roller 5 for cooperating with the supporting roller 2 to bend the steel plate 100 is provided on the front side wall of the slider 12, a fixed shaft 11 is fixed on the front side wall of the slider 12, the bending roller 5 is independently mounted on the fixed shaft 11, and the front end of the fixed shaft 11 is connected to a first limiting nail 3 for preventing the bending roller 5 from detaching; a first threaded hole is provided at the front end of the fixed shaft 11, and the stud of the first limiting nail 3 is inserted into the first threaded hole and threadedly matched with the first limiting nail 3; after the first limiting nail 3 is connected to the fixed shaft 11, the nut of the first limiting nail 3 is located at the front end of the fixed shaft 11, limiting the bending roller 5 from detaching from the fixed shaft 11, so that the position of the bending roller 5 can be adjusted by sliding the slider 12 in the slide groove.

[0025] like Figure 2 and Figure 5As shown, a threaded column 13 is fixed on the rear side wall of the slider 12, and a locking knob 7 threadedly matched therewith is mounted on the threaded column 13, and the tightening end of the locking knob 7 rests on the rear side wall of the bending arm 4; a plurality of anti-slip grooves distributed along the circumference of the locking knob 7 are provided on the side wall of the locking knob 7, which is convenient for rotating the locking knob 7, and a third threaded hole passing through the locking knob 7 is provided at the center of the locking knob 7, and the threaded column 13 is installed in the third threaded hole and threadedly matched therewith. When in use, the locking knob 7 is rotated to rest against the rear side wall of the bending arm 4 to lock the current position of the bending roller 5. A limiting ring is fixed between the fixed shaft 11 and the slider 12, and the limiting ring rests against the front side wall of the bending arm 4. When in use, after being locked by the locking knob 7, the limiting ring is clamped on the bending arm 4 to generate friction and lock it in the current position. At the same time, the bending roller 5 is independently mounted on the fixed shaft 11 and can rotate freely during the bending process of the steel plate 100. The bending rollers 5 on the two bending arms 4 are both adjustable. When in use, the spacing between the two bending rollers 5 is adjusted to achieve different arc lengths for the orthopedic steel plate 100. The slider 12 is a rectangular block that fits the slide groove, and the locking knob 7 will not cause other parts to rotate when rotating. A screwdriver slot is provided on the nut of the first limiting nail 3 to facilitate the screwdriver to rotate it.

[0026] like Figure 2 , Figure 4 and Figure 5As shown, a first hinge block 8 is fixed on the inner side wall of one pressure arm 1, and two second hinge blocks 10 distributed front and back are fixed on the inner side wall of the other pressure arm 1. The first hinge block 8 is located between the two second hinge blocks 10. The first hinge block 8 and the second hinge block 10 are both provided with hinge holes on the same center line. A support roller 2 is provided on the front side of the first hinge block 8, and a hinge column is independently installed in the center hole of the support roller 2; one end of the hinge column passes through the center hole of the support roller 2 to fix the limit block 6, and the other end thereof passes through the hinge hole to be connected with the second limit pin 9, and the nut of the second limit pin 9 rests on the second hinge block 10 located at the rear side. The first hinge block 8 and the second hinge block 10 are both circular structures, and they are fixed on their respective pressure arms 1 through the inner plate, and the hinge hole is located at the center of the first hinge block 8 and the second hinge block 10. The hinge column and the limit block 6 can be set as one body. The limit block 6 is a circular structure. During production, a countersunk hole is opened at the front end of the bending roller 5 with the center of the bending roller 5 as the center of the circle, and the limit block 6 is located in the countersunk hole. The limit block 6 is fixed to the front end of the hinge column, and a second threaded hole is opened at the rear end of the hinge column. The stud of the second limit pin 9 is installed in the second threaded hole and threadedly matched with it; when in use, the rear end of the limit column is closed by the second limit pin 9, and the pressure arm 1 swings with each other with the hinge column as the hinge point. During production, the second hinge block 10 is set as one body with the pressure arm 1 located at the upper side, and the first hinge block 8 is set as one body with the pressure arm 1 located at the lower side, so that the structure is more stable. Screwdriver grooves can also be opened on the nuts of the limit block 6 and the second limit pin 9 to facilitate the rotation of the screwdriver to complete disassembly or installation.

[0027] like Figure 3 As shown, there is a certain gap between the support roller 2 and the bending roller 5 to facilitate the placement of the steel plate 100.

[0028] During actual use, loosen the locking knob 7, and the slider 12 slides along the slide groove to adjust the bending roller 5 away from or close to the supporting roller 2. After the position adjustment is completed, tighten the locking knob 7 to make it rest against the rear side wall of the bending arm 4, and cooperate with the limit ring to clamp it on the bending arm 4, thereby locking the current position of the bending roller 5, and then place the steel plate 100 between the supporting roller 2 and the two bending rollers 5, press the pressing arm 1, and the bending arm 4 swings around the hinge column, and the steel plate 100 is bent by the bending roller 5. The farther the two bending rollers 5 are from the supporting roller 2, the longer the arc size of the steel plate 100 folded out at one time. Conversely, the closer the bending roller 5 is to the supporting roller 2, the shorter the arc size of the steel plate 100 folded out at one time. The specific adjustment is made according to the patient's bone condition.

Claims

1. A steel plate pre-bending device, comprising two pressing arms (1) that swing upward and downward, the two pressing arms (1) being hinged to each other, and a supporting roller (2) being arranged at the hinge of the two pressing arms (1), characterized in that: The bending ends of the pressure arms (1) are fixed with bending arms (4), the bending arms (4) are provided with through grooves communicating front and rear, a slider (12) limited to sliding up and down is arranged in the through groove, a bending roller (5) for cooperating with a supporting roller (2) to bend the steel plate (100) is arranged on the front side wall of the slider (12), a threaded column (13) is fixed on the rear side wall of the slider (12), a locking knob (7) threadedly matched with the threaded column (13) is mounted on the threaded column (13), and the tightening end of the locking knob (7) is pressed against the rear side wall of the bending arm (4).

2. The steel plate pre-bending device according to claim 1, characterized in that: A fixed shaft (11) is fixed on the front side wall of the slider (12), the bending roller (5) is independently sleeved on the fixed shaft (11), and the front end of the fixed shaft (11) is connected to a first limiting pin (3) for preventing the bending roller (5) from detaching.

3. The steel plate pre-bending device according to claim 1, characterized in that: A first hinge block (8) is fixed on the inner side wall of one pressure arm (1), and two second hinge blocks (10) distributed front to back are fixed on the inner side wall of the other pressure arm (1). The first hinge block (8) is located between the two second hinge blocks (10). Both the first hinge block (8) and the second hinge block (10) are provided with hinge holes located on the same center line. A support roller (2) is arranged on the front side of the first hinge block (8), and a hinge column is independently installed in the center hole of the support roller (2); one end of the hinge column passes through the center hole of the support roller (2) to fix a limit block (6), and the other end thereof passes through the hinge hole to be connected to a second limit pin (9), and the nut of the second limit pin (9) rests on the second hinge block (10) located at the rear side.

4. The steel plate pre-bending device according to claim 2, characterized in that: A first threaded hole is formed at the front end of the fixed shaft (11), and a stud of the first limiting nail (3) is inserted into the first threaded hole and threadably matched therewith.

5. The steel plate pre-bending device according to claim 3, characterized in that: The limiting block (6) is fixed to the front end of the hinge column, and a second threaded hole is provided at the rear end of the hinge column. The stud of the second limiting nail (9) is inserted into the second threaded hole and threadably matched therewith.

6. The steel plate pre-bending device according to claim 1, characterized in that: The sliding block (12) is a rectangular block.

7. The steel plate pre-bending device according to claim 1, characterized in that: The side wall of the locking knob (7) is provided with a plurality of anti-slip grooves distributed along its circumference.

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