Backdoor adjusting tool and calibration gauge

Abstract

The utility model relates to the technical field of automobile assembly, in particular to a back door adjusting tool and a calibration gauge, the back door adjusting tool comprises a tool body, a telescopic piece, a detection piece, a profiling block and a fixing device, the telescopic piece, the detection piece and the profiling block are all installed on the face, away from an automobile body, of the tool body, and the fixing device is installed on the tool body. The tool body is provided with a telescopic piece, the telescopic end of the telescopic piece faces the direction where a back door is located, the telescopic end of the telescopic piece is provided with an abutting piece used for abutting against the back door, the telescopic end of the telescopic piece is connected with the detection piece, the shape of the profiling block is the same as that of the automobile A lamp, and the fixing device is installed on the face, close to the automobile body, of the tool body. According to the utility model, the automobile back door can be accurately adjusted and positioned, the efficiency and the quality of automobile assembly are effectively improved, and errors caused by manual measurement and adjustment are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile assembly, and more particularly to a back door adjustment tool and a calibration check fixture. Background Art

[0002] Adjusting the tailgate is a crucial task during automobile assembly. Accurate installation of the tailgate is crucial to the overall appearance and functionality of the vehicle. The tailgate and the A-lamp located at the rear of the vehicle require a gap between them to ensure a consistent visual effect and clearance between the tailgate and the A-lamp when closed. However, traditional tailgate adjustment methods often rely on manual experience, requiring workers to use a gap gauge for measurement. This method requires data calculation and judgment after measurement to determine whether the gap between the tailgate and the A-lamp is within the required error range. This measurement method is inefficient and cumbersome. Furthermore, due to the subjectivity of manual measurement, there may be deviations in the measurement position and readings, which can easily lead to measurement errors. This can result in an uneven gap between the tailgate and the A-lamp, necessitating offline repairs and wasting a significant amount of work time. Therefore, there is an urgent need for a tool that can improve the accuracy and efficiency of tailgate adjustment. Utility Model Content

[0003] In order to solve the problems of low efficiency, complicated process and easy measurement errors in the existing measurement technology, the utility model provides a tailgate adjustment tool and calibration fixture, which can achieve precise adjustment and positioning of the car tailgate, effectively improve the efficiency and quality of car assembly, and reduce the errors of manual measurement and adjustment.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a tailgate adjustment tool, including a tool body, a telescopic part, a detection part, a profiling block and a fixing device, the telescopic part, the detection part and the profiling block are all installed on the side of the tool body away from the vehicle body, the telescopic end of the telescopic part is facing the direction of the tailgate, the telescopic end of the telescopic part is provided with a contact part for abutting against the tailgate, the telescopic end of the telescopic part is connected to the detection part, the profiling block has the same shape as the car A-light, and the fixing device is installed on the side of the tool body close to the vehicle body.

[0005] In this technical solution, since the A-light is not yet installed on the vehicle body during tailgate installation, the positional relationship between the tailgate and the A-light is difficult to visually observe. Therefore, a profiling block is provided on the tool body. The profiling block is shaped like the A-light and serves as a reference for the A-light during tailgate assembly. The tool body is also provided with a fixture for securing the tool body to the vehicle body at the location where the A-light is installed. This fixture prevents positional shifting during tailgate assembly, which could lead to measurement errors. During tailgate assembly, the tool body is first secured to the vehicle body using the fixture. The profiling block on the tool body is then used to roughly determine the tailgate's position. A telescopic member is provided on the tool body, with its telescopic end facing the direction of the tailgate and an abutment provided on the telescopic end. Even after roughly determining the tailgate's position by referring to the profiling block on the tool body, it is not possible to fully confirm that the gap between the tailgate and the A-light meets the required requirements. The car's back door is brought close to the hole pile body, and the car's back door abuts against the abutment. As the position of the car's back door changes, the position of the abutment also changes. The change in the position of the abutment can reflect the size of the gap between the car's back door and the A-light. Therefore, the abutment is connected to the detection part, and the change in the position of the abutment can be detected by the detection part and intuitively reflected to the staff. The staff can fine-tune the position of the car's back door in real time by observing the detection part until the information reflected on the detection part meets the matching requirements of the car's back door and the A-light. The abutment is connected to the telescopic end of the telescopic part. On the one hand, the telescopic part can adapt to the change in the position of the abutment through telescopic adjustment. On the other hand, the telescopic part fixes the position of the abutment, so that the abutment can only move along the telescopic direction of the telescopic part, and the movement trajectory of the abutment is determined to ensure that the data of the detection part will not be erroneous due to the deviation of the movement direction of the abutment during the movement of the abutment. The telescopic part, the detection part and the profiling block are all installed on the side of the tool body away from the vehicle body, while only the fixing device is provided on the side close to the vehicle body, ensuring that the fixing device can be directly connected to the vehicle body when the tool body is installed, and the cooperation between the tool body and the vehicle body will not be interfered with by the telescopic part, the detection part and the profiling block.

[0006] Preferably, the detection component includes a vernier and a main scale, the main scale is fixedly mounted on the tool body, the main scale is parallel to the telescopic component, the vernier is slidably mounted on the main scale, and the vernier is fixedly connected to the abutment component.

[0007] Preferably, an electronic display is also provided on the cursor.

[0008] Preferably, the tool body is further provided with a power supply and a display screen for displaying the power level, the display screen is electrically connected to the power supply, and the power supply is electrically connected to the electronic display.

[0009] Preferably, the telescopic member includes a telescopic rod and an outer tube, the telescopic rod is inserted into the outer tube, the end of the telescopic rod protruding from the outer tube is the telescopic end, the abutment member is fixedly mounted on the telescopic rod, and an elastic member is further provided inside the outer tube, and the two ends of the elastic member are respectively abutted against the telescopic rod and the outer tube.

[0010] Preferably, the fixing device includes a positioning pin that can be inserted into the process hole on the vehicle body and a positioning block that can abut against the vehicle body. The positioning pin and the positioning block are both fixedly mounted on the tooling body, and at least two positioning pins are provided.

[0011] Preferably, the positioning block is made of a magnetic material structure.

[0012] The utility model also provides a calibration inspection tool, comprising a base plate, a mounting structure provided on the base plate, the mounting structure being detachably connected to the above-mentioned back door adjustment tooling, and a calibration piece further provided on the base plate.

[0013] In this technical solution, the tailgate adjustment tool itself will also have certain errors during long-term use. In order to ensure the accuracy of the tailgate adjustment tool, it is necessary to use a calibration fixture to calibrate and zero the tailgate adjustment tool before assembling the tailgate. When calibration is required, the tailgate adjustment tool is fixed to a mounting structure located on a base plate. The base plate is provided with a calibration part. The calibration part is set with reference to the standard position between the car tailgate and the A-light. After the tailgate adjustment tool is installed, the abutment part is abutted against the calibration part. At this time, the position of the abutment part is the zero point position. Then, the detection part is zeroed here to complete the calibration of the tailgate adjustment tool.

[0014] Preferably, the mounting structure includes a first mounting block and a second mounting block, both of which are mounted on the substrate, the first mounting block is provided with a mounting hole for inserting the positioning pin, and the second mounting block can abut against the positioning block.

[0015] Preferably, the calibration part includes a first mounting column and a second mounting column, the first mounting column is vertically mounted on the upper surface of the base plate, the end of the first mounting column away from the base plate is hinged to one end of the second mounting column, and the other end of the second mounting column is provided with a back door profiling block that can cooperate with the profiling block and a second abutment member that can abut against the abutment member.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, a fixing device is provided for fixing the tool body to the vehicle body to avoid the position of the tool body from being offset during the assembly of the back door. A profiling block is provided on the tool body to simulate the A lamp matching the back door. An abutment is provided to abut the back door, and the position of the abutment reflects the position of the back door and then reflects the size of the gap between the back door and the A lamp. The abutment is connected to the detection part, and the position information of the abutment is reflected to the staff in real time and intuitively through the detection part. A telescopic part is provided, and the abutment is installed at the telescopic end of the telescopic part to ensure that the abutment moves along the telescopic direction of the telescopic part and ensure that the abutment does not deviate in the moving direction. A calibration fixture is also provided to detect, calibrate and zero the back door adjustment tool to ensure the accuracy of the back door adjustment tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the back door adjustment tool of the utility model;

[0018] Figure 2 This is a three-dimensional diagram of the back door adjustment tool of the present invention from another perspective;

[0019] Figure 3 It is a three-dimensional diagram of the calibration fixture of the utility model.

[0020] In the accompanying drawings: 1. tool body; 2. telescopic part; 3. detection part; 4. profiling block; 5. fixing device; 6. power supply; 7. base plate; 8. mounting structure; 9. calibration part; 10. back door adjustment tool; 21. abutment part; 22. telescopic rod; 23. outer cylinder; 31. cursor; 32. main scale; 33. electronic display; 51. positioning pin; 52. positioning block; 61. display screen; 81. first mounting block; 82. second mounting block; 91. first mounting column; 92. second mounting column; 93. back door profiling block; 94. second abutment part. DETAILED DESCRIPTION

[0021] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0022] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Example 1

[0025] like Figure 1As shown, a tailgate adjustment tool comprises a tool body 1, a telescopic member 2, a detection member 3, a profiling block 4, and a fixing device 5. The telescopic member 2, the detection member 3, and the profiling block 4 are all mounted on the side of the tool body 1 away from the vehicle body, with the telescopic end of the telescopic member 2 facing the direction of the tailgate. The telescopic end of the telescopic member 2 is provided with an abutment member 21 for abutting the tailgate. The telescopic end of the telescopic member 2 is connected to the detection member 3. The profiling block 4 has the same shape as the A-light of the vehicle. The fixing device 5 is mounted on the side of the tool body 1 close to the vehicle body. Because the A-light is not yet installed on the vehicle body during tailgate installation, it is difficult to visually observe the positional relationship between the tailgate and the A-light. Therefore, the tool body 1 is provided with a profiling block 4. The profiling block 4 is configured according to the shape of the A-light of the vehicle and can serve as a reference for the A-light during tailgate assembly. The tool body 1 is provided with a fixing device 5 for fixing the tool body 1 to the position on the vehicle body for installing the A-light. Fixing device 5 ensures that the tailgate assembly process does not cause positional deviations that could lead to measurement errors. When assembling a car's tailgate, the fixture body 1 is first secured to the vehicle body using fixture 5. The tailgate's position is then roughly determined by referring to the contour block 4 located on the fixture body 1. The fixture body 1 is provided with a telescopic member 2, the telescopic end of which faces the direction of the tailgate and is provided with an abutment member 21. Even after roughly determining the tailgate's position by referring to the contour block 4 on the fixture body 1, it is not entirely certain that the gap between the tailgate and the A-light meets the requirements. The car back door is brought close to the hole pile body, and the car back door abuts against the abutment 21. As the position of the car back door changes, the position of the abutment 21 also changes. The change in the position of the abutment 21 can reflect the size of the gap between the car back door and the A-light. Therefore, the abutment 21 is connected to the detection member 3. The change in the position of the abutment 21 can be detected by the detection member 3 and intuitively reflected to the staff. The staff can then fine-tune the position of the car back door in real time by observing the detection member 3 until the information reflected on the detection member 3 meets the matching requirements of the car back door and the A-light. The abutment 21 is connected to the telescopic end of the telescopic member 2. On the one hand, the telescopic member 2 can adapt to the change in the position of the abutment 21 by telescoping. On the other hand, the telescopic member 2 fixes the position of the abutment 21 so that the abutment 21 moves along the telescopic direction of the telescopic member 2, and the movement trajectory of the abutment 21 is determined. It is ensured that during the movement of the abutment 21, the movement direction of the abutment 21 will not be offset, causing errors in the data of the detection member 3. The telescopic part 2, the detection part 3 and the profiling block 4 are all installed on the side of the tool body 1 away from the vehicle body, while only the fixing device 5 is provided on the side close to the vehicle body, ensuring that the fixing device 5 can be directly connected to the vehicle body when the tool body 1 is installed, and the cooperation between the tool body 1 and the vehicle body will not be interfered with by the telescopic part 2, the detection part 3 and the profiling block 4.

[0026] like Figure 1 As shown, the detection member 3 includes a vernier 31 and a main scale 32. The main scale 32 is fixedly mounted on the tool body 1 and is parallel to the telescopic member 2. The vernier 31 is slidably mounted on the main scale 32. The vernier 31 is fixedly connected to the abutment 21. The vernier 31 and the main scale 32 form a structure similar to a vernier caliper, wherein the vernier 31 can slide on the main scale 32. The vernier 31 is connected to the abutment 31. The position information of the abutment 31 can be reflected by the movement of the vernier 31 on the main scale 32. The main scale 32 can be provided with a scale along the length direction. When working, the staff can directly judge the position of the abutment 21 by the scale line on the main scale 32 corresponding to the vernier 31, and then judge whether the gap between the car back door and the A-light meets the assembly requirements and make dynamic adjustments.

[0027] like Figure 1 As shown, the cursor 31 is also provided with an electronic display 33. The electronic display 33 intuitively displays the position of the cursor 31 on the main scale 32, eliminating the need for manual reading or estimation, thereby ensuring accurate position detection of the abutment member 21. Furthermore, the electronic display 33 is also provided with a zero adjustment button, which allows the position of the cursor 31 to be adjusted to zero as needed.

[0028] like Figure 1 As shown, the tool body 1 is also provided with a power supply 6 and a display screen 61 for displaying the power level. The display screen 61 is electrically connected to the power supply 6, which is in turn electrically connected to the electronic display 33. The power supply 6 provides an independent power source for the electronic display 33, allowing the electronic display 33 to operate independently of the power cord. The display screen 61 is used to display the remaining power level in the power supply 6, making it easier for personnel to replace or recharge the power supply 6 in a timely manner.

[0029] like Figure 1As shown, the telescopic member 2 includes a telescopic rod 22 and an outer cylinder 23. The telescopic rod 22 is inserted into the outer cylinder 23, with the end of the telescopic rod 22 protruding from the outer cylinder 23 being the telescopic end. The abutment 21 is fixedly mounted on the telescopic rod 22. The outer cylinder 23 is also provided with an elastic member, with the ends of the elastic member abutting the telescopic rod 22 and the outer cylinder 23, respectively. During the back door assembly process, to ensure that the detector 3 can accurately reflect the back door's position information, it is necessary to ensure that the abutment 21 abuts the back door. When the back door moves toward the tooling body 1, the abutment 21 drives the telescopic rod 22 to retract into the outer cylinder 23. When the back door moves away from the tooling body 1, because its movement direction is opposite to the direction of the abutment 21 and the abutment 21 itself lacks the driving force to drive the abutment 21 into contact with the back door, the back door and the abutment 21 lose contact, and the abutment 21 cannot accurately reflect the back door's position. Therefore, an elastic member is required within the inner cylinder 23, with its ends abutting the inner cylinder 23 and the telescopic rod 22, respectively. As the back door moves toward the tool body 1, the elastic member deforms to accommodate the telescopic rod 22 and retracts into the outer cylinder 23. This deformation generates a force that pushes the telescopic rod 22 outward. As the back door moves away from the tool body 1, the elastic member forces the telescopic rod 22 to extend from the outer cylinder 23, driving the abutment 21 on the telescopic rod 22 away from the tool body 1, ensuring that the abutment 21 remains in contact with the back door.

[0030] Example 2

[0031] This embodiment is similar to the above embodiment 1, except that Figure 2 As shown, the fixing device 5 includes a positioning pin 51 that can be inserted into the process hole on the vehicle body and a positioning block 52 that can abut against the vehicle body. The positioning pin 51 and the positioning block 52 are both fixedly mounted on the tool body 1, and at least two positioning pins 51 are provided. The positioning pin 51 is used to determine the position of the tool body 1, and is fixed by inserting it into the process hole on the vehicle body, which is convenient for fixing and disassembly. A single positioning pin 51 cannot completely fix the tool body 1, and the tool body 1 may still rotate around a single positioning pin 51, so at least two positioning pins 51 are provided. The positioning pin 51 cannot determine the position of the tool body 1 along the length direction of the positioning pin 51, so a positioning block 52 is also required. The positioning block 52 can determine the position of the tool body 1 in this direction by abutting against the surface of the vehicle body.

[0032] like Figure 2As shown, the positioning block 52 is constructed of magnetic material. This ensures a close fit with the vehicle surface, thereby improving the positioning accuracy of the tooling body 1 on the vehicle. The use of magnetic material also simplifies the installation and removal of the positioning block 52, as it easily adheres to the metal surface of the vehicle without the need for additional fixings. Furthermore, the magnetic positioning block 52 is less susceptible to wear during use, resulting in a long service life and allowing for quick replacement when needed.

[0033] Example 3

[0034] like Figure 3 As shown, a calibration inspection tool includes a substrate 7, on which a mounting structure 8 is provided. The mounting structure 8 is detachably connected to the back door adjustment tool 10 in the above-mentioned embodiments 1 and 2, and a calibration part 9 is also provided on the substrate 7. During long-term use, the back door adjustment tool 10 itself will also have certain errors. In order to ensure the accuracy of the back door adjustment tool 10, it is necessary to use a calibration inspection tool to calibrate and zero the back door adjustment tool 10 before assembling the back door. When calibration is required, the back door adjustment tool 10 is fixed to the mounting structure 8 located on the substrate 7. The calibration part 9 is provided on the substrate 7. The calibration part 9 is set with reference to the standard position between the back door and the A-light of the car. After the back door adjustment tool 10 is installed, the abutment 21 is made to abut against the calibration part 9. At this time, the position of the abutment 21 is the zero point position, and then the detection part 3 is zeroed here to complete the calibration of the back door adjustment tool 10.

[0035] like Figure 3 As shown, the mounting structure 8 includes a first mounting block 81 and a second mounting block 82. The first mounting block 81 and the second mounting block 82 are both mounted on the base plate 7. The first mounting block 81 is provided with a mounting hole for inserting the positioning pin 51, and the second mounting block 82 can abut against the positioning block 52. The first mounting block 81 and the second mounting block 82 are arranged with reference to the vehicle body, wherein the first mounting block 81 is provided with a mounting hole with reference to the process hole on the vehicle body, and the positioning pin 51 can be inserted into the mounting hole. The surface of the second mounting block 82 is arranged with reference to the outer surface of the vehicle body and can abut against the positioning block 52. The first mounting block 81 and the second mounting block 82 together simulate the scene where the tailgate adjustment tool 10 is fixed to the vehicle body.

[0036] like Figure 3As shown, the calibration member 9 includes a first mounting post 91 and a second mounting post 92. The first mounting post 91 is vertically mounted on the upper surface of the base plate 7. The end of the first mounting post 91 away from the base plate 7 is hinged to one end of the second mounting post 92. The other end of the second mounting post 92 is provided with a back door profiling block 93 that can cooperate with the profiling block 4 and a second abutment member 94 that can abut against the abutment member 21. The first mounting post 91 and the second mounting post 92 are hingedly connected. When the back door adjustment tool 10 needs to be placed or removed, the second mounting post 92 can be rotated to make way for the back door adjustment tool 10. After the back door adjustment tool 10 is installed, the second mounting post 92 is rotated back to its original position. The end of the second mounting post 92 away from the first mounting post 91 is equipped with a back door profiling block 93 and a second abutment member 94. The back door profiling block 93 is designed with reference to the back door of an automobile and can be matched with the profiling block 4 on the back door adjustment tool 10 to simulate the working scene of the back door adjustment tool 10. The second abutment member 94 is set with reference to the standard position of the back door of an automobile. When the second abutment member 94 abuts the abutment member 21, the abutment member 21 is in the standard position. At this time, the staff zeroes the detection member 3 and sets it to the zero position. During the subsequent assembly of the back door of the automobile, the value displayed by the detection member 3 is the difference between the automobile and the standard position.

[0037] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A back door adjustment tool, characterized in that: The invention comprises a tool body (1), a telescopic member (2), a detection member (3), a profiling block (4) and a fixing device (5), wherein the telescopic member (2), the detection member (3) and the profiling block (4) are all mounted on a side of the tool body (1) away from the vehicle body, the telescopic end of the telescopic member (2) faces the direction of the back door, the telescopic end of the telescopic member (2) is provided with an abutting member (21) for abutting against the back door, the telescopic end of the telescopic member (2) is connected to the detection member (3), the profiling block (4) has the same shape as the A-light of a car, and the fixing device (5) is mounted on a side of the tool body (1) close to the vehicle body.

2. The tailgate adjustment tool according to claim 1, characterized in that: The detection member (3) comprises a cursor (31) and a main scale (32); the main scale (32) is fixedly mounted on the tool body (1); the main scale (32) is parallel to the telescopic member (2); the cursor (31) is slidably mounted on the main scale (32); and the cursor (31) is fixedly connected to the abutting member (21).

3. The tailgate adjustment tool according to claim 2, characterized in that: An electronic display (33) is also provided on the cursor (31).

4. The tailgate adjustment tool according to claim 3, characterized in that: The tool body (1) is also provided with a power supply (6) and a display screen (61) for displaying the power level. The display screen (61) is electrically connected to the power supply (6), and the power supply (6) is electrically connected to the electronic display (33).

5. The tailgate adjustment tool according to claim 1, characterized in that: The telescopic member (2) comprises a telescopic rod (22) and an outer cylinder (23), wherein the telescopic rod (22) is inserted into the outer cylinder (23), and one end of the telescopic rod (22) protruding from the outer cylinder (23) is the telescopic end. The abutment member (21) is fixedly mounted on the telescopic rod (22), and an elastic member is further provided inside the outer cylinder (23), with both ends of the elastic member abutting against the telescopic rod (22) and the outer cylinder (23), respectively.

6. The tailgate adjustment tool according to claim 1, characterized in that: The fixing device (5) comprises a positioning pin (51) that can be inserted into a process hole on the vehicle body and a positioning block (52) that can abut against the vehicle body. The positioning pin (51) and the positioning block (52) are both fixedly mounted on the tooling body (1). At least two positioning pins (51) are provided.

7. The tailgate adjustment tool according to claim 6, characterized in that: The positioning block (52) is made of a magnetic material.

8. A calibration fixture, characterized in that: The invention comprises a base plate (7), a mounting structure (8) is provided on the base plate (7), the mounting structure (8) is detachably connected to the tailgate adjustment tool (10) according to any one of claims 1 to 7, and a calibration piece (9) is also provided on the base plate (7).

9. The calibration fixture according to claim 8, characterized in that: The mounting structure (8) comprises a first mounting block (81) and a second mounting block (82), wherein the first mounting block (81) and the second mounting block (82) are both mounted on the substrate (7), the first mounting block (81) is provided with a mounting hole for inserting the positioning pin (51), and the second mounting block (82) can abut against the positioning block (52).

10. The calibration fixture according to claim 8, characterized in that: The calibration member (9) includes a first mounting column (91) and a second mounting column (92), wherein the first mounting column (91) is vertically mounted on the upper surface of the base plate (7), an end of the first mounting column (91) away from the base plate (7) is hinged to one end of the second mounting column (92), and the other end of the second mounting column (92) is provided with a back door profiling block (93) that can cooperate with the profiling block (4) and a second abutting member (94) that can abut against the abutting member (21).

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