A method for assembling a compartment floor of a life support vehicle

Abstract

The present invention relates to a method for assembling a carriage floor of a life support vehicle. The method is based on a carriage floor assembly device, wherein the carriage floor assembly device includes a plurality of hammers arranged in parallel laterally, wherein the plurality of hammers are respectively driven by corresponding hammer driving devices, and all the hammers are driven by corresponding moving devices so as to be movable forward and backward. The assembly method comprises: establishing a blank canvas, dividing the canvas into N*M square areas; extracting areas in the square areas that overlap with the orthographic projection image of the skeleton; gluing corresponding masks to the skeleton to form a carriage floor, and positioning the carriage floor on the carriage floor assembly device; driving the hammers by the moving device to traverse the long side direction of the skeleton in a stepwise manner, and after each step, if the overlapping area exists below the hammers, driving the corresponding hammers by the hammer driving device to strike the masks.

Description

Technical Field

[0001] The present invention relates to the field of life support vehicle assembly, and in particular to a method for assembling a compartment floor of a life support vehicle. Background Art

[0002] Outdoor scenarios such as disaster emergency rescue, military operations, power and communications repair require support for cooking, camping, and emergency rescue equipment to meet the needs of rescuers working in the field around the clock. Life support vehicles integrate cooking, camping, field rescue, lighting, communications, and vehicle mobility to meet the needs of all-weather field operations.

[0003] The floor of the life support vehicle Figure 1 As shown, the vehicle consists of a frame, outer panels, and inner panels. The frame serves as the primary structural support for the vehicle floor. The inner and outer panels are glued to the frame's upper and lower surfaces, respectively. After the inner and outer panels are glued to the frame, a worker gently taps the panels to expel the air between them and the frame, or uses a heavy object to press them together to ensure full contact. Conventional methods use a rubber hammer to manually perform this tapping. On the one hand, there are many hollow parts in the skeleton. If the hollow parts are knocked, the gap between the main part of the skeleton and the mask will increase. At the same time, when the vibration generated by the knocking of the hollow parts is transmitted to the space between the main part and the mask, a certain amount of air will be introduced, which makes the bonding effect between the skeleton and the mask worse. On the other hand, if the method of heavy pressing is adopted, the life support vehicle has different areas for different application scenarios, such as cooking areas, camping areas, etc. The load-bearing and working environment of different areas are different. For example, the cooking area is prone to moisture, and a stainless steel inner mask is required. The camping area generally has a lower load-bearing capacity, and an aluminum inner mask can be used. Since the thickness of the masks made of different materials is different, an auxiliary plate needs to be prepared before pressing to make the upper end surface of the mask flush.

[0004] The purpose of the present invention is to design a method for assembling the car floor of a life support vehicle in response to the above-mentioned problems in the prior art. Summary of the Invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a method and device for assembling the compartment floor of a life support vehicle, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A method for assembling a carriage floor of a life support vehicle is based on a carriage floor assembly device, wherein the carriage floor assembly device includes a plurality of hammers arranged in parallel in a transverse direction, wherein the plurality of hammers are respectively driven by corresponding hammer driving devices, and all of the hammers are driven by corresponding moving devices so as to be movable forward and backward;

[0008] The assembly method comprises:

[0009] Create a blank canvas, divide the canvas into N*M square areas, obtain the orthographic projection image of the skeleton and fill it into the blank canvas, where N is the number of hammers and M is the number of steps required for the moving device to drive the hammer to traverse the long side of the skeleton;

[0010] Extracting the area in the square area that overlaps with the orthographic projection image of the skeleton;

[0011] Gluing the corresponding panels to the frame to form a carriage floor, and positioning the carriage floor on the carriage floor assembly device;

[0012] The moving device drives the hammer to traverse the long side direction of the frame in a stepping manner. After each step, if there is an overlapping area below the hammer, the hammer driving device drives the corresponding hammer to knock the mask.

[0013] Furthermore, extracting the area in the square area that overlaps with the orthographic projection image of the skeleton includes: establishing a two-dimensional coordinate system, obtaining integer point coordinates corresponding to each of the square areas, and extracting an overlapping coordinate set of the area in the square area that overlaps with the orthographic projection image of the skeleton, wherein the overlapping coordinate set is an integer point coordinate set;

[0014] The method for determining whether the overlapping area exists below the hammer is as follows:

[0015] The stepping distance of the mobile device is the length of the long side of the skeleton / M. The hammers are numbered from 1 to N along one of the coordinate axes, and the travel distance of the mobile device is numbered from 1 to M along the other coordinate axis. The coordinates (n, m) of all the hammers at different positions are obtained, where n is from 1 to N and m is from 1 to M.

[0016] After each step of the hammer, if the coordinates (n, m) of the position of the hammer include coordinates belonging to the overlapping coordinate set, it is determined that the overlapping area exists below the hammer.

[0017] Furthermore, the hammer driving device is rotated by a corresponding hammer rotating device, and the bottom end of the hammer is a long strip structure.

[0018] Furthermore, after extracting the area in the square area that overlaps with the orthographic projection image of the skeleton, performing: shape analysis on the overlapping area to obtain contours of the skeleton in the overlapping area, performing line segment fitting on each contour to obtain extension direction angles of the skeleton in the overlapping area;

[0019] Before the hammer driving device drives the corresponding hammer to strike the mask, the following steps are performed: according to the extending direction angle, the hammer is rotated by the hammer rotating device.

[0020] Further, according to the extension direction angle, rotating the hammer by the hammer rotating device includes:

[0021] If one or more line segments are obtained after line segment fitting of the contour, and the directions of the line segments are the same, the hammer is rotated by the hammer rotating device so that the bottom end of the hammer is in the same direction as the line segments;

[0022] If more than two line segments are obtained after line segment fitting of the contour, and the directions of the line segments are different, the hammer is rotated by the hammer rotating device so that the bottom end of the hammer is parallel to the long side or short side of the skeleton.

[0023] Furthermore, the hammer body includes:

[0024] An outer shell having a cylindrical structure;

[0025] The hammer head is a cylindrical structure and is disposed in the outer shell. The bottom end of the hammer head protrudes below the bottom end of the outer shell, and a gap is set between the hammer head and the top end of the outer shell.

[0026] An airbag is arranged between the hammer head and the outer shell, and is used to drive the hammer head to move up and down to achieve a knocking action.

[0027] Furthermore, an elastic member is provided between the top end of the hammer head and the top end of the outer shell, and the elastic member is used to drive the hammer head to reset upward after the airbag is deflated.

[0028] Furthermore, the carriage floor device includes a receiving platform, and positioning mechanisms are provided at the four corners of the receiving platform, and the positioning mechanisms are used to position the carriage floor on the carriage floor assembly device.

[0029] Therefore, the present invention provides the following effects and / or advantages:

[0030] The present invention uses a vehicle floor assembly device and a corresponding image processing method to accurately knock on the position of the skeleton beam above the mask, thereby improving the gluing effect.

[0031] The present invention processes the orthographic projection image of the skeleton, divides it into multiple square areas, calculates the appearance of the skeleton in each area, and dynamically encodes the coordinates of the hammer body, so as to judge whether there is a bone beam part of the skeleton below the hammer body at different positions of the hammer body.

[0032] The present invention performs line segment extraction and direction angle analysis on the part of the skeleton's orthographic projection image in the square area, thereby identifying the extension direction of the skeleton's bone beams in each area, thereby controlling the rotation direction of the hammer body, making the long strip direction of the bottom end of the hammer body adapt to the extension direction of the skeleton below the hammer body, and improving the knocking effect.

[0033] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0034] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of the carriage floor.

[0036] Figure 2 A schematic diagram of the skeleton structure.

[0037] Figure 3 Schematic diagram of the canvas created for this method.

[0038] Figure 4 This is a schematic diagram of the orthographic projection image of the skeleton obtained by this method in the canvas.

[0039] Figure 5 for Figure 4 A partial enlarged schematic diagram.

[0040] Figure 6 This is a schematic diagram showing an example of the calculation results of the extension direction angle.

[0041] Figure 7 It is a structural schematic diagram of the vehicle floor assembly device of the present invention.

[0042] Figure 8 for Figure 7 Schematic diagram from another perspective.

[0043] Figure 9 It is a structural schematic diagram of the hammer and hammer rotating device.

[0044] Figure 10 A cross-sectional view of the hammer. DETAILED DESCRIPTION

[0045] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments and the accompanying drawings:

[0046] refer to Figure 3-10A method for assembling a floor panel of a life support vehicle is based on a floor panel assembly device. The floor panel assembly device includes a plurality of hammers 3 arranged in parallel in a transverse direction. The plurality of hammers 3 are driven by corresponding hammer driving devices (not shown). All the hammers 3 are driven by corresponding moving devices 4 so as to be movable forward and backward.

[0047] The assembly method comprises:

[0048] S1, creating a blank canvas, dividing the canvas into N*M square areas, obtaining an orthographic projection image of the skeleton and filling the blank canvas with it, where N is the number of hammers, and M is the number of steps required for the mobile device to drive the hammer to traverse the long side of the skeleton;

[0049] In this step, the orthographic projection image of the skeleton is as follows Figure 2 The result obtained by processing S1 is shown in Figure 3. In this embodiment, the number of hammers is 11, so N = 11, the canvas is evenly divided into 11 rows in the vertical direction, the number of steps is 36 times, so M = 36, the canvas is evenly divided into 36 splits in the horizontal direction, thus dividing the canvas into 11*36 square areas.

[0050] S2, extracting the area in the square area that overlaps with the orthographic projection image of the skeleton;

[0051] The overlapping area can be extracted through image algorithms, for example, by adjusting the resolution of the skeleton's orthographic projection image to N*M, binarizing the skeleton's orthographic projection image with N*M resolution through binarization, adjusting the binarization threshold, and taking the binarization result with a calculation result of 1 as the overlapping area.

[0052] Alternatively, it can be implemented according to the following description.

[0053] Extracting the area in the square area that overlaps with the orthographic projection image of the skeleton includes: establishing a two-dimensional coordinate system, obtaining integer point coordinates corresponding to each of the square areas, and extracting an overlapping coordinate set of the area in the square area that overlaps with the orthographic projection image of the skeleton, wherein the overlapping coordinate set is an integer point coordinate set;

[0054] like Figure 4 As shown, in this embodiment, the coordinates of the upper right corner of the square area are used as the coordinates of the whole point corresponding to the square area. Figure 4 The lower left area in is used as an example. The overlapping area is as follows Figure 4 The shaded part is shown in . Then, the overlapping coordinate sets are (4, 1), (4, 2), (4, 3), (4, 4), (3, 1), (3, 3), (3, 4), (2, 1), (2, 3), (1, 1), (1, 2), (1, 3), (1, 4).

[0055] The method for determining whether the overlapping area exists below the hammer is as follows:

[0056] The stepping distance of the mobile device is the length of the long side of the skeleton / M. The hammers are numbered from 1 to N along one of the coordinate axes, and the travel distance of the mobile device is numbered from 1 to M along the other coordinate axis. The coordinates (n, m) of all the hammers at different positions are obtained, where n is from 1 to N and m is from 1 to M.

[0057] After each step of the hammer, if the coordinates (n, m) of the position of the hammer include coordinates belonging to the overlapping coordinate set, it is determined that the overlapping area exists below the hammer.

[0058] In the above, we obtain the overlapping coordinate set. In this step, we further determine whether there is an overlapping area under the hammer. In this step, we first number the hammers, 1, 2, 3...N. Then, when the hammer is in the initial position, that is, the distance traveled by the hammer is 0, then M = 1, and the coordinates (n, m) of the hammer are (1, 1), (2, 1), (3, 1), ... (N, 1); when the distance traveled by the hammer is one step length, then M = 2, and the coordinates (n, m) of the hammer are (1, 2), (2, 2), (3, 2), ... (N, 2); and so on.

[0059] The larger the M setting is, the greater the gluing effect obtained by the hammer hitting the mask after the method is executed.

[0060] The coordinates of the hammer at each step are now obtained. The presence of an overlapping area below the hammer can be determined by determining whether the coordinates of the hammer at each position match those in the overlapping coordinate set. By dynamically setting the hammer's coordinates, the desired striking position can be determined as the hammer moves.

[0061] S3, gluing the corresponding panels to the frame to form a carriage floor, and positioning the carriage floor on the carriage floor assembly device;

[0062] S4, driving the hammer by the moving device to traverse the long side direction of the skeleton in a stepping manner. After each step, if there is an overlapping area below the hammer, the hammer driving device drives the corresponding hammer to strike the mask.

[0063] In step S2, the position that needs to be struck when the hammer moves can be obtained. In this step, the hammer is controlled to move a certain distance each time in the long side direction of the skeleton. The distance can be the width of the hammer, and then a complete movement is achieved in the length direction of the skeleton. Accurately strike at various positions above the skeleton to ensure that the mask and the skeleton are fully glued together.

[0064] Furthermore, the hammer driving device is rotated by a corresponding hammer rotating device, and the bottom end of the hammer is a long strip structure.

[0065] Furthermore, the hammer body 3 includes:

[0066] The outer shell 301 is a cylindrical structure;

[0067] The hammer head 302 is a cylindrical structure and is disposed in the outer shell 301. The bottom end of the hammer head 302 protrudes below the bottom end of the outer shell 301. A gap is set between the hammer head 302 and the top end of the outer shell 301. The bottom end of the hammer head 302 is set as a long strip structure.

[0068] The airbag 303 is disposed between the hammer head 302 and the outer shell 301 , and is used to drive the hammer head 302 to move up and down to achieve a striking action.

[0069] In this embodiment, the bottom end of the hammer body 302 is an elongated structure. The purpose is that the structure of the skeleton is generally an elongated structure. The shape of the bottom end of the hammer body 302 can adapt to the shape of each beam in the skeleton, preventing the hammer body 302 with a protruding elongated shape from hitting a position other than the beam of the skeleton during the hammering process, generating oscillation and introducing air into the surrounding glued positions.

[0070] Furthermore, after extracting the area in the square area that overlaps with the orthographic projection image of the skeleton, performing: shape analysis on the overlapping area to obtain contours of the skeleton in the overlapping area, performing line segment fitting on each contour to obtain extension direction angles of the skeleton in the overlapping area;

[0071] Before the hammer driving device drives the corresponding hammer to strike the mask, the following steps are performed: according to the extending direction angle, the hammer is rotated by the hammer rotating device 6 .

[0072] In this embodiment, Hough transform can be used to detect the line segment portion of the contour, and then the angle between the line segment and the X-axis or Y-axis is calculated to serve as the extension direction angle of the skeleton in the overlapping area. The result is as follows: Figure 6 shown.

[0073] In order to adapt to the extension direction of the skeleton, this embodiment further rotates the hammer through the hammer rotating device 6, so that the direction of the long strip structure at the lower end of the hammer can be changed to make it the same as or compatible with the extension direction of each bone beam of the skeleton, thereby reducing the knocking on the hollow part of the skeleton.

[0074] Further, according to the extension direction angle, rotating the hammer by the hammer rotating device includes:

[0075] If one or more line segments are obtained after line segment fitting of the contour, and the directions of the line segments are the same, the hammer is rotated by the hammer rotating device so that the bottom end of the hammer is in the same direction as the line segments;

[0076] If more than two line segments are obtained after line segment fitting of the contour, and the directions of the line segments are different, the hammer is rotated by the hammer rotating device so that the bottom end of the hammer is parallel to the long side or short side of the skeleton.

[0077] In this embodiment, since the skeleton is composed of multiple beams, the beams appear as double solid lines after the above-mentioned contour calculation. Therefore, if fitting yields one or more line segments, and if several of these line segments are oriented in the same direction, it is determined that a beam passes through the location, and all beams are oriented in the same direction. In this case, the bottom end of the hammer can be rotated to the same direction as the beam. If fitting yields two or more line segments, and if several of these line segments are oriented in different directions, it indicates that multiple beams are present at the location, and the beams may even intersect at that location. In this case, the bottom end of the hammer can be rotated to a fixed direction, such as the front-to-back direction or the left-to-right direction, without any specific adjustment.

[0078] Furthermore, an elastic member 304 is provided between the top of the hammer head 302 and the top of the outer shell 301 , and the elastic member 304 is used to drive the hammer head 302 to reset upward after the airbag 303 is deflated.

[0079] In this embodiment, the airbag 303 is inflated to cause the airbag 303 to move the hammer head 302 downward. The hammer head 302 needs to be repeatedly moved up and down to achieve the striking process. Therefore, the hammer head 302 needs to be quickly raised after the airbag 303 is deflated. In this embodiment, the elastic member 304 is provided to pull the hammer head 302 upward after the airbag 303 is deflated. In this embodiment, the elastic member 304 is a spring.

[0080] Furthermore, the carriage floor device includes a receiving platform 1, and positioning mechanisms 101 are provided at the four corners of the receiving platform 1. The positioning mechanisms 101 are used to position the carriage floor on the carriage floor assembly device.

[0081] In this embodiment, the positioning mechanism 101 is a bolt, which is moved downward by screwing the bolt, thereby supporting the panel above the home platform 1.

[0082] Further provided is a vehicle floor assembly device for a life support vehicle, comprising:

[0083] Undertaking platform 1;

[0084] A hammer mounting frame 2, wherein the hammer mounting frame 2 is connected to the receiving platform 1 by a track so as to be reciprocating in the long side direction of the receiving platform 1;

[0085] A plurality of hammer bodies 3 are arranged in parallel on the hammer body mounting frame 2 in a transverse direction. The hammer bodies 3 include an outer shell 301, a hammer head 302, and an air bag 303. The outer shell 301 is a cylindrical structure. The hammer head 302 is a cylindrical structure and is arranged in the outer shell 301. The bottom end of the hammer head 302 protrudes below the bottom end of the outer shell 301. A gap is set between the top of the hammer head 302 and the outer shell 301. The air bag 303 is arranged between the hammer head 302 and the outer shell 301. The air bag 303 is used to drive the hammer head 302 to move up and down to achieve a striking action.

[0086] The hammer driving device (not shown) is used to drive the airbag 303 to inflate or deflate, thereby driving the hammer 302 to move up and down. In this embodiment, the hammer driving device is an air pump, thereby driving the airbag 303 to inflate or deflate.

[0087] The moving device 4 is used to drive the hammer mounting frame 2 to move.

[0088] Furthermore, the hammer body 3 is rotated by a corresponding hammer body rotating device 6 , and the bottom end of the hammer body 302 is a long strip structure.

[0089] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third etc. does not indicate any order. These words may be interpreted as names.

[0090] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0091] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0092] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

Claims

1. A method for assembling a compartment floor of a life support vehicle, characterized in that: Based on the carriage floor assembly device, the carriage floor assembly device includes a plurality of hammers arranged in parallel laterally, each of the hammers is driven by a corresponding hammer driving device, and all of the hammers are driven by a corresponding moving device so as to be movable forward and backward; The assembly method comprises: Create a blank canvas, divide the canvas into N*M square areas, obtain the orthographic projection image of the skeleton and fill it in the blank canvas, where N is the number of hammers and M is the number of steps required for the mobile device to drive the hammer to traverse the long side of the skeleton; Extracting the area in the square area that overlaps with the orthographic projection image of the skeleton; Gluing the corresponding panels to the frame to form a carriage floor, and positioning the carriage floor on the carriage floor assembly device; The moving device drives the hammer to traverse the long side direction of the frame in a stepping manner. After each step, if there is an overlapping area below the hammer, the hammer driving device drives the corresponding hammer to knock the mask.

2. The method for assembling a compartment floor of a life support vehicle according to claim 1, characterized in that: Extracting the area in the square area that overlaps with the orthographic projection image of the skeleton includes: establishing a two-dimensional coordinate system, obtaining integer point coordinates corresponding to each of the square areas, and extracting an overlapping coordinate set of the area in the square area that overlaps with the orthographic projection image of the skeleton, wherein the overlapping coordinate set is an integer point coordinate set; The method for determining whether the overlapping area exists below the hammer is as follows: The stepping distance of the mobile device is the length of the long side of the skeleton / M. The hammers are numbered from 1 to N along one of the coordinate axes, and the travel distance of the mobile device is numbered from 1 to M along the other coordinate axis. The coordinates (n, m) of all the hammers at different positions are obtained, where n is from 1 to N and m is from 1 to M. After each step of the hammer, if the coordinates (n, m) of the position of the hammer include coordinates belonging to the overlapping coordinate set, it is determined that the overlapping area exists below the hammer.

3. The method for assembling a compartment floor of a life support vehicle according to claim 1, characterized in that: The hammer driving device is rotated by a corresponding hammer rotating device, and the bottom end of the hammer is a long strip structure.

4. The method for assembling a compartment floor of a life support vehicle according to claim 3, characterized in that: After extracting the area in the square area that overlaps with the orthographic projection image of the skeleton, performing the following steps: performing shape analysis on the overlapping area to obtain contours of the skeleton in the overlapping area, and performing line segment fitting on each contour to obtain extension direction angles of the skeleton in the overlapping area; Before the hammer driving device drives the corresponding hammer to strike the mask, the following steps are performed: according to the extending direction angle, the hammer is rotated by the hammer rotating device.

5. The method for assembling a compartment floor of a life support vehicle according to claim 4, characterized in that: According to the extension direction angle, rotating the hammer by the hammer rotating device includes: If one or more line segments are obtained after line segment fitting of the contour, and the directions of the line segments are the same, the hammer is rotated by the hammer rotating device so that the bottom end of the hammer is in the same direction as the line segments; If more than two line segments are obtained after line segment fitting of the contour, and the directions of the line segments are different, the hammer is rotated by the hammer rotating device so that the bottom end of the hammer is parallel to the long side or short side of the skeleton.

6. The method for assembling a vehicle floor panel of a life support vehicle according to claim 1, characterized in that: The hammer body comprises: An outer shell having a cylindrical structure; The hammer head is a cylindrical structure and is disposed in the outer shell. The bottom end of the hammer head protrudes below the bottom end of the outer shell, and a gap is set between the hammer head and the top end of the outer shell. An airbag is arranged between the hammer head and the outer shell, and is used to drive the hammer head to move up and down to achieve a knocking action.

7. The method for assembling a vehicle floor panel of a life support vehicle according to claim 6, characterized in that: An elastic member is provided between the top end of the hammer head and the top end of the outer shell, and the elastic member is used for driving the hammer head to reset upward after the airbag is deflated.

8. The method for assembling a vehicle floor panel of a life support vehicle according to claim 1, characterized in that: The carriage floor assembly device includes a receiving platform, and positioning mechanisms are provided at the four corners of the receiving platform. The positioning mechanisms are used to position the carriage floor on the carriage floor assembly device.

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