Leg structure of the mounting frame and medical trolley

Abstract

To provide a leg body structure of a stand being light-weight and less shaking even when an installation object installed on the stand is operated for example, and medical trolley.SOLUTION: A leg body structure of a stand comprises a leg body, a support column extending upward from the leg body, and an installation body provided on an upper part of the support column and on which an instrument can be installed. The leg body includes a base having a support column mounting part on which a lower end of the support column is mounted, and ribs formed on the base so as to surround the support column mounting part. The ribs have truss structures, and among the truss structures, a truss structure adjacent to the support column mounting part includes ribs extending radially from the support column mounting part.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a leg structure of a pedestal and a medical trolley.

Background Art

[0002] Medical devices such as electrocardiographs and biometric monitors are transported using dedicated medical trolleys. Medical devices transported using a medical trolley can also be operated while being installed on the medical trolley. Such a medical trolley is described in, for example, Patent Document 1.

[0003] It is desirable for a medical trolley to transport medical devices in a stable state. Therefore, medical trolleys tend to increase in size in order to improve their strength and stability.

[0004] On the other hand, in hospitals and the like, multiple medical trolleys are often used, and a corresponding large storage space is required to store multiple medical trolleys. Therefore, it is desirable to reduce the storage space by configuring the medical trolleys to be stackable.

[0005] Patent Document 1 discloses a medical trolley that realizes space saving during stacking by making a placement portion for placing a medical device displaceable.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Incidentally, the frames of medical trolleys and similar equipment, which are expected to hold heavy devices, require a high-strength leg structure. Furthermore, if the equipment is intended to be operated by users, such as medical devices, the leg structure must not produce any vibrations that would negatively affect operability. Moreover, considering the need for movement, the legs must also be lightweight.

[0008] This invention was made in consideration of the above points, and provides a lightweight leg structure for a frame and a medical trolley that minimizes shaking of the installed object on the frame. [Means for solving the problem]

[0009] One embodiment of the leg structure of the frame of the present invention is: Legs and, A support column extending upward from the aforementioned leg body and An installation body provided on the upper part of the aforementioned support column, on which equipment can be installed, The structure of the leg of a frame having, The aforementioned leg body is A base having a support column mounting portion to which the lower end of the support column is attached, Ribs formed on the base so as to surround the support mounting portion, It has, The ribs have a truss structure, and of the truss structure, the truss structure adjacent to the column mounting portion includes ribs that extend radially from the column mounting portion. [Effects of the Invention]

[0010] According to the present invention, the ribs formed to surround the support column mounting portion are made into a truss structure, and the truss structure adjacent to the support column mounting portion includes ribs extending radially from the support column mounting portion. As a result, even when the base is formed using a lightweight material such as resin, twisting of the base can be suppressed, and a lightweight leg structure for a frame and a medical trolley can be realized that minimizes shaking of the installed object. [Brief explanation of the drawing]

[0011] [Figure 1] Perspective view showing a partially disassembled medical trolley according to an embodiment [Figure 2] Front view of a partially disassembled medical trolley [Figure 3] Perspective view showing a state where a biological information monitor is installed on a medical trolley [Figure 4] Perspective view showing a state where a plurality of medical trolleys are stacked [Figure 5] Side view showing a state where a plurality of medical trolleys are stacked [Figure 6] Plan view of the base seen from below [Figure 7] Perspective view of the base seen obliquely from below [Figure 8] Plan view of the base seen from below when a support column is attached to the base [Figure 9] Perspective view of the base seen obliquely from above [Figure 10] Cross-sectional view of the base cut along its longitudinal direction and by a vertical plane including bolts [Figure 11A] Bottom view showing the truss structure of the embodiment in which simulation is performed [Figure 11B] Bottom view showing the truss structure opposite to the embodiment in which simulation is performed [Figure 11C] Bottom view showing the honeycomb structure in which simulation is performed [Figure 11D] Bottom view showing the vertical and horizontal rib structure in which simulation is performed [Figure 12A] Figure showing the simulation results for the structure of FIG. 11A [Figure 12B] Figure showing the simulation results for the structure of FIG. 11B [Figure 12C] Figure showing the simulation results for the structure of FIG. 11C [Figure 12D] Figure showing the simulation results for the structure of FIG. 11D

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0013] <1> Overall structure Figure 1 is a perspective view showing a partially disassembled medical trolley 10 to which the leg structure of the present invention is applied, and Figure 2 is a front view thereof. Figure 3 is a perspective view showing the medical trolley 10 with the vital signs monitor 1 installed.

[0014] The medical trolley 10 is broadly composed of a leg body 100, a support column 20, and a mounting body 30.

[0015] The leg body 100 has a base 200 and a plurality of branch sections 101 extending in the planar direction from the base 200. The leg body 100 has four branch sections 101. The leg body 100 has a roughly H shape in plan view. A caster 102 is attached to each of the four branch sections 101.

[0016] The support column 20 is erected on the upper part of the leg body 100 and extends upward from the leg body 100. The support column 20 is erected on the upper part of the leg body 100 by screwing it in from below with a bolt 202, with its lower end fitted into a fitting hole 201 formed in the base 200 of the leg body 100.

[0017] The mounting body 30 is attached to the upper end of the support column 20. The mounting body 30 has a mounting portion 40, a gripping portion 50, a hook portion 60, and a support column receiving portion 30a.

[0018] Multiple screw holes 31 are formed on the side surface of the support column receiving portion 30a, extending in the vertical direction. By aligning one of the multiple screw holes 31 with a screw hole 22 formed on the side surface of the support column 20 and fastening it with a screw 32, the mounting body 30 is fixed at a desired height position on the top of the support column 20.

[0019] A medical device such as a vital signs monitor 1 is placed on the upper surface of the mounting section 40 (see Figure 3). The mounting section 40 has screw holes 41 for fixing the mounted medical device to the mounting section 40. In addition, hook mounting holes 42 are formed on the side surface of the mounting section 40 for adding hooks.

[0020] The gripping portion 50 is formed to protrude rearward from the mounting portion 40. In plan view, the gripping portion 50 is roughly U-shaped. The user can move the medical trolley 100 while gripping the gripping portion 50.

[0021] In this specification, the definitions of "front" and "rear" refer to the front and rear as viewed from the direction of travel of the medical trolley 10. On the other hand, in general, the front and rear may also be defined as viewed from the perspective of the medical device placed on the mounting section 40. For example, when using the vital signs monitor 1 shown in Figure 3 as a reference, the direction of the gripping section 50 is the front and the direction of the hook section 60 is the rear. Therefore, when defining the front and rear in this way, one should simply replace "front" with "rear" and vice versa in the specification.

[0022] The hook portion 60 is formed to protrude forward from the mounting portion 40. The hook portion 60 has a plurality of L-shaped hooks 61, 62, and 63. The hook portion 60 is designed to allow various cables connected to medical devices mounted on the mounting portion 40 to be hung, for example.

[0023] Furthermore, in the medical trolley 10 of this embodiment, a basket 80 is attached to the support column 20. The basket 80 is fixed to the support column 20 by screws. The basket 80 can hold, for example, terminals and files used by medical personnel.

[0024] Furthermore, a cable clamp 70 is attached to the support column 30a. The cable clamp 70 is attached by inserting it onto the screw 32 from above. The cable clamp 70 is designed to hold various cables connected to medical equipment, for example, that are mounted on the mounting section 40.

[0025] Furthermore, the legs 100 and the mounting body 30 are made of resin, while the support columns 20 are made of metal such as aluminum. The medical trolley 10 is lightweight because the legs 100 and the mounting body 30 are made of resin.

[0026] <2> Configuration related to stacking Here, the configuration of the leg unit 100 will be explained in detail from a stacking perspective.

[0027] As described above, the leg body 100 has a roughly H shape in plan view. More specifically, two branches 101 form one vertical line of the roughly H shape, the remaining two branches 101 form the remaining vertical line of the roughly H shape, and the base 200 forms a horizontal line of the roughly H shape.

[0028] Furthermore, the upper surface 101a of the branch portion 101 is lower than the lower surface 200b of the base 200. In other words, a step is formed at the connection point between the base 200 and the branch portion 101, and through this step, the base 200 is positioned higher than the branch portion 101.

[0029] As can be seen in Figure 4, when stacking multiple medical trolleys 10-1, 10-2, and 10-3, the branch portion 101 of one adjacent medical trolley 10-1 can be tucked under the base 200 of the other adjacent medical trolley 10-2. As a result, when stacking multiple medical trolleys 10-1, 10-2, and 10-3, the distance between them in the front-to-back direction can be reduced, and in turn, multiple medical trolleys 10-1, 10-2, and 10-3 can be stacked in a more space-saving manner.

[0030] In reality, as can be seen from Figure 3, the branch portions 101 that form the two vertical lines of the roughly H-shape are slightly bent in a V-shape at the position of the base 200. If stacking performance were the only requirement, it would be preferable for the two vertical lines of the H-shape to be straight. However, in this embodiment, the vertical lines of the branch portions 101 are slightly bent. This improves the overall strength of the leg body 100. Therefore, the shape of the leg body 100 in this embodiment achieves a balance between stacking performance and strength.

[0031] Furthermore, as shown in Figure 5, the gripping portion 50 and the hook portion 60 are formed such that the upper surface 50a of the gripping portion 50 is lower than the lower surface 60b of the hook portion 60. In reality, the hook portion 60 is at approximately the same height as the mounting portion 40, while the gripping portion 50 is formed at a lower height than the mounting portion 40.

[0032] As a result, as shown in Figure 5, when stacking multiple medical trolleys 10-1, 10-2, and 10-3, the grip portion 50 of one adjacent medical trolley 10-1 slides under the hook portion 60 of the other adjacent medical trolley 10-2. This reduces the distance between the medical trolleys 10-1, 10-2, and 10-3 in the front-to-back direction when stacking them, allowing for more space-saving stacking.

[0033] Furthermore, the basket 80 attached to the support column 20 is positioned such that, with respect to the forward direction of the medical trolley 10, the lower surface 80b of the front end of the basket 80 is higher than the upper surface 80a of the rear end of the basket 80.

[0034] In this embodiment, a flange portion 81 is formed at the upper opening of the basket 80 so as to protrude forward from the main body of the basket 80 in order to increase the strength of the basket 80, and a hook and storage portion are formed at the upper rear end of the basket 80 so as to protrude rearward from the main body of the basket 80. Therefore, in this embodiment, the lower surface 80b of the flange portion 81 is higher than the upper surface 80a of the hook and storage portion at the rear end of the basket 80.

[0035] As a result, as shown in Figure 5, when stacking multiple medical trolleys 10-1, 10-2, and 10-3, the flange portion 81 of the basket 80 of one adjacent medical trolley 10-1 slides under the hooks and storage compartments of the basket 80 of the other adjacent medical trolley 10-2. This reduces the distance between the medical trolleys 10-1, 10-2, and 10-3 in the front-to-back direction when stacking them, allowing for more space-saving stacking of the multiple medical trolleys 10-1, 10-2, and 10-3.

[0036] In the example of the embodiment, a flange portion 81 is formed at the front of the basket 80, and a hook or storage portion is formed at the rear end of the basket 80. The case described is when the lower surface 80b of the flange portion 81 is higher than the upper surface 80a of the hook or storage portion, but the embodiment is not limited to this. In short, it is sufficient that the lower surface 80b of the protruding portion at the upper front of the basket 80 is higher than the upper surface 80a of the protruding portion at the upper rear end of the basket 80 with respect to the forward direction of the medical trolley 10.

[0037] Furthermore, from a stacking perspective, the baskets should be shaped so that a portion of them overlaps when the gripping parts 50 of adjacent medical trolleys 10-1, 10-2, and 10-3 are tucked into the hook parts 60. This prevents a reduction in the amount of overlap caused by the baskets bumping into each other during stacking.

[0038] <3> Detailed configuration of base 200 The main feature of this invention lies in the structure of the base 200 of the leg body 100, so this structure will be described in detail here.

[0039] Figure 6 is a plan view of the base 200 seen from below. Figure 7 is a perspective view of the base 200 seen from diagonally below. Figure 8 is a plan view of the base 200 seen from below when the support column 20 is attached to the base 200. Figure 9 is a perspective view of the base 200 seen from diagonally above. Figure 10 is a cross-sectional view of the base 200 cut along its longitudinal direction by a vertical plane including the bolt 202. Note that since Figures 6, 7, 9, and 10 show the base 200, the bolt 202 does not actually exist, but for convenience, the bolt 202 is also shown in the figures to clarify its relationship with the base 200.

[0040] As can be seen in Figure 10, a bag-shaped body 210, which serves as a support column attachment part, is formed in the longitudinal center of the base 200 of this embodiment. The bag-shaped body 210 is a bag-shaped frame that conforms to the outer shape of the support column 20. The internal space of the bag-shaped body 210 is a fitting hole 201 into which the support column 20 is fitted. A through hole is formed in the bottom surface of the bag-shaped body 210 through which a bolt 202 is inserted.

[0041] As can be seen from Figures 6-8, the base 200 has truss-structured ribs 220 that surround the bag-shaped body 210.

[0042] The truss structure has ribs parallel to the longitudinal direction of the base 200 (hereinafter referred to as "transverse ribs"), ribs perpendicular to the longitudinal direction (hereinafter referred to as "longitudinal ribs"), and ribs oblique to the longitudinal direction (hereinafter referred to as "oblique ribs").

[0043] As indicated by the reference numerals in Figure 7, the truss structure adjacent to the bag body 210 includes diagonal ribs 221 that extend radially from the bag body 210. One end of these diagonal ribs 221 is connected to the side surface of the bag body 210.

[0044] Of the truss structures, those other than the truss structure adjacent to the bag body 210 include diagonal ribs 222 parallel to the ribs 221 that extend radially from the bag body 210.

[0045] Incidentally, diagonal ribs 222 are always connected to the nodes of diagonal ribs 221. In other words, in the radial direction of the bag body 210, diagonal ribs 221 and 222 are formed in a continuous straight line. Thus, in this embodiment, a truss structure is adopted, and the orientation of the diagonal ribs 221 of the truss structure is optimized so that many ribs are connected to the bag body 210 that holds the support column 20. Furthermore, the truss structure of this embodiment has a point-symmetrical shape around the support column fixing part (i.e., the fixing part by bolt 202) so that deformation of the bag body 210 is suppressed no matter which direction force is applied.

[0046] Furthermore, as indicated by the reference numerals in Figure 6, it is preferable to make the truss size of the truss structure smaller the closer it is to the bag body 210, that is, the smaller the position where the twisting is greater. In the example in Figure 6, the truss size of the truss structure 230a adjacent to the bag body 210 and located in the front-rear direction of the bag body 210 is smaller than the truss size of the other truss structures 230b. By doing so, twisting can be suppressed more effectively.

[0047] Here, the smaller the truss size (the length and width of a single truss structural element), the greater the strength of the truss structure. However, reducing the truss size increases the number of ribs overall, leading to an increase in weight. Taking this into consideration, in this embodiment, by reducing the truss size only of the truss structure 230a, which is adjacent to the bag body 210 and located in the front-rear direction of the bag body 210, which receives large forces from the support column 20 during transportation or when operating the touch panel of the biological information monitor 1, it is possible to prevent twisting of the bag body 210 in the front-rear direction of the base 200 while maintaining the overall weight reduction of the base 200.

[0048] In particular, since twisting of the bag body 210 in the front-to-back direction can be prevented, the front-to-back swaying of the upper end of the support column 20 can be prevented. As a result, when operating medical devices such as the vital signs monitor 1 installed near the upper end of the support column 20, front-to-back swaying can be suppressed, making it easier to view images such as electrocardiogram waveforms or to perform operations such as touch operations. Here, even if the attachment part at the lower end of the support column 20 twists slightly in the front-to-back direction, the upper end of the support column 20 will sway significantly in the front-to-back direction, which can have adverse effects such as making it difficult to examine a patient when vital signs such as electrocardiogram waveforms are displayed, or making it difficult to perform quick and accurate touch operations on a touch panel. According to the configuration of this embodiment, adverse effects on medical work due to such front-to-back swaying can be effectively prevented.

[0049] Furthermore, as shown in Figure 8, the support column 20 is attached to the bottom surface of the bag body 210 by fastening with a bolt 202 via a washer 240. The washer 240 is larger than the bottom surface of the bag body 210 (in other words, it covers the entire bottom surface of the bag body 210). As a result, the torsional force of the support column 20 is absorbed by the entire bag body 210 by the washer 240 and transmitted evenly to the truss structure connected to the bag body 210. Consequently, the truss structure is better able to suppress torsional displacement.

[0050] Furthermore, wobbling caused by the gap (clearance) between the fitting hole 201 of the bag body 210 and the support column 20 can be suppressed by providing a washer 240 that is larger than the bottom surface of the bag body 210 (in other words, covers the entire bottom surface of the bag body 210). To explain in more detail, in order to smoothly insert the support column 20 into the fitting hole 201, the bag body 210 is formed to have a certain amount of gap (clearance) between the fitting hole 201 and the support column 20. When such a gap (clearance) exists, even if the support column 20 is fixed by fastening with bolts 202, the support column 20 will naturally wobble more easily compared to when there is no gap (clearance). However, according to the configuration of this embodiment, the washer 240, which is larger than the bottom surface of the bag body 210 (in other words, covers the entire bottom surface of the bag body 210), can absorb the stress generated when the support column 20 tries to wobble over a large area, and furthermore, it can be evenly distributed throughout the truss structure, so that wobbling caused by gaps (clearances) can be effectively suppressed by the truss structure.

[0051] In this embodiment, the support column 20 is fixed to the bottom surface of the bag body 210 via a washer 240 by screwing a bolt 202 into a screw hole drilled in the lower surface of the support column 20. However, the invention is not limited to this, and for example, a male screw may be provided on the lower surface of the support column 20, and a nut may be screwed onto the male screw that penetrates the bottom surface of the bag body 210 and the washer 240.

[0052] The inventors of this invention investigated, through simulation, what kind of stress is generated when different rib shapes are adopted for the base.

[0053] Figures 11A-11D are bottom views of the base showing the simulated rib shape, and Figures 12A-12D show the simulation results for each of Figures 11A-11D. The simulations were performed under the conditions that the external shape of each base was the same as in the embodiment, and the mounting structure of the support columns to the base was also the same as in the embodiment.

[0054] The simulations were performed for the following cases: when the truss structure of the embodiment is adopted as shown in Figure 11A; when a truss structure including diagonal ribs connecting opposite diagonals from the embodiment is adopted as shown in Figure 11B (i.e., a truss structure in which the diagonal ribs do not extend radially from the support mounting portion); when a honeycomb structure is adopted as shown in Figure 11C; and when only vertical and horizontal ribs are formed instead of a truss structure as shown in Figure 11D.

[0055] In the simulation, the caster 102 was fixed in place, preventing the base 20 from moving, and a force of 5 [N] was applied to the upper end of the support column 20 in the forward direction. As a result, the displacement of the upper end of the support column 20 was 0.35 [mm] in the case of Figure 11A, 0.39 [mm] in the case of Figure 11B, 0.52 [mm] in the case of Figure 11C, and 0.52 [mm] in the case of Figure 11D. This showed that by adopting the configuration of this embodiment (Figure 11A), the displacement at the installation position of the equipment can be kept to a minimum.

[0056] Figures 12A-12D show the stress generated in the base when a force of 5 [N] is applied to the upper end of the support column 20 in the forward direction, represented by varying shades of color. In the figures, the greater the stress, the lighter the shade of color.

[0057] As can be seen from Figure 12A, when the truss structure of this embodiment is adopted, the color of the wall surface in the front-to-back direction of the base is black compared to when other rib shapes are adopted, indicating that the stress in the front-to-back direction is reduced, and as a result, twisting in the front-to-back direction is also suppressed. Furthermore, compared with Figure 12B and others, the color of the diagonal ribs is uniformly lighter, indicating that a large amount of stress is transmitted evenly to the diagonal ribs, and the stress is distributed. Incidentally, in Figures 12C and 12D, the ribs are crushed due to deformation caused by stress, and as a result, the displacement of the support column becomes large.

[0058] From this, it was found that by adopting the truss structure of this embodiment, when a force is applied to the upper part of the support column 20 in the front-rear direction, the stress generated at the lower part of the support column 20 can be distributed to the entire base 200 and deformation of the ribs can also be suppressed, thereby reducing the amount of displacement at the upper part of the support column 20.

[0059] While honeycomb structures are generally considered to have high strength, it was found that the configuration of this embodiment is superior for structures that undergo twisting due to rotational moments, such as the base of a support column.

[0060] <4> summary As described above, according to this embodiment, in the structure of the leg body 100 of a frame (medical trolley 10 in this embodiment) having a leg body 100, a support column 20 extending upward from the leg body 100, and a mounting body 30 provided on the upper part of the support column 20 on which equipment can be installed, the leg body 100 has a base 200 having a support column mounting portion (bag body 210 in this embodiment) to which the lower end of the support column 20 is attached, and ribs 220 formed on the base 200 so as to surround the support column mounting portion, the ribs 220 have a truss structure, and of the truss structure, the truss structure adjacent to the support column mounting portion includes diagonal ribs 221 extending radially from the support column mounting portion.

[0061] This makes it possible to suppress twisting of the support column 20 even when the base 200 is formed using a lightweight material such as resin. As a result, it is possible to realize a lightweight leg structure for the frame and a medical trolley 10 that is less prone to shaking even when operating installed equipment such as the vital signs monitor 1.

[0062] Incidentally, if the base 200 is formed using a lightweight and high-strength material such as glass fiber, it is thought that the twisting of the base 200 can be reduced compared to when materials such as resin are used. However, using materials such as glass fiber has the disadvantage of increasing manufacturing costs. According to the configuration of this embodiment, even when low-cost materials such as resin are used, the twisting of the base 200 can be effectively suppressed, which has the advantage of suppressing the shaking of the installed object on top of the support column 20.

[0063] Furthermore, in this embodiment, the leg body 100 is H-shaped, and the mounting portion (bag body 210) for the support column 20 is provided in the central part of the rod-shaped base 200, resulting in a structure that is prone to twisting in the front-to-back direction due to the support column 20. If the leg body 100 were, for example, X-shaped, with branch portions 101 extending from near the support column mounting portion, then twisting of the base due to the support column 20 would hardly occur, and there would be no problem. In other words, the configuration of this embodiment is particularly effective for legs where there are no branch portions near the support column mounting portion of the base 200, and where twisting is likely to occur at the support column mounting portion of the base 200.

[0064] The embodiments described above are merely examples of how the present invention can be implemented, and the technical scope of the present invention should not be limited by them. In other words, the present invention can be implemented in various ways without departing from its gist or its main features.

[0065] In the above-described embodiment, a case was mentioned in which truss-structured ribs were formed over the entire area of ​​the base 200. However, this embodiment is not limited to this, and ribs other than truss-structured ribs may be formed in some areas. For example, only longitudinal and transverse ribs may be formed near both ends of the base 200 in the longitudinal direction, where twisting is less likely to occur. In this way, it is possible to reduce weight while maintaining torsional strength.

[0066] In the above-described embodiment, the case in which the mounting portion of the support column 20 is made of a bag-like body 210 was mentioned, but the mounting portion is not necessarily limited to a bag-like body; the point is that any configuration that allows the support column 20 to be erected on the base is acceptable. For example, the mounting portion of the support column 20 may be a through-tube. In this case, a truss structure rib as described in the embodiment can be connected to the wall surface of the tubular mounting portion.

[0067] The above-described embodiment described the case in which the leg structure of the support frame according to the present invention is applied to a medical trolley 10, but the present invention is not limited to this and can also be applied to the leg structure of support frames other than the medical trolley 10. It is particularly useful as a base structure in which the overall shape is prone to twisting due to the support column 20. The present invention is useful as a leg structure for a support frame in which it is undesirable to cause even the slightest vibration to the installed equipment. [Industrial applicability]

[0068] This invention is useful, for example, as a leg structure for a frame such as a medical trolley. [Explanation of Symbols]

[0069] 1. Biological Information Monitor 10 Medical Trolley 20 pillars 30 Installation body 100 legs 101 Branch 102 Casters 200 base 200a top 200b bottom side 201 Fitting hole 202 volts 210 Bag body 220 Rib 221, 222 Diagonal Rib 230a, 230b Truss structure 240 Washers

Claims

1. Legs and, A support column extending upward from the aforementioned leg body and An installation body provided on the upper part of the aforementioned support column, on which equipment can be installed, A leg structure of a frame having, The aforementioned leg body is A base having a support column mounting portion to which the lower end of the support column is attached, Ribs formed on the base so as to surround the support mounting portion, It has, The ribs have a truss structure, and of the truss structure, the truss structure adjacent to the support column mounting portion includes a first rib that extends radially from the support column mounting portion. Of the truss structures, the truss structures other than the truss structure adjacent to the support mounting portion include a second rib parallel to the first rib that extends radially from the support mounting portion. The first end of the first rib is connected to the support mounting portion, The second end of the first rib is connected to the second rib, The first rib and the second rib are formed in a straight line, The leg structure of the mounting frame.

2. The base further comprises a plurality of branches extending in a planar direction, The upper surface of the branch is lower than the lower surface of the base. A step is formed at the connection between the base and the branch portion. The base is positioned higher than the branch portion via the step. The leg structure of the mounting frame according to claim 1.

3. The truss size of the truss structure decreases as it approaches the support column attachment point. The leg structure of the mounting frame according to claim 1.

4. The aforementioned support post mounting section has a bag-like body into which the support post is inserted. The first ribs, which extend radially from the support mounting portion, are connected to the bag body. The leg structure of the mounting frame according to claim 1.

5. The aforementioned support post mounting section has a bag-like body into which the support post is inserted. The support column is attached to the bottom surface of the bag body by fastening with a screw via a washer. The washer is larger than the bottom surface of the bag. The leg structure of the mounting frame according to claim 1.

6. The support column is made of metal, and the base is made of resin. The leg structure of the mounting frame according to claim 1.

7. A medical trolley having the leg structure of a frame according to any one of claims 1 to 6.

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