CN218989916U

CN218989916U - Front temporary supporting device and bridge girder erection machine

Info

Publication number: CN218989916U
Application number: CN202223433477.8U
Authority: CN
Inventors: 李桐; 杨志明; 朱东明; 梁辉; 张延辉; 夏朝鹃; 郑奕; 赵梦春; 高峰; 陈逸; 白孔明; 徐宁龙; 汪理仁
Original assignee: China Railway Hi Tech Industry Corp Ltd; China Railway Jiujiang Bridge Engineering Co Ltd
Current assignee: China Railway Hi Tech Industry Corp Ltd; China Railway Jiujiang Bridge Engineering Co Ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-05-09
Anticipated expiration: 2032-12-21

Abstract

The utility model provides a front temporary supporting device and a bridge girder erection machine, and relates to the technical field of bridge erection. Through the rear side of main support, namely be provided with the recess towards one side of preceding landing leg, so, when the relative girder of preceding landing leg removes the via hole, the entablature of preceding landing leg can be held in the recess of preceding temporary support device, guarantees that preceding landing leg can move in place, promptly, guarantees that preceding landing leg also can support the front side position at the place ahead pier central line for the subsequent roof beam that waits to erect can be placed to the rear side position of place pier central line.

Description

Front temporary supporting device and bridge girder erection machine

Technical Field

The utility model relates to the technical field of bridge erection, in particular to a front temporary supporting device and a bridge girder erection machine.

Background

Because of the continuous development of highway and railway construction, the small-tonnage precast beams have no unified technical standard and specification, and the regions and terrains are different, so that the precast beam abutments are quite different, especially less than 220t and below, the abutment width is narrow, and when the bridge girder erection machine passes through a hole, the front temporary support is required to advance along with the bridge girder erection machine, and is supported at the front side position of the central line of the front abutment, and then the front supporting leg is also supported on the front abutment.

In order to ensure that space is available for placing the box girder at the rear side position of the center line of the front pier, the front supporting leg and the front temporary support are required to be supported at the front side position of the center line of the front pier, for the abutment with a narrow width, after the existing front temporary support is placed on the front pier in place, the upper cross beam of the front supporting leg at the rear is wider (the upper cross beam is required to be provided with a rocking roll assembly and some electric control devices which can walk along the girder of the bridge girder erection machine, so that the upper cross beam has wider width and meets the arrangement space and strength), and after the upper cross beam of the front supporting leg is abutted with the front temporary support, the bottom of the front supporting leg can be partially positioned at the rear side of the center line of the front pier.

Disclosure of Invention

The utility model aims to solve the problem that the existing front temporary support can influence the positioning and supporting of the front support leg.

In order to solve the problems, the utility model provides a front temporary supporting device which comprises a main support and a telescopic supporting leg, wherein the top end of the main support is fixedly connected with a main beam at the end part of a main beam of a bridge girder erection machine, a groove is formed in one side, facing the front supporting leg, of the bottom end of the main support, the groove is used for accommodating an upper beam of the front supporting leg, and the end part of the telescopic supporting leg is connected with the bottom end of the main support.

Compared with the prior art, the front temporary supporting device provided by the utility model has the following beneficial effects:

when the bridge girder erection machine is erected and a box girder needs to be through holes, the telescopic support legs which are supported temporarily in the front can be contracted to enable the bottom end of the front temporary supporting device to be suspended, then the girder of the bridge girder erection machine is advanced to drive the suspended front temporary supporting device at the front end of the girder to advance synchronously until the front temporary supporting device reaches the front side position of the center line of the front pier and then stops, the telescopic support legs can extend out, and then the front temporary supporting device is supported on the front side of the center line of the front pier.

Further, the front temporary supporting device further comprises a first transverse connection and a second transverse connection, the main supports and the telescopic supporting legs are respectively provided with two main supports which are symmetrically arranged and two main supports are respectively fixedly connected with the main cross beam, the two main supports are respectively fixedly connected with the first transverse connection, the two telescopic supporting legs are respectively connected with the corresponding bottom ends of the main supports, and the two telescopic supporting legs are respectively fixedly connected with the second transverse connection.

Further, the front temporary supporting device further comprises two inclined supports which are arranged in one-to-one correspondence with the main supports, one end of each inclined support is used for being connected with the corresponding main support, and the other end of each inclined support is used for being connected with the corresponding end of the main cross beam.

Further, the front temporary supporting device further comprises a jacking cylinder, the telescopic supporting leg comprises an upper supporting leg and a lower supporting leg, the top of the upper supporting leg is used for being fixedly connected with the bottom end of the main supporting leg, the lower supporting leg is slidably connected with the upper supporting leg, a piston rod of the jacking cylinder is arranged downwards, a cylinder barrel of the jacking cylinder is used for being fixedly connected with the upper supporting leg, and a piston rod of the jacking cylinder is used for being fixedly connected with the lower supporting leg.

Further, a plurality of first connecting holes are formed in the lower supporting leg, a second connecting hole is formed in at least the bottom of the upper supporting leg, and the second connecting hole of the upper supporting leg is used for being connected with the first connecting hole of the lower supporting leg through a fastener.

Further, the front temporary supporting device further comprises an adjusting screw assembly, the adjusting screw assembly comprises a connecting pipe, a nut and a screw, the top end of the connecting pipe is used for being connected with the lower supporting leg, the nut is connected with the bottom end of the connecting pipe, and the screw is in threaded connection with the nut.

Further, adjusting screw subassembly still includes base, bolt and gasket, first shrinkage pool has been seted up to the bottom of base, the second shrinkage pool has been seted up at the top of base, first shrinkage pool with second shrinkage pool intercommunication, the top of base is provided with protruding cambered surface, the bottom of screw rod be provided with protruding cambered surface matched indent cambered surface, the inner end of indent cambered surface is provided with the bolt hole, the gasket middle part is provided with the gasket hole, the gasket be used for the butt in the hole bottom of first shrinkage pool, the bolt be used for inserting in proper order first shrinkage pool the gasket hole the second shrinkage pool with the bolt hole, until the bolt head butt of bolt in the gasket, the gasket orientation one side of the bolt head of bolt is provided with the concave surface, the bolt head orientation of bolt one side of gasket is provided with the convex surface, wherein, the internal diameter of first shrinkage pool is greater than the internal diameter of second shrinkage pool, the internal diameter of second shrinkage pool is greater than the diameter of bolt.

Further, the front temporary support device further comprises a cushion block assembly, wherein the cushion block assembly is arranged between the adjusting screw assembly and the lower landing leg.

Further, the front temporary supporting device further comprises a ladder structure, the ladder structure comprises a first platform, a second platform and a cat ladder, the first platform is arranged on the main support and is used for being connected with a side platform 71 of the main beam, the second platform is arranged at the bottom end of the lower supporting leg, the cat ladder is arranged on the main support or/and the upper supporting leg, and the cat ladder is used for being connected with the first platform and the second platform.

The utility model also provides a bridge girder erection machine, which comprises the front temporary supporting device.

Because the technical improvements and beneficial effects of the bridge girder erection machine are at least the same as those of the front temporary supporting device, the bridge girder erection machine will not be described.

Drawings

FIG. 1 is a front view of a front temporary support device according to an embodiment of the present utility model;

FIG. 2 is a side view of a front temporary support device according to an embodiment of the utility model;

fig. 3 is a schematic view of the structure of an adjusting screw assembly according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a main support; 11. a groove; 2. a telescopic support leg; 21. an upper leg; 22. a lower leg; 3. a main beam; 41. a first cross-section; 42. a second cross-section; 43. a diagonal support; 44. a jacking cylinder; 5. an adjusting screw assembly; 51. a connecting pipe; 52. a nut; 53. a screw; 531. a concave cambered surface; 54. a flange; 55. a base; 551. a first concave hole; 552. a second concave hole; 553. a convex cambered surface; 56. a bolt; 57. a gasket; 58. a push rod; 6. a pad assembly; 71. a side platform; 72. a first platform; 73. a second platform; 74. a ladder stand; 8. and (5) abutment.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Moreover, in the drawings, the X-axis represents the longitudinal direction, i.e., the front-to-back position, and the positive direction of the X-axis (i.e., the arrow of the X-axis is directed) represents the front, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) represents the rear; the Y-axis in the drawing represents the lateral direction, i.e., the left-right position, and the positive direction of the Y-axis (i.e., the arrow of the Y-axis points) represents the left, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) represents the right; the Z-axis in the drawing represents vertical, i.e., up-down position, and the positive direction of the Z-axis (i.e., the arrow pointing in the Z-axis) represents up and down, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis).

It should also be noted that the foregoing X-axis, Y-axis, and Z-axis are meant to be illustrative only and not indicative or implying that the apparatus or component in question must be oriented or configured in a particular orientation and operation and therefore should not be construed as limiting the present utility model.

Referring to fig. 1 and 2, the front temporary supporting device of the embodiment of the utility model comprises a main support 1 and a telescopic supporting leg 2, wherein the top end of the main support 1 is fixedly connected with a main beam 3 at the end part of a main beam of a bridge girder erection machine, a groove 11 is arranged at one side of the bottom end of the main support 1, which faces to the front supporting leg, the groove 11 is used for accommodating an upper beam of the front supporting leg, and the end part of the telescopic supporting leg 2 is connected with the bottom end of the main support 1.

In this embodiment, when the bridge girder erection machine is erected and a box girder needs to be passed through a hole, the telescopic support leg 2 which is supported temporarily before can be contracted, so that the bottom end of the front temporary support device is suspended, then the girder of the bridge girder erection machine advances, and the suspended front temporary support device at the front end of the girder is driven to advance synchronously until the front temporary support device reaches the front side position of the center line of the front abutment 8 and then stops, and then the telescopic support leg 2 can be stretched out, so that the front temporary support device is supported at the front side of the center line of the front abutment 8.

In the front temporary supporting device, the main support 1 provides a carrier for installing the telescopic supporting leg 2, the main support 1 does not have a telescopic function, but the telescopic supporting leg 2 has a telescopic function, and the telescopic capacity of the telescopic supporting leg can meet the related requirements during bridging, for example, when the telescopic supporting leg supports the rear supporting leg, the main beam of the bridge girder erection machine can be in a horizontal state (the main beam is parallel to the horizontal plane), for example, after the telescopic supporting leg contracts, the main beam can be separated from the abutment 8. Wherein the main beam 3 is a structure belonging to the main beam of the bridge girder erection machine.

Referring to fig. 1, optionally, the front temporary supporting device further includes a first cross-link 41 and a second cross-link 42, where the main support 1 and the telescopic support legs 2 are respectively provided with two main supports 1 and two main supports 1 are symmetrically arranged, the top ends of the two main supports 1 are respectively fixedly connected with the main beam 3 (such as a bolt 56), the two main supports 1 are respectively fixedly connected with the first cross-link 41, the two telescopic support legs 2 are respectively connected with the bottom ends of the corresponding main supports 1, and the two telescopic support legs 2 are respectively fixedly connected with the second cross-link 42.

In this embodiment, the main support 1 and the telescopic support leg 2 of the front temporary support device are respectively provided with two, one main support 1 is used for being connected to the left part of the main beam 3, the other main support 1 is used for being connected to the right part of the main beam 3, and the bottom of each main support 1 is respectively connected with one telescopic support leg 2, so that the front temporary support is more stable to the support of the front end of the girder of the bridge girder erection machine. Wherein, two main support 1 can be connected through first cross-over connection 41, just is a whole before guaranteeing that two main support 1 are connected with main beam 3, and two flexible landing legs 2 are connected through second cross-over connection 42, can further guarantee the structural stability of two flexible landing legs 2, and preceding temporary support device can be installed in advance in subaerial completion, improves the installation effectiveness of whole bridge crane.

Wherein, after two flexible landing legs 2 are connected through second cross-section 42, second cross-section 42 does not influence the flexible function of two flexible landing legs 2.

Referring to fig. 1, optionally, the front temporary supporting device further includes two diagonal braces 43 corresponding to the main braces 1 one by one, one end of each diagonal brace 43 is used for being connected with the corresponding main brace 1, and the other end of each diagonal brace 43 is used for being connected with the corresponding one end of the main cross beam 3.

In this embodiment, one end of the diagonal brace 43 is hinged to the main support 1, and after the diagonal brace 43 rotates, the other end of the diagonal brace 43 can be connected to the main beam 3, so that the supporting capability of the main beam of the bridge girder erection machine is further enhanced through the diagonal brace 43.

Referring to fig. 1, optionally, the front temporary supporting device further includes a lifting cylinder 44, the telescopic supporting leg 2 includes an upper supporting leg 21 and a lower supporting leg 22, the top of the upper supporting leg 21 is fixedly connected with the bottom end of the main supporting leg 1, the lower supporting leg 22 is slidably connected in the upper supporting leg 21, a piston rod of the lifting cylinder 44 is disposed downward, a cylinder barrel of the lifting cylinder 44 is fixedly connected with the upper supporting leg 21, and a piston rod of the lifting cylinder 44 is fixedly connected with the lower supporting leg 22.

In this embodiment, the extension or shortening of the telescopic leg 2 is driven by a jack-up cylinder 44, which jack-up cylinder 44 may be a hydraulic cylinder. Specifically, the piston rod of the jacking cylinder 44 is downward, that is, the cylinder barrel of the jacking cylinder 44 is fixedly connected with the upper supporting leg 21, or the cylinder barrel of the jacking cylinder 44 is fixedly connected with the second transverse link 42, the piston rod of the jacking cylinder 44 is fixedly connected with the lower supporting leg 22, when the piston rod of the jacking cylinder 44 stretches out, the telescopic supporting leg 2 is driven to stretch, the supporting effect of the front temporary supporting device can be achieved, and when the piston rod of the jacking cylinder 44 contracts, the telescopic supporting leg 2 can be driven to contract, and the suspension of the front temporary supporting device can be achieved.

Optionally, a plurality of first connection holes are provided on the lower leg 22, a second connection hole is provided at least at the bottom of the upper leg 21, and the second connection hole of the upper leg 21 is used for connecting with the first connection hole of the lower leg 22 through a fastener.

In this embodiment, after the jack-up jar 44 drives the flexible landing leg 2 to stretch out and draw back, can connect gradually second connecting hole and first connecting hole by the fastener, realize lower landing leg 22 and the relative fixation of last landing leg 21, the flexible landing leg 2 length changes when avoiding the fluid to reveal in the jack-up jar 44, also avoids jack-up jar 44 to receive the load always. Wherein the fastener may be a pin.

Referring to fig. 1 and 3, optionally, the front temporary support device further includes an adjusting screw assembly 5, the adjusting screw assembly 5 includes a connection pipe 51, a nut 52, and a screw 53, a top end of the connection pipe 51 is used to connect with the lower leg 22, the nut 52 is connected with a bottom end of the connection pipe 51, and the screw 53 is screwed into the nut 52.

In this embodiment, since the plurality of first connection holes on the lower leg 22 cannot be provided without a space, the jack cylinder 44 drives the telescopic leg 2 to vary in length, and after being fixed by a fastener, the height can be finely adjusted by the adjusting screw assembly 5, specifically, by screwing the screw 53 to adjust its relative position with the nut 52.

Referring to fig. 3, optionally, the adjusting screw assembly 5 further includes a base 55, a bolt 56 and a gasket 57, a first concave hole 551 has been seted up to the bottom of base 55, second concave hole 552 has been seted up at the top of base 55, first concave hole 551 with second concave hole 552 communicates, the top of base 55 is provided with protruding cambered surface 553, the bottom of screw 53 be provided with protruding cambered surface 553 matched indent cambered surface 531, the inner end of indent cambered surface 531 is provided with the bolt hole, gasket 57 middle part is provided with the gasket hole, gasket 57 be used for the butt in the hole bottom of first concave hole 551, the bolt 56 is used for inserting in proper order first concave hole 551 gasket hole second concave hole 552 with the bolt hole, until the bolt head butt of bolt 56 in gasket 57, the gasket 57 is towards one side of the bolt head of bolt 56 is provided with the concave surface, the bolt head orientation of bolt 57 is provided with the convex surface, wherein, first 551 be greater than the second concave hole 552 the inside diameter of bolt 56 is greater than the second concave hole 552.

In this embodiment, the base 55 is used for supporting on the abutment 8, the concave cambered surface 531 at the bottom of the screw 53 is matched with the convex cambered surface 553 at the top of the base 55, so if the front end of the girder of the bridge girder erection machine changes in downward deflection due to dead weight, the screw 53 can drive the bolt 56 to rotate together relative to the base 55 so as to adapt to the deflection change of the girder of the bridge girder erection machine, wherein the top surface of the bolt head of the bolt 56 and the bottom surface of the gasket 57 are also matched convex surfaces and concave surfaces, which can not obstruct the angle change of the bolt 56, and it can be understood that the larger the inner diameter of the second concave hole 552 is, the larger the angle changeable range of the bolt 56 is. Wherein the screw 53 may also undergo a corresponding angular change if abutment 8 has a slope.

The screw 53 is also fixedly connected with a push rod 58, and the push rod 58 is convenient for realizing the rotation of the screw 53 to finely adjust the height. The top of the connection tube 51 may be connected to the lower leg 22 by a flange 54.

Referring to fig. 1 and 2, optionally, the front temporary support device further comprises a pad assembly 6, the pad assembly 6 being configured to be disposed between the adjusting screw assembly 5 and the lower leg 22. The pad assembly 6 comprises at least one pad.

In this embodiment, when the bridge girder erection machine passes through the hole, since the front temporary supporting device is required to pass over the box girder erected before along with the front end of the girder of the bridge girder erection machine, for box girders with different gradients, a proper number of cushion blocks can be selected to be arranged between the adjusting screw assembly 5 and the lower supporting leg 22 so as to ensure the passing through hole of the bridge girder erection machine.

Referring to fig. 1 and 2, optionally, the front temporary support device further comprises a ladder structure, the ladder structure comprises a first platform 72, a second platform 73 and a cat ladder 74, the first platform 72 is arranged on the main support 1 and is used for being connected with a side platform 71 of the main beam, the second platform 73 is arranged at the bottom end of the lower support leg 22, the cat ladder 74 is arranged on the main support 1 or/and the upper support leg 21, and the cat ladder 74 is used for being connected with the first platform 72 and the second platform 73.

In this embodiment, since the lower leg 22 and the upper leg 21 need to be fixed by fasteners, and the adjustment screw assembly 5 may also need to be used for fine adjustment of the overall height of the front temporary support device, a worker may need to pass through the hole to the front abutment 8, specifically, the worker may walk through the hole from the side platform 71 on the girder of the bridge girder erection machine, then move from the side platform 71 to the first platform 72, then complete the installation of the diagonal brace 43 on the first platform 72, move from the first platform 72 to the second platform 73 via the ladder 74, and only further perform the connection fasteners on the second platform 73 to fix the lower leg 22 and the upper leg 21 relatively, and then jump from the second platform 73 to the abutment 8, and operate the adjustment screw assembly 5.

The utility model further provides a bridge girder erection machine, which comprises the front temporary supporting device.

It should be noted that, in the present utility model, the terms "fixedly connected" and "connected" are to be construed broadly, unless explicitly specified and defined otherwise, and may be, for example, welded, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" and "a second" may explicitly or implicitly include at least one such feature.

Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.

Claims

1. The utility model provides a preceding temporary support device, its characterized in that includes main support (1) and flexible landing leg (2), the top of main support (1) is used for with main beam (3) fixed connection of the tip of the main beam of bridge crane, the bottom of main support (1) is provided with recess (11) towards one side of preceding landing leg, recess (11) are used for holding the entablature of preceding landing leg, the tip of flexible landing leg (2) with the bottom of main support (1) is connected.

2. The front temporary supporting device according to claim 1, further comprising a first cross-link (41) and a second cross-link (42), wherein the main support (1) and the telescopic support legs (2) are respectively provided with two and one-to-one corresponding arrangements, the two main supports (1) are symmetrically arranged, the top ends of the two main supports (1) are respectively fixedly connected with the main cross beam (3), the two main supports (1) are respectively fixedly connected with the bottom ends of the corresponding main supports (1), and the two telescopic support legs (2) are respectively fixedly connected with the bottom ends of the corresponding main supports (1) through the second cross-links (42).

3. Front temporary support device according to claim 2, further comprising two diagonal braces (43) in one-to-one correspondence with the main braces (1), one end of the diagonal brace (43) being intended to be connected with the corresponding main brace (1), the other end of the diagonal brace (43) being intended to be connected with the corresponding end of the main cross beam (3).

4. A front temporary support device according to any one of claims 1-3, further comprising a jacking cylinder (44), wherein the telescopic support leg (2) comprises an upper support leg (21) and a lower support leg (22), the top of the upper support leg (21) is fixedly connected with the bottom end of the main support leg (1), the lower support leg (22) is slidably connected with the upper support leg (21), a piston rod of the jacking cylinder (44) is arranged downwards, a cylinder barrel of the jacking cylinder (44) is fixedly connected with the upper support leg (21), and a piston rod of the jacking cylinder (44) is fixedly connected with the lower support leg (22).

5. Front temporary support device according to claim 4, characterized in that the lower leg (22) is provided with a plurality of first connection holes, the upper leg (21) is provided with at least a bottom with a second connection hole, the second connection hole of the upper leg (21) being intended to be connected with the first connection hole of the lower leg (22) by means of a fastener.

6. The front temporary support device according to claim 5, further comprising an adjusting screw assembly (5), the adjusting screw assembly (5) comprising a connecting pipe (51), a nut (52) and a screw (53), the top end of the connecting pipe (51) being for connection with the lower leg (22), the nut (52) being connected with the bottom end of the connecting pipe (51), the screw (53) being screwed into the nut (52).

7. The front temporary supporting device according to claim 6, wherein the adjusting screw assembly (5) further comprises a base (55), a bolt (56) and a gasket (57), a first concave hole (551) is formed in the bottom of the base (55), a second concave hole (552) is formed in the top of the base (55), the first concave hole (551) is communicated with the second concave hole (552), a convex cambered surface (553) is formed in the top of the base (55), a concave cambered surface (531) matched with the convex cambered surface (553) is formed in the bottom of the screw (53), a bolt hole is formed in the inner end of the concave cambered surface (531), a gasket hole is formed in the middle of the gasket (57), the gasket (57) is used for being abutted to the bottom of the first concave hole (551), the bolt (56) is used for being sequentially inserted into the first concave hole (551), the second concave hole (552) is communicated with the bolt hole until the bolt head (56) of the bolt head (57) is abutted to the first concave hole (57), the first concave hole (57) is formed in the middle of the gasket (57), the first concave hole (57) is provided with a first concave hole (551), the second recess (552) has an inner diameter greater than the diameter of the bolt (56).

8. The front temporary support device according to claim 6, further comprising a spacer assembly (6), the spacer assembly (6) being adapted to be disposed between the adjusting screw assembly (5) and the lower leg (22).

9. The front temporary support device according to claim 5, further comprising a ladder structure comprising a first platform (72), a second platform (73) and a ladder stand (74), wherein the first platform (72) is arranged on the main support (1) and is used for being connected with a side platform (71) of a main beam, the second platform (73) is arranged at the bottom end of the lower support leg (22), the ladder stand (74) is arranged at the main support (1) or/and the upper support leg (21), and the ladder stand (74) is used for being connected with the first platform (72) and the second platform (73).

10. A bridge girder erection machine comprising the front temporary support device according to any one of claims 1 to 9.