CN218465339U

CN218465339U - Hoisting equipment slides with spacing auxiliary device that rail was laid

Info

Publication number: CN218465339U
Application number: CN202222882023.2U
Authority: CN
Inventors: 陈合锋; 刘阳
Original assignee: Tianjin Hengfeng Hoisting Engineering Co ltd
Current assignee: Tianjin Hengfeng Hoisting Engineering Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-10
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a hoisting equipment slides with spacing auxiliary device that rail was laid, including rail body and auxiliary stand, rail body is laid subaerial, the auxiliary stand erects the outside of rail body, still including the roll adjustment mechanism that is used for adjusting the stop gear interval, be used for adjusting the angle modulation mechanism of stop gear angle and be used for right the rail body carries out spacing stop gear, and roll adjustment mechanism is located auxiliary stand's lower part both sides, angle modulation mechanism are located roll adjustment mechanism and keep away from auxiliary stand's one end, stop gear correspond angle modulation mechanism and are located roll adjustment mechanism and keep away from auxiliary stand's one end just is located rail body's both sides, the beneficial effects of the utility model are that be equipped with roll adjustment mechanism and angle modulation mechanism, can adjust stop gear's interval and angle according to rail body's structure and actual conditions to carry on spacingly to polytype rail body at the rail laying process, prevent that the rail from appearing the skew.

Description

Hoisting equipment slides with spacing auxiliary device that rail was laid

Technical Field

The utility model belongs to the technical field of the rail laying device technique and specifically relates to a lifting device slides with spacing auxiliary device that rail laid.

Background

In the prior art, in the engineering construction field of a thermal power plant, due to the limitation of construction site conditions or from the consideration of economy, large-scale equipment such as a transformer and the like is usually installed in a matching manner by adopting a hoisting process of equipment slippage. Adopt such operation mode, the construction period that equipment system of sliding arranged is long, it is big that the proportion is occupied to length of laying and the adjustment of rail, especially, when the rail runs through the equipment below, can't use the truck crane cooperation, need carry out rail laying and accurate adjustment through the manpower, waste time and energy, and at the in-process of laying the rail, the rail appears the skew phenomenon easily and leads to the error precision of hoist and mount with the rail great, stability reduces, simultaneously because the kind and the structure of rail are comparatively diversified, the in-process is laid to the rail, stop device among the prior art can't assist spacingly to the rail of different grade type and structure, the commonality of device is relatively poor.

The application numbers are: 202121642830.6's chinese utility model patent discloses a general type auxiliary device that equipment slided and laid with rail, including the horizontal pole, horizontal pole top intermediate position is equipped with the handle, and horizontal pole bottom both ends symmetry is equipped with two and supports the montant, and every supports the montant intermediate position and is equipped with regulation spacing part below the horizontal pole, adjusts spacing part including setting up the sleeve pipe parallel with the horizontal pole on supporting the montant, threaded connection is at the intraductal screw rod of sleeve, the one end of screw rod is worn out the sleeve pipe and is just worn out the end and be equipped with and support sliding bearing. However, the general auxiliary device for laying the steel rail for sliding of the equipment cannot adjust the spacing and the angle of the limiting mechanism according to the structure and the actual condition of the steel rail body, the steel rail with single specification can only be transversely limited, the use condition is single, the steel rail body with different specifications cannot be accurately limited, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a spacing auxiliary device that hoisting equipment sliding was laid with rail.

In order to achieve the above object, the present invention provides a technical solution:

the utility model provides a spacing auxiliary device that lifting device slided with rail and laid, includes rail body and auxiliary stand, rail body lays subaerial, the auxiliary stand erects the outside of rail body, still including the roll adjustment mechanism that is used for adjusting the stop gear interval, be used for adjusting the angle modulation mechanism of stop gear angle and be used for right the rail body carries out spacing stop gear, roll adjustment mechanism is located the lower part both sides of auxiliary stand, angle modulation mechanism is located roll adjustment mechanism and keeps away from the one end of auxiliary stand, stop gear corresponds angle modulation mechanism and is located roll adjustment mechanism and keeps away from the one end of auxiliary stand and is located the both sides of rail body.

The roll adjustment mechanism includes roll adjustment screw rod and roll adjustment support, the roll adjustment screw rod is equipped with two sets ofly, and is two sets of the roll adjustment screw rod symmetry sets up the lower part both sides of auxiliary stand and run through the auxiliary stand with auxiliary stand threaded connection, it is two sets of the roll adjustment screw rod sets up relatively, the roll adjustment support corresponds two sets ofly the roll adjustment screw rod is equipped with two sets ofly, and is two sets of the roll adjustment support sets up respectively two sets ofly the relative one end that sets up of roll adjustment screw rod and with correspond the roll adjustment screw rod rotates and connects.

The angle adjusting mechanism comprises angle adjusting steering engines and angle adjusting shafts, the angle adjusting steering engines correspond to two groups of distance adjusting supports and are provided with two groups, the two groups of angle adjusting steering engines are respectively arranged on one sides of the two groups of distance adjusting supports and are fixedly connected with the corresponding distance adjusting supports, the output ends of the angle adjusting steering engines penetrate through the corresponding distance adjusting supports, the two groups of angle adjusting shafts correspond to the two groups of angle adjusting steering engines and are provided with two groups, the two groups of angle adjusting shafts are respectively arranged in the middle of the two groups of distance adjusting supports and are rotatably connected with the corresponding distance adjusting supports, and the output ends of the two groups of angle adjusting steering engines are respectively fixedly connected with one ends of the two groups of angle adjusting shafts.

Limiting mechanism includes spacing installation piece and limiting plate, spacing installation piece corresponds two sets ofly the pitch axis is equipped with two sets ofly, and is two sets ofly spacing installation piece sets up respectively two sets ofly the middle part of pitch axis and with correspond pitch axis fixed connection, the one end of spacing installation piece is located the inboard of pitch support and its other end salient in the pitch support, the limiting plate corresponds two sets ofly spacing installation piece is equipped with two sets ofly, and is two sets ofly the limiting plate sets up respectively two sets ofly spacing installation piece salient in the one end of pitch support and with correspond spacing installation piece fixed connection, it is two sets ofly the limiting plate is located respectively the both sides of rail body and with the rail body laminating sets up.

The steel rail body is fixedly connected with the limiting plate, the limiting plate is fixedly connected with the steel rail body, and the limiting plate is fixedly connected with the steel rail body.

Still include the scale, the scale setting is in the inboard upper portion of auxiliary stand and with auxiliary stand fixed connection, the scale corresponds roll adjustment mechanism level setting.

Still include protection machanism, protection machanism includes protection piece and abrasionproof pad, the protection piece corresponds the scale setting is in the inboard upper portion of auxiliary stand and with auxiliary stand fixed connection, the abrasionproof pad sets up the bottom of protection piece and with protection piece fixed connection, the abrasionproof pad is located the below of scale and being located the top of rail body.

Still include the moving mechanism, the moving mechanism includes the removal base and removes the universal wheel, the removal base sets up the bottom of auxiliary stand and with auxiliary stand fixed connection, it sets up to remove the universal wheel the bottom of removal base and with removal base fixed connection, the auxiliary stand passes through the removal base and it establishes to remove the universal wheel carrier the outside of rail body.

The angle adjusting steering engine is characterized by further comprising an electric control unit, wherein the electric control unit is arranged on one side of the upper portion of the auxiliary support and is fixedly connected with the auxiliary support, and the electric control unit is electrically connected with the angle adjusting steering engine.

Still including connecting the hangers, it is equipped with two sets ofly to connect the hangers, and is two sets of it sets up respectively to connect the hangers the upper portion both sides of auxiliary stand and with auxiliary stand fixed connection.

The utility model has the advantages that:

be equipped with roll adjustment mechanism and angle modulation mechanism, can adjust stop gear's interval and angle according to the structure and the actual conditions of rail body, thereby it is spacing to multiple type rail body in the rail laying process, prevent that the skew from appearing in the rail, it is nimble to use, and be equipped with the reading structure, can carry out the accuracy to the rail body of different specifications spacing, simultaneously can be with spacing auxiliary device assembly in order to regard as the adjustable limit structure of detachable on the rail laying device, operating mode is various, therefore, the clothes hanger is strong in practicability.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the adjustment mechanism, the angle adjustment mechanism and the position limiting mechanism;

FIG. 3 is an electrical connection diagram of the present invention;

fig. 4 is a working state diagram of the steel rail body of the utility model with a triangular cross section.

In the figure: 1. a rail body; 2. an auxiliary support; 3. adjusting the pitch of the screw rod; 4. a distance adjusting bracket; 5. an angle adjusting steering engine; 6. an angle adjusting shaft; 7. a limiting mounting block; 8. a limiting plate; 9. a limiting protective pad; 10. a graduated scale; 11. a protection block; 12. an anti-wear pad; 13. a movable base; 14. moving the universal wheel; 15. an electronic control unit; 16. and connecting the hangers.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings,

the utility model provides a hoisting equipment slides with spacing auxiliary device that rail was laid, including rail body 1 and auxiliary stand 2, rail body 1 is laid subaerial, auxiliary stand 2 erects in the outside of rail body 1, still including the roll adjustment mechanism that is used for adjusting the stop gear interval, be used for adjusting the angle modulation mechanism of stop gear angle and be used for carrying out spacing stop gear to rail body 1, roll adjustment mechanism is located auxiliary stand 2's lower part both sides, the one end that auxiliary stand 2 was kept away from to the angle modulation mechanism that angle modulation mechanism is located, stop gear corresponds that angle modulation mechanism is located roll adjustment mechanism and keeps away from auxiliary stand 2's one end and is located rail body 1's both sides, the utility model discloses the overall structure schematic diagram is shown in fig. 1.

The roll adjustment mechanism includes roll adjustment screw 3 and roll adjustment support 4, roll adjustment screw 3 is equipped with two sets ofly, two sets of 3 symmetries of roll adjustment screw set up in the lower part both sides of auxiliary stand 2 and run through auxiliary stand 2 and auxiliary stand 2 threaded connection, two sets of 3 relative settings of roll adjustment screw, roll adjustment support 4 corresponds two sets of roll adjustment screw 3 and is equipped with two sets ofly, two sets of roll adjustment support 4 set up respectively in the relative one end that sets up of two sets of roll adjustment screw 3 and rotate with corresponding roll adjustment screw 3 and be connected, roll adjustment mechanism passes through roll adjustment screw 3 and the cooperation of roll adjustment support 4, for roll adjustment mechanism and stop gear provide the erection bracing and adjust stop gear's interval according to rail body 1's specification, wherein, roll adjustment screw 3 is used for providing the erection bracing for roll adjustment support 4, roll adjustment support 4 is used for angle adjustment mechanism and stop gear provide the erection bracing and adjust stop gear's interval according to rail body 1's specification under the effect of roll adjustment screw 3, when the interval of stop gear needs to adjust the pitch adjustment screw, rotate the adjustment screw, thereby adjust the interval between two sets of roll adjustment support 4, can carry out the spacing mechanism, the spacing adjustment mechanism, the utility model is shown in the schematic diagram and is shown in the utility model.

The angle adjusting mechanism comprises angle adjusting steering engines 5 and angle adjusting shafts 6, the angle adjusting steering engines 5 are provided with two groups corresponding to two groups of distance adjusting supports 4, the two groups of angle adjusting steering engines 5 are respectively arranged on one sides of the two groups of distance adjusting supports 4 and fixedly connected with the corresponding distance adjusting supports 4, the output ends of the angle adjusting steering engines 5 penetrate through the corresponding distance adjusting supports 4, the angle adjusting shafts 6 are provided with two groups corresponding to the two groups of angle adjusting steering engines 5, the two groups of angle adjusting shafts 6 are respectively arranged in the middle of the two groups of distance adjusting supports 4 and rotatably connected with the corresponding distance adjusting supports 4, the output ends of the two groups of steering engines 5 are respectively fixedly connected with one ends of the two groups of angle adjusting shafts 6, the angle adjusting mechanism is matched with the angle adjusting steering engines 5 and the angle adjusting shafts 6 to adjust the angle of the limiting mechanism, so as to limit steel rail bodies 1 with different structures, wherein the angle adjusting steering engines 5 are used for providing installation support for the angle adjusting mechanism and adjusting the angle of the limiting mechanism under the effect of the angle adjusting steering engines 5, so as to limit the steel rail bodies 1 with different structures.

The limiting mechanism comprises limiting installation blocks 7 and limiting plates 8, two groups of limiting installation blocks 7 are arranged corresponding to two groups of angle adjusting shafts 6, the two groups of limiting installation blocks 7 are respectively arranged in the middle of the two groups of angle adjusting shafts 6 and fixedly connected with the corresponding angle adjusting shafts 6, one ends of the limiting installation blocks 7 are located on the inner sides of the angle adjusting supports 4, the other ends of the limiting installation blocks 7 protrude out of the angle adjusting supports 4, the limiting plates 8 are arranged corresponding to the two groups of limiting installation blocks 7, two groups of limiting plates 8 are respectively arranged at one ends, protruding out of the angle adjusting supports 4, of the two groups of limiting installation blocks 7 and fixedly connected with the corresponding limiting installation blocks 7, the two groups of limiting plates 8 are respectively located on two sides of the steel rail body 1 and are attached to the steel rail body 1, the limiting mechanism is matched with the limiting installation blocks 7 and the limiting plates 8, the steel rail bodies 1 of different specifications are limited under the effects of the angle adjusting mechanism and the angle adjusting mechanism, the limiting installation blocks 7 are used for providing installation support for the limiting plates 8 and connecting the limiting plates 8 with the angle adjusting shafts 6, and the steel rail bodies 1 of different specifications are transversely moved under the effect of the angle adjusting mechanism, and accordingly the steel rail body 1 of different specifications can be limited.

Still include spacing protection pad 9, spacing protection pad 9 sets up in the limiting plate 8 near one side of rail body 1 and with limiting plate 8 fixed connection, limiting plate 8 sets up through the laminating of spacing protection pad 9 and rail body 1, and wherein, spacing protection pad 9 is used for protecting rail body 1 and limiting plate 8, prevents that collision and friction damage from appearing in spacing in-process rail body 1 and limiting plate 8.

Still include scale 10, scale 10 sets up on the inboard upper portion of auxiliary stand 2 and with auxiliary stand 2 fixed connection, and scale 10 corresponds roll adjustment mechanism level and sets up, and wherein, scale 10 is arranged in as the reading structure in the device, and accessible scale 10 carries out the accuracy control to stop gear.

Still include protection machanism, protection machanism includes protection piece 11 and abrasionproof pad 12, protection piece 11 correspond scale 10 set up in the inboard upper portion of auxiliary stand 2 and with auxiliary stand 2 fixed connection, abrasionproof pad 12 set up in the bottom of protection piece 11 and with protection piece 11 fixed connection, abrasionproof pad 12 is located the below of scale 10 and is located the top of rail body 1, protection machanism is used for protecting scale 10, prevent to appear the collision friction damage between spacing in-process rail body 1 and the scale 10, protection piece 11 is used for providing the erection bracing for abrasionproof pad 12, abrasionproof pad 12 is used for separating scale 10 and rail body 1, thereby prevent to appear the collision friction damage between spacing in-process rail body 1 and the scale 10.

The steel rail support further comprises a moving mechanism, the moving mechanism comprises a moving base 13 and a moving universal wheel 14, the moving base 13 is arranged at the bottom of the auxiliary support 2 and is fixedly connected with the auxiliary support 2, the moving universal wheel 14 is arranged at the bottom of the moving base 13 and is fixedly connected with the moving base 13, the auxiliary support 2 is erected outside the steel rail body 1 through the moving base 13 and the moving universal wheel 14, the moving mechanism is matched with the moving base 13 and the moving universal wheel 14 and provides moving support for the auxiliary support 2, a braking plate is arranged on the moving universal wheel 14, the moving base 13 is used for providing mounting support for the moving universal wheel 14 and installing the moving universal wheel 14 at the bottom of the auxiliary support 2, and the moving universal wheel 14 is used for providing moving support for the auxiliary support 2 through the moving base 13.

Still include electrical unit 15, electrical unit 15 sets up in upper portion one side of auxiliary stand 2 and with auxiliary stand 2 fixed connection,

electrical unit

15 and 5 electric connection of angle modulation steering wheel, wherein, accessible electrical unit 15 control angle modulation steering wheel 5 work is in order to drive stop gear and rotate certain angle, the utility model discloses the electric connection picture is shown in fig. 3.

Still including connecting hangers 16, connect hangers 16 and be equipped with two sets ofly, two sets ofly connect hangers 16 set up respectively in auxiliary stand 2's upper portion both sides and with auxiliary stand 2 fixed connection, wherein, connect hangers 16 and be used for as the mounting structure on the auxiliary stand 2, the accessible is connected hangers 16 and is assembled spacing auxiliary device on rail laying device in order to regard as the adjustable limit structure of detachable.

Wherein, rail body 1 can be the rail of cross section for T type structure or triangle-shaped structure, and this device is applicable to the rail that the cross section is trapezium structure or other similar structures among the prior art similarly, the utility model discloses operating condition picture when rail body 1 is cross section triangle-shaped structure is shown in fig. 4.

The working principle is as follows:

in the rail laying process, when needing to carry out spacing to rail body 1, erect the device in the outside of rail body 1, spacing mechanism's interval and angle are adjusted through roll adjustment mechanism and angle modulation mechanism according to the structure and the specification of rail body 1, thereby make the lateral part laminating of spacing mechanism and rail body 1 in order to carry out spacingly to rail body 1, the roll adjustment in-process, can carry out accurate positioning to spacing mechanism according to the reading of scale 10, the angle modulation in-process, accessible electronic control unit 15 control angle modulation steering wheel 5 pivoted angle, and can assemble the device wholly through connecting hangers 16 on rail laying device in order to regard as the adjustable limit structure of detachable, the mode of operation is various.

The beneficial effects of the utility model are that be equipped with roll adjustment mechanism and angle modulation mechanism, can adjust stop gear's interval and angle according to the structure and the actual conditions of rail body, thereby it is spacing to polytype rail body in the rail laying process, prevent that the skew from appearing in the rail, use in a flexible way, and be equipped with the reading structure, can carry out the accuracy to the rail body of different specifications spacing, simultaneously can assemble spacing auxiliary device in order to regard as the adjustable limit structure of detachable on the rail laying device, the mode of operation is various, therefore, the clothes hanger is strong in practicability.

The above detailed description of one embodiment of the present invention is only for the purpose of illustrating the preferred embodiments of the present invention, and should not be taken as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The limiting auxiliary device for laying the steel rail for sliding of the hoisting equipment comprises a steel rail body (1) and an auxiliary support (2), wherein the steel rail body (1) is laid on the ground, the auxiliary support (2) is erected on the outer side of the steel rail body (1), and is characterized by further comprising a distance adjusting mechanism for adjusting the distance between the limiting mechanisms, an angle adjusting mechanism for adjusting the angle of the limiting mechanisms and a limiting mechanism for limiting the steel rail body (1), wherein the distance adjusting mechanism is positioned on two sides of the lower portion of the auxiliary support (2), the angle adjusting mechanism is positioned at one end, away from the auxiliary support (2), of the distance adjusting mechanism, and the limiting mechanism is positioned at one end, away from the auxiliary support (2), of the distance adjusting mechanism and positioned on two sides of the steel rail body (1) corresponding to the angle adjusting mechanism.

2. The limiting auxiliary device for laying the steel rail for the slippage of the hoisting equipment as claimed in claim 1, wherein the distance adjusting mechanism comprises two distance adjusting screw rods (3) and two distance adjusting supports (4), the two distance adjusting screw rods (3) are symmetrically arranged on two sides of the lower portion of the auxiliary support (2) and penetrate through the auxiliary support (2) to be in threaded connection with the auxiliary support (2), the two distance adjusting screw rods (3) are oppositely arranged, the two distance adjusting supports (4) are correspondingly arranged on the two distance adjusting screw rods (3), and the two distance adjusting supports (4) are respectively arranged at one ends of the two distance adjusting screw rods (3) which are oppositely arranged and are rotatably connected with the corresponding distance adjusting screw rods (3).

3. The limiting auxiliary device for laying steel rails for sliding of hoisting equipment as claimed in claim 2, wherein the angle adjusting mechanism comprises angle adjusting steering engines (5) and angle adjusting shafts (6), two groups of angle adjusting steering engines (5) are provided corresponding to two groups of distance adjusting supports (4), two groups of angle adjusting steering engines (5) are respectively provided at one side of two groups of distance adjusting supports (4) and are fixedly connected with the corresponding distance adjusting supports (4), the output ends of the angle adjusting steering engines (5) penetrate through the corresponding distance adjusting supports (4), two groups of angle adjusting shafts (6) are provided corresponding to two groups of angle adjusting steering engines (5), two groups of angle adjusting shafts (6) are respectively provided in the middle parts of the two groups of distance adjusting supports (4) and are rotatably connected with the corresponding distance adjusting supports (4), and the output ends of the two groups of angle adjusting steering engines (5) are respectively fixedly connected with one ends of the two groups of angle adjusting shafts (6).

4. The limiting auxiliary device for laying the steel rail for slipping of the hoisting equipment as claimed in claim 3, wherein the limiting mechanism comprises two limiting mounting blocks (7) and two limiting plates (8), the two limiting mounting blocks (7) are provided with two groups corresponding to the two groups of angle adjusting shafts (6), the two groups of limiting mounting blocks (7) are respectively provided at the middle parts of the two groups of angle adjusting shafts (6) and are fixedly connected with the corresponding angle adjusting shafts (6), one ends of the limiting mounting blocks (7) are located at the inner sides of the distance adjusting supports (4) and the other ends of the same protrude out of the distance adjusting supports (4), the two groups of limiting plates (8) are provided with two groups corresponding to the limiting mounting blocks (7), the two groups of limiting plates (8) are respectively provided at the two sides of the steel rail body (1) and are attached to the steel rail body (1).

5. The limiting auxiliary device for laying the steel rail for slipping of the hoisting equipment according to claim 4, further comprising a limiting protection pad (9), wherein the limiting protection pad (9) is disposed on one side of the limiting plate (8) close to the steel rail body (1) and is fixedly connected with the limiting plate (8), and the limiting plate (8) is attached to the steel rail body (1) through the limiting protection pad (9).

6. A limiting auxiliary device for laying a steel rail for slipping of a hoisting device according to claim 4, further comprising a graduated scale (10), wherein the graduated scale (10) is arranged at the upper part of the inner side of the auxiliary support (2) and is fixedly connected with the auxiliary support (2), and the graduated scale (10) is horizontally arranged corresponding to the distance adjusting mechanism.

7. A limiting auxiliary device for laying a steel rail for slipping of a hoisting device according to claim 6, further comprising a protection mechanism, wherein the protection mechanism comprises a protection block (11) and an anti-abrasion pad (12), the protection block (11) is arranged on the upper portion of the inner side of the auxiliary support (2) corresponding to the graduated scale (10) and is fixedly connected with the auxiliary support (2), the anti-abrasion pad (12) is arranged on the bottom of the protection block (11) and is fixedly connected with the protection block (11), and the anti-abrasion pad (12) is arranged below the graduated scale (10) and above the steel rail body (1).

8. A limiting auxiliary device for laying a steel rail for slipping of a hoisting device according to claim 7, further comprising a moving mechanism, wherein the moving mechanism comprises a moving base (13) and a moving universal wheel (14), the moving base (13) is arranged at the bottom of the auxiliary support (2) and fixedly connected with the auxiliary support (2), the moving universal wheel (14) is arranged at the bottom of the moving base (13) and fixedly connected with the moving base (13), and the auxiliary support (2) is erected outside the steel rail body (1) through the moving base (13) and the moving universal wheel (14).

9. The limiting auxiliary device for laying the steel rail for slipping the hoisting equipment as claimed in claim 8, further comprising an electric control unit (15), wherein the electric control unit (15) is arranged on one side of the upper part of the auxiliary support (2) and is fixedly connected with the auxiliary support (2), and the electric control unit (15) is electrically connected with the angle modulation steering engine (5).

10. A limiting auxiliary device for laying a steel rail for slipping of hoisting equipment as claimed in claim 1, further comprising two groups of connecting lugs (16), wherein the two groups of connecting lugs (16) are respectively arranged on two sides of the upper part of the auxiliary support (2) and fixedly connected with the auxiliary support (2).