CN210999344U - Precast beam stretch-draw handling frame - Google Patents

Abstract

The utility model relates to a precast beam stretch-draw handling frame, it includes braced frame, the chain block, braced frame is last to be equipped with the I-steel rather than sliding connection, braced frame is last to install the worm, the worm top is equipped with the worm wheel rather than the transmission is connected, be equipped with on the worm wheel rather than coaxial pivoted roller bearing, around having on the roller bearing and being used for pulling the gliding wire rope of I-steel along vertical direction. The braced frame is formed by the channel-section steel spelling welding, thereby handling frame overall structure is fairly stable, easily operation, the I-steel removes along vertical direction and adjusts the jack and reach the high stretch-draw operation that realizes of prestressing tendons, and when the motor of installing in the I-steel recess needs the maintenance, perhaps be used for when the various steel tile that the sunshade kept off the rain need be changed, and the I-steel itself need maintain or can both realize corresponding maintenance or change through reducing the I-steel when changing, and convenient for operation, mechanical degree of automation is high.

Description

Precast beam stretch-draw handling frame

Technical Field

The utility model relates to a bridge construction equipment technical field, concretely relates to precast beam stretch-draw handling frame.

Background

Along with the vigorous popularization of green construction, more and more bridge constructions adopt a prefabricating technology, and concrete pouring and prestress tensioning are all completed in a precast beam yard. In the precast beam tensioning construction, especially for a large-span precast beam, the height of a beam body is very large, a tensioning jack is very inconvenient in the up-and-down moving process, the tensioning stress is easy to meet the requirement, and even safety accidents are caused because the large jack is not fixed stably.

At present, the chinese patent with application number 201820020680.7 in the market discloses a movable operation frame for tensioning a precast beam, which can slide along the groove of an i-beam through an upper chain block and adjust the height of a jack through the chain block so as to achieve the operation of tensioning a prestressed tendon.

However, the i-steel on the handling frame is fixedly welded on the top of the supporting frame of the handling frame, and the height of the supporting frame is far higher than that of a normal person when the normal person stretches out, so that when the i-steel is rusted or abraded and needs to be maintained, corresponding maintenance and replacement must be performed by means of climbing equipment, the operation is complicated, and the maintenance personnel have climbing safety risks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a precast beam stretch-draw handling frame, the I-steel on this handling frame can slide along vertical direction, very convenient again in the maintenance or the change of part when satisfying the regulation jack height.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides a precast beam stretch-draw handling frame, includes braced frame, the braced frame top is equipped with the I-steel, be equipped with the chain block that links to each other with the stretch-draw jack on the I-steel, the I-steel slides along vertical direction and braced frame and is connected, the last rotation of braced frame is connected with the worm, the worm top is equipped with the worm wheel rather than the transmission is connected, be equipped with rather than coaxial pivoted roller bearing on the worm wheel, around having and being used for pulling the gliding wire rope of I-steel along vertical direction on the roller bearing.

By adopting the technical scheme, the support frame is formed by assembling and welding channel steel, so that the whole frame structure of the operation frame is stable, the operation is easy, the jack reaches the height of the prestressed tendon by moving the chain block, and the tensioning jack is convenient to install on the prestressed tendon; the worm rotates to drive the worm wheel to drive the coaxial rotating roller arranged on the worm wheel to rotate, the wire rope wound on the roller is tensioned and loosened by the forward and reverse rotation of the roller, so that the I-shaped steel slides along the vertical direction, the I-shaped steel is convenient to maintain after the I-shaped steel is damaged, the worm teeth are continuous spiral teeth and are continuous when meshed with the teeth of the worm wheel, and the worm teeth do not enter and exit the meshing process, so that the worm wheel is stable in work, small in impact, vibration and noise, small in spiral rising angle of the worm, the worm can only drive the worm wheel to rotate, the worm wheel cannot drive the worm to rotate, and the worm wheel has self-locking property, so that the I-shaped steel cannot move downwards due to the self gravity under the condition that the worm does not rotate.

The utility model discloses further set up to: the utility model discloses a prefabricated beam's auxiliary steel, including I-steel, support frame, first fixed pulley, wire rope, roller bearing, first fixed pulley, second fixed pulley fixed connection are walked around to the one end that the roller bearing was kept away from to wire rope, the last vertical direction of following of I-steel is equipped with the spout with auxiliary steel tip sliding connection, the support frame top is equipped with first fixed pulley, and the middle part welding that is located the auxiliary steel of intermediate position has rings, keeps away from the fixed second fixed pulley that is equipped with in middle part of the auxiliary steel of precast beam, wire rope keeps away from the one.

Through adopting above-mentioned technical scheme, supplementary steel has realized the reinforcement to the I-steel, thereby wire rope has realized wire rope to the pulling of I-steel through first fixed pulley and second fixed pulley fixed connection on rings, and rings welding makes the I-steel steady along vertical direction removal in-process at the middle part of middle supplementary steel.

The utility model discloses further set up to: one end of the supporting frame far away from the precast beam is provided with a stand column perpendicular to the I-steel, the stand column upper surface is parallel and level with the I-steel upper surface, a wheel groove is formed in the stand column along the vertical direction, a first roller is installed at one end, close to the stand column, of the I-steel, and the first roller rolls along the vertical direction in the wheel groove.

Through adopting above-mentioned technical scheme, the stand welding has promoted the holistic stability of handling frame on braced frame, and first gyro wheel has realized the removal of I-steel along vertical direction on braced frame along vertical direction's roll in the race, under the support of first gyro wheel, can be more steady realize sliding of I-steel.

The utility model discloses further set up to: and an oil dripping gun for lubricating the wheel groove is arranged at one end, far away from the precast beam, of the upper surface of the I-steel.

By adopting the technical scheme, the wheel groove is automatically lubricated all the time by the arrangement of the oil dripping gun.

The utility model discloses further set up to: the support rod is welded on the I-shaped steel, a second roller is installed at one end, far away from the welding, of the support rod, the second roller rolls in the wheel groove along the vertical direction, and a connecting rod is arranged between a wheel shaft of the first roller and a wheel shaft of the second roller.

Through adopting above-mentioned technical scheme, the bracing piece had both consolidated and supported the I-steel, installed and kept away from the second gyro wheel of welded one end at the bracing piece and had increased the roll effect of I-steel on braced frame again well, and the connecting rod that sets up between first gyro wheel and second gyro wheel has guaranteed the synchronization of first gyro wheel and second gyro wheel roll linear velocity.

The utility model discloses further set up to: one end of the I-steel, which is close to the precast beam, extends outwards to form a supporting frame, a motor which slides along the groove is arranged in the groove of the I-steel, one end of the chain block is fixedly connected with a rotating shaft of the motor, and a hook used for hanging a jack is arranged at the other end of the chain block.

Through adopting above-mentioned technical scheme, thereby the one end that is close to the precast beam of I-steel has guaranteed outside outwards to extend the braced frame that can both accomplish the operation to prestressing tendons stretch-draw no matter the size of a dimension of precast beam, and the motor slides and sets up in the recess of I-steel, has realized through the rotation of motor that the jack withstands prestressing tendons and moves to the stretch-draw position that needs along the direction of stretch-draw.

The utility model discloses set up further to the oil drip rifle is including setting up the oil storage box at the I-steel top, the oil storage box front end is equipped with defeated oil pipe, defeated oil pipe sets up along I-steel length direction, defeated oil pipe communicates with each other with the oil storage box, defeated oil pipe bottom is opened there is the oilhole, the oilhole is located directly over the race, be equipped with along the gliding push rod of defeated oil pipe length direction in defeated oil pipe's the inner chamber, the push rod afterbody is equipped with the spring, spring one end and push rod fixed connection, the inner wall fixed connection of the other end and oil storage box, be equipped with L type oil pipe in the push rod, L type oil pipe one end communicates with each other with the oil storage box, and the other end extends to the push rod bottom surface, the push rod front end stretches out defeated oil pipe and is equipped with the inclined plane towards the stand, the inclined plane is located.

By adopting the technical scheme, when the I-steel is positioned at the highest point, the inclined plane is positioned on the upper surface of the upright column, namely the inclined plane is not in contact with the upright column and is not acted by the action force of the upright column, the push rod cannot be driven by the inclined plane to move into the oil conveying pipe, the oil hole is not coaxially communicated with the L-type oil pipe, oil dripping of the oil hole cannot occur, when the I-steel moves along the vertical direction to adjust the height of the jack, the inclined plane naturally contacts with the upright column and is acted by the upright column, the push rod is driven by the inclined plane to move into the oil conveying pipe, when the inclined plane is positioned in the wheel groove, the oil hole is coaxially communicated with the L-.

The utility model discloses further set up to: the supporting frame is provided with protection plates on three sides in a surrounding mode, and a bottom plate is arranged at the bottom of the supporting frame.

Through adopting above-mentioned technical scheme, the setting of guard plate and bottom plate prevents that the ground tackle clamping piece from popping out and hindering the people among the tensioning process.

The utility model discloses further set up to: the color steel tile used for shading sun and rain is arranged above the auxiliary steel, and the magnet used for adsorbing the color steel tile is arranged between the color steel tile and the auxiliary steel.

By adopting the technical scheme, the color steel tile is very conveniently arranged on the I-shaped steel due to the adsorption effect of the magnetite on steel, and the effect of shading sun and shielding rain is particularly used for damp protection of the motor.

The utility model discloses further set up to: four universal wheels used for moving the supporting frame are arranged at the bottom of the bottom plate.

Through adopting above-mentioned technical scheme, the universal wheel has realized the free movement of whole handling frame.

Compared with the prior art, the utility model has the following advantage:

1. the motor is arranged to pull the chain block, the chain block does not need to be pulled manually, the efficiency is high, the accuracy is good, and the I-shaped steel can slide on the upright column along the vertical direction, so that the height of the jack can be adjusted, the maintenance or replacement of parts is very convenient, the climbing maintenance operation is not needed, and the life safety of maintenance personnel is guaranteed;

2. the device for driving the I-shaped steel to roll along the vertical direction comprises worm and gear transmission, wherein worm teeth are continuous spiral teeth and are continuous when being meshed with worm teeth, and the worm teeth do not enter and exit the meshing process, so that the device is stable in work, small in impact, vibration and noise, small in spiral angle of the worm, capable of only driving the worm gear to transmit, incapable of driving the worm to rotate, self-locking, and capable of ensuring that the I-shaped steel cannot move downwards due to the gravity of the I-shaped steel under the condition that a motor does not work;

3. the color steel tile plays a role in shading sun and rain, and particularly protects the motor from being affected with damp.

Drawings

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

Fig. 2 is a schematic view of the mounting structure of the i-steel of the present invention.

Fig. 3 is a cross-sectional view of the oil dripping gun of the present invention.

In the attached drawings, 1-supporting frame, 2-I-steel, 3-chain block, 4-oil dropping gun, 5-chute, 6-worm, 7-worm wheel, 8-roller, 9-steel wire rope, 10-auxiliary steel, 11-second fixed pulley, 14-first fixed pulley, 15-flying ring, 16-upright post, 17-wheel groove, 18-first roller, 19-supporting rod, 20-second roller, 21-connecting rod, 22-motor, 23-hook, 24-inclined plane, 25-protecting plate, 26-bottom plate, 27-magnet stone, 28-color steel tile, 29-universal wheel, 41-oil hole, 42-push rod, 43-spring, 44-L type oil pipe, 45-oil storage box and 46-oil conveying pipe.

Detailed Description

The present invention is further described in detail below with reference to the accompanying drawings, 1-3.

Referring to fig. 1, for the utility model discloses a precast beam stretch-draw handling frame, including braced frame 1, braced frame 1 top is equipped with I-steel 2, and the 2 levels of I-steel set up, are equipped with chain block 3 on the I-steel 2, and I-steel 2 rotates along vertical direction and braced frame 1 sliding connection on the braced frame 1 and is connected with worm 6, and 6 tops of worm are equipped with the worm wheel 7 of being connected rather than the transmission, are equipped with on the worm wheel 7 rather than coaxial pivoted roller bearing 8, around having on the roller bearing 8 to be used for pulling the gliding wire rope 9 of I-steel 2 edge vertical direction.

Referring to fig. 1 and 2, auxiliary steels 10 are vertically fixed on an i-beam 2, the auxiliary steels 10 are arranged in an array along the length direction of the i-beam 2, a sliding groove 5 connected with the end of the auxiliary steel 10 in a sliding manner is vertically arranged on a supporting frame 1, a first fixed pulley 14 is arranged at the top of the supporting frame 1, a hanging ring 15 is welded at the middle part of the auxiliary steel 10 at the middle position, a second fixed pulley 11 is fixedly arranged at the middle part of the auxiliary steel 10 far away from a precast beam, one end of a steel wire rope 9 far away from a rolling shaft 8 passes around the first fixed pulley 14, second fixed pulley 11 fixed connection is on rings 15, and braced frame 1 is formed by channel-section steel assembly welding and makes the whole frame stable in structure of handling frame, easily operation, thereby I-steel 2 passes through worm wheel 7 worm 6 and stay cord 9, thereby can remove along vertical direction and realize adjusting the height that the jack reaches the prestressing tendons, and convenient maintenance or change I-steel 2 and accessory part.

When the I-steel reinforcing device works, the worm 6 is rotated, the worm 6 is rotationally transmitted to the worm wheel 7 to drive the coaxial rotating roller 8 arranged on the worm wheel 7 to rotate, the tensioning and the releasing of the steel wire rope 9 wound on the roller 8 are realized through the forward and reverse rotation of the roller 8, so that the sliding of the I-steel 2 along the vertical direction is realized, the teeth of the worm 6 are continuous spiral teeth, the continuous spiral teeth are continuously meshed with the teeth of the worm wheel 7, the teeth of the worm 6 do not enter and exit the meshing process, therefore, the work is stable, the impact, the vibration and the noise are small, the spiral rising angle of the worm 6 is small, the worm 6 can only drive the worm wheel 7 to transmit, the worm wheel 7 cannot drive the worm 6 to rotate, the self-locking performance is realized, the I-steel 2 cannot move downwards due to the self gravity of the I-steel 2 under the condition that the worm 6 does not rotate, the auxiliary steel 10 realizes the reinforcing of the I-steel 2, the steel wire rope, the hanging ring 15 is welded in the middle of the middle auxiliary steel, so that the I-shaped steel 2 is stable in the process of moving along the vertical direction.

Referring to fig. 1, an upright post 16 perpendicular to an i-beam 2 is arranged at one end, far away from a precast beam, of a support frame 1, the upper surface of the upright post 16 is flush with the upper surface of the i-beam 2, a wheel groove 17 is formed in the upright post 16 along the vertical direction, a first roller 18 is arranged at one end, close to the upright post 16, of the i-beam 2, the first roller 18 rolls in the wheel groove 17 along the vertical direction, an oil dripping gun 4 used for lubricating the wheel groove 17 is arranged at one end, far away from the precast beam, of the upper surface of the i-beam 2, the upright post 16 is welded on the support frame 1, the overall stability of the operation frame is improved, the movement of the i-beam 2 on the support frame 1 along the vertical direction is realized through the rolling of the first roller 18 in the wheel groove 17 along the vertical direction, and.

Referring to fig. 1, a support rod 19 is welded on an i-steel 2, a second roller 20 is installed at one end, far away from welding, of the support rod 19, the second roller 20 rolls in a wheel groove 17 along the vertical direction, a connecting rod 21 is arranged between a wheel shaft of the first roller 18 and a wheel shaft of the second roller 20, the support rod 19 not only reinforces and supports the i-steel 2, the second roller 20 installed at one end, far away from welding, of the support rod 19 but also well increases the rolling effect of the i-steel 2 on the support frame 1, the connecting rod 21 arranged between the first roller 18 and the second roller 20 ensures the synchronization of the rolling linear velocity of the roller 18, one end, close to the precast beam, of the i-steel 2 extends outwards out of the support frame 1, a motor 22 sliding along a groove is arranged in the groove of the i-steel 2, one end of a chain block 3 is fixedly connected with a rotating shaft of the motor 22, the other end is provided with a hook 23 for hanging a jack, and the size of the beam can both complete the operation of tensioning the prestressed tendon, the motor 22 is arranged in the groove of the I-shaped steel 2 in a sliding mode, and the jack is enabled to pull the prestressed tendon to move to a required tensioning position along the tensioning direction through the rotation of the motor 22.

Referring to fig. 2 and 3, the oil dropping gun 4 comprises an oil storage box 45 arranged at the top of the i-steel 2, an oil delivery pipe 46 is arranged at the front end of the oil storage box 45, the oil delivery pipe 46 is arranged along the length direction of the i-steel 2, the oil delivery pipe 46 is communicated with the oil storage box 45, an oil hole 41 is formed in the bottom of the oil delivery pipe 46, a push rod 42 sliding along the length direction of the oil delivery pipe 46 is arranged in an inner cavity of the oil delivery pipe 46, a spring 43 is arranged at the tail of the push rod 42, one end of the spring 43 is fixedly connected with the push rod 42, the other end of the spring is fixedly connected with the inner wall of the oil storage box 45, a L-shaped oil pipe 44 is arranged in the push rod 42, one end of the L-shaped oil pipe 44 is communicated with the oil storage box 45, the other end of the push rod 42 extends out of the oil delivery pipe 46 and is provided with an inclined surface 24 facing the upright post 16, the inclined surface 24 is positioned on the upper surface of the upright post 16 when the i-steel 2 is positioned at the highest point, the inclined surface 24 is not contacted with the upright post 16, the oil pipe 16, the inclined surface is not contacted with the oil delivery pipe 24, the oil dropping gun does not contact with the oil dropping gun 24, the oil delivery pipe, the oil dropping gun 24, the oil dropping gun does not move to the oil hole 41, the oil delivery pipe, the oil dropping gun does not contact with the oil dropping gun, the oil hole 41, the.

Referring to fig. 1, three sides of braced frame 1 are encircleed and are equipped with guard plate 25, braced frame 1 bottom is equipped with bottom plate 26, guard plate 25 and bottom plate 26 set up and prevent that the anchorage device clamping piece pops out and hurts the people in the stretching-drawing process, auxiliary steel 10 top is equipped with the various steel tile 28 that is used for the sunshade to keep off the rain, be equipped with the magnetite 27 that is used for adsorbing various steel tile 28 between various steel tile 28 and the auxiliary steel 10, magnetite 27 makes various steel tile 28 very conveniently set up on i-steel 2 to the adsorption of steel, the effect that plays the sunshade to keep off the rain especially to the protection of weing of motor 22, bottom plate 26 bottom is equipped with four universal wheels 29 that are used for removing braced frame 1, universal wheel 29 has.

The implementation principle of the embodiment is as follows: the worm 6 is rotated, the worm 6 is rotationally transmitted to the worm wheel 7 to drive the coaxial rotating roller 8 arranged on the worm wheel 7 to rotate, the steel wire rope 9 wound on the roller 8 is tensioned and loosened through forward and reverse rotation of the roller 8, movement of the I-shaped steel 2 in the vertical direction is realized, the jack is adjusted to reach the height of the prestressed tendon, the motor 22 is arranged in the groove of the I-shaped steel 2 in a sliding mode, the jack is pulled by the prestressed tendon to move to a required tensioning position in the tensioning direction through rotation of the motor 22, and accordingly tensioning operation of the prestressed tendon is completed; when the I-steel 2 is positioned at the highest point, the inclined plane 24 is positioned on the upper surface of the upright column 16, namely the inclined plane 24 does not contact the upright column 16 and is not acted by the upright column 16, at the moment, the inclined plane 24 cannot move into a gun mouth, two oil holes in the oil dropping gun 4 are not coaxially communicated, and oil does not drop; when the I-steel 2 moves in the vertical direction to adjust the height of the jack, the inclined surface 24 naturally contacts with the upright post 16 and receives the acting force of the upright post 16, at the moment, the inclined surface 24 moves towards the gun mouth to enable two oil holes in the oil dropping gun 4 to be coaxially communicated, oil is dropped from the oil holes, and the wheel groove is lubricated all the time.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides a precast beam stretch-draw handling frame, includes braced frame (1), braced frame (1) top is equipped with I-steel (2), be equipped with chain block (3) that link to each other with the stretch-draw jack on I-steel (2), its characterized in that: i-steel (2) slide along vertical direction and braced frame (1) and be connected, it is connected with worm (6) to rotate on braced frame (1), worm (6) top is equipped with worm wheel (7) rather than the transmission is connected, be equipped with on worm wheel (7) rather than coaxial pivoted roller bearing (8), around having on roller bearing (8) and being used for drawing I-steel (2) along the gliding wire rope (9) of vertical direction.

2. A precast beam tension handling frame according to claim 1, wherein: perpendicular fixed has a plurality of auxiliary steel (10), a plurality of on I-steel (2) auxiliary steel (10) are arranged along I-steel (2) length direction array, be equipped with spout (5) with auxiliary steel (10) tip sliding connection along vertical direction on braced frame (1), braced frame (1) top is equipped with first fixed pulley (14), and the middle part welding that is located the auxiliary steel (10) of intermediate position has rings (15), keeps away from the fixed second fixed pulley (11) that is equipped with in middle part of auxiliary steel (10) of precast beam, the one end that roller bearing (8) were kept away from in wire rope (9) is around first fixed pulley (14), second fixed pulley (11) fixed connection on rings (15).

3. A precast beam tension handling frame according to claim 1 or 2, wherein: one end of the supporting frame (1) far away from the precast beam is provided with a stand column (16) perpendicular to the I-steel (2), the upper surface of the stand column (16) is flush with the upper surface of the I-steel (2), a wheel groove (17) is formed in the stand column (16) along the vertical direction, a first roller (18) is installed at one end, close to the stand column (16), of the I-steel (2), and the first roller (18) rolls along the vertical direction in the wheel groove (17).

4. A precast beam tension handling frame according to claim 3, wherein: and an oil dripping gun (4) used for lubricating the wheel groove (17) is arranged at one end, far away from the precast beam, of the upper surface of the I-steel (2).

5. A precast beam tension handling frame according to claim 4, wherein: a supporting rod (19) is welded on the I-shaped steel (2), a second roller (20) is installed at one end, far away from the welding, of the supporting rod (19), the second roller (20) rolls in a wheel groove (17) along the vertical direction, and a connecting rod (21) is arranged between a wheel shaft of the first roller (18) and a wheel shaft of the second roller (20).

6. A precast beam tension handling frame according to claim 1 or 2, wherein: one end, close to the precast beam, of the I-steel (2) extends outwards to form a supporting frame (1), a motor (22) sliding along the groove is arranged in the groove of the I-steel (2), one end of the chain block (3) is fixedly connected with a rotating shaft of the motor (22), and a hook (23) used for hanging a jack is arranged at the other end of the chain block.

7. A precast beam stretch-draw handling frame according to claim 4, characterized in that the oil dripping gun (4) comprises an oil storage box (45) arranged at the top of the I-shaped steel (2), an oil delivery pipe (46) is arranged at the front end of the oil storage box (45), the oil delivery pipe (46) is arranged along the length direction of the I-shaped steel (2), the oil delivery pipe (46) is communicated with the oil storage box (45), an oil hole (41) is formed in the bottom of the oil delivery pipe (46), the oil hole (41) is located right above the wheel groove (17), a push rod (42) sliding along the length direction of the oil delivery pipe (46) is arranged in an inner cavity of the oil delivery pipe (46), a spring (43) is arranged at the tail of the push rod (42), one end of the spring (43) is fixedly connected with the push rod (42), the other end of the spring is fixedly connected with the inner wall of the oil storage box (45), an L-type oil pipe (44) is arranged in the push rod (42), one end of the L-type oil pipe (44) is communicated with the oil storage box (45), the other end of the push rod (42) extends to the bottom surface of the I-type oil delivery pipe (24), and the upright post (16) is located at the highest point of the I-type oil delivery pipe (16), and the upright post (17).

8. A precast beam tension handling frame according to claim 1, wherein: three sides of the supporting frame (1) are provided with protective plates (25) in a surrounding mode, and a bottom plate (26) is arranged at the bottom of the supporting frame (1).

9. A precast beam tension handling frame according to claim 2, wherein: the color steel tile (28) is arranged above the auxiliary steel (10), and a magnet (27) used for adsorbing the color steel tile (28) is arranged between the color steel tile (28) and the auxiliary steel (10).

10. A precast beam tension handling frame according to claim 8, wherein: four universal wheels (29) used for moving the supporting frame (1) are arranged at the bottom of the bottom plate (26).

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