KR20140067467A - Transfer cart - Google Patents

Abstract

The present invention relates to a transferring carrier capable of increasing a lifting stroke of a loading unit by forming a moving passage where the upper and lower parts of an X-link are moved to be inclined. According to the present invention, the transferring carrier includes: a base unit with transferring wheel; the loading unit formed to be vertically lifted on the top of the base unit and capable of loading loads; a link connection unit with the X-link to support the loading unit with respect to the base unit to be lifted whereby first and second link members are installed to slide the upper and lower parts of the first and second link members on the loading unit and base unit in the longitudinal direction respectively connected to be across around a rotary shaft in an X-shaped form; an elastic supporting unit installed on the base unit or loading unit, connected to the rotary shaft, and lifts the rotary shaft upwardly to the base unit; and a link guide unit which guides the ends of the first and second link members to move in a tilt direction from the horizontal direction at a predetermined angle when the ends of the first and second link members are moved along the loading unit and base unit.

Description

Transfer cart

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyance truck, and more particularly, to a conveyance truck capable of increasing an ascending / descending stroke of a stacking portion by forming a slope of a travel path through which an upper end and a lower end of an X-

Generally, a conveyance truck is for conveying a load, and includes a loader for loading the load and a wheel for moving the loader.

However, since the conveying carriage of the related art has a fixed height, the user has to bend his or her back or leg according to the height of the load when the user moves the load.

In order to solve such a problem, Korean Patent Registration No. 10-0306632 discloses a device for adjusting a height of a bogie. The conventional conveying bogie is capable of adjusting the height of the upper plate by pneumatic pressure input / output through the operation of the push lever. However, since the height of the upper plate is directly adjusted by the user, the efficiency of the work is lowered. Therefore, for the sake of convenience of the work, the loading car is automatically raised or lowered depending on whether or not the loaded cargo is loaded so that the cargo is located at the same height regardless of the cargo load amount, .

In order to solve these problems, the applicant applied for a height-adjustable transfer car in Korean Patent Application Nos. 10-2008-0124682 and 10-2009-0024421, all of which were patented.

Conventionally, since the upper and lower ends of the link member are formed so as to slide in the horizontal direction along the base portion and the loading portion, the lifting and lowering strokes of the loading portion are limited to the lengths of the loading portion and the base portion.

Registered patent publication No. 10-0306632: elevator control device of bogie Japanese Patent Application Laid-Open No. 10-1001677: A conveying device having a conveyed object support which ascends and descends

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a link guide unit for guiding a sliding direction of an upper end and a lower end of a link member, The object of the present invention is to provide a transfer truck which can increase the stroke.

According to an aspect of the present invention, there is provided a conveyance truck comprising a base on which a conveying wheel is mounted, a loading unit vertically movably installed on an upper portion of the base unit and configured to load the load, And the first and second link members, the upper and lower ends of which are slidably mounted on the mounting portion and the base portion, respectively, in a longitudinal direction, are connected to each other so as to intersect with each other about the rotation axis in an X- An elastic supporting portion provided at the base portion or the loading portion and connected to the rotating shaft to move the rotating shaft up and down with respect to the base portion, and an elastic support portion provided at the end portion of the first and second link members, The end portions of the first and second link members are inclined at a predetermined angle with respect to the horizontal direction And a link guide portion for guiding to travel along an inclined direction.

The link guide portion may be formed with a guide hole which is inclined upwardly as it extends toward the center from the front and the rear of the base portion and the loading portion, and guides the upper and lower ends of the first and second link members.

The mounting portion may include a fixing plate coupled to an upper end of the link connection portion and a rotary plate rotatably mounted on the upper portion of the fixing plate so that a load is seated on the upper surface of the fixing plate. A thrust bearing is mounted on the rotary shaft and the fixed plate to support the upper and lower ends of the center shaft so as to be rotatable, It is preferable that a roller is provided.

And an auxiliary lifting unit installed on the base and capable of lifting the base upwards at a predetermined interval with respect to the supporting surface. The auxiliary lifting unit is rotatably installed on the base, A support portion for supporting the transfer wheel so that the transfer wheel contacts the support surface and supports the transfer wheel so that the transfer wheel is spaced upward from the support surface when the transfer wheel rotates downward, An auxiliary actuator connected to a cylinder rod at one side of the auxiliary wheel unit to rotate the auxiliary wheel unit by drawing and pulling the cylinder rod, the cylinder body being supported by the base unit, And the hydraulic pressure is supplied to the cylinder Is installed on, preferably it comprises a main actuator with a manual lever for the feed of the oil pressure provided.

The loading unit includes a lift plate supported on an upper end of the link connection portion, a first support frame and a second support frame provided on the lift plate, and a second support frame rotatably coupled to the first support frame, A plurality of pivoting dampers, and gas springs respectively coupled to the pivoting plates, one end of which is supported by the second support frame and the other end is vertically spaced apart, The pivoting plate is compressed by a load of the load to support the pivoting plate so that the pivoting plate extends along the horizontal direction, and when the load is removed, the pivoting plate is pivoted to extend up and down.

Wherein the clamping portion is fixed to the loading portion and the gripping hole is formed such that the inner circumferential surface of the gripping portion is in contact with the outer circumferential surface of the rod member when the rod member passes through the clamping portion, A clamping body formed on one side of the clamping body, the clamping body being formed with vertically extending incisions so that the inner circumferential surface of the clamping body is closely contacted with the rod member or spaced apart from the rod member according to the distance between the incisions; A bolt member inserted in a bolt coupling hole formed so as to adjust a spacing distance and adjusting a distance between the cutout portions as the bolt is rotated in one direction or the other direction; and a bolt member provided on one side of the bolt member, The diameter of the gripping hole is adjusted so that the distance between the clamping body and the rod member It may be provided with a clamping lever for adjusting the size of the frictional force.

The elastic supporting portion includes a main elastic member whose upper end is supported by the loading portion and whose lower end is connected to the rotation axis of the link connecting portion, A main body having a main elastic member supported on the loading portion and having a lower end opened; a drawing member having an inner hollow portion coupled to the body so as to be drawn out or pulled downward; And a shaft connecting member which is supported by the drawing member and has both ends connected to the rotating shaft of the link connecting portion and connecting the drawing member to the rotating shaft And the auxiliary elastic member includes a fixed support plate fixed to the body, A screw rod extending from the shaft connecting member so as to pass through the movable support plate, a screw rod provided to surround the screw rod, a lower end supported by the shaft connecting member, And a compression spring that contacts the movable support plate when it is drawn into the body.

Wherein the auxiliary elastic member includes a screw rod extending from the movable support plate toward the fixed support plate and passing through the fixed support plate and having threads formed on the outer peripheral surface thereof for connecting the movable support plate to the fixed support plate so that the movable distance can be adjusted, Wherein the screw rod is rotatably supported on the movable support plate and the screw rod is formed in the inner peripheral surface of the fixed support plate so as to correspond to the screw rod of the screw rod, The screw rod is vertically moved up and down with respect to the stationary support plate so that the movable support plate is lifted up and down to adjust the distance between the movable support plate and the stationary support plate.

Wherein the stacking unit includes a stacking plate supported on an upper portion of the link connection portion and a plurality of extension rails extending along the width direction and spaced apart from each other in the longitudinal direction on an upper surface of the stacking plate, And a sliding member that moves along the extension rail to expand or contract the loading area of the loading unit.

Wherein the width adjusting unit includes an auxiliary rail extending in a direction corresponding to an extending direction of the extension rail at a position corresponding to the extension rail in the base portion and an auxiliary guide rod extending downward from the auxiliary rail, And a width adjusting driving unit for moving the sliding member along an extending direction of the extension rail, wherein the sliding member includes a body having a through hole formed therein so as to vertically penetrate the auxiliary guide rod, A cover portion extending to cover an upper surface of the rail and supporting a lower end of the rail, and a rack extending from the body to be inserted into the hollow formed in the extension rail and having gear teeth formed on the lower surface thereof, Is provided on the lower portion of the redistric plate and is provided with a rotation bar , And the pinion is provided the rotary bar is engaged with the rack through the exposure hole formed in the trial ever, is installed on one side of the rotation bar is preferably provided with a handle for rotating the rotating bar.

Since the linking member according to the present invention slides along the inclined guide hole, the lifting and lowering stroke of the loading unit is increased and the usability is improved, compared to a normal transporting vehicle having the base unit and the loading unit of the same length.

1 is a perspective view showing a first embodiment of a conveyance truck according to the present invention,
Fig. 2 is a side view showing a state in which the loading section of the conveying truck shown in Fig.
Fig. 3 is a side view showing a state in which the loading section of the conveyance truck of Fig. 1 is lowered,
4 is a partially cutaway perspective view showing a second embodiment of the conveyance truck,
Fig. 5 is an exploded perspective view of the conveying truck of Fig. 4,
6 and 7 are side views showing a third embodiment of a conveyance truck further including a hydraulic elevating means,
8 is a side view showing a fourth embodiment of a conveyance truck including another embodiment of a loading section having a multi-
Fig. 9 is a partially cutaway perspective view showing a fifth embodiment of a conveyance truck having a clamping unit for blocking the descent of the stacking unit; Fig.
Fig. 10 is a partially cutaway perspective view showing a sixth embodiment of a conveyance truck including another embodiment of the elastic support, Fig.
Fig. 11 is a sectional view showing an elastic supporting portion, Fig.
12 is a perspective view showing a seventh embodiment of the conveyance truck according to the present invention,
13 is a partial cutaway exploded perspective view showing the width adjustment unit of the conveyance truck of FIG. 12,
14 is a cross-sectional view of the conveyance truck of Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 to 3 show a first embodiment of a conveyance truck 100 according to the present invention.

The transporting carriage 100 includes a base 110 and a loading portion 120, a link connecting portion 130, a link guide portion 150, and an elastic supporting portion.

The base portion 110 is provided with a conveying wheel 111, and a rod member 112 constituting a handle is extended from the both sides in the rear. A part of the feed wheels 111 can be freely adjusted by a directional castor so that the operator can freely adjust the moving direction of the base 110.

The loading unit 120 is mounted on the upper side of the base unit 110 so as to be vertically movable through a link connecting unit 130 which will be described later. The upper surface of the loading unit 120 can be loaded with a load Area.

Rod guide grooves 121 through which the rod members 112 extending from the base unit 110 are inserted are formed on both sides of the rear side of the loading unit 120 so as to be drawn inwardly from the outer circumferential surface of the loading unit 120, The rod member 112 guides the up and down direction.

In this embodiment, the upper surface of the loading unit 120 is formed as a flat surface, but the upper surface of the loading unit 120 can be formed in various shapes according to the shape and characteristics of the loading object, A separate rim may be provided along the top edge of the loading unit 120 to prevent the load from being separated.

The link guide unit 150 guides the sliding direction so that the first and second link members 132 and 133 of the link connecting unit 130 to be described later slide along the longitudinal direction of the loading unit 120 and the base unit 110 The upper and lower ends of the first and second link members 132 and 133 are formed so as to travel in a state in which they are inclined at a predetermined angle with respect to the horizontal direction.

2 and 3, the link guide unit 150 includes a first guide member 150 and a second guide member 160 which extend along the upwardly inclined direction from the front side and the rear side of the loading unit 120, The upper and lower ends of the link members 132 and 133 are formed so as to be able to travel. The upper and lower ends of the first and second link members 132 and 133 are inserted into the guide hole 151. The guide hole 151 is formed in the link guide part 150, (151).

The link guide unit 150 may be variously configured as a rail, a profile, or a channel structure that guides the first and second link members 132 and 133 to travel along the inclined direction, .

Since the link guide unit 150 guides the upper and lower ends of the first and second link members 132 and 133 to run along the inclined direction, if the lengths of the loading unit 120 and the base unit 110 are the same The distance traveled by the upper and lower ends of the first and second link members 132 and 133 can be increased as compared with a case where the first and second link members 132 and 133 are moved along the horizontal direction, ) Is increased or decreased.

As described above, the link connection unit 130 supports the loading unit 120 so that the loading unit 120 can vertically move up and down with respect to the base unit 110. The link unit 130 includes two X-links 131 spaced from each other in the left-right direction.

The X-links 131 are formed of first and second link members 132 and 133, respectively, which intersect in an X-shaped configuration. The first and second link members 132 and 133 are rotatable about the rotation axis 134 at the center. And upper and lower ends are slidably installed along the link guide unit 150 in the loading unit 120 and the base unit 110, respectively. Therefore, when the upper and lower ends of the first and second link members 132 and 133 are moved to the front end and the rear end side of the loading unit 120 or the base unit 110 along the direction in which the upper and lower ends of the first and second link members 132 and 133 are moved away from each other, The upper and lower ends of the first and second link members 132 and 133 are brought close to each other so that the loading unit 120 or the base unit 110 is lowered As shown in FIG. 2, when the X-link 131 is moved toward the center, the height of the X-link 131 increases and the stacking unit 120 is raised.

The elastic support part 140 elastically supports the rotary shaft 134 of the X-link 131 downward with respect to the loading part 120 to elastically bias the loading part 120 upward when no external force is applied.

The elastic supporting part 140 includes a body 141 installed in the loading part 110 and a pulling member 145 formed in the lower part of the body 141 so as to be pulled in or pulled out from the body 141 along the vertical direction An elastic spring 143 which is supported on the upper surface of the body 141 and whose lower end is supported by the pulling member 142 to elastically bias the pulling member 142 in a direction in which the pulling member 142 is pulled out with respect to the body 141, And a shaft connecting member 144 that connects the drawing member 142 and the rotating shaft 134.

The body 141 is a hollow cylindrical body having an open bottom and the pulling member 142 is formed as a hollow cylindrical body having an outer diameter corresponding to the inner diameter of the body 141, Respectively.

As described above, the elastic spring 143 is supported by the body 141 and the pull-out member 142 so that the pull-out member 142 is elastically biased in the direction in which the pull-out member 142 is pulled out from the body 141, Both ends of the member 144 are coupled to the rotation shaft 134 and are also connected to the pull-out member to transmit the upward and downward movement of the pull-out member to the rotation shaft. Therefore, when the drawing member 142 descends, the rotating shaft 134 also has to descend downward with respect to the loading unit through the shaft connecting member 144, so that the rotating shaft 134 is raised upward relative to the base 110 .

When the external force is not applied to the loading unit 120, the rotating shaft 134 is held in the raised state with respect to the base unit 110 by the elastic force of the elastic spring 143, When the load is loaded downward on the loading part 120 and the load is applied downward, the elastic spring 143 is compressed and the rotating shaft 134 is lowered, and the loading part 120 is also lowered.

When the load 120 is lowered as the load is loaded on the loading unit 120, even if the load height of the load increases, the height of the load 120 is lowered, The operator can easily load the load.

The load applied to the loading unit 120 is reduced while the load is lowered in the state that the load is loaded on the loading unit 120 and the rotating shaft 134 is rotated by the elastic restoring force of the elastic spring 143, So that the loading section 120 also gradually rises. Accordingly, even when the load is lowered, the height of the upper load can be maintained at a height sufficient for the operator to carry the load as the load part 120 rises, so that loading work of the load can be performed very easily.

Although an elastic spring 143 is used as the elastic supporting part 140 in this embodiment, an air spring may be used instead. In this embodiment, the body 141 of the elastic supporting part 140 is mounted on the mounting part 120, but the body 141 is installed on the upper surface of the base part 110, And may be formed so as to move the rotary shaft 134 away from the loading unit 120 to move the loading unit 120 up and down.

Figs. 4 and 5 show a second embodiment of the conveyance truck 200. Fig.

The conveyance truck 200 of the present embodiment includes a fixing plate 221 mounted on the upper end of the link connection part 230 and a rotary plate installed on the fixing plate 221 and rotating about the central axis of the center 222).

A thrust bearing 223 is provided on the central axis of the rotating plate 222 to rotatably support the rotating plate 222 with respect to the holding plate 221. The center of the fixed plate 221 A plurality of support rollers 224 spaced in the radial direction and spaced apart from each other in the circumferential direction are provided to support the lower surface of the rotation plate 222. Accordingly, although the fixing plate 221 is fixed, the rotation plate 222 on which the load is mounted rotates, so that the operator can rotate the rotation plate 222 to easily rotate the position of the load.

The base part 210 of the present embodiment is also provided with a conveying wheel 211 and the link connection part 230 has four X-links 231 separated from each other. The link guide part 240 is provided on the upper surface of the base part 210 and on the lower surface of the fixing plate 221. The link guide part 240, And has an inclined guide hole (241).

Four resilient supports 250 are provided to allow the transport truck 200 of the present embodiment to be used to transport or support heavy loads.

6 and 7 illustrate a third embodiment of the transport bogie 300. In Fig.

The transporting carriage 300 of the present embodiment is constructed such that the loading unit 320 is installed on the upper part of the base unit 310 on which the transporting wheels 311 are mounted so as to be vertically movable through the link connecting unit 330, And an elastic supporting portion 340 for elastically supporting the supporting portion 340 upward.

The structure of the base part 310 and the loading part 320, the link connecting part 330, the elastic supporting part 340 and the link guide part (not shown) is the same as that of the first embodiment, .

The transporting carriage 300 of the present embodiment further includes an auxiliary lifting unit 350 for lifting and lowering the base portion 310.

The auxiliary lifting unit 350 includes a auxiliary wheel 351 rotatably mounted on the front and rear of the base 310, an auxiliary actuator 352 for rotating the auxiliary wheel 351, And a main actuator 353 for driving the auxiliary actuator 352.

The main actuator 353 is installed at the rear of the base portion 310 as a hydraulic cylinder used in a conventional hand pallet truck. The main actuator 353 is connected to a manual lever 354 operated by an operator So that the hydraulic pressure can be supplied or the hydraulic pressure can be released.

Although not shown, the auxiliary actuators 352 can receive hydraulic pressure from the main actuator 353 via a hydraulic line. When hydraulic pressure is supplied from the main actuator 353, the cylinder rod is drawn out, (351) is rotated downward. The cylinder main body of the auxiliary actuator 352 is rotatably installed on the base portion 310 so that the connection between the cylinder rod and the auxiliary wheel portion 351 can be maintained well even if the auxiliary wheel portion 351 rotates.

The auxiliary wheel 351 is moved upwards beyond the conveying wheel 311 or the conveying wheel 311 so that the conveying wheel 311 is supported on the ground when the auxiliary wheel 351 is rotated upward, When the auxiliary wheel portion 351 is rotated downward by the driving, the auxiliary wheel portion 351 is supported on the ground, and the base portion 310 is elevated such that the conveying wheel 311 is spaced upward from the ground.

The transporting carriage 300 of the present embodiment can raise the base portion 310 further through the auxiliary lifting unit 350 so that the height of the top portion of the loading portion 320 can be increased as necessary.

8 shows a fourth embodiment of the conveyance truck in which the shape of the loading section 410 is different from that of the preceding embodiment.

The loading unit 410 of the present embodiment is provided with first and second support frames 421 and 422 on the upper portion of a lift plate 411 supported by a link connection portion so as to be vertically movable, And a gas spring 440 is installed on the second support frame 422 so as to be vertically spaced apart from the second support frame 422.

Although the first support frame 421 is formed in a plate shape extending along the upper edge of the lift plate 411 in the present embodiment, Or may be formed in the form of a vertical rod extending upward from both ends of one side of the lift plate 411 so as to be able to support it.

As described above, the rotary tilting plates 430 are vertically spaced from the first support frame 421 so that the load can be sequentially loaded on the rotary tilting plate 430, and the rotary tilting plates 430 One end of the gas spring 440 is connected to the second support frame 422 and the other end of the gas spring 440 is connected to each of the rotary plates 430 so that the load is not seated on the rotary plate 430, And when it does not act, the rotary tilting plate 430 is elastically supported so as to be rotated upward.

The loading unit 410 of this embodiment can load a load first on the upper surface of the lift plate 411 or on the lowermost pivot plate 430 and load the load on the upper pivot plate 430 . In this case, when the load is placed on the rotary tilting plate 430, the gas spring 440 is contracted by the load of the load to extend the upper surface of the rotary plate 430 to a horizontal state, When the load is lowered, the gas spring 440 is extended, and the rotary plate 430 is rotated so as to extend upward so that the load placed on the lower rotary plate 430 can be easily lowered.

Other components except for the loading part 410 of the present embodiment are the same as those of the first embodiment, and therefore, illustration and detailed description of the drawings are omitted.

9 is a fifth embodiment of a conveyance truck that further includes a clamping unit 530 for blocking the elevation or lowering of the loading unit 510. [

The transporting carriage of this embodiment is provided with a clamping part 530 which can block the elevation drive of the loading part 510 so that the loading part 510 does not ascend or descend even if the load is loaded on the loading part 510 or the load is removed, ).

The clamping portion 530 is configured to grip the rod member 520 extending from the base portion on both sides of the rear portion of the loading portion 510 and is connected to the loading portion 510 at one side, And a clamping body 531 formed so as to penetrate the upper and lower surfaces. Both ends of the clamping body 531 are spaced apart from each other by a predetermined distance around the cut-away portion 533. The clamping body 531 When an external force is applied so that the distance between the cut-off portions 533 is reduced, the diameter of the fingertip decreases, and elastic deformation is performed so that the distance between the cut-off portions 533 is reduced.

The clamping body 531 is formed with a bolt coupling hole on both sides of the cutout 533 so as to extend across the cutout 533, and a thread is formed on one side of the bolt coupling hole. A bolt member 535 is coupled to the bolt coupling hole so that a thread formed on one side of the cutout 533 and a bolt member 535 are screwed to each other, The one end of the clamping body 531 in which the thread is formed moves toward or away from the other end so that the gap between the cutouts 533 becomes wider or narrower.

When the gap between the cut-away portions 533 is reduced, the inner diameter of the clamping body 531 is closely contacted with the rod 520 and the pressing force of the clamping body 531 increases to increase the frictional force between the clamping body 531 and the rod 520 So that the loading portion 510 is prevented from ascending or descending along the rod member 520. Conversely, when the bolt member 535 is turned so that the gap between the expansion portions is increased, the diameter of the holding hole increases, so that the frictional force between the clamping body 531 and the rod member 520 becomes small so that the load portion 510 can be lowered or lifted .

A clamping lever 536 is protrudingly formed at one end of the bolt member 535 so that an operator can easily rotate the bolt member 535 with a hand.

Although not shown, a separate friction pad may be further provided on the inner circumferential surface of the clamping body 531 to increase frictional force during the clamping operation with respect to the rod member 520.

The transport bogie according to the present embodiment has a rod guide groove for guiding the rod member 520 of the first embodiment and a clamping portion 530 for engaging with the rod member 520 instead of the guide roller. Since the elements are the same as those in the first embodiment, illustration and detailed description of the drawings are omitted.

10 and 11 are the sixth embodiment of the conveyance truck.

The transport bogie of this embodiment includes a main elastic member 620 in which an elastic supporting portion 610 is supported at the lower end of the loading portion. The main elastic member 620 includes a body 621 installed at the loading part and a drawing member 622 formed at the lower part of the body 621 so as to be pulled in or pulled out from the body 621 along the vertical direction, An elastic spring 623 whose upper end is supported on the upper surface of the body 621 and whose lower end is supported by the drawing member 622 to elastically bias the drawing member 622 in a direction in which the drawing member 622 is pulled out with respect to the body 621, And a shaft connecting member 624 connecting the member 622 and the rotating shaft.

An auxiliary elastic member 630 for supplementing the elastic supporting force of the main elastic member 620 is further provided and the auxiliary elastic member 630 is fixed to the body 621 and extends to the outside of the body 621 by a predetermined length A movable support plate 632 supported by the stationary support plate 631 so as to be spaced apart from the stationary support plate 631 by a predetermined distance from the stationary support plate 631; A rod 635, and a compression spring 636 installed to surround each of the extension rods 635.

The fixed support plate 631 and the movable support plate 632 are formed with through holes through which the extension rod 635 can pass so that the extraction member 622 is inserted into the body 621, The extension rod 635 is allowed to rise through the fixed support plate 631 and the movable support plate 632 when the member 624 rises.

The movable support plate 632 is vertically movable up and down with respect to the body 621 and the pull-out member 622 of the main elastic member 620 at the lower portion of the fixed support plate 631, And is formed so as to maintain a certain distance from the fixed support plate 631.

The screw rod 633 is installed on the movable support plate 632 so that the lower end of the screw rod 633 is rotatably installed to extend toward the fixed support plate 631 to fix the movable support plate 632 to the fixed support plate 631, The screw rod 633 is threaded. The fixed support plate 631 is formed with a screw hole into which the screw rod 633 is screwed so that the screw rod 633 is drawn upward or downward from the fixed support plate 631 as the screw rod 633 rotates, The movable support plate 632 is also vertically movable with respect to the fixed support plate 631 so that the operator can adjust the distance between the movable support plate 632 and the fixed support plate 631. [

The elastic spring 623 of the main elastic member 620 is compressed so that the shaft connecting member 624 connected to the rotational shaft with respect to the loading part and the body 621 is moved upward as the load is loaded on the loading part do. The extension rod 635 and the compression spring 636 provided on the shaft connecting member 624 are lifted together with the shaft connecting member 624. When the fixed support plate 631 and the movable support plate 632 are moved up and down by the body 621, The elastic force of the compression spring 636 is added to the elastic force of the elastic spring 623 while the upper end of the compression spring 636 is in contact with the lower end of the movable support plate 632 so that the elastic supporting force of the elastic supporting part 610 Is increased.

Since the movable support plate 632 can be moved up and down with respect to the fixed support plate 631, when the movable support plate 632 is raised close to the fixed support plate 631, the compression spring 636 comes into contact with the movable support plate 632 The distance between the compression spring 636 and the movable support plate 632 is increased as the movable support plate 632 is spaced apart from the fixed support plate 631. As a result, The elastic supporting force of the compression spring 636 is applied from the beginning when the load is applied.

The other components of the transporting carriage of the present embodiment are the same as those of the first embodiment except for the elastic supporting portion 610, so that the illustration and the detailed description thereof are omitted.

Figs. 12 to 14 show a seventh embodiment of the conveyance truck 700. Fig.

The transporting carriage 700 of the present embodiment is formed such that the lengths of the base portion 710 and the loading portion 720 are relatively longer than those of the preceding embodiment and the loading portion 720 can be moved up and down relative to the base portion 710 And the rotation axis of each link connecting portion 730 is supported by the elastic supporting portion 740. The link supporting portion 730 is supported by the elastic supporting portion 740. [

The length of the linking portion 730 and the length of the base portion 710 are different from each other in the longitudinal direction of the linking portion 720 and the base portion 710. However, The number of formation of the first electrode 730 may be increased to three or more.

The support portion 720 is provided with a support member 723 which extends along the longitudinal direction and protrudes upward to support the load. The support member 723 is provided with a plurality of spaced apart portions along the width direction of the load portion 720 Are provided with extension rails 724. The extension rail 724 is a square profile with an internal hollow.

The transporting carriage 700 of this embodiment further includes a width adjusting unit 750 for adjusting the upper width of the loading unit 720 according to the width of the load.

The width adjusting unit 750 includes a sliding member 751 slidably moving along the extension rail 724 to adjust the width of the stacking unit 720 and an auxiliary guide rod 752 formed to penetrate the sliding member 751, An auxiliary rail 756 for supporting the auxiliary guide rod 755 so as to be able to travel along the width direction to the base 710 and an auxiliary rail 756 for supporting the sliding member 751 in the longitudinal direction And a width adjusting driving unit 760 for moving the driving unit 760.

The sliding member 751 includes a body 752 having a through hole formed therethrough so that the auxiliary guide rod 755 can be vertically passed through the cover 751 and a cover 752 extending from the body 752 toward the extension rail 724. [ 753, and a rack 754 inserted into the hollow of the extension rail 724 from the mother body and having gear teeth at the lower end thereof.

The cover 753 covers the upper surface of the extension rail 724 and the upper portions of both side surfaces thereof and supports the lower end of the load together with the extension rail 724.

The rack 754 is provided with gear teeth at the lower end as described above so that the rack 754 is exposed to the lower portion of the loading plate 721 in the loading plate 721 of the loading unit 720, And the rack 754 can be moved by the width adjusting driving unit 760, which will be described later.

The auxiliary guide rod 755 is disposed at the lower end of the auxiliary guide rod 755 and is movable along the auxiliary rail 756. When the loading unit 720 is moved up and down by the weight of the load, Up and down driving is performed along the auxiliary guide rod 755 up and down.

The width adjustment driving unit 760 includes a rotation bar 761 extending along the longitudinal direction at a lower portion of the loading unit 720 so as to be rotatable, And a handle 763 formed at one end of the rotary bar 761 for rotating the rotary bar 761. The pinion 762 is provided with a plurality of pinions 762 spaced apart from the rack 754 in correspondence with the rack 754 formed in the rotary bar 761,

The pinion 762 meshes with each rack 754 through the exposure hole 722 so that when the rotary rod is rotated through the handle 763, the pinion 762 rotates to rotate the sliding member 754 including the rack 754, The distance between the support member 723 and the sliding member 751 is adjusted by moving the support member 751 along the extension rail 724 to one side or the other side.

The conveyance truck 700 of this embodiment can vary the position of the sliding member 751 according to the size of the load, thereby stably maintaining the load state of the load.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

First Embodiment
100; Trailer
110; Base portion
111; A conveying wheel 112; The rod member
120; The loading section
121; Rod guide groove
130; Link connection
131; X-Link 132; The first link member
133; A second link member 134; Rotating shaft
140; Elastic support
141; Body 142; Out member
143; Elastic spring 144; The shaft connecting member
150; Link guide part
151; Guide hole
Second Embodiment
200; Trailer
210; Base portion
211; Conveying wheel
220; The loading section
221; A fixing plate 222; Spindle
223; Thrust bearings 224; Support roller
230; Link connection
231; Xlink
240; Link guide part
241; Guide hole
250; Elastic support
Third Embodiment
300; Trailer
310; Base portion
311; Conveying wheel
320; The loading section
330; Link connection
340; Elastic support
350; Auxiliary lifting unit
351; Auxiliary wheel portion 352; Auxiliary actuator
353; Main actuator 354; Manual lever
Fourth Embodiment
410; The loading section
411; A steel plate 421; The first support frame
422; A second support frame 430; Pivoting trial
440; Gas spring
Fifth Embodiment
510; The loading section
520; The rod member
530; The clamping portion
531; A clamping body 533; Incision
535; Bolt member 536; Clamping lever
Sixth Embodiment
610; Elastic support
620; The main elastic member
621; Body 622; Out member
623; Elastic spring 624; The shaft connecting member
630; Auxiliary elastic member
631; A fixed support plate 632; The movable support plate
633; Screw rod 635; Extension rod
636; Compression spring
Seventh Embodiment
700; Trailer
710; Base portion
720; The loading section
721; An enemy trial 722; Exposure hole
723; A support member 724; Extension rail
730; Link connection
740; Elastic support
750; Width control unit
751; Sliding member 752; Body
753; A cover portion 754; Rack
755; Auxiliary guide rod 756; Auxiliary rail
760; The width-
761; Rotation bar 762; Pinion
763; handle

Claims (12)

A base portion on which the conveying wheels are mounted;
A loading unit installed on the upper portion of the base unit so as to be vertically movable up and down to load the load;
Wherein the first and second link members, which are provided so that the upper and lower ends are slidable along the longitudinal direction on the loading portion and the base portion, respectively, A link connection portion including an X-link connected to intersect with the X-link;
An elastic support part installed on the base part or the loading part and connected to the rotation shaft to elevate the rotation shaft upward with respect to the base part;
A link that guides the end portions of the first and second link members to travel along a direction inclined by a predetermined angle with respect to the horizontal direction when the end portions of the first and second link members travel along the mount portion and the base portion, And a guiding portion for guiding the conveying passage. The method according to claim 1,
Wherein the link guide portion is formed with a guide hole formed to be inclined upwardly from the front and rear sides of the base portion and the loading portion so as to extend toward the center and to guide the upper and lower ends of the first and second link members, Balance. The method according to claim 1,
Wherein the loading unit includes a fixed plate coupled to an upper end of the link connection unit, and a rotating plate rotatably mounted on the fixed plate and having a load placed on the upper surface thereof. The method of claim 3,
A thrust bearing is provided between the rotary plate and the fixed plate, the upper and lower ends of which are supported by the rotary plate and the fixed plate, respectively, on the central axis so that the rotary plate can be rotatably supported with respect to the fixed plate,
And a plurality of support rollers supported by the fixing plate and having an upper end protruded to an upper portion of the fixing plate to support the rotation plate. The method according to claim 1,
Further comprising an auxiliary elevating unit installed on the base unit and capable of elevating the base unit upward and upward with respect to the supporting surface. 6. The method of claim 5,
The auxiliary lifting unit is rotatably installed on the base portion so as to correspond to the lower end of the conveying wheel of the base portion when the upper portion is rotated upward or to rise above the lower portion of the conveying wheel of the base portion so that the conveying wheel is brought into contact with the supporting surface, A support wheel portion supporting the wheels so as to be spaced upward from the support surface to raise and lower the base portion,
An auxiliary actuator connected to a cylinder rod at one side of the auxiliary wheel unit to rotate the auxiliary wheel unit by drawing and pulling the cylinder rod, the cylinder body being supported by the base unit;
And a main actuator installed on the base unit for supplying hydraulic pressure to the auxiliary actuator through a hydraulic line to draw the cylinder rod, the main actuator having a manual lever for supplying hydraulic pressure. The method according to claim 1,
The loading unit includes a lift plate supported on an upper end of the link connection portion, a first support frame and a second support frame provided on the lift plate, and a second support frame rotatably coupled to the first support frame, And a gas spring which is coupled to each of the rotary plates whose one end is supported by the second support frame and whose other end is vertically spaced apart,
Wherein the gas spring is compressed by a load of the load when the load is loaded on the rotary torsion plate to support the rotary torsion so as to extend along the horizontal direction and is extended when the load is removed to extend the rotary torsion upward and downward So as to be rotatable. The method according to claim 1,
Further comprising a clamping portion for restricting the stacking portion from being raised and lowered along the rod member,
The clamping portion is fixed to the loading portion and has a grip hole through which the rod member passes so that the inner circumferential surface of the clamping portion is in contact with the outer circumferential surface of the rod member. The clamping portion is formed with a vertically extending cut- A clamping body formed so that an inner circumferential surface thereof is in close contact with the rod member or spaced from the rod member,
A bolt member inserted into a bolt coupling hole formed in the clamping body so as to adjust a distance between the cutouts and adjusting a distance between the cutouts in one direction or another direction,
And a clamping lever installed on one side of the bolt member for adjusting the diameter of the gripping hole by rotating the bolt member to adjust the magnitude of the frictional force between the clamping body and the rod member. The method according to claim 1,
The elastic supporting portion includes a main elastic member whose upper end is supported by the loading portion and whose lower end is connected to the rotation axis of the link connecting portion, Respectively,
The main elastic member includes a body supported by the loading portion and having a lower end opened, a drawing member having an inner hollow portion coupled to the body so as to be pulled out or pulled downward, and both ends supported by the body and the drawing member, And a shaft connecting member which is supported by the drawing member and has both ends connected to the rotating shaft of the link connecting portion and connecting the drawing member to the rotating shaft,
Wherein the auxiliary elastic member includes a fixed support plate fixed to the body, a movable support plate vertically movably installed at a lower portion of the fixed support plate, a screw rod extended from the shaft connection member to penetrate the movable support plate, And a compression spring which is installed to surround the rod and whose lower end is supported by the shaft connecting member and whose upper end contacts the movable support plate when the drawing member is drawn into the body. 10. The method of claim 9,
Wherein the auxiliary elastic member includes a screw rod extending from the movable support plate toward the fixed support plate and passing through the fixed support plate and having threads formed on the outer peripheral surface thereof for connecting the movable support plate to the fixed support plate so that the movable distance can be adjusted, Wherein the screw rod is rotatably supported on the movable support plate and the screw rod is formed in the inner peripheral surface of the fixed support plate so as to correspond to the screw rod of the screw rod, Wherein the screw rod is vertically moved up and down with respect to the fixed support plate so that the movable support plate is vertically moved up and down to adjust a distance between the movable support plate and the fixed support plate. The method according to claim 1,
Wherein the stacking unit includes a stacking plate supported on an upper portion of the link connection portion, and a plurality of extension rails extending along the width direction and spaced apart from each other in the longitudinal direction on the upper surface of the stacking plate,
And a sliding member installed on one side of the extension rail and extending or contracting the loading area of the loading unit while moving along the extension rail. 12. The method of claim 11,
Wherein the width adjusting unit includes an auxiliary rail extending in a direction corresponding to an extending direction of the extension rail at a position corresponding to the extension rail in the base portion and an auxiliary guide rod extending downward from the auxiliary rail, And a width adjusting driving unit for moving the sliding member along the extension direction of the extension rail,
The sliding member includes a body having a through hole penetrating vertically through which the auxiliary guide rod is inserted, a cover portion extending from the body to cover the upper surface of the extension rail and supporting a lower end of the load, And a rack formed on the rail so as to be inserted into the hollow and having gear teeth formed on the lower surface thereof,
The width adjusting driving unit may include a rotary bar extending in the longitudinal direction at a lower portion of the redistribution plate and rotatably installed, a pinion installed on the rotary bar and engaged with the rack through an exposure hole formed in the red plate, And a handle installed on one side of the handle for rotating the rotary bar.

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