KR100323803B1 - Movable work table - Google Patents

Abstract

PURPOSE: A movable work table is provided to easily move such a heavy object as a transmission or an engine to a desired place and to adjust the stance balance of a load. CONSTITUTION: A base panel(12) has plural legs(16) attached with casters. A mounting table(60) having a rack(50) extending by a specific length supports a heavy-weighted object. A support(20) has a lift cylinder making the rack inserted to the end portion of a housing extending from the center of the base panel. The height of the mounting table is adjusted by a height adjusting unit moving the rack upward and downward.

Description

Mobile worktable

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile workbench, and to a mobile workbench for easily moving a heavy object such as a transmission or an engine to a desired place at a place such as an automobile repair shop, and to balance the posture of a payload with a simple adjustment.

For example, there are many cases in which heavy assemblies such as transmissions and engines are removed and combined, and if necessary, moved to a separate place for maintenance or repair work. Therefore, a workplace that handles heavy objects frequently is equipped with a short distance transfer equipment that can conveniently and safely move heavy payloads.

A typical example is a hoist. The hoist is a combination of an electric motor and a chain block. It is only a transport device for payload and cannot be moved or supported at a suitable height to make the payload convenient. Therefore, there was a need for a platform that can be safely mounted and moved so that the payload does not move.

Some worktables are equipped with lifting mechanisms that can be mounted to a height that is easy to work and can be lowered to the ground after the work is finished. Examples of such lifting mechanisms are a hydraulic cylinder type and a pneumatic cylinder type. The hydraulic lifting or pneumatic cylinder lifting device has a problem that it is difficult to raise or lower the payload and adjust the mounting angle of the payload.

In addition, when moving the work platform containing the payload, the movement path is not easy to move in the cramped place, the load is unstable in the process of stopping and moving, the damage or the probability of safety accidents.

On the other hand, the tool support workbench of JP-A-89-10374 has a screw rod attached to the bottom of the rail support plate to support the clamper on which the payload can be moved within a limited distance. It is supposed to raise and lower, but it is unreasonable to rotate the ring screw with only one arm's force while the payload is loaded.

In addition, it is inconvenient to turn the entire work platform to change only the orientation of the payload. Moreover, the workbench is very inconvenient when going through narrow spaces, since the wheeled base plate is a bulky one-piece.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile worktable that provides stability of a payload and convenience of work by precise height adjustment of a pedestal, and which can be easily moved even in a narrow passage.

In the present invention, the configuration to provide the convenience of the movement of the workbench in a narrow passage is to fold the legs attached to the base plate by folding the caster attached legs to narrow or widen the legs according to the width of the passage It can be achieved by combining.

In addition, the height adjustment of the rack on which the payload is placed can be installed to the rack to support the rack so that the rack can be lifted and lowered by the pinion by manipulating only one of the handles installed on the support. By means of height adjustment means.

In addition, in order to adjust the cradle at an angle that is easy to work, it is installed so that the support can be freely rotated on the base plate, the stopper ball disposed on the rotating disk attached to the bottom of the support, and on the upper plate of the upper base plate of the rotating disk This is achieved by selectively matching the installed stopper and the stopper hole by fitting the stopper into the hole of the rotating disk.

1 is a perspective view of a movable workbench according to an embodiment of the present invention,

Figure 2 is an exploded perspective view of the holder of the mobile workbench of the present invention,

3 is a cross-sectional view of the rack height adjustment means of the present invention,

Figure 4 is a partial cross-sectional view showing the rack lifting means in the support of the mobile workbench according to the present invention,

Figure 5a is a bottom view of the legs folded state of the mobile workbench according to the present invention,

Figure 5b is a bottom view of the legs of the mobile worktable unfolded in accordance with the present invention,

Figure 6 is a state seated on the mount of the mobile workbench according to the present invention,

7 is an operating state of the cradle of the present invention,

8 is an exploded perspective view of the holder for a mobile workbench according to another embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

10: moving means 12: base plate

14: rotating disk 13, 15: water topper ball

16: leg 17: casters

18: Link 19: Stopper

20: support 22: cap

24: roller 26: chain

30: height adjusting means 40: lifting cylinder

50: rack 60: holder

310: first handle 315: rotating body

317: first spline shaft 320: ratchet gear

330: stop plate 323: Fool

340: second spline shaft 345: second handle

610: lid 620: rocking plate

624: angle adjusting screw 630: stand

640: fine adjustment device 650: box

Next, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7.

In FIG. 1, the movable work platform includes a moving means 10 including a base plate 12 to which a plurality of casters 17 are attached to move the work table, and a support 20 installed at the center of the upper surface of the moving means 10. The rack 50 is slidably coupled to the lifting cylinder 40 attached to the end of the support 20 and vertically movable to the rack 50 and the cradle coupled to the end of the rack 50 and supported by the rack 50. It consists of 60.

A cap 22 is placed on the upper end of the support 20 to prevent foreign substances such as dust from entering, and a tool box 21 is provided on the outer circumferential surface of the support 20 for storing various work tools and parts.

The moving means 10 is installed in the center of the bottom surface of the base plate 12, the rotary disk 14, and attached to the support 20 in the center of the upper surface of the rotating disk 14 so as to rise above the base plate 12 Where the circumference of the base plate 12 is divided into pieces, the bracket is attached to the inner end of the folding leg 16 with a pin, and the casters 17 are attached to the bottom of the outer end of all the legs 16. These foldable legs 16 are connected to the folding side and the rotating disk 14 by the link 18 so that the same maximum angle can be unfolded without doing anything.

The base plate 12 is provided with an endless rotation prevention stopper 19 of the rotating disk 14, and a plurality of stopper holes 15 into which the stopper 19 is fitted are provided on the rotating disk 14 in a radial manner. .

In FIG. 2, the holder 60 includes a lid 610 and a box 650, and a rocking plate 620 and a plurality of pedestals 630 are built in the box 650. Guide slots 614 are drilled in all directions, and one boss 615 is attached to the bottom center. The swinging plate 620 is installed in parallel to the bottom of the lid 610, and the boss hole 621 to be fitted to the boss 615 is provided in the abdomen. The pedestal 630 is composed of a support part 631 supporting the rocking plate 620 and a protruding piece 632 of one phase integrally formed at both ends of the support part 631.

In addition, the fine adjustment device 640 is provided on both side walls of the rocking plate 620 in order to raise and lower the protruding piece 632 of the pedestal 630 through the guide slot 614. In addition, the box 650 accommodates a rocking plate 620, a pedestal 630, and a fine adjustment device 640. The tip of the bolt 618 embedded in the screw hole 617 drilled on the outer surface of the boss 615 is fastened to the upper end of the rack 50 to fix the connection state with the cradle 60.

The upper surface of the swinging plate 620 is attached to both sides of the bottom surface of the lid 610, the handle 622 corresponding to the attached handle 616 is attached. The oscillating plate 620 is placed under the lid 610, and the pin 625 is driven by connecting the center of the pin hole of the dowel 616 and the corresponding dowel 622.

A leveling device for adjusting the height of the protruding piece 632 of the pedestal 630 is installed in the support 60. The leveling device is installed on one side of the box 650 and the angle adjustment screw 624 hinged to the handle 623 formed on one side wall of the swinging plate 620, such as the longitudinal direction of the guide slot 614 The female screw 645 is fastened to the angle adjusting screw part 624. When the female screw unit 645 is rotated, the oscillating plate 620 may perform a seesaw movement around the pin 625 connecting the handle 616 and the corresponding handle 622.

A shaft hole 633 to which the hinge shaft 635 is fitted is drilled in each protruding piece 632, and the hinge shaft 635 has a pair of lugs 634 and the shaft hole formed on both sides of an upper surface of the swing plate 620. The pedestal 630 is pivotally supported by the swinging plate 620 by penetrating through 633.

In addition, each fine adjustment device 640 is rotatably coupled to the adjustment unit 642, the male thread 641 of the cylindrical female screw portion (643) fixed to the swing plate 620 to support the male screw 641 formed integrally with the adjustment unit Connecting the first hinge part 644, the second hinge part 645 and the first and second hinge parts 644 and 645 which are hinged to be rotatably coupled to the hinge shaft 637 protruding from the pedestal 630. It consists of a connector 646.

The box 650 has openings 651 formed on both side walls for accommodating the fine adjustment device 640, and female screws 645 coupled to the fine adjustment screws 24 are installed at the bottom, and the bolt B is fixed to the bottom of the lid 610 by a fixing means not shown in the same manner as welding.

In FIG. 3, the height adjusting means 30 accommodated in the gearbox 360 includes a first handle 310 rotated by a work means and an outer circumferential surface to which the rack gear 316 is fastened and the first handle 310. ) Is provided with a tapered rotary body 315 and a first spline shaft 317 that is fixed by a nut 312 through the center of the rotary body 315.

A ratchet gear 320 is installed on the first spline shaft 317 adjacent to the rotor 315 to prevent the rotor 315 from rotating in the reverse direction, and a stopper plate 330 is mounted on the ratchet. In order to limit the axial movement of the gear 320 is provided on the first spline shaft 317 to be in contact with the ratchet gear 320. In addition, the first spacer 325 is provided coaxially between the rotating body 315 and the ratchet gear 320, the second spacer 335 is coaxial between the stop plate 330 and the ratchet gear 320. It is installed on the top. The pinion 318 of the first spline shaft 317 is installed to engage the rack 50.

In order to prevent the reverse rotation of the ratchet gear 320, the pole 323 is installed in the lower portion of the height adjusting means 30, that is, the gear box 360, and the pole 323 is deflected upward in the pole 323. The spring 324 for making it is provided.

On the other hand, the pinion (341) engaged with the cylindrical gear 316 of the rotating body 315 to raise the rack 50 by applying a force less than the force applied by the operator to rotate the first handle (310). The second spline shaft 340 having a) and a second handle 345 coupled to the other end of the second spline shaft 340 are provided in the height adjusting means 30.

4 shows an element of the lifting means of the movable work platform, which is composed of a rack 50, a lifting cylinder 40, a chain 26, and a plurality of rollers 24. The lifting cylinder 40 is slidably installed vertically in the support 20, and the rack 50 is installed in the lifting cylinder 40 so as to be movable vertically. The cap 22 is provided with a plurality of fixing parts 23 for fixing the chain 26, and a plurality of rollers 24 for guiding the chain 26 at the lower end of the lifting cylinder 40. ) Is installed. The chain 26 extending downward from the fixing portion 23 is fixed to the lower portion of the rack 50 via the roller 24.

The working platform of the present invention configured as described above is as follows.

First, before the work is performed, the legs 16 mounted on the moving means 10 of the movable work table are unfolded at a predetermined angle and fixed so as not to rotate arbitrarily. 5A illustrates a case where the legs of the mobile workbench are folded, and FIG. 5B is a bottom view illustrating a state where the legs of the mobile workbench of the present invention are unfolded. As shown in the drawing, when the legs 16 are folded, when the rotating disk 14 is rotated counterclockwise, a link 18 connected to the rotating disk 14 causes the legs 16 to be attached to the base. The plate 12 is developed outward in the centrifugal direction.

At this time, after matching the holes of the stopper hole 15 selected from the plurality of stopper holes 15 formed in the rotating disk 14 and the stopper hole 13 formed in the base plate 12, the stopper 19 is moved. The stopper holes 13 and 15 are inserted into the rotating disk 14 to prevent unauthorized rotation. Thus, the rotating disk 14 cannot move.

If the path on the movement path is narrow when the payload is loaded on the movable work station where the deployed leg 16 is fixed, the stopper 19 is pulled out and rotated as opposed to when the rotating disk 14 is deployed. Pinch to lock and move.

In FIG. 6, the operator manipulates the height adjusting means 30 to raise the work bench to support the payload 80, such as a transmission, on the cradle 60. That is, when the first handle 310 of the height adjustment means 30 is rotated in the clockwise direction, the rotating body 315 is rotated in the same direction. When the rotor 315 rotates clockwise, the rotor 315 compresses the first spacer 325, the ratchet gear 320, and the second spacer 335 toward the stop plate 330. Is rotated. In this case, since the ratchet gear 320 is not engaged with the fool 323, the ratchet gear 320 may rotate in one direction together with the rotor 315.

Moreover, the 1st spline shaft 317 attached to the said rotating body 315 by the nut 312 also rotates clockwise. Thus, the rack 50 meshing with the pinion 318 of the first spline shaft 317 rises up. As the rack 50 is raised, the chain 26 fixed to the bottom of the rack 50 follows. At this time, the lifting cylinder 40 on which the roller 24 is mounted also rises vertically upward.

When the handle operation is stopped, the rack 50 is loaded downward by the load of the payload 80, so that the ratchet gear 320 is rotated counterclockwise by the pinion 318. do. However, the ratchet gear 320 is supported by the pool 323 so as not to rotate in a counterclockwise direction so that the payload 80 remains at a predetermined height. When the payload 80 is lowered in the stationary state as described above, when the first handle 310 is rotated counterclockwise, the rotor 315 also rotates counterclockwise. In this case, since the ratchet gear 320 is engaged with the fool 323, the rotor 315 is rotated by a minute spacing with the nut 312 to move in the axial direction, whereby the first spacer 325 and the The second spacer 335 is finely spaced apart from the ratchet gear 320.

Accordingly, the ratchet gear 320 is engaged with the pawl 323 and does not rotate, and the rotor 315 and the stop plate 330 rotate together with the first spline shaft 317 in the counterclockwise direction. As the first spline shaft 317 rotates counterclockwise, the rack 50 engaged with the pinion 318 of the first spline shaft 317 descends downward.

As the rack 50 descends downward, the chain 26 fixed at the bottom thereof also descends, and the lifting cylinder 40 equipped with the roller 24 for guiding the chain 26 also vertically descends downward. .

When the handle 60 is placed in the handle 60 when the worker is in a desired position during the lowering as described above, the rack 50 is loaded by the load of the heavy payload 80 and engaged with the rack 50. A rotational force is applied to the pinion 318. Therefore, the stop plate 330 integrally mounted to the shaft 317 through the excessive rotational force of the first spline shaft 317 is in close contact with the spaced first spacer 325 and the second spacer 335. . Then, the rotating body 315, the first spacer 325, the ratchet gear 320, the second spacer 335, and the stop plate 330 are in close contact with each other to operate together, the ratchet gear 320 is The rack 50 is also not lowered because it is engaged with the pawl 323 and does not rotate.

In some cases, the height adjusting means 30 may be driven by rotating the second handle 345. Since the diameter of the pinion 341 of the second spline shaft 340 mounted on the second handle 345 is smaller than the diameter of the cylindrical gear 316 of the rotating body 315, the second handle 345 has a diameter. The force applied is less than the force applied to the first handle 310. When the second handle 345 is rotated, the pinion 341 of the second spline shaft 340 rotates in the same direction, and the cylindrical gear 316 meshed with the pinion 341 rotates. Accordingly, the rotating body 315 coupled to the cylindrical gear 316 rotates to allow the rack 50 to be vertically moved.

In FIG. 7, after the protrusion 632 of the pedestal 630 is properly protruded to the outside of the lid 610 by the fine adjustment device 640, the payload 80 is placed on the holder 60. Settle down. In order to balance the left and right of the payload 80 in a state where the payload 80 is seated, the adjusting unit 642 of the fine adjusting device 640 is rotated clockwise. The male screw portion 641 rotates clockwise by the adjusting portion 642, and the first hinge portion 644 moves toward the female screw portion 643.

Accordingly, the connecting part 646 connected to the first hinge part 644 pulls the second hinge part 645 so that the support part 631 of the pedestal 630 rotates about the hinge axis 635. The protrusion piece 632 parallel to the swing plate 620 and integrally formed in the support part 631 protrudes out of the lid 610 through the guide slot 614.

On the other hand, when the fine adjustment device 640 is rotated in the counterclockwise direction, the protrusion piece 632 is lowered to the inside of the lid 610 by operating in the opposite operation to the above-mentioned operation. In addition, by rotating the female screw 645 installed in the box 650 to balance the front and rear of the mounted payload 80, the angle adjusting screw portion 624 hinged to one side of the swing plate 620 is raised. Or descend. At this time, by the operation of the angle adjusting screw unit 624, the oscillating plate 620 performs a seesaw movement around the combination of the first protrusion 616, the second protrusion 622, and the pin 625. By varying the height of the protruding pieces 632 of the pedestal 630 by the seesaw movement of the swinging plate 620, the front and rear balance of the payload is achieved.

Next, a second embodiment of the present invention will be described.

In FIG. 8, the mounting portion 80 of the movable work platform according to the second embodiment includes a lid 82 having a plurality of guide slots 83 and a cylindrical boss 81, and the lid 82 through the guide slots 83. ) Is composed of two pedestals 85 which can be raised or lowered to the outside, and a case 84 fixed to the bottom of the lid 82 by fastening means (not shown).

The leveling device for balancing the front and rear of the weight 80 seated on the mounting portion 80 of the case 84 is coupled with the angle adjusting tool 86 and the angle adjusting tool 86 penetrating one side of the lid 82. It consists of a female threaded portion 90 provided on the bottom.

In addition, each pedestal 85 is hinged to the lid 82 by a hinge shaft 89 passing through a plurality of protrusions 91 formed on the bottom surface of the lid 82. The supporting section 87 is rotatably fixed to one side of the cylindrical boss 81 by a bolt 92, and the other end supports the bottom surface of the pedestal 85. The other end of the support section 87 is supported by an end portion of the elevating adjustment tool 88 that extends from the bottom surface of the case 84.

When the elevating adjustment mechanism 88 is rotated to raise the pedestal 85 of the mounting portion 80, the support adjustment 87 pushes the pedestal 85 upward while the elevating adjustment mechanism 88 is raised. The pedestal 85 is raised about the hinge shaft 89. When the elevating adjustment mechanism 88 is rotated in the reverse direction, the pedestal 85 is lowered under the lid 82.

In addition, by rotating the female threaded portion 90 coupled to the angle adjuster 86, the angle adjuster 86 is raised or lowered to change the front and rear height of the payload 80 to balance the payload 80. have.

In this way, by adjusting the height of the cradle can be placed on the mounting work.

The mobile worktable according to the present invention can stably support a payload that is difficult to handle by a cradle or a pedestal, and stably support the payload with a fine adjustment of the pedestal in a state in which the payload is settled, and adjust the position more accurately. We can do convenient work.

In addition, the bridge can be widened or narrowed according to the situation, it is convenient to pass narrow and very convenient for moving heavy objects.

Claims (7)

A base plate 12 having a stopper hole 13 into which the stopper 19 is inserted, and a plurality of stopper holes 15 rotatably installed on the bottom surface of the base plate 12 and to which the stopper is selectively fastened. Rotating disk 14 and the base plate 12, the end of one side is rotatably coupled to one end of the link 18 is coupled to the rotating disk 14 and the other end is folded at the same time The other end includes a plurality of legs 16 to which casters are attached; A cradle 60 having a rack 50 extending to a predetermined length on a bottom thereof and supporting a heavy object; A support 20 having a lifting cylinder 40 for guiding the rack 50 to be inserted and slide at an end of the housing extending upward at a predetermined height in a central portion of the base plate 12; In order to move the rack 50 up and down to adjust the height of the holder 60 and to fix its position, one end is fixed to the upper inside of the housing of the support 20, the other end is the rack A chain 26 coupled to an end portion of the 50 and a roller 240 for guiding the chain 26 at the lower end of the elevating cylinder 40 are installed at the predetermined position of the elevating cylinder 40. A first pinion gear 318 engaged with the rack 50 and rotatably coupling the first handle 310 having the cylindrical gear 316, the latch gear 320, and the stop plate 330; The second handle 345 having a second pinion gear (341) meshing with the cylindrical gear 316 is rotatably coupled, the ratchet gear (rotational direction of the ratchet gear 320 is rotated in one direction) Install a pawl 323 engaged with the 320, the spring 324 for biasing the pawl 323 upwards Movable work surface, characterized in that the gearbox consisting of a box 360 for. According to claim 1, wherein the cradle (60) comprises a lid (610) formed with a plurality of guide slots (614), cylindrical boss (615), and a plurality of first pieces (616); Oscillation in which a plurality of second protrusions 622 communicating with the plurality of first protrusions 616, two pairs of lugs 634, and a central hole 621 through which the cylindrical boss 615 penetrates are formed on an upper surface thereof. Plate 620; The hinge 631 is hinged to the oscillation plate 620 by a support 631 supporting the lower surface of the oscillation plate 620 and a hinge shaft 635 integrally formed with the support portion and passing through the pair of lugs 634. A pair of pedestals 630 having two protruding pieces 632 coupled thereto; Fine adjustment device (640) for adjusting the vertical width of each pedestal (630); A leveling device installed at one side of the rocking plate 620 to adjust the angle of the rocking plate 620 with respect to the lid 610; and Removable work desk, characterized in that it comprises a box (650) mounted on the bottom of the lid (610). The method of claim 2, wherein the fine adjustment device 640 is supported by the elevating adjustment unit 642 of the pedestal 630, the male screw 641 and the male screw 641 integrally formed in the adjustment unit 642 is penetrated and supported The first hinge portion 644, the pedestal 630, and the pedestal, to which the female screw 643 extended to the swing plate 620 and the male screw 641 penetrating the female screw 643 are rotatably coupled. And a second hinge portion 645 hinged to the support portion 631 of 630, and a connecting portion 646 connecting the first hinge portion 644 to the second hinge portion 645. Mobile worktable. The method of claim 2, wherein the leveling device includes an angle adjusting screw portion 624 is hinged rotatably fixed to one side of the bottom surface of the swinging plate 620 and a female screw 645 installed on one side of the box 650. Removable work bench, characterized in that. The rotating body 315, the first spacer 325, the ratchet gear 320, the second spacer 335, and the stop plate 330 when lifting the rack through the first handle. ) Is integrally coupled, the movable worktable, which is spaced apart from each other when the rack 50 is lowered. According to claim 1, wherein the cradle 60 is provided with a plurality of guide slots 83, the protrusion 91 formed adjacent to each of the guide slots 83, the cylindrical boss 81 formed a hole in the outer peripheral surface Lid 82; Two pedestals (85) capable of raising and lowering through the guide slot (83); A hinge shaft 89 which pivotally couples the pedestals 85 to the protrusions 91 of the lid 82; One end portion is fixed to the hole of the cylindrical boss 81 by a bolt 92, the other end support 87 for supporting the bottom surface of the pedestal 85; A case 84 mounted on the bottom of the lid 82; A leveling device having an angle adjusting tool (86) extending from the lid (82) to the case (84) and a female screw portion (90) screwed to the angle adjusting tool (86) and installed in the case (84); And And a lifting adjustment tool (88) extending from the case (84) to the bottom of the support rod (87) to support the support rod (87). The movable work bench according to claim 1, wherein a tool box (21) is provided on an outer circumferential surface of the support (20).