JP2010083467A - Movable working platform - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable working platform capable of traveling in any direction of at least, the front, rear, right, or left in the self-traveling movable working platform having driving wheels. <P>SOLUTION: This movable working platform has a working platform body 2, a universal wheel 4 arranged so as to capable of supporting the working platform body 2 and at least a pair of driving wheels 5A and 5B arranged so as to be mutually dependently drivable, and has a pedestal 28 for rotatably arranging the driving wheels 5A and 5B on the working platform body 2, a first engaging recessed part 30 and a second engaging recessed part 31 arranged at a 90-degree interval on the outer periphery of the pedestal 28, a pin member 32 engagably arranged in these parts. and an operation lever 35 for operating the pin member 32, so that travel in the straightly horizontal direction can be performed by independently changing the direction of the driving wheels 5A and 5B from the working platform body 2 in addition to an advance, a retreat, a direction change in the lateral direction and also turning on the spot. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a movable workbench provided with wheels.

2. Description of the Related Art Conventionally, there is a type in which a movable workbench is provided with a drive wheel in order to move the base of a movable workbench that is heavy, and the movable workbench is self-propelled. (Patent Document 1)
Thus, by making the movable worktable self-propelled, the burden of moving the movable worktable, which is a heavy object, has been reduced.
JP 2004-299851 A

  However, in the conventional self-propelled movable workbench, the driving wheel is fixed with respect to the base. For example, in order to change the direction of the movable workbench by 90 degrees, run the vehicle while cutting the curve in the left-right direction. It was necessary to change the direction, and this always had to take into account the radius of rotation of the movable workbench, and there was a problem in handling when the traveling space was limited.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a movable workbench capable of traveling in at least one of the front, rear, left and right directions in a self-propelled movable workbench provided with driving wheels.

  The present invention according to claim 1 is a movable workbench comprising a workbench main body and a plurality of wheels provided on the workbench main body, wherein the plurality of wheels can support the workbench main body. A wheel angle setting means that includes an arranged free wheel and at least a pair of drive wheels provided so as to be capable of being driven independently from each other, and wheel angle setting means that allows the drive wheel to be set to an arbitrary angle. The means comprises: a pedestal provided with the drive wheel rotatably on the worktable body; a fixing means provided so as to be able to hold the pedestal at every predetermined rotation angle; and a fixing operation means for operating the fixing means. It is characterized by having.

  According to a second aspect of the present invention, the fixing means is configured such that the predetermined rotation angle is approximately 90 degrees, and an engagement receiving portion provided on the pedestal for each predetermined rotation angle and engageable with the engagement receiving portion. And an engaging portion provided on the head.

  The present invention described in claim 3 is characterized in that it is provided in at least three corners of the work table.

  According to a fourth aspect of the present invention, the universal wheel and the drive wheel are provided on a shaft portion provided in the work table main body so as to be relatively movable.

  According to a fifth aspect of the present invention, there is provided a connecting body in which the universal wheel is connected to one side and the driving wheel is connected to the other side, and the connecting body is a shaft that can swing freely in a seesaw in a direction perpendicular to the shaft portion. It is characterized by being supported.

  According to the first aspect of the present invention, in addition to forward movement, backward movement, left-right direction change, and turn on the spot by the free wheel and the pair of drive wheels, the drive wheel is changed direction independently from the work table body. This makes it possible to travel in the lateral direction.

  According to the second aspect of the present invention, it is possible to simplify the configuration in which the driving wheel can be changed in direction independently from the work table main body.

  According to the invention of claim 3, the work safety and the running stability of the movable work table can be improved by further stabilizing the support of the work table body by the free wheel.

  According to the invention of claim 4, by causing the free wheel and the drive wheel to move relative to each other, it is possible to prevent idling of the drive wheel due to the undulation of the traveling surface and to reduce the impact when the posture of the movable workbench changes. it can.

  According to the invention of claim 5, the free wheel and the drive wheel connected to the connecting body are rocked by the seesaw so that the drive wheel is prevented from idling due to the undulation of the traveling surface with a simple structure, and the movable work table. Impact at the time of posture change can be reduced.

  Hereinafter, a first embodiment of the movable worktable of the present invention will be described with reference to FIGS. The movable workbench of the present embodiment has a workbench main body 2 having a planar rectangle and a base 3 provided at the lower part of the workbench main body 2. The base 3 has a frame-like shape with a rectangular plane.

  Further, the base 3 has free wheels 4, 4, 4, 4 as non-drive wheels provided at the lower four corners of the base 3, and drive wheels 5A, 5B provided at a substantially central portion of the base 3. ing.

  As shown in FIGS. 4 to 7, the universal wheel 4 includes a substantially disk-shaped rotation support 7 that is rotatably provided around the main shaft 6, and a wheel provided in parallel with the rotation support 7. A first wheel unit 8 and a second wheel unit 9 are provided as constituent bodies.

  The first wheel unit 8 and the second wheel unit 9 are respectively provided with barrel-shaped rollers 10 as a plurality of rotating bodies each provided with a rotating shaft in a direction orthogonal to the rotating direction around the main shaft 6 of the rotating support 7. I have.

  The barrel roller 10 is formed at a predetermined arc rate so that an arc equally divided in the direction of the outer periphery L of the free wheel 4 becomes a meridian M. And the meridian M of each barrel-shaped roller 10 is equally arrange | positioned in the circumferential direction so that the outer periphery of the universal wheel 4 may be formed, and in this Example, the 1st wheel unit 8 and the 2nd wheel unit 9 are arranged. Each have four barrel rollers 10 arranged at a constant pitch on the outer periphery of the rotary support 7.

  In the first wheel unit 8 and the second wheel unit 9, the discontinuous portion of the outer periphery L between the barrel type rollers 10 of one wheel unit 8, 9 is changed to the barrel type roller 10 of the other wheel unit 8,9. In order to complement each other, the barrel rollers 10 of the first wheel unit 8 and the second wheel unit 9 are alternately arranged. In the present embodiment, the first wheel unit 8 and the second wheel are arranged. The barrel roller 10 provided in the unit 9 is disposed in a positional relationship with respect to the outer peripheral portion of the rotary support 7 with the mounting positions shifted from each other by a half pitch.

  The barrel-shaped roller 10 is a dual material in which a barrel-shaped elastic body 12 is attached to the outer periphery of a hollow cylindrical core 11 made of steel, aluminum alloy, magnesium alloy, reinforced plastic or the like as a material having high rigidity. It has a structure. As the elastic body 12, various rubbers such as urethane rubber, butadiene rubber and natural rubber having shock absorption are used. Further, first bearings 13 are fitted to inner peripheral portions at both ends in the longitudinal direction of the core material 11. The barrel-shaped roller 10 is connected to a rotary shaft 15 that is installed perpendicularly to the main shaft 6 between a plurality of substantially L-shaped support portions 14 that project in the direction of the main shaft 6 on the outer peripheral portion of the rotary support 7. 1 is supported rotatably via a bearing 13.

  The universal wheel 4 having the above-described configuration is formed by suspending a main shaft 6 provided via a second bearing 17 on a boss 16 provided on a rotary support 7 from an upper plate 18 and both ends of the upper plate 18. Side-mounted substantially fixed U-shaped wheel fixing portion 21 with side plates 19 and 20 is supported in a state of being spanned between side plates 19 and 20, and is further based on upper plate 18 of wheel fixing portion 21. 3 is connected to the lower four corners. The universal wheels 4 arranged at the four corners of the base 3 are provided so as to be able to support the loads on the worktable body 2 and the base 3, so long as the loads on the worktable body 2 and the base 3 can be supported. The installation location and the number of the universal wheels 4 are not limited.

  The drive wheels 5A and 5B are motor-driven, and are driven by a motor 23 provided on the drive wheel 5A and 5B mounting frame 22.

  The motor 23 is connected to the drive wheels 5A and 5B via travel switching means 24 and 25 provided on the front wheel mounting frame 49. The travel switching means 24 and 25 are operated as switching operation means. The levers 26 and 27 are provided. The operation levers 26 and 27 are rotatably provided in the horizontal direction. As shown in FIG. 6, the tips of the operation levers 26 and 27 are advanced in the traveling direction of the drive wheels 5A and 5B. That is, by directing the drive wheels 5A and 5B in the direction orthogonal to the axle direction, the driving force of the motor 23 can be transmitted to the drive wheels 5A and 5B, and the tips of the operation levers 26 and 27 are set in the traveling direction of the drive wheels 5A and 5B. The driving force transmitted from the motor 23 to the driving wheels 5A and 5B is cut off by directing in the orthogonal direction, that is, the axle direction of the driving wheels 5A and 5B.

  The drive wheels 5A and 5B can be driven independently, and the drive wheels 5A and 5B can be driven independently to change the direction during travel.

  Here, the drive wheel mounting frame 22 is fixed to a pedestal 28 formed in a circular shape. The pedestal 28 is supported by a pedestal mounting frame 29 provided so as to be swingable in a vertical direction by a first shaft portion 29A provided at a substantially central portion of the base 3 so as to be rotatable in a horizontal direction by a rotary shaft 29B. ing. Here, when a vertical load from the work table main body 2 and the base 3 acts on the drive wheels 5A and 5B, the pedestal mounting frame 29 is displaced upward in the vertical direction relative to the base 3 to drive the drive wheels 5A. , 5B can be avoided. Therefore, the drive wheels 5 </ b> A and 5 </ b> B are rotatably provided regardless of the vertical load from the worktable body 2 and the base 3.

  On the outer periphery of the pedestal 28, there is a first engagement recess 30 formed in a groove shape parallel to the axle direction of the drive wheels 5A, 5B, and an interval of 90 degrees from the first engagement recess 30. And a second engagement recess 31 formed in a groove shape so as to be orthogonal to the axle direction of the drive wheels 5A and 5B.

  The pedestal mounting frame 29 has a cylindrical pin holding member that slidably holds a pin member 32 engageable with the first engagement recess 30 and the second engagement recess 31. There are 33. The pin member 32 is configured to be freely inserted and removed by an operation lever 35 as a fixing operation means provided in the worktable body 2 via a wire member 34 connected to one end of the pin member 32.

  Further, on the upper surface of the pedestal 28, the pedestal 28 rotates at a rotation angle of 90 degrees or more through a position where the pin member 32 faces the first engaging recess 30 or a position facing the second engaging recess 31. The first rotation restricting member and the second rotation restricting means (both not shown) are provided so as to be able to come into contact with the pedestal mounting frame 29, respectively. The rotation angle in the horizontal direction from the position where the pin member 32 faces the first engagement recess 30 to the position where the pin member 32 faces the second engagement recess 31 is restricted to 90 degrees.

  The workbench main body 2 is provided with a safety fence 39 for preventing the fall at the peripheral edge of the bottom plate 38. The safety fence 39 controls the operation of the hydraulic cylinder 8 to raise the workbench main body 2. Or the raising / lowering switching means 12 which can switch down operation | movement is arrange | positioned so that attachment or detachment is possible (refer FIG. 2). The worktable body 2 is provided with a travel control device 40. The travel control device 40 has a travel stop button as a travel stop means capable of switching the travel of the movable worktable 1 or canceling the travel stop. 41, a traveling speed changeover switch 42 serving as a traveling speed switching means capable of switching the traveling speed of the movable workbench 1 to, for example, low speed traveling and high speed traveling, and a pair of drive wheels 5A and 5B can be controlled independently of each other. , A pair of travel operation means 43, 44, a travel enable display lamp 45 that is a travel enable display means that indicates a state in which the movable worktable can travel, and a travel stop that indicates that the mobile worktable 1 cannot travel And a travel stop display lamp 46 as display means. Each traveling operation means 43, 44 is provided with stick members 47, 48 that can be tilted in the front-rear direction. The stick members 47, 48 have two stick members 47, 48 in one hand of the operator. Are arranged close to each other with an interval N that can be operated by the fingers (for example, the index finger and the middle finger).

  Further, the bottom plate 38 is provided with a fall prevention frame 49 formed by standing a plate body so as to surround the safety fence 39 along the outer peripheral edge of the floor plate 10.

  Moreover, the opening part 50 which is the entrance opening part provided in one side surface of the safety fence 39 shall be able to install the door (not shown) which can be pushed open from the outer side of the fence 11 to the inside. Further, a saddle member 51 on which the user H can be seated is integrally provided in the travel control device 40. The traveling control device 40 and the saddle member 51 are provided to be rotatable in the horizontal direction. The operation lever 35 is disposed on the upper side surface of the saddle member 51.

  A jack device 53 having an operation pedal 52 is disposed below the base 3.

  Next, the operation of the movable workbench 1 having the above configuration will be described. First, regarding the method of transporting the movable workbench 1 to a desired position, the movable workbench 1 according to the present embodiment carries the movable workbench 1 by traveling to the desired position. When the movable workbench 1 is traveled, first, the direction in which the mobile workbench 1 is carried by being driven by the driving force from the motor 23 will be described. As shown in FIG. The operating levers 26 and 27 are pointed forward so that the driving force of the motor 23 can be transmitted to the driving wheels 5A and 5B, and the travelable display lamp 45 disposed in the travel control device 40 is lit. Confirm. Here, when the travel enable display lamp 45 is not lit, the travel stop button 41 is operated to cancel the travel stop state and confirm that the travel enable display lamp 45 is lit.

  Subsequently, the user H gets on the worktable body 2 and performs the traveling operation of the movable worktable 1. The traveling operation of the movable worktable 1 is performed by operating the stick members 47 and 48 of the traveling operation means 43 and 44.

  Here, the operation method of the stick members 47 and 48 of the travel operation means 43 and 44 will be described. The pair of travel operation means 43 and 44 can similarly control the drive wheels 5A and 5B provided in a pair independently. Therefore, one traveling operation means 43 controls one drive wheel 5A, and the other traveling operation means 44 controls the other driving wheel 5B. As shown in FIG. 8, when the movable workbench 1 is moved forward or backward, the pair of stick members 47 and 48 are tilted forward or rearward.

  Further, when the movable workbench 1 is changed in the right direction or the left direction, in particular, when the movable workbench 1 is changed in the forward direction, the direction opposite to the direction in which it is desired to bend as shown in FIG. When the stick member 47 of the traveling operation means 43 is tilted forward, one drive wheel 5A interlocked with the stick member 47 is driven, and the movable worktable 1 changes its direction using the other drive wheel 5B as a rotation axis. . Similarly, when the movable workbench 1 is changed in the backward direction, as shown in FIG. 10, when the stick member 47 of the traveling operation means 43 on the opposite side to the direction to be bent is tilted backward, the stick member One drive wheel 5A interlocked with 47 is driven, and the movable worktable 1 changes its direction with the other drive wheel 5B as a rotation axis.

  Further, when the movable workbench 1 is turned (turned) on the spot, the other stick member 48 is tilted forward and the one stick member 47 is tilted rearward as shown in FIG. By tilting the stick members 47 and 48 provided in a pair in the opposite directions, the drive wheels 5A and 5B interlocking with the stick members 47 and 48 are driven in the opposite directions to each other. Can change direction (turn) at a rotation angle of 360 degrees or more.

  Thereafter, after traveling to a predetermined position, the travel stop button 41 is operated to place the movable workbench 1 in a travel stop state. In the movable workbench 1 in the travel stop state, the travel stop display lamp 46 is turned on, and the drive wheels 5A and 5B are stopped. Here, the travel stop button 41 can be operated even when the movable workbench 1 is traveling, and is used when the mobile workbench 1 being traveled is suddenly stopped in an emergency or the like. Is possible.

  Regarding the switching of the traveling speed of the movable workbench 1, the motor which is the power source of the drive wheels 5A and 5B is operated by switching the traveling speed changeover switch 42 to a low speed traveling or high speed traveling scale (not shown). The number of rotations of 23 can be varied to switch to low speed driving or high speed driving.

  Here, when the universal wheel 4 is an omnidirectional traveling wheel, when traveling in a direction perpendicular to the main shaft 6, that is, when moving forward and backward, the barrel roller 10 itself does not rotate and the barrel roller 10 does not rotate. Together with the rotary support 7 that rotates about the center of the wheel 4 and rotates in the outer peripheral direction of the free wheel 4, and the meridian L sequentially contacts and travels. In this case, since the barrel roller 10 of the other wheel unit 8, 9 complements the discontinuous portion of the outer periphery L between the barrel rollers 10 of one wheel unit 8, 9, the forward and reverse movements are It is performed smoothly without rattling.

  In the case of traveling in the direction of the main shaft 6, that is, traveling in the left-right direction, the rotary support 7 does not rotate, but in the direction of the main shaft 6 around the rotating shaft 15 of the barrel-shaped roller 10 itself that is grounded. When the vehicle travels in the left-right direction by rotation, and travels in an oblique direction with respect to the main shaft 6, the rotational support 7 and the barrel roller 10 rotate at the same time in accordance with the inclination angle. Is performed.

  Thus, the rotation support body 7 and the barrel roller 10 of the free wheel 4 freely rotate corresponding to the traveling direction of the lifting / lowering table device 1, so that the free wheel 4 can move in any direction on the horizontal plane. In addition to being able to travel freely with no directionality, there is no extra resistance when moving from forward to reverse or when changing the direction of a steep angle, thus reducing the impact of the heavy lifting platform device 1 when changing direction. In this manner, no shaking occurs in the traveling direction of the lifting platform device 1. Therefore, by providing the work table body 2 on the upper part of the base 3 via the link mechanism 9, the lift platform is maintained with the operator placed on the high-floor type work table body 2 arranged at a high position with respect to the ground plane. When the device 1 is driven, by suppressing the impact generated from the free wheel 4 when the direction is changed, the work table body 2 is prevented from shaking due to the impact transmitted from the free wheel 4 to the work table body 2 through the base 3. The convenience such as workability and safety in the workbench main body 2 is improved. In addition, it is possible to adjust the direction of travel while traveling, so that it can travel on the desired path without meandering, and can accurately stop at a predetermined stop position without contacting other objects even in a narrow place. It becomes possible.

  Further, each of the first wheel unit 8 and the second wheel unit 9 has four barrel rollers 10 arranged at a constant pitch with respect to the outer peripheral portion of the rotary support 7. By arranging the barrel roller 10 provided in the unit 8 and the barrel roller 10 provided in the second wheel unit 9 with a phase shifted by a half pitch in the rotation direction around the main shaft 6 of the rear wheel, In the first wheel unit 8 and the second wheel unit 9 in the rotation direction around the main shaft 6, the overlapping portions of the longitudinal ends of the elastic body 12 of each barrel roller 10 are provided so as to extend the length of the elastic body 12. Smoother running by further preventing backlash during forward and reverse travel by preventing the two end portions with a thin shock absorption effect from touching the grounding surface independently by being formed thinner than the central part in the direction Let It is possible, by suppressing the wear of the ends of the elastic body 12, it is possible to extend the life of the barrel rollers 10, increasing the commercial value of the lifting table device 1.

  Further, the barrel roller 10 has a double structure including a core material 11 and an elastic body 12, so that it has mechanical strength capable of withstanding the load from the movable workbench 1 and workbench main body 2 and is in contact with it. It is possible to make the structure difficult to damage the ground.

  Further, as shown in FIG. 7, the movable work table 1 of the present embodiment has the operation levers 26, 27 of the travel switching means 24, 25, with the tips of the operation levers 26, 27 facing outward in the left-right direction. In the state where the transmission of the driving force is cut off, the movable workbench 1 can be driven by human power such as hand pushing, and the movable workbench of this embodiment is also used when a problem occurs in the electric system such as the motor 23. 1 can be moved quickly.

  As described above, the movable worktable 1 is self-running or manually driven, and after the movable worktable 1 is moved to a desired position, the travel stop button 41 is operated to stop the movable worktable 1 from traveling. At the same time, as shown in FIG. 7, the driving force from the motor 23 to the drive wheels 5A and 5B is cut off with the tips of the operation levers 26 and 27 of the travel switching means 24 and 25 facing outward in the left-right direction. When the travel stop button 41 is pressed to place the movable workbench 1 in the travel stop state, the travel stop display lamp 46 is lit, and it can be recognized at a glance that the mobile workbench 1 is in the travel stop state.

  Next, the direction change of the drive wheels 5A and 5B will be described. Here, the initial state is a state in which the traveling direction of the drive wheels 5A and 5B is the longitudinal direction of the worktable body 2 (X direction in the figure), and the travel direction of the drive wheels 5A and 5B is determined from that state. The case where the direction is changed in the short direction (Y direction in the figure) will be described.

  First, when the operation lever 35 is operated to pull the pin member 32 into the pin holding member 33, the engagement state between the pin member 32 and the second engagement recess 31 is canceled, and the pedestal 28 rotates in the horizontal direction. It becomes a free state.

  Next, the stick members 47 and 48 are operated while the pin member 32 is retracted to drive the drive wheels 5A and 5B in opposite directions, and the first rotation restricting means (not shown) and the base are attached. The drive wheels 5A and 5B are rotated by 90 degrees on the spot independently of the worktable body 2 together with the carriage until the frame 29 comes into contact with the pin member 32 and the first engagement recess 30.

  Finally, when the operation of the operation lever 35 is released and the pin member 32 and the first engagement recess 30 are engaged with each other, the carriage is held in a non-rotatable state in the horizontal direction, and the drive wheels 5A, 5A, The direction change in which the traveling direction of 5B is the short direction (Y direction in the drawing) of the worktable body 2 is completed.

  Next, a case where the traveling direction of the drive wheels 5A and 5B is changed from the short side direction (Y direction in the figure) to the long side direction (X direction in the figure) of the worktable body 2 will be described.

  First, when the operation lever 35 is operated to pull the pin member 32 into the pin holding member 33, the engagement state between the pin member 32 and the first engagement recess 30 is released, and the pedestal 28 rotates in the horizontal direction. It becomes a free state.

  Next, with the pin member 32 retracted, the stick members 47 and 48 are operated to drive the drive wheels 5A and 5B in opposite directions, so that the second rotation restricting means (not shown) and the base are attached. The drive wheels 5A and 5B are rotated by 90 degrees on the spot independently of the worktable body 2 together with the carriage until the working frame 29 comes into contact with the pin member 32 and the second engagement recess 31.

  Finally, when the operation of the operation lever 35 is released and the pin member 32 and the second engagement recess 31 are engaged with each other, the carriage is held in a non-rotatable state in the horizontal direction, and the drive wheels 5A, 5A, The direction change in which the traveling direction of 5B is the longitudinal direction (X direction in the drawing) of the worktable body 2 is completed.

  In this way, the drive wheels 5A and 5B provided so as to be rotatable independently of the work table body 2 via the pedestal 28 are arranged in the X direction (longitudinal direction of the work table body 2) and the Y direction (work) If the direction of the drive wheels 5A and 5B is changed, the work table main body 2 is changed in direction when one direction is set as the forward or reverse direction. It is possible to travel in a so-called substantially lateral direction in a direction orthogonal to one direction without causing the movement, and the posture of the worktable body 2 at the time of changing the direction is stable, and the drive wheels 5A and 5B are moved in one direction or orthogonal direction. Therefore, it is not necessary to perform switching traveling that repeats forward and backward while cutting the curve to the left and right, so that it is possible to smoothly change the direction without needless traveling space. Furthermore, the working table is kept in an arbitrary posture without limiting the traveling direction of the working table to either the longitudinal direction (X direction in the drawing) or the short direction (Y direction in the drawing) of the working table body 2. By making it possible to proceed, the degree of freedom of the workbench is improved and workability is also improved.

  Further, since the first rotation restricting means or the second rotation restricting means (both not shown) are provided, the pin member 32 and the first engagement recess 30 or the second engagement recess 31 face each other. Positioning becomes easier, and the operability related to the direction change of the drive wheels 5A and 5B is improved.

  In addition, the universal wheels 4 provided at the four corners of the base 3 are provided so as to be able to support the loads of the work table main body 2 and the base 3, and the pedestal 28 is provided so as to be displaceable also in the vertical direction. When the load from the base 3 is supported and the load acts on the drive wheels 5A and 5B, the pedestal 28 is displaced upward in the vertical direction relative to the base 3 to move to the drive wheels 5A and 5B. Since the structure is such that the acting load is avoided, the drive wheels 5A and 5B are rotatably provided regardless of the load from the worktable body 2 and the base 3, and the drive wheels 5A and 5B can be smoothly turned. Is possible.

  Here, the traveling control device 40 and the saddle member 51 are rotated so that the body of the user H seated on the saddle member 51 faces the driving wheels 5A and 5B in the traveling direction, thereby stabilizing the traveling control of the work table. And driving safety are improved. Further, since the saddle member 51 can be rotated, workability while sitting on the saddle member 51 is improved.

  Thereafter, after the movable workbench 1 is transported to a predetermined position, the operation pedal 52 of the jack device 53 provided in the base 3 is operated, and the free wheel 4 disposed on the base 3 on the jack device 53 side is moved to the ground. The movable workbench 1 is lifted from and held in a state where it cannot travel, and various work is performed using the movable workbench 1.

  The embodiment corresponds to claim 1, and is a movable workbench 1 including a workbench main body 2 and a plurality of wheels 4, 5A, 5B provided on the workbench main body 2, and includes a plurality of wheels. 4, 5A, 5B are provided with a free wheel 4 arranged to support the work table body 2 and at least a pair of drive wheels 5A, 5B provided so as to be driven independently from each other, and drive wheels 5A, 5B. The wheel angle setting means W includes a pedestal 28 in which the drive wheels 5A and 5B are rotatably provided on the worktable body 2, and a pedestal 28 having a predetermined position. As a fixing means that can be held every 90 degrees as a rotation angle, it is possible to engage with the first engagement recess 30 and the second engagement recess 31 provided at an interval of 90 degrees on the outer periphery of the base 28 and these. A pin member 32 provided on the fixing member, and a fixing operation means for operating the pin member 32 as the fixing means. An operation lever 35 is provided.

  In this case, the drive wheels 5A and 5B are independent of the work table body 2 in addition to the forward and backward movements by the free wheel 4 and the pair of drive wheels 5A and 5B, the direction change in the left-right direction, and the turn on the spot. By changing the direction, it is possible to run in the horizontal direction.

  Further, according to a second aspect of the present invention, the fixing means sets the predetermined rotation angle to approximately 90 degrees, and the first means as an engagement receiving portion provided on the outer periphery of the pedestal 28 at every predetermined rotation angle of 90 degrees. The engagement recess 30 and the second engagement recess 31, the first engagement recess 30 as the fixing means by the operation lever 35, the second engagement recess 31, and the pin member 32 provided so as to be engageable therewith. A pin member 32 is provided as an engaging portion provided to be engageable with the first engaging recess 30 and the second engaging recess 31 in accordance with the operation.

  In this case, it is possible to simplify the configuration in which the drive wheels 5A and 5B can change the direction independently from the worktable main body 2.

  Further, according to claim 3, the universal wheel 4 is provided at four corners which are at least three corners of the lower part of the base 3 provided at the lower part of the work table body 2. Support can be made more stable, and work safety and running stability of the movable workbench 1 can be improved.

  As an effect of the embodiment, by providing the pair of drive wheels 5A and 5B in the central portion of the base 3, the outer peripheral radius of the movable worktable 1 becomes the rotational radius of the movable worktable 1 as it is. This makes it easier to drive and improves running performance.

  In addition, a rotation support 7 that is rotatably supported by a main shaft 6 that is a rotation shaft of the universal wheel 4, and a barrel roller 10 that is a plurality of rotation bodies on the outer periphery of the rotation support 7 are orthogonal to the main shaft 6 of the universal wheel 4. It is set as the structure provided with the wheel units 8 and 9 which are the wheel structure provided rotatably in the direction to do.

  In this case, the rotation support 7 and the barrel roller 10 of the universal wheel 4 freely rotate corresponding to the traveling direction of the movable workbench 1 so that the universal wheel 4 can move in any direction on the horizontal plane. In addition to being able to travel freely with no directionality, there is no extra resistance when moving from forward to backward or when changing the direction of a steep angle. At the same time, no shake occurs in the traveling direction of the movable workbench 1. Further, by suppressing the impact generated from the free wheel 4 when the direction is changed, the work table body 2 is prevented from shaking due to the impact transmitted from the free wheel 4 to the work table body 2 through the base 3. Improve convenience such as workability and safety. In addition, it is possible to adjust the direction of travel while traveling, so that it can travel on the desired path without meandering, and can accurately stop at a predetermined stop position without contacting other objects even in a narrow place. It becomes possible.

  Further, a plurality of first wheel units 8 and second wheel units 9 which are wheel components are arranged in parallel on a main shaft 6 which is a rotating shaft of a universal wheel 4 which is a wheel, and a first wheel unit which is a plurality of wheel components. 8 and the second wheel unit 9 between the barrel-shaped rollers 10 and 66 which are rotating bodies of one of the first wheel unit 8 and the second wheel unit 9, and the first wheel which is the other wheel component. A barrel roller 10 which is a rotating body of the unit 8 and the second wheel unit 9 is arranged, and the outer periphery of the universal wheel 4 which is a wheel is formed by the rotating body 66.

  In this case, when the vehicle travels in a direction perpendicular to the main shaft 6 of the universal wheel 4, the barrel roller 10 itself does not rotate, and the barrel roller 10 rotates together with the rotary support 7 that rotates about the main shaft 6. It rotates in the outer peripheral direction, and its meridian L is grounded and travels sequentially. Here, the discontinuous portion of the outer circumference L between the barrel rollers 10, 10 of one wheel unit 8, 9 is mutually complemented by the barrel rollers 10 of the other wheel units 8, 9, so that the movable type When the vehicle 1 travels at right angles to the main shaft 6 of the universal wheel 4 of the work table 1, that is, when moving forward and backward, the movable work table 1 can be smoothly moved without rattling.

  Further, by using the barrel-shaped roller 10 formed in a barrel shape as the rotating body, the outer periphery of the free wheel 4 formed by arranging a plurality of barrel-shaped rollers 10 on the outer peripheral portion of the rotating support 7 is more true. It becomes possible to make the shape close to a circle, and the play of the free wheel 4 when the free wheel 4 travels in the direction of the main shaft 6 can be further suppressed, and the movable worktable 1 can be smoothly run.

  The stick members 47 and 48 are arranged so that the mutual stick members 47 and 48 are close to each other with an interval N operable between two fingers (for example, the index finger and the middle finger) of the user H. Thus, the operator H can perform the traveling operation of the movable worktable 1 with only one hand, and the operator H can freely use the other hand that is not used for the traveling operation. Therefore, workability and safety on the workbench main body 2 can be improved. Further, since the operator H can perform the traveling operation of the movable worktable 1 with only two fingers of one hand, the elevator device 1 can be traveled by a sensory operation. The traveling operability of the work table 1 is improved.

  Furthermore, each barrel unit 10 constituting each wheel unit 8, 9 is arranged on a rotary shaft 15 provided between the support portions 14 provided on the rotary support 7, thereby rotating each wheel unit 8, 9. By providing a structure in which the main shaft 6 is inserted through the boss 16 of the rotary support 7 and provided integrally via the support 7, the worktable body 2, the hydraulic cylinder 8, the link mechanism 9, the motor 23, etc. are attached to the base 3. With the mechanical strength that can withstand the shearing force caused by the load applied to the free wheel 4 from the movable workbench 1 that is a heavy object exceeding several hundred kilograms, the deformation of the main shaft 6 and the rotary support 7 is suppressed, The reliability of the universal wheel 4 which is an omnidirectional traveling wheel can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description of the common parts is omitted because it overlaps. Only the different parts will be described.

  In the movable workbench 1 according to this embodiment, the four free wheels 4, 4, 4, 4 disposed at the four corners of the base 3 are front wheels 4A disposed as a pair of left and right on the front side of the movable workbench 1. 4A and a pair of left and right rear wheels 4B and 4B disposed on the rear side of the movable workbench 1, and the axle directions P and Q of the front wheels 4A and the rear wheels 4B (that is, the axis of the main shaft 6) Direction) is provided in parallel with the horizontal direction and the left-right direction of the workbench main body 2 (the lateral direction Y of the workbench main body 2 in FIG. 16).

  Here, the free wheels 4, 4 constituting the front wheels 4 </ b> A, 4 </ b> A are connected to each other by a front wheel connecting frame 60 arranged in parallel with the axle direction P at a wheel fixing portion 21 which is an upper part of each other. Further, below the work table main body 2, there is provided a swinging connection frame 61 provided in parallel with the longitudinal direction X of the work table main body 2, which is in a direction orthogonal to the axle direction P and the horizontal direction.

  Further, a front wheel connecting member 60 is connected to one side in the longitudinal direction of the swing connecting frame 61, and the other side is connected to the opposite side through a pedestal 28 with the rotation axis 28B as an axis and the axle direction R in the horizontal direction. Drive wheels 5A and 5B that are rotatably provided are connected. Further, a pair of suspended portions 62, 62 that are vertically suspended in the vertical direction are provided at a substantially intermediate portion in the longitudinal direction of the swing connecting frame 61.

  On the other hand, between the pair of suspended frames 63, 63 suspended vertically downward from the front sides of the left and right sides of the base 3, a beam member 64 is installed in parallel with the axle directions P, Q. A pair of brackets 65, 65 are provided on the upper surface of the beam member 64.

  Then, the hanging portions 62 and 62 and the brackets 65 and 65 are connected by a shaft member 66 having an axial direction parallel to the axle directions P and Q, and the swing connection frame 61 is vertically rocked to the work table body 2. It is pivotally supported. Here, the hanging portions 62 and 62, the brackets 65 and 65, and the shaft member 66 constitute a second shaft portion 67. The front wheels 4A and 4A and the drive wheels 5A and 5B are configured to be relatively movable in the vertical direction with the second shaft portion 67 as a rotation axis.

  In the present embodiment, the movable work table 1 that is running is inclined from the flat ground F as shown in FIG. 17 by configuring the front wheels 4A and 4A and the drive wheels 5A and 5B to be relatively movable in the vertical direction. When the front wheels 4A, 4A that have reached the inclined ground S are moved upward along the inclination of the inclined ground S with the second shaft portion 67 as the rotational axis, the driving wheels 5A, 5B moves relative to the front wheels 4A and 4A that move vertically upward with the second shaft portion 67 as the rotation axis and moves downward in the vertical direction opposite to the front wheels 4A and 5B, thereby causing the drive wheels 5A and 5B to be grounded. As a result, a gripping force of the driving wheels 5A and 5B is improved when the movable workbench 1 that is traveling is approaching the sloped ground S from the flat ground F, and the movable workbench 1 is improved. 1 traveling performance is improved. That is, the drive wheels 5A, 5B arranged at the approximate center between the universal wheels 4, 4, 4, 4 arranged at the four corners of the base 3 are in contact with the inclined ground S, By preventing the wheels 5A and 5B from slipping from the ground contact surface of the movable workbench 1 between the free wheels 4 and 4 that are in contact with the flat ground F, the wheels 5A and 5B can be prevented from idling. The traveling performance of the work table 1 can be improved.

  As shown in FIG. 18, when the traveling movable workbench 1 is approaching the flat ground F from the inclined ground S, the front wheels 4A, 4A reach the flat ground F, and further drive wheels 5A, When 5B reaches the vicinity of the boundary between the flat ground F and the inclined ground S, when the driving wheels 5A and 5B move vertically upward with the second shaft portion 67 as the rotation axis, the front wheels 4A and 4A The front wheel in a state where it is moved relative to the drive wheel 5A, 5B, which has moved upward in the vertical direction with the shaft portion 67 of the second shaft as the rotation axis, moved downward in the vertical direction opposite to that of the drive wheel 5A Lower 4A and 4A. As described above, the posture of the worktable body 2 of the movable worktable 1 traveling from the inclined ground S to the flat ground F is changed from a state parallel to the inclined ground S to a state parallel to the flat ground F. Before the change, the front wheels 4A, 4A are lowered in advance and brought into contact with the flat ground F, thereby reducing the impact when the posture of the worktable body 2 is changed and stabilizing the traveling of the movable worktable 1. Can do. That is, before the change of the posture of the worktable body 2 due to the undulation of the travel surface of the movable worktable 1, the impact during travel is reduced by grounding the free wheel 4 to the travel surface, and the mobile worktable 1 The running stability of the vehicle can be improved.

  As described above, this embodiment corresponds to the fourth aspect, and the front shafts 4A and 4A including the free wheels 4 and 4 and the driving wheels 5A are provided on the second shaft portion 67 as the shaft portion provided on the worktable main body 2. , 5B are provided for relative movement.

  In this case, the front wheels 4A and 4A and the drive wheels 5A and 5B are moved relative to each other to prevent the drive wheels 5A and 5B from slipping due to the undulation of the traveling surface and to reduce the impact when the posture of the movable workbench 1 changes. can do.

  Further, the present embodiment corresponds to claim 5 and is a rocking body that is a connecting body in which the front wheels 4A and 4A including the universal wheels 4 and 4 are connected to one side and the driving wheels 5A and 5B are connected to the other side. A movable connecting frame 61 is provided, and the swing connecting frame 61 is pivotally supported by the second shaft portion 67 so that the seesaw can swing in the vertical direction.

  In this case, by swinging the front wheels 4A and 4A and the drive wheels 5A and 5B with a seesaw, it is possible to prevent the drive wheels 5A and 5B from slipping due to the undulation of the traveling surface with a simple structure and to change the posture of the movable workbench 1 The impact of time can be reduced.

  In addition, this invention is not limited to a present Example, A various deformation | transformation is possible. In this embodiment, two sets of wheel units including the first wheel unit 8 and the second wheel unit 9 are arranged in parallel with the rotary support 7 in the axial direction of the main shaft 6. 3 or more rows may be arranged in parallel. Further, the number of barrel rollers 10 provided in each of the wheel units 8 and 9 is not limited to four as in the above embodiment, and the number is not limited as long as it is two or more. To do. Further, the rotating body formed as the barrel roller 10 is not limited to the barrel shape, and the shape is not limited as long as it has a good rolling shape such as a cylinder, a cone, or a truncated cone. Further, in the present embodiment, the orientation of the main shaft 6 of the universal wheel 4 is arranged in a direction perpendicular to the front-rear direction of the movable worktable 1, but the orientation of the main shaft 6 is not limited to this and the movable worktable is not limited to this. 1 may be arranged in a direction parallel to the front-rear direction of 1 or inclined on a horizontal plane. Further, the structure of the base 3 and the configuration of the travel control device 40 can be changed as appropriate. Further, the travel speed set by the travel speed changeover switch 42 is not limited to two stages of low speed travel and high speed travel, but can be switched from low speed travel to high speed travel in at least two stages or from low speed travel to high speed travel. It may be possible to set up to steplessly. Further, a link mechanism that can be expanded and contracted is provided between the work table main body 2 and the base 3, and the work table main body 2 may be provided so as to be movable up and down. Furthermore, the movable workbench 1 of the present invention is not limited to the use of work in high places such as transportation work of people and luggage, electrical wiring work and interior / exterior work on the ceiling and wall surface of a building, It is applicable to various uses. In the second embodiment, the front wheels 4A and 4A are used as the free wheels 4 that are moved relative to the drive wheels 5A and 5B around the second shaft portion 67 to swing the seesaw. However, the rear wheels 4B and 4B may be used. .

1 is a perspective view of a movable workbench showing a first embodiment of the present invention. It is a side view of a movable worktable same as the above. It is a bottom side perspective view of a movable worktable same as the above. It is a front view of the universal wheel of a movable worktable same as the above. It is a side view of a universal wheel same as the above. It is a perspective view of a universal wheel same as the above. It is a sectional view of a barrel type roller in a universal wheel same as the above. FIG. 8 is an explanatory diagram showing the case where the movable workbench is advanced, FIG. 8A shows the operation of the stick member, and FIG. 8B shows the movement of the mobile workbench. FIG. 9 is an explanatory view showing a case where the movable workbench is changed in the forward direction, FIG. 9 (A) shows the operation of the stick member, and FIG. 9 (B) shows the movement of the movable workbench. ing. FIG. 10 is an explanatory view showing a case where the movable workbench is changed in the forward direction, FIG. 10 (A) shows the operation of the stick member, and FIG. 10 (B) shows the movement of the movable workbench. ing. FIG. 11A is an explanatory diagram showing a case where the movable workbench is changed its direction on the spot, FIG. 11A shows the operation of the stick member, and FIG. 11B shows the movement of the movable workbench. Show. It is a schematic plan view which shows the state which fixed the advancing direction of the drive wheel as the X direction in the movable work bench. It is a schematic top view which shows the state which fixed the advancing direction of the drive wheel as the Y direction in a movable work bench | top same as the above. It is a side view of the movable worktable which shows 2nd Example of this invention. It is a bottom side perspective view of a movable worktable same as the above. It is a principal part explanatory top view of a movable worktable same as the above. FIG. 4 is an explanatory diagram of a main part of a movable workbench that is running from a flat ground to an inclined ground. FIG. 4 is an explanatory diagram of a main part of a movable workbench that is running from an inclined ground surface to a flat ground surface.

Explanation of symbols

1 Movable work table 2 Work table body 4, 4A Swivel wheel (wheel)
5A, 5B Drive wheel (wheel)
28 pedestal
30 1st engagement recessed part (engagement receiving part)
31 2nd engagement recessed part (engagement receiving part)
32 Pin member (engagement part)
35 Operation lever (fixed operation means)
61 Swing connection frame (connector)
67 Second shaft (shaft)
W Wheel angle setting means

Claims (5)

  A movable workbench comprising a workbench main body and a plurality of wheels provided on the workbench main body, wherein the plurality of wheels are mutually connected to a free wheel arranged to support the workbench main body. And at least a pair of driving wheels provided so as to be independently driven, and wheel angle setting means for setting the driving wheel to an arbitrary angle, the wheel angle setting means, A movable type comprising: a pedestal provided rotatably on a pedestal body; a fixing means provided so as to be able to hold the pedestal at every predetermined rotation angle; and a fixing operation means for operating the fixing means. Workbench.   The fixing means includes an engagement receiving portion provided on the pedestal for each predetermined rotation angle, and an engagement portion provided to be engageable with the engagement receiving portion. The movable workbench according to claim 1, wherein:   The movable worktable according to claim 1 or 2, wherein the universal wheels are provided at at least three corners of the worktable.   The movable worktable according to any one of claims 1 to 3, wherein the universal wheel and the drive wheel are provided on a shaft portion provided on the worktable body so as to be relatively movable.   A connecting body in which the universal wheel is connected to one side and the driving wheel is connected to the other side is provided, and the connecting body is pivotally supported by the shaft portion so as to be swingable in a seesaw direction. The movable workbench according to claim 4.