JP2015202928A - On-vehicle work table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle work table including a work table body which may slew in a horizontal direction.SOLUTION: An on-vehicle work table 1 includes: a base 4 which may be detachably mounted on a load-carrying platform of a vehicle; a lifting device 5 provided on the base 4; a top plate part 38 provided on the lifting device 5 and serving as a base part; a slewing gear 6 provided on the top plate part 38; a work table base part 81 provided on the slewing gear 6; and a work table body provided on the work table base part 81. The slewing gear 6 includes: a shaft part provided on the top plate 38; a track part provided at an area which is located at the outer side of the shaft part and on the top plate part 38; an outer ring part 62 provided below the work table base part 81 and serving as a slewing part; and a rolling member which is attached to the outer ring part 62 and rolls on the track part. The work table base part 81 is fixed to the shaft part.

Description

  The present invention relates to an in-vehicle work table that can be mounted on a loading platform of a vehicle.

  2. Description of the Related Art Conventionally, a crane device with an aerial work platform disclosed in Patent Document 1 described below is a work table that can be moved up and down and used to perform a work at a high place and that can turn the work table in a horizontal direction. is there. This crane device has a turning device at the bottom of the work platform. The turning device has an electric motor, a drive pinion that rotates via a speed reducer by the drive of the electric motor, and is fixed below the center of the bottom frame of the work platform. Mounted driven gear. The work platform is rotatably coupled to the coupling platform via a vertical axis that passes through the center of the driven gear. In this turning device, a drive pinion that rotates via a speed reducer by driving of an electric motor meshes with a driven gear, and the work platform performs a turning operation.

JP-A-9-48596

  However, since this work platform is supported only by the vertical shaft and the driven gear, there is a problem in that the support area of the work platform is small, and the work platform easily shakes during turning. To solve this problem, it is possible to use a cross roller bearing as a bearing for the rotating table that fixes the workbench body, but in order to reduce the shaking of the workbench body when turning, a cross roller with a large diameter is used. The problem arises that bearings are required and the manufacturing costs are very high.

  In addition, since the work platform of Patent Document 1 is supported only by the vertical shaft and the driven gear, there is a problem that the load on the vertical shaft is large and the vertical shaft must be huge and strong.

  Therefore, the present invention provides a bearing for supporting the worktable body on the outside of the turntable that supports the worktable body to reduce the load on the center axis of the turntable and at a place away from the center axis. It is a first object of the present invention to reduce shaking at the time of turning of the worktable body by supporting the worktable body.

  A second object is to reduce the manufacturing cost by using a plurality of inexpensive bearings as bearings for supporting the workbench main body.

  A third object is to facilitate the replacement of the bearings by making the bearings detachable individually.

  An in-vehicle worktable according to claim 1 is a base that can be detachably mounted on a cargo bed of a vehicle, a lifting device provided on an upper part of the base, a base part provided on an upper part of the lifting device, and the base A swiveling device provided on an upper part of the vehicle, a worktable base provided on the upper part of the swivel device, and a worktable body provided on the upper part of the worktable base, A shaft portion provided on the upper portion of the base portion, a track portion provided outside the shaft portion and provided on the upper portion of the base portion, a turning portion provided on a lower portion of the work table base portion, and the turning portion And a rolling member that rolls on the track portion, and the work table base portion is fixed to the shaft portion.

  The on-vehicle work bench according to claim 2 is characterized in that the rolling member is a cam follower.

  The on-vehicle work bench according to claim 3 is characterized in that the track portion has a plate shape, and the rolling member rolls on the upper and lower surfaces of the track portion.

  According to a fourth aspect of the present invention, an on-vehicle worktable includes a track support portion that supports the track portion, and an insertion hole through which the rolling member can be inserted is formed in the track support portion.

  According to the first aspect of the present invention, it is possible to reduce the shaking of the worktable body during turning.

  According to invention of Claim 2, the manufacturing cost of a turning apparatus can be held down low.

  According to the invention of claim 3, the turning motion of the worktable body can be stabilized.

  According to invention of Claim 4, a rolling member can be attached or detached separately, without dismantling a turning apparatus.

It is a front view of the vehicle-mounted worktable in the state which removed the worktable body which shows Example 1 of this invention. FIG. 2 is a perspective view of an on-vehicle work table in which the work table main body is removed and the work table base is turned 90 ° leftward. It is a right view of the vehicle-mounted work bench at the time of vehicle mounting same as the above. FIG. 3 is a right side view of the on-vehicle work table when the vehicle is mounted with the work table body turned 90 ° to the right. FIG. 2 is a front view of the on-vehicle work table when mounted on the vehicle. It is a top view of the vehicle-mounted workbench of a state which removed the workbench main body same as the above. It is AA sectional drawing of a top plate part, a turning apparatus, and a worktable base part same as the above. FIG. 8 is an enlarged view of the main part of FIG. It is a principal part perspective view of a turning apparatus same as the above. It is a perspective view of a cam follower same as the above.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  Hereinafter, Embodiment 1 of the on-vehicle worktable of the present invention will be described with reference to FIGS. The in-vehicle work table 1 of the present embodiment includes a base 4 that can be detachably mounted on a loading platform 3 of a vehicle 2 such as a truck, a scissor-link type lifting device 5 provided on the top of the base 4, and a lifting device. 5 is provided with a swivel device 6 provided at the upper part of the swivel device 5, and a work table main body 7 provided at the upper part of the swivel device 6.

  The base 4 includes a frame body 11 having a substantially rectangular shape in plan view, and leg portions 12 erected on the outside of the four corners of the frame body 11, and is formed in a size that can be accommodated in the loading platform 3 of the vehicle 2. .

  A pair of support legs 13 that support the vehicle-mounted workbench 1 are foldably provided on the left and right side surfaces of the frame body 11. The support legs 13 are so-called outriggers, and project to the left and right when the vehicle-mounted workbench 1 is used, and contact the ground, thereby supporting the vehicle-mounted workbench 1 and improving stability.

  The support leg 13 includes a fixed portion 14 fixed to the left and right side surfaces of the frame 11, a rectangular tube-shaped first support frame 15 connected to the fixed portion 14 so as to be rotatable in the horizontal direction, A square cylindrical second support frame 16 slidably connected in the first support frame 15, and a square cylindrical third support slidably connected in the second support frame 16. A support frame 17, a square cylindrical fourth support frame 18 slidably connected in the third support frame 17, and a wheel support portion 19 attached to the tip of the fourth support frame 18 Wheel 20 is provided. Further, the wheel support portion 19 has an operator who rotates the first support frame 15 or slides the second support frame 16, the third support frame 17 and the fourth support frame 18. A grip portion 21 that is gripped by a hand is provided. The wheel 20 is made of synthetic resin.

  Here, the use procedure of the support leg 13 will be described. First, as shown in FIG. 1, the first support frame 15 is restricted from rotating from the state where the support leg 13 is folded. The restriction portion (not shown) is released, and the first support frame 15 is made rotatable. Then, the first support frame 15 is rotated so as to protrude in the left-right direction of the vehicle-mounted workbench 1. Next, a second restricting portion (not shown) that restricts the sliding of the second support frame 16 is released, and the second support frame 16 can be slid. Then, the second support frame 16 is slid and pulled out from the first support frame 15. When the second support frame 16 is pulled out from the first support frame 15 as much as possible, the second support frame 16 rotates downward, and the second support frame 16 rotates downward to be perpendicular to the ground. And Next, the third restricting portion (not shown) and the fourth restricting portion (not shown) for restricting the sliding of the third support frame 17 and the fourth support frame 18 are released, respectively. The third support frame 17 and the fourth support frame 18 are slidable. Then, the third support frame 17 and the fourth support frame 18 are slid downward to ground the wheel 20 to the ground. When the sliding of the third support frame 17 and the fourth support frame 18 is restricted by the third restriction part and the fourth restriction part in this state, the installation of the support legs 13 is completed. In addition, when folding the support leg 13, a procedure reverse to the above procedure is performed.

  At the front portion of the frame body 11, a step platform 22 is provided on which a foot is placed when an operator moves up and down to the worktable body 7.

  A pair of lower guide rails 23 on which link rollers 37 to be described later roll are formed in the front-rear direction on the upper portions of the left and right frame bodies 11.

  At the lower end portion of the leg portion 12, a rectangular flat plate-like leg bottom portion 24 for stably mounting the in-vehicle work table 1 on the loading platform 3 is formed. Further, in order to more stably place the vehicle-mounted workbench 1, the front and rear leg bottom portions 24 are separately connected to the left and right by rectangular tube-shaped leg connecting members 25.

  A plate-like hooking plate portion 27 in which a long hole-like hooking hole 26 is formed is provided on the upper portion of the front surface and the rear surface of the leg portion 12. A wire 28 is inserted into the hooking hole 26, and the wire 28 is fixed to the loading platform 3 to prevent the vehicle-mounted work platform 1 from being displaced on the loading platform 3.

  On the upper part of the frame body 11, a scissor-link type lifting device 5 having two upper and lower stages for moving up and down the work table body 7 is provided. The lifting device 5 includes a link mechanism 35 composed of a lower inner link 31, a lower outer link 32, an upper inner link 33 and an upper outer link 34, a cylinder mechanism 36 for expanding and contracting the link mechanism 35, and a cylinder mechanism 36. And a cylinder driving device (not shown) to be driven.

  The lower end portion of the lower outer link 32 is rotatably connected to the rear portion of the lower guide rail 23 formed at the upper part of the left and right frame bodies 11. A lower link roller 37 made of synthetic resin that rolls on the lower guide rail 23 is rotatably attached to the lower end portion of the lower inner link 31, and the lower link roller 37 rolls into the guide rail 23. It is arranged freely. When the link mechanism 35 contracts, the lower link roller 37 rolls forward, and when the link mechanism 35 extends, the lower link roller 37 rolls backward.

  A top plate portion 38 having a rectangular shape in plan view, which is a base portion, is provided on the upper portion of the link mechanism 35. The swivel device 6 is disposed on the rear side of the top plate portion 38, and the front side is formed in a mesh shape. A pair of upper guide rails 39 are formed in the front-rear direction at the left and right lower portions of the top plate portion 38.

  The upper end portion of the upper inner link 33 is rotatably connected to the rear portion of the upper guide rail 39. A synthetic resin upper link roller 40 that rolls on the upper guide rail 39 is rotatably attached to the upper end portion of the upper outer link 34, and the upper link roller 40 is placed in the upper guide rail 39. It is arranged so that it can roll freely. When the link mechanism 35 contracts, the upper link roller 40 rolls forward, and when the link mechanism 35 extends, the upper link roller 40 rolls backward.

  The cylinder mechanism 36 is connected between the base 4 and the upper stage inner link 33. When the cylinder mechanism 36 contracts, the link mechanism 35 contracts, and when the cylinder mechanism 36 extends, the link mechanism 35 also expands.

  Next, the swivel device 6 will be described with reference to FIGS. The turning device 6 is provided in an annular shape outside the shaft portion 41 and the turning drive portion 42, a shaft portion 41 that is a turning center axis, a turning drive portion 42 that is a drive source for turning the worktable body 7, and the turning portion 6. And an annular holding portion 43.

  The shaft portion 41 includes a cylindrical shaft fixing portion 44 fixed to the top plate portion 38, and a cylindrical shaft turning portion 45 that is pivotably combined with the upper portion of the shaft fixing portion 44. A small diameter portion 46 having a small outer diameter is formed on the upper portion of the shaft fixing portion 44, and the small diameter portion 46 is inserted into the shaft turning portion 45 so that the shaft fixing portion 44 and the shaft turning portion 45 are combined. Yes. The shaft turning portion 45 rotates around the small diameter portion 46, and the shaft portion 41 functions as the rotation center of the worktable body 7.

  The turning drive unit 42 includes an electric motor 47, a speed reducer 48, a first gear 49 that rotates via the speed reducer 48, and a second gear 51 that is fixed to the upper surface of the shaft turning unit 45 by a bolt 50. It has. The turning drive unit 42 has a configuration in which the first gear 49 rotates through the speed reducer 48 and the second gear 51 engaged with the first gear 49 rotates by driving the electric motor 47 that is a drive source. ing. The electric motor 47 and the speed reducer 48 are fixed to the upper surface of the top plate portion 38 with bolts 50.

  The second gear 51 has a disk shape, and a circular center hole 52 is formed at the center. A plurality of circular weight reduction holes 53 for reducing the weight of the second gear 51 are formed around the center hole 52.

  The annular holding portion 43 has an annular shape and is disposed so as to surround the shaft portion 41 and the turning drive portion 42 with the shaft portion 41 as the center. The annular holding portion 43 includes an annular inner ring portion 61 and an outer ring portion 62 that is an annular turning portion disposed outside the inner ring portion 61.

  The inner ring portion 61 is formed by projecting inwardly on the entire circumference of the lower end of the inner ring body 63, and a raceway portion 64 formed on the outer surface of the inner ring body 63. And a plate-shaped inner ring bottom 65. The inner ring bottom portion 65 is joined to the top plate portion 38 by welding.

  The track portion 64 is formed in a plate shape that protrudes outward over the entire circumference at the middle portion in the vertical direction of the outer surface of the inner ring body 63. In addition, a plurality of semicircular notches 66 are formed above the raceway 64 of the inner ring main body 63 by notching the inner ring main body 63 in a substantially semicircular shape. A plurality of circular holes 67 that are circular through holes are formed below the raceway portion 64 of the inner ring main body 63. The semicircular notch 66 is formed in a size that allows insertion of a large cam follower 76 described later, and the circular hole 67 is formed in a size that allows insertion of a small cam follower 77 described later.

  The outer ring part 62 is composed of a cylindrical outer ring main body 68 and an annular plate part 69 in which a thin plate joined to the upper end surface of the outer ring main body 68 is formed in an annular shape, and its longitudinal section is substantially T-shaped. It has become. The outer ring main body 68 is disposed in parallel with the inner ring main body 63. Since the annular plate portion 69 is joined to a worktable base 81 described later, the outer ring portion 62 rotates around the inner ring main body 63 together with the worktable base 81.

  The outer ring main body 68 has 20 mounting holes 70 on the upper side and 20 mounting holes 70 on the lower side. The positions of the upper mounting hole 70 and the lower mounting hole 70 are shifted to the left and right, and the distances between the adjacent mounting holes 70 are equal. A cam follower 71 that is a rolling member is inserted into and attached to the mounting hole 70. The cam follower 71 is a bearing with a shaft, and includes a shaft portion 72 and an outer ring 73 rotatably attached to one end side of the shaft portion 72. A screw portion 74 is formed and can be tightened by a nut 75. The cam follower 71 inserted through the mounting hole 70 is fixed by a nut 75 from the other end side of the shaft portion 72. A large cam follower 76 having a large outer diameter of the outer ring 73 is attached to all the upper mounting holes 70, and a small cam follower 77 having a small outer diameter of the outer ring 73 is attached to all the lower mounting holes 70. Accordingly, 20 large cam followers 76 and 20 small cam followers 77 are attached. The cam follower 71 is attached so that the outer ring 73 is disposed inside the outer ring portion 62, the large cam follower 76 rolls on the upper surface of the track portion 64, and the small cam follower 77 rolls on the lower surface of the track portion 64. That is, the large cam follower 76 and the small cam follower 77 roll so as to sandwich the track portion 64.

  Here, attachment / detachment of the cam follower 71 will be described. When the annular holding portion 43 is assembled, first, the large cam follower 76 is inserted into the mounting hole 70 of the outer ring portion 62 and fixed with the nut 75. Next, the outer ring part 62 to which all the large cam followers 76 are attached is disposed outside the inner ring part 61. At this time, the large cam follower 76 comes into contact with the upper surface of the track portion 64 and can roll. Next, the outer ring portion 62 is rotated so that one of the attachment holes 70 formed on the lower side of the outer ring portion 62 is aligned with one of the circular holes 67 formed in the inner ring main body 63. Then, the small cam follower 77 is inserted into the circular hole 67 and the attachment hole 70 from the inner side of the inner ring part 61, the outer ring 73 is brought into contact with the inner surface of the outer ring part 62, and the small cam follower 77 is moved from the outer side of the outer ring part 62. Secure with nut 75. Similarly, by rotating the outer ring portion 62 and fixing all the small cam followers 77 with the nuts 75 while aligning the positions of the other mounting holes 70 and the arbitrary circular holes 67, the annular holding portion 43 is formed. .

  Next, a case where the individual cam followers 71 are replaced will be described. When replacing the large cam follower 76, the outer ring portion 62 is rotated, the large cam follower 76 is aligned with the position of the semicircular notch 66, the nut 75 is removed, and the large cam follower 76 is pulled out from the inside of the inner ring portion 61. . Then, a new large cam follower 76 is inserted from the inner side of the inner ring part 61, the outer ring 73 is brought into contact with the inner surface of the outer ring part 62, and the large cam follower 76 is fixed by a nut 75 from the outer side of the outer ring part 62. When replacing the small cam follower 77, the outer ring portion 62 is rotated, the small cam follower 77 is aligned with the position of the circular hole 67, the nut 75 is removed, and the small cam follower 77 is pulled out from the inside of the inner ring portion 61. Then, a new small cam follower 77 is inserted from the inner side of the inner ring part 61, the outer ring 73 is brought into contact with the inner surface of the outer ring part 62, and the small cam follower 77 is fixed by a nut 75 from the outer side of the outer ring part 62. As described above, the individual cam followers 71 can be replaced without disassembling all the annular holding portions 43.

  On the upper surface of the second gear 51, a circular plate member 79, which has a circular plate shape and is formed with a circular round hole 78 at the center, is fixed by a bolt 50. A rectangular plate member 80 is fixed to the upper surface of the circular plate member 79 by bolts 50. The plate members 80 are provided at four locations, and the distances between the adjacent plate members 80 are equal.

  A work table base 81 for mounting and fixing the work table body 7 is provided on the upper part of the swivel device 6. The work table base 81 has a rectangular shape in front view that is long in the front-rear direction. The work frame base 81 has an outer frame 82 formed of a rectangular tube-shaped frame and a plurality of rectangular tube-shaped frames arranged vertically, horizontally, and And an inner frame 83 connected obliquely. The arrangement of the inner frame 83 is strong enough to hold the workbench main body 7 and can be changed as appropriate if there is a space that allows the cam follower 71 to be attached and detached. However, a rectangular frame portion 84 in which the frame is connected to a rectangle is formed in the upper portion of the second gear 51. A connecting member 85 that connects the plate member 80 and the worktable base portion 81 is joined to the inner surface of the rectangular frame portion 84 by welding. This joining member 85 is provided at four locations corresponding to the position of the plate member 80, and includes a rectangular plate part 86 joined to the rectangular frame part 84 and two trapezoids protruding inward from the rectangular plate part 86. And a plate portion 87. The trapezoidal plate portion 87 is joined to the plate member 80 by welding.

  The work table base 81 is joined to the upper surface of the outer ring part 62 by welding via a plate-like joining plate member 88. The worktable base 81 is not in contact with the inner ring portion 61.

  The worktable body 7 includes a bottom plate portion 91 having a rectangular shape in front view that is long in the front-rear direction, and a fall prevention fence 92 for preventing the fall. A door portion 93 for allowing an operator to get on and off the worktable body 7 is disposed at the front side portion of the fall prevention fence 92 so as to be freely opened and closed. The bottom plate portion 91 of the worktable main body 7 has the same size as the portion surrounded by the outer frame 82 of the worktable base 81, and is placed on the upper surface of the worktable base 81 so that the longitudinal directions overlap each other. It is fixed.

  Further, the work table body 7 is provided with an operating means 94 for an operator to operate the lifting and lowering operation of the lifting device 5 and the turning device 6. The elevating device 5 and the turning device 6 are connected to the operation means 94 by cables 95, respectively.

  Here, the effect | action is demonstrated about the vehicle-mounted workbench 1 of the said structure. First, the in-vehicle work table 1 is moved to the work position in a state where it is mounted on the loading platform 3 of the vehicle 2. Next, the support leg 13 is installed on the ground by the procedure described above. Next, an operator gets on the worktable body 7, operates the operating means 94 to drive the lifting device 5, and raises and lowers the worktable body 7 to an arbitrary height. Next, the operating means 94 is operated to drive the turning device 6 to turn the worktable body 7 horizontally to the working position. Thereby, it is possible to work at a high place by approaching the work position.

  The operation of the turning device 6 will be described in detail. When the operator operates the operating means 94 to drive the electric motor 47, the first gear 49 starts to rotate via the speed reducer 48, and the first gear 49 is moved to the first gear 49. At the same time as the meshed second gear 51 rotates, the work table base 81 fixed to the second gear 51 starts to rotate. Simultaneously with the rotation of the work table base 81, the outer ring part 62 joined to the work table base 81 rotates, and the outer ring 73 of the cam follower 71 rolls on the track part 64. Then, the work table body 7 fixed to the upper surface of the work table base 81 rotates. The worktable body 7 can be rotated 360 ° in either direction.

  As described above, in this embodiment, the base 4 that can be detachably mounted on the loading platform 3 of the vehicle 2, the lifting device 5 provided on the top of the base 4, and the turning device provided on the top of the lifting device 5. 6 and a workbench main body 7 provided on the upper part of the swivel device 6, wherein the swivel device 6 is a ceiling that is a base portion fixed to the upper part of the lifting device 5. A plate portion 38, a shaft portion 41 provided on the top of the top plate portion 38, a track portion 64 disposed outside the shaft portion 41 and on the top plate portion 38, and the track portion And a cam follower 71 that is a rolling member that rolls around 64, and an outer ring portion 62 that is connected to the top plate portion 38 via the shaft portion 41 and is a turning portion to which the cam follower 71 is fixed. Thus, it is possible to reduce the shaking of the worktable body 7 during turning. Moreover, the vehicle-mounted workbench 1 provided with the simple and cheap swivel device 6 can be provided.

  In this embodiment, since the rolling member is the cam follower 71, the manufacturing cost of the turning device 6 can be reduced. Moreover, since the cam follower 71 is a lightweight member, the turning device 6 can be reduced in weight.

  Further, in this embodiment, the track portion 64 has a plate shape, and the cam follower 71 rolls on the upper and lower surfaces of the track portion 64, whereby the turning operation of the worktable body 7 can be stabilized.

  Further, in this embodiment, the inner ring body 63 that is a track support portion that supports the track portion 64 is provided, and a semicircular cutout portion 66 that is an insertion hole into which the cam follower 71 can be inserted into the inner ring body 63 and a circular shape. Since the holes 67 are formed, the cam followers 71 can be individually attached and detached without disassembling the swivel device 6.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, although the cam follower of the embodiment is attached at 20 locations on the upper and lower sides, the number can be changed as appropriate according to the weight of the worktable body. It is also possible to mount a safety device such as a vehicle body tilt warning device or an overload prevention device.

DESCRIPTION OF SYMBOLS 1 In-vehicle worktable 2 Vehicle 3 Loading platform 4 Base 5 Lifting device 6 Turning device 38 Top plate part (base part)
41 Shaft part 62 Outer ring part (turning part)
63 Inner ring body (orbit support part)
64 Track part 66 Semicircle notch (insertion hole)
67 Circular hole (through hole)
71 Cam follower (rolling member)

Claims (4)

A base that can be detachably mounted on the loading platform of the vehicle;
An elevating device provided at the top of the base;
A base portion provided at an upper portion of the lifting device;
A swivel device provided at an upper portion of the base portion;
A worktable base provided at the top of the swivel device;
An in-vehicle workbench comprising a workbench main body provided at an upper part of the workbench base,
The swivel device includes: a shaft portion provided on an upper portion of the base portion; a track portion provided on the outer side of the shaft portion and on the upper portion of the base portion; and a swivel portion provided on a lower portion of the work table base portion; A rolling member attached to the swivel part and rolling on the track part,
An in-vehicle work table, wherein the work table base is fixed to the shaft part.   The on-vehicle worktable according to claim 1, wherein the rolling member is a cam follower.   The on-vehicle worktable according to claim 1 or 2, wherein the track portion has a plate shape, and the rolling member rolls on the upper and lower surfaces of the track portion.   The track support part which supports the said track part is provided, The penetration hole which can penetrate the said rolling member in the said track support part is formed, The any one of Claims 1-3 characterized by the above-mentioned. Car work table.

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