JP6047626B1 - Work cart - Google Patents

Abstract

An object of the present invention is to provide a robust work carriage that is easy to operate and can be obtained at low cost by using simple lifting means for a scaffolding plate. A working carriage 1 includes a carriage body 2 including a base 4 and pillars 5 at four corners thereof, and a scaffold plate 3 supported by the pillar 5 so that the height position thereof can be changed. The cart body 2 includes a front steering wheel 6, a rear drive wheel 7, and a steering shaft 8. The front left and right support columns 5 are connected by a horizontal rail 9, and a steering shaft support member 10 is fixed thereto. The rear left and right struts 5 are connected by a rear crosspiece 11. A pair of left and right hand handles 12 extend to the rear, and are connected by a horizontal footrest bar 13 therebetween. A plurality of horizontal support bars 14 are connected between the front and rear struts 5, and the scaffolding plate 3 is supported by these. The frame body 15 of the scaffolding plate 3 is placed on the horizontal side 14b between the end sides 14d of the support bar 14, and the unfolding projection piece 14c faces the inner side of the lower side. The space between the rear left and right columns 5 is stopped by the frame 15 of the scaffold plate 3. [Selection] Figure 1

Description

  The present invention relates to a work cart that provides a scaffold that can be used when working at a high place on a farm or the like.

  2. Description of the Related Art Conventionally, there has been proposed a work cart that can propel the vehicle body while driving a traveling wheel with an electric motor, and allow an operator to get on a work table that can be moved up and down to perform work at a high place (see, for example, Patent Document 1). ). In this work carriage, a pantograph-like lifting means is installed upright in the longitudinal direction at the center in the left-right direction of the machine body. The elevating means expands and contracts in the vertical direction by expansion and contraction of the hydraulic cylinder, and changes the height of the work table. The driving power for the traveling wheels and the driving power for the hydraulic cylinders are obtained from an in-vehicle battery.

JP 2006-206260 A

Since the conventional work cart obtains the drive power of the hydraulic cylinder from the on-board battery, there is a problem of expediting battery consumption. Further, since the elevating means is of a pantograph type, a complicated mechanism corresponding to the change in the center of gravity accompanying expansion and contraction is required for security.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a robust work cart that is easy to operate and can be obtained at low cost by using simple manual lifting means without using battery-driven lifting means.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above-mentioned problems, a work carriage 1 according to the present invention includes a carriage main body 2 including a horizontal base 4 and a pillar 5 erected at four corners of the base 4 in a generally rectangular shape in plan view. The support plate 5 of the main body 2 is provided with a scaffold plate 3 having a substantially rectangular shape in plan view that is horizontally supported so that the height position can be changed. The carriage body 2 further has a pair of steering wheels 6 provided on the left and right in front of the base 4, a pair of drive wheels 7 provided on the left and right in the rear of the base 4, and a length in the front center of the base 4. And an adjustable steering shaft 8. The front left and right support columns 5 are connected by a horizontal crosspiece 9 at the top, and a steering shaft support member 10 that rotatably supports the upper portion of the steering shaft is fixed to the horizontal crosspiece 9. The rear left and right struts 5 are connected by at least one horizontal step-and-use rear crosspiece 11. A push handle 12 extends rearward from the lower portion of each of the left and right support columns 5, and the two handles 12 are connected by a horizontal footrest bar 13. The leg bar 13 and the rear crosspiece 11 provide a step for boarding on the scaffolding plate 3 arranged at a high place. The front and rear struts 5 are connected to each other by a plurality of horizontal support bars 14 provided at left and right facing positions with an interval in the vertical direction, and the scaffolding plate 3 is supported on the support bars 14. The scaffold plate 3 includes a frame body 15 made of a groove-type steel material coupled in a rectangular frame shape with the groove facing inward, and a rectangular steel plate top plate 16 welded to the upper surface of the upper side 15a of the frame body 15. It has. The scaffold plate 3 is selectively detachably placed on any one pair of support bars 14 facing left and right. The support bar 14 includes a vertical side 14a screwed to the inner side in the left-right direction of each of the front and rear columns 5, a horizontal side 14b extending so as to face the inner side from the lower edge of the vertical side 14a, and the horizontal Opening protrusions 14c that stand vertically from the inner edge of the rear part of the side 14b, and an end that vertically connects the vertical side 14a and the horizontal side 14b at the front and rear ends to prevent the scaffold plate 3 from slipping back and forth. 14d. The lower side 15b of the frame 15 of the scaffolding plate 3 is placed on the horizontal side 14b between the end sides 14d of the support bar 14, and the opening stop projection 14c faces the inner edge of the lower side 15b. The space 5 between the left and right columns is prevented from opening left and right via the scaffold plate 3.

  In the work cart 1 of the present invention, the installation position of the scaffold board 3 can be easily changed up and down by selecting the support bar 14 at an arbitrary height and placing the scaffold board 3 on the support bar 14. The installation of the scaffolding plate 3 prevents the rear left and right support columns 5 from opening, so that an operator can get on the scaffolding plate 3 even if there is no horizontal beam for the support of the support column 5 above the scaffolding plate 3. Sometimes the left and right struts 5 do not open. Since there is no horizontal rail above the scaffold plate 3, it does not interfere with the path when boarding the scaffold plate 3, and safety is improved. The whole structure is simple and can be provided at a low cost.

It is a perspective view of the work trolley concerning the present invention. It is a front view of the work trolley | bogie of FIG. It is a rear view of the work trolley | bogie of FIG. It is a side view of the work trolley | bogie of FIG. It is a top view of the work trolley | bogie of FIG. FIG. 2 is an enlarged plan view of a part of the work carriage in FIG. 1. It is VII-VII sectional drawing in FIG. It is the perspective view which notched a part of scaffolding board in the work trolley | bogie of FIG. It is a perspective view of the support bar in the work trolley | bogie of FIG.

Embodiments of the present invention will be described with reference to the drawings.
The work carriage 1 includes a carriage body 2 and a scaffold plate 3. The cart body 2 includes a horizontal base 4 that is generally rectangular in plan view, and columns 5 that are erected at the four corners of the base 4. The scaffold plate 3 has a substantially rectangular shape in plan view, and is horizontally supported by the column 5 of the carriage body 2 so that the height position can be changed.

  The carriage body 2 further has a pair of steering wheels 6 provided on the left and right in front of the base 4, a pair of drive wheels 7 provided on the left and right in the rear of the base 4, and a length in the front center of the base 4. And an adjustable steering shaft 8.

  A battery 19 is attached to the front lower part of the base 4, and a drive motor 20 and a transmission mechanism 21 are provided to the lower rear part. The rotation of the motor 20 is transmitted to the drive wheel 7 via the transmission mechanism 21. Although not shown, the motor control switch is provided at a position where the operator who rides on the scaffolding plate 3 can easily operate.

  The front left and right support columns 5 are connected by a horizontal crosspiece 9 at the top. A steering shaft support member 10 that rotatably supports the upper portion of the steering shaft 8 is fixed to the horizontal rail 9. The steering shaft 8 includes a lower shaft 8a and an upper shaft 8b that is inserted into and retractable from the lower shaft 8a. The steering shaft 8 is configured to be adjustable in length by a screw 8c in accordance with the installation height position of the scaffold plate 3. A horizontal handle 8d is provided at the upper end of the upper shaft 8b.

  The rear left and right struts 5 are connected by two horizontal cross-function rear crosspieces 11. A push handle 12 extends rearward from the lower portion of each rear column 5. The left and right handwheel handles 12 are connected by a horizontal footrest bar 13, and the footrest bar 13 and the rear side rail 11 provide a step for riding on the scaffolding plate 3 arranged at a high place.

  The front and rear struts 5 are connected to each other by a plurality of horizontal support bars 14 provided at left and right opposing positions with an interval in the vertical direction.

  The scaffold plate 3 includes a frame body 15 made of a groove-type steel material joined in a rectangular frame shape with the groove facing inward, and a rectangular steel plate top plate 16 welded to the upper surface 15a of the upper side of the frame body 15. It has. A handle 17 is attached to the rear surface of the frame 15. The scaffold plate 3 is selectively detachably placed on any one pair of support bars 14 facing left and right.

  The support bar 14 includes a vertical side 14a fixed to the inner side in the left-right direction of each of the front and rear columns 5 with a screw 5b, and a horizontal side 14b extending so as to face the inner side from the lower edge of the vertical side 14a, The opening prevention protrusion 14c which stands | starts up perpendicularly from the inner edge part of the rear part of the said horizontal side 14b, and the edge 14d which connects the vertical side 14a and the horizontal side 14b perpendicularly | vertically in the front-and-back edge part are provided. The end side 14d prevents the scaffold plate 3 from coming off in the front-rear direction.

The lower side 15b of the frame 15 of the scaffolding plate 3 is placed on the horizontal side 14b between the end sides 14d of the support bar 14. The anti- opening protrusion 14 c faces the inner edge of the lower side 15 b, whereby the rear left and right struts 5 are prevented from opening via the scaffold plate 3.

  A number of bolt holes 5 a are formed in the support column 5 at intervals in the vertical direction. The bolt hole 5a at an arbitrary height can be selected, and the support bar 14 can be fixed to the column 5 with the screw 5b.

  The upper end portions of the front and rear columns 5 are connected by a handrail member 18 formed by bending a metal tube material. The handrail member 18 includes a pair of leg portions 18a that are fixed to the upper end portions of the front and rear columns 5 at the lower end portions and extend vertically upward, and a horizontal handrail portion 18b that connects between the upper end portions of the leg portions 18a. It comprises.

  When this work carriage 1 is used, the scaffolding plate 3 is inserted and mounted on the appropriate support bar 14 so as to slide from the rear in accordance with the height position where the work is performed. As shown in FIGS. 6 and 7, the rear portion of the frame 15 of the scaffold plate 3 is fitted between the vertical side 14 a and the engagement side 14 c of the support bar 14. As a result, the frame 15 of the scaffold plate 3 connects the left and right support columns 5 via the support bar 14. For this reason, for example, when the operator gets on the rear part of the scaffolding plate 3 while holding on the handrail 18, even if a load is applied between the left and right support columns 5 in the direction to open the left and right, the space between the left and right support columns 5 remains. It does not open, and the scaffold plate 3 does not fall off the support bar 14 carelessly. When an operator goes up to the scaffolding plate 3, for example, the base 4, the footrest bar 13, and the rear side crosspiece 11 can be sequentially put on the foot. Since there is no rear crosspiece 11 that crosses the path of the worker above the scaffold plate 3, there is no obstacle to boarding.

DESCRIPTION OF SYMBOLS 1 Work trolley 2 Bogie main body 3 Scaffold board 4 Base 5 Strut 6 Steering wheel 7 Driving wheel 8 Steering shaft 8a Lower shaft 8b Upper shaft 8c Screw 8d Handle 9 Front side beam 10 Steering shaft support member 11 Rear side beam 12 Hand handle 13 Footrest bar 14 Support bar 14a Vertical side 14b Horizontal side 14c Unlocking protrusion 14d End side 15 Frame 15a of scaffolding plate Upper side 15b Lower side 16 Top plate 17 Handle 18 Handrail member 19 Battery 20 Drive motor 21 Transmission mechanism

Claims (3)

A cart body having a horizontal base in a plan view and a horizontal base and pillars erected at the four corners of the base, and a plan view general rectangle horizontally supported by the support of the cart body so that the height position can be changed. A scaffolding board,
The carriage main body further includes a pair of steering wheels provided on the left and right in front of the base, a pair of drive wheels provided on the left and right in the rear of the base, and a length-adjustable stand at the front center of the base. A steering shaft provided,
The front left and right support columns are connected by a horizontal horizontal rail at the top, and a steering shaft support member that rotatably supports the upper portion of the steering shaft is fixed to the horizontal rail.
The rear left and right support posts are connected by at least one horizontal step-and-use rear crosspiece, a push handle extends backward from the bottom of each support post, and the left and right hand push handles are connected by a horizontal footrest bar The footrest bar and the rear crosspiece provide a step for boarding on the scaffolding plate arranged at a high place,
The front and rear support columns are connected to each other by a plurality of horizontal support bars provided at left and right facing positions with an interval in the vertical direction,
The scaffold plate includes a frame body made of a grooved steel material joined in a rectangular frame shape with the groove facing inward, and a top plate made of a rectangular steel plate welded to the upper surface of the upper side of the frame body, Is selectively detachably placed on any one of the pair of support bars facing each other,
The support bar includes a vertical side screwed to the inner side in the left-right direction of the front and rear columns, a horizontal side extending inward from the lower edge of the vertical side, and a rear part of the horizontal side. An anti-protrusion piece that stands vertically from the inner edge, and an end that vertically connects the vertical side and the horizontal side at the front and rear ends to prevent the scaffold plate from coming off in the front-rear direction,
The lower side of the frame body of the scaffolding plate is placed on the horizontal side between the ends of the support bar, and the opening protrusions face the inner edge of the lower side. A work cart characterized by being prevented from opening through a scaffolding plate.   A plurality of bolt holes are formed in the support column at intervals in the vertical direction, and a bolt hole at an arbitrary height position is selected, and the support beam is configured to be screwed to the support column. The work cart according to claim 1.   The upper end portions of the front and rear columns are connected by a handrail member formed by bending a metal tube, and the handrail members are fixed to the upper end portions of the front and rear columns at the lower end portion and extend vertically upward. The work cart according to claim 1, further comprising a pair of leg portions and a horizontal handrail portion that connects between upper end portions of the leg portions.

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