JP6465841B2 - Work cart - Google Patents

Description

  The present invention relates to a work carriage that provides a work platform for performing work 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.
Since it travels on the ground, it cannot cope with orbital travel.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a work cart that is easy to operate, can be obtained at low cost, and is capable of running on a track, using a simple manual lifting means without using a 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 main body 2 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 length adjustment at the front center of the base. And a steering shaft 8 which is erected freely. The steering wheel 6 includes a front ground wheel 31 that travels on the ground and a front track wheel 32 that travels on a track. The drive wheel 7 includes a rear ground wheel 34 that travels on the ground and a rear track wheel 35 that travels on a track. The steering wheel 6 is configured to be fixed in a straight traveling state. The work carriage 1 can travel on the ground with the ground wheels 31 and 34 in a steerable state. A push handle 12 extends rearward from the lower portions of the left and right support columns 5. The hand handle 12 is grasped, the rear part of the carriage main body 2 is lifted, and the work carriage 1 is manually moved on the ground or the track by the steering wheel 6 fixed in a straight line, and the track wheels 32 and 35 are put on the track.
In order to solve the above-mentioned problems, a work carriage 101 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, and the carriage. 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 cart body 2 includes front ground wheels 31 that travel on the ground on the front left and right of the base 4 and front track wheels 32 that travel on the track, and front track wheels on the rear left and right of the base 4, respectively. A rear track wheel 35 that travels along the track together with 32 is provided. A push handle 12 extends rearward from the lower part of the left and right support columns 5. The hand handle 12 is held, the rear part of the cart body 2 is lifted, and the work cart 1 is manually moved on the ground or the track by the front ground wheel 31 or the front track wheel 32.

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. On the ground, the work carriage 1 can be moved by steering by operating the steering shaft 8, but the turning radius of the direction change is relatively large. If the push handle 12 is grasped, the rear part of the cart body 2 is lifted, and the work cart 1 is run only by the front grounding wheel 31, it can be freely moved in any direction by making a small turn on the ground. By this operation, the orbital wheels 32 and 35 can be easily put on the orbit. In addition, the overall configuration is relatively simple and can be provided at low cost.
The work carriage 101 of the present invention has no steering mechanism and uses a straight traveling on a track as a basic form of use. However, there is an advantage that the structure can be provided more simply and inexpensively. In use, it is necessary to travel on the ground. In this case, the hand handle 12 is grasped, the rear part of the carriage body 2 is lifted, and the work carriage 101 is caused to travel only by the grounding wheel 31 in front. Can be moved to a place. Since the ground wheel 31 is only forward, it contributes to cost reduction. The effect of providing the ground wheel 31 only in front is great.

It is the perspective view seen from the front of the work trolley concerning the present invention. It is the perspective view seen from the back of the work trolley | bogie of FIG. It is a front view of a part of the work carriage of FIG. It is a one part perspective view of the work trolley | bogie of FIG. It is the perspective view which notched a part of scaffolding board in the work trolley | bogie of FIG. It is a one part perspective view of the work trolley | bogie of FIG. FIG. 2 is a plan view of a part of the work cart in FIG. 1. It is VIII-VIII sectional drawing in FIG. It is a perspective view of the work trolley | bogie of other embodiment.

Embodiments of the present invention will be described with reference to the drawings.
1 and 2, 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.

The steering wheel 6 includes a front ground wheel 31 that travels on the ground and a front track wheel 32 that travels on a track. Both wheels 31 and 32 are rotatably supported on the front axle 33, respectively. The front ground wheel 31 travels on a track for traveling on the ground, and the front track wheel 32 travels on a track R laid on the ground.
Similarly, the drive wheel 7 includes a rear ground wheel 34 that travels on the ground and a rear track wheel 35 that travels on a track. Both wheels 34 and 35 are fixed on a drive axle 36, respectively.
Each of the ground wheels 31 and 34 has a slightly larger diameter than the track wheels 32 and 35.

  A battery 19 is attached to the front part of the base 4, and a drive motor 20 and a transmission mechanism 21 are provided in the lower rear part. The rotation of the motor 20 is transmitted to the drive wheel 7 via the transmission mechanism 21 and the drive axle 36. 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.

  As shown in FIG. 1, the front left and right support columns 5 are connected by a horizontal crosspiece 9 at the top. A 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 shaft cylinder 8a that is fixed to the front axle 33 at a lower end, and a shaft body 8b that is inserted into the shaft 8a so as to be movable up and down. The height of the shaft main body 8b is changed in accordance with the installation height position of the scaffold plate 3, and it can be fixed with bolts 8c. A horizontal handle 8d is provided at the upper end of the shaft body 8b. The steering shaft 8 is supported by the support frame 37 together with the front axle 33 so as to be rotatable about the axis.

  As shown in FIGS. 3 and 4, the support frame 37 includes a support plate portion 37 a that extends horizontally forward. The support plate portion 37a has a pin hole 7b. On the other hand, from the front axle 33, a receiving plate portion 33a facing the support plate portion 37a extends. The receiving plate portion 33a includes a pin receiving cylinder 33b that matches the pin hole 37b when the front axle 33 is in the straight traveling position. When the stopper pin 38 is inserted into the pin receiving cylinder 33b through the pin hole 37b, the steering shaft 8 is fixed to the support frame 37 together with the front axle 33 at the straight traveling position. When the work carriage 1 is caused to travel on the track R by the track wheels 32 and 35, the steering wheel 6 is fixed in the straight traveling direction by the stopper pin 38. When this is driven on the ground by the ground wheels 31 and 34, the stopper pin 38 is removed to free the steering wheel 6.

  As shown in FIG. 2, the rear left and right support columns 5 are connected by two horizontal step-use 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.

  As shown in FIG. 5, 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 welded to the upper surface of the upper side 15 a of the frame body 15. And a top plate 16 made of metal. 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.

  As shown in FIGS. 6 to 8, the support bar 14 is opposed to the inner side from the lower edge of the vertical side 14a and the vertical side 14a fixed by screws 5b on the inner sides of the front and rear columns 5 in the left-right direction. The horizontal side 14b extending in this manner, the unfolding protrusion 14c standing upright from the inner edge of the rear side of the horizontal side 14b, and the vertical side 14a and the horizontal side 14b are vertically connected at the front and rear ends. And an end side 14d. 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 scaffold plate 3 is placed on the horizontal side 14b between the front and rear end sides 14d of the support bar 14. Engagement protrusions 14 c face the inner edge of the lower side 15 b, thereby preventing the rear left and right struts 5 from opening through 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 horizontal handrail portion 18b and a pair of leg portions 18a extending vertically downward from both ends thereof, and at the lower end portions of the leg portions 18a, the upper end portions of the front and rear columns 5 respectively. Secured with screws.

  When this work carriage 1 is used, the scaffolding plate 3 is inserted and mounted so as to be slid from the rear on an appropriate support bar 14 in accordance with the height position at which the work is performed. As shown in FIGS. 7 and 8, 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.

  When the work carriage 1 is used on the ground, it is driven by the ground wheels 31 and 34 and is steered by the handle 8d. When the work carriage 1 is put on the track R or turned slightly, the stopper pin 38 is inserted into the pin hole 37b and the pin receiving cylinder 33b, the front axle 33 is fixed at the straight traveling position, and the hand handle 12 is held. Lift and operate the rear part. Since the turning radius when turning the work cart 1 by steering with the steering handle 8d is limited, when the work cart 1 is to be freely turned with a smaller turning radius, the hand handle 12 is held and the rear part is moved. It is effective to lift and operate.

A work carriage 101 according to another embodiment shown in FIG. 9 is dedicated to track running and is not provided with a steering mechanism, and the rear drive wheel is composed only of a grooved track wheel 35 that runs on the track R. Except for this point, the configuration is the same as that of the work cart 1 of the previous embodiment shown in FIGS. Therefore, in FIG. 9, the same code | symbol is attached | subjected to the component equivalent to previous embodiment, and description is abbreviate | omitted.
In the work cart 101 of this embodiment, the front axle 33 is fixed in the straight traveling direction. A front ground wheel 31 that travels on the ground and a front track wheel 32 that travels on the track R are rotatably supported on the left and right sides of the front axle 33. Only the rear track wheel 35 is fixed to the left and right of the rear drive axle 36. The rear track wheel 35 corresponds to the front track wheel 32.

  The work carriage 101 of this embodiment basically performs only straight travel on the track R in the front-rear direction. Since there is no steering mechanism, the structure is simple and can be provided at low cost. When moving the work cart 101 on the ground, such as when moving the work cart 101 from the storage location to the track installation location, the rear handle wheel 35 is lifted by grasping the handwheel handle 12 and the rear track wheel 35 is lifted, and the front grounding The vehicle is driven only by the wheels 31. According to this operation, the work cart 101 can be freely turned on the ground without a steering mechanism. This is the effect of providing the grounding wheel 31 only in the front.

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 projection piece 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 31 Front grounding wheel 32 Front Track Wheel 33 Front Axle 33a Back Plate 33b Pin Cylinder 34 Rear Ground Wheel 35 Rear Track Wheel 36 Drive Axle 37 Support Frame 37a Support Plate 37b Pin Hole 38 Stopper Pin R Track

Claims (2)

A cart body having a rectangular base in plan view and a horizontal base and pillars erected at the four front , rear, left and right corners of the base, and a plane horizontally supported by the pillar of the cart body so that the height position can be changed. A generally rectangular scaffolding plate,
Between the right and left support columns at the rear, it is connected by at least one horizontal step-and-use rear crosspiece,
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 inside in the left-right direction of the front and rear columns, a horizontal side extending from the lower edge of the vertical side so as to face each other, and an inner edge of the horizontal side An anti-protrusion piece that stands vertically from the portion, and an end side that vertically connects the vertical side and the horizontal side at the front and rear ends and prevents the scaffold plate from coming off in the front-rear direction,
When the lower side of the frame body of the scaffolding plate is placed on the horizontal side between the end sides of the support bar, the unfolding protrusions face the inner edge of the lower side and the scaffolding plate is between the left and right columns. Configured to be prevented from opening through
The carriage main body further includes a front ground wheel that travels straight forward and backward on the ground, and a front track wheel that travels straight forward and backward on the track on the left and right of the front of the base, respectively, and the rear of the base The left and right sides of the vehicle are each supported by a drive shaft and each has a rear track wheel that travels straight forward and backward along the track together with the front track wheel.
The front ground wheel and the front track wheel are supported coaxially, and the front ground wheel is configured to have a larger diameter than the front track wheel,
A work cart further comprising a push handle extending rearward from the lower portions of the left and right support columns so that the rear portion of the cart body is lifted and manually moved on the ground by the front ground wheel . A cart body having a rectangular base in plan view and a horizontal base and pillars erected at the four front , rear, left and right corners of the base, and a plane horizontally supported by the pillar of the cart body so that the height position can be changed. A generally rectangular scaffolding plate,
Between the right and left support columns at the rear, it is connected by at least one horizontal step-and-use rear crosspiece,
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 inside in the left-right direction of the front and rear columns, a horizontal side extending from the lower edge of the vertical side so as to face each other, and an inner edge of the horizontal side An anti-protrusion piece that stands vertically from the portion, and an end side that vertically connects the vertical side and the horizontal side at the front and rear ends and prevents the scaffold plate from coming off in the front-rear direction,
When the lower side of the frame body of the scaffolding plate is placed on the horizontal side between the end sides of the support bar, the unfolding protrusions face the inner edge of the lower side and the scaffolding plate is between the left and right columns. Configured to be prevented from opening through
The bogie main body has 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,
Each of the steering wheels includes a front ground wheel that travels on the ground and a front track wheel that travels on a track,
Each of the drive wheels comprises a rear ground wheel that travels on the ground and a rear track wheel that travels on a track,
The front ground wheel and the front track wheel are rotatably supported on a front axle, and the front ground wheel is configured to have a larger diameter than the front track wheel,
The steering wheel is configured to be fixed in a straight traveling state by a restraining member ,
The restraining member includes a support plate portion having a pin hole provided so as to extend forward from the cart body, and a receiving plate portion extending forward from the front axle so as to face the support plate portion in parallel. A pin receiving cylinder that is erected on the receiving plate portion at a position that matches the pin hole when the front axle is in a rectilinear position; and a stopper pin that is inserted through the pin hole and can be inserted into and removed from the pin receiving cylinder. Comprising
A push handle extending rearward from the lower portions of the left and right support columns is further provided so that the steering wheel fixed to the straight traveling state by lifting the rear portion of the carriage main body can be moved manually on the ground or on the track. A work cart characterized by

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