JP2012046119A - Side guard of electric carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric carriage having a form that achieves smooth traveling and smooth steering and prevents both of an electric carriage and an obstacle put on a road surface or a floor surface or the like from being damaged even if the carriage is in contact with the obstacle since an electric carriage is configured to allow loading/unloading of a carrying object while traveling on a floor surface or a passage surface or the like of a warehouse or a factory or the like.SOLUTION: A side guard of an electric carriage has the following configuration. Driving wheels 1 are configured to be driven by an electric motor M. An undercarriage 3 is configured such that the driving wheels and freely-steerable caster wheels 2 are arranged in the front and rear. A guard board 4 mounted along the lateral-outside part of the same via a pair of front/rear swing links 5, 6. is made of a thin-plate material having proper elasticity and rigidity and is formed to be long in the front and rear direction. The lower edge of the guard board 4 is brought close to the traveling floor surface so as to cover the outer side-face part over an area from the driving wheels 1 to the caster wheels 2 respectively at the front and rear. It is configured to restrict the forward/backward movement of the guard board 4 with respect to the undercarriage 3. The front end part and the rear end part are provided so as to be vertically oscillatable.

Description

  The present invention relates to a side guard for an electric cart that carries materials, articles, etc., even if the cart is in direct contact with a road surface or floor surface during travel or in contact with an obstacle, the cart itself The purpose of this is to make it easier to steer by running gently so as not to damage the floor and obstacles, and to prevent human feet from entering the wheel passing position.

  A transport vehicle (Patent Document 1) that travels by driving a pair of left and right drive wheels separately by each motor, and a technique (Patent Document 2) that packages a motor, a drive wheel, a transmission unit, and the like integrally are known. Yes.

JP-A-9-109894 Japanese Patent Laid-Open No. 2001-18805

  Electric carts are used for loading and unloading goods while traveling on floors, passages, etc. in warehouses, factories, etc., so traveling and steering are smooth. It is desirable that the cart or the obstacle is not damaged even if it touches the obstacle placed on the floor or the like. It is also desirable to prevent a dangerous situation in which a foot gets into the wheel passing range when loading and unloading luggage.

  The invention according to claim 1 has appropriate elasticity and rigidity along the lateral outer side portion of the chassis 3 in which the driving wheel 1 driven by the electric motor M and the steerable caster wheel 2 are arranged in the front and rear. A guard board 4 made of a thin plate and formed long in the front-rear direction is attached via a pair of front and rear swing links 5, 6 so that the lower edge of the guard board 4 approaches the traveling floor surface. In addition to covering the outer surface portion extending from the driving wheel 1 to the caster wheel 2, the front and rear end portions of the guard board 4 are provided so as to be swingable in the vertical direction by restricting the movement of the guard board 4 with respect to the chassis 3. It is set as the structure of the side guard of the electric trolley | bogie characterized by the above.

  The electric carriage travels by rotating the driving wheel 1 by the electric motor M. The steering is performed by a steering operation, a steering operation for turning on and off the driving interlocking of the driving wheel 1, and the like. In such traveling of the carriage 3, when the guard board 4 positioned on the lateral outer surface of the carriage 3 comes into contact with an obstacle adjacent to the traveling passage surface, the caster shaft 2 is subjected to contact steering by the guard board 4. Then, the traveling direction is guided to the target direction. At this time, since the guard board 4 has an appropriate elasticity, an impact force is absorbed in contact with the obstacle, and the caster wheel 2 is not steered and swings suddenly, and is buffered and smoothly smoothed. Make a good steering. The guard board 4 is a pair of front and rear swing links 5 that suspend the guard board 4 in a traveling state where the guard board 4 rides on an obstacle on the floor surface or travels over the obstacle. 6, the front end portion or the rear end portion of the guard board 4 is pushed up or down, and the lower end edge of the guard board 4 is lightly brought into sliding contact with the upper surface of a boarding obstacle or the like. Run. When the lower edge portion of the guard board 4 is in sliding contact with the upper surface of an obstacle or a convex portion of the road surface, even if steering is performed by the caster wheel 2 or the like, the steering resistance at this time is the guard board. It is absorbed by the elasticity of 4, and steers and travels so as not to damage both the guard board 4 itself and obstacles. Furthermore, when loading / unloading a load, an operator does not put his / her feet within the passing range of the wheel 1 or the caster wheel 2.

  According to the second aspect of the present invention, the pair of front and rear swing links 5 and 6 that swing by swinging the front and rear end portions of the guard board 4 are formed in a reverse C-shape and the members on the chassis 3 side are arranged. The front and rear end portions of the guard board 4 are swung in the vertical direction while being supported by the pivot shafts 7 and 8 at the front and rear positions.

  As described above, the guard board 4 is rocked via the rocking links 5 and 6 by climbing an obstacle or the like while the carriage is running. The rocking of the guard board 4 is restricted mainly in the vertical direction by restricting the movement in the front-rear direction. In particular, the front end portion of the guard board 4 touches an obstacle on the floor surface so as to be scooped up. Then, the front end portion of the guard board 4 is quickly pushed up and rotated upward. Further, at this time, even if the rear end portion of the guard board 4 is moved downward in the rear side, the rotational movement is small, and therefore the lowering is small. Then, when the push-up position of the guard board 4 due to this obstacle moves to the rear end as the chassis 3 travels, the front end of the guard board 4 descends and pivots forward, and the rear end quickly moves. To the front upper position. Such a vertical swing of the front end portion or the rear end portion of the guard board 4 is performed separately to prevent a swing lock phenomenon in which the upward swing motion is stopped at the lowest lowered position, and smooth. Causes vertical swing.

According to a third aspect of the present invention, the pair of front and rear rocking links 5 and 6 are regulated by locking the lower limit position of the vertical rocking by a stopper bolt 9 that can be adjusted to be extended from the chassis 3 side member. It is characterized by doing.
The pair of front and rear swing links 5 and 6 are in a state where the guard board 4 is suspended, but the lowering position is locked by the stopper bolt 9 to restrict the lower limit range of the vertical swing of the guard board 4. By adjusting the bottom edge position of the guard board 4 according to the state or form of the traveling floor surface, traveling road surface, etc. of this carriage, the height interval with the traveling floor surface is adjusted, the step of the traveling floor surface, Make it easy to get over obstacles.

In the invention according to claim 4, the pair of front and rear swing links 5, 6 that suspend the front and rear ends of the guard board 4 are elastically urged toward the front and rear opposing sides by the springs 10, 11. The lower pivot pins 12 and 13 at the lower end are fitted and supported in the longitudinal holes 14 and 15 formed in the front and rear ends of the guard board 4.
As described above, when the guard board 4 travels and propels so as to get over the traveling floor surface or an obstacle placed on the traveling floor surface, the front and rear swing links 5 and 6 are connected to the springs 10 and 11. The front end portion or the rear end portion of the guard board 4 is swung up and down while being pushed up and turned against the lower end of the guard board 4 so that the lower end edge of the guard board 4 is always pressed against the traveling floor side. The guard posture of the guard board 4 is stabilized by reducing idling and free movement.

According to a fifth aspect of the present invention, the guard board 4 is formed by attaching a lower edge board 41 having soft and weak elasticity to a base board 40 having relatively large rigidity connected between the pair of front and rear swing links 5 and 6. It is characterized by comprising.
The guard board 4 having the cart guard function as described above includes a base board 40 connected between a pair of front and rear swing links 5 and 6 mainly having rigidity, and a lower edge board having relatively soft and weak elasticity. 41, the guard effect as the guard board 4 is demonstrated by making the outer side surface of this lower edge board 41, a lower end edge, etc. slide-contact with an obstruction.

According to the first aspect of the present invention, since the guard board 4 can be swung only substantially in the vertical direction without substantially swinging in the left-right direction or the front-back direction, In addition, when touching the outer surface, direct contact with or collision with the drive wheel 1, caster wheel 2 and chassis 3 is prevented, and the impact force is absorbed and relaxed to ensure safety. Can do. Even if the front end of the guard board 4 comes into contact with an obstacle on the floor surface while the carriage is running, the obstacle board smoothly moves over the obstacle by the upward movement of the front end of the guard board 4. Both obstacles are less likely to be damaged, gently protect the bogie travel, and stabilize steering and operability smoothly.
Further, since the lower edge of the guard board 4 is brought close to the traveling floor surface and the outer surface portion extending from the front and rear drive wheels 1 to the caster wheels 2 is covered, the operator who loads and unloads the load wheels 1 and 2 It is possible to prevent an accident such as a foot being stepped on without passing a foot within the passing range.

  In the invention according to the second aspect, the guard board 4 is suspended by the reverse C-shaped form of the pair of front and rear swing links 5, 6. Since it is configured to swing in the vertical direction, the configuration is simple, and the front and rear ends of the guard board 4 move up and down, and the obstacles are smoothly moved while tilting in the front-rear direction. You can get over. When the front end of the guard board 4 hits an obstacle on the floor surface, the guard board 4 is pushed to the rear side, and the front end is greatly raised by the swinging links 5 and 6, and the guard board 4 moves up and down. In addition, since the swinging posture is downward and the swinging at the lower fulcrum position is smoothly performed without being fixed, the obstacles can be easily and easily climbed over.

  The invention according to claim 3 is that the lower limit position of the swing links 5 and 6 that suspend the front and rear ends of the guard board 4 is adjusted by adjusting the stopper bolt 9, so that the adjustment operation configuration is simple. It is easy, and by adjusting the height interval to a form that is easy to travel according to the traveling state, traveling location, transport object, etc., it is possible to improve operability and maintain safe traveling in a wide work area.

  According to a fourth aspect of the present invention, since the rocking links 5 and 6 that suspend the front and rear end portions of the guard board 4 are elastically biased downward by the springs 10 and 11, 4 is less likely to cause idle rocking, rattling or play due to running rocking or vibration of the bogie, and smooth steering with a stable guard posture while constantly absorbing the resistance received by the guard board 4 Maintain operability and operability.

  Since the guard board 4 has a form in which the lower edge board 41 is attached to the lower part of the base board 40, the guard board 4 can be used depending on the hardness, softness, etc. of the constituent materials of the boards 40, 41. The guard board 4 having softness and elasticity that is easy to adapt can be easily configured. Further, the lower edge of the lower edge board 41 is scooped up by an obstacle and is easily subjected to sliding resistance and easily damaged by wear. However, only the lower edge board 41 is replaced with the base board 40. Can be configured, simple and inexpensive.

The side view of an electric trolley | bogie. The plan view. The side view of the chassis part. The front view of the caster wheel part. The rear view of the handle part. The back sectional view and side sectional view of the handle part. The top view and side sectional view of a drive wheel interlocking | linkage part. The side view which shows the operation process (A)-(E) of a guard board. The side view at the time of changing the handle to the front side.

  Based on the drawings, the electric cart is provided with a cargo loading platform 50 above the chassis 3, a pair of left and right caster wheels 2 are arranged at the front of the chassis 3, and a pair of left and right drive wheels 1 are mounted on the rear. Then, the drive wheel 1 can be driven forward and backward by each electric motor M to drive forward and backward, and steer. A handle bracket 17 is provided at the front and rear ends of the chassis 3 so that the handle post 16 can be attached and detached. In this configuration, the load cell 19 detects an operation distortion, a distortion direction, and the like, and controls the electric motor M from the controller while driving the left and right driving wheels 1 to drive and steer. The handle post 16 can be changed to the front bracket 17 (see FIG. 9).

  An axle housing 21 that rotatably supports the axle 20 of the wheel 1 at both right and left ends is attached to the rear end portion of the chassis 3 by mounting brackets 22. The front and rear sides of the axle housing 21 are provided with electric motors M capable of forward / reverse rotation, and the left and right axles 20 are driven in conjunction with the chain 23 by each motor M. When the left and right handle grips 18 are gripped by the opposite hand and pushed forward, the left and right drive wheels 1 are rotated forward by the distortion of the load cell 19 to travel forward. When pulled rearward, the left and right drive wheels 1 are reversely rotated to travel backward. For example, when steering or turning to the left side, the right handle grip 18 is pushed, or the left handle grip 18 is pulled and simultaneously the right handle grip 18 is pushed to operate the left drive wheel 1. By driving the right driving wheel 1 forward and rotationally while not driving or rotating backward, it is possible to perform a sudden turn or a slow turn.

  The load cell 19 for performing the assist operation by the handle grip 18 is disposed on both the left and right sides of the bar handle 24, and the outer peripheral portions thereof are covered with the handle cover 25, and the handle grip 18 on the left and right outer portions. It can be exposed only and the driver can hold it with his left hand and right hand and push and pull it lightly. An operation hole 26 into which a finger can be inserted is formed on one side of the handle cover 25, and a brake release switch 27 for releasing the electromagnetic brake 28 is provided inside the handle cover 25. In movement, etc., when the electromagnetic brake 28 is released and the handle post 16 is pushed and moved by hand, the brake release switch 27 in the operation hole 26 is pushed with some fingertips while pushing the handle post 16. The electromagnetic brake 28 can be turned on and off by pushing. Further, since this brake release switch is hidden in the handle cover 25, when the steering wheel grip 18 portion on the outer end is gripped for running, steering operation, etc., the fingertip is inserted into the operation hole 26. It is difficult and misoperation is difficult.

  The full width A of the bar handle 24 including the handle grips 18 on both the left and right side portions is set to be approximately the same as the shoulder width of the operator so that it can be easily operated in a natural posture. Further, on the front side of the handle cover 25, there are arranged a key switch 29 for turning the power on and off, a lift switch 30 for raising and lowering the loading platform 50 on the chassis 3, and the like. The lift switch 30 is arranged in a remote area from the thumb of the hand holding the handle grip 18 and the range line B where the index finger reaches, so as not to be erroneously operated during the traveling operation.

  At the front left and right outer sides of the chassis 3, caster wheels 2 that can be rotated around a vertical caster shaft 32 are provided on the lower side of the caster bracket 31. A four-wheel running mode with driving wheels 1 is adopted. A battery base 34 that supports the battery 33 is provided on the abdomen of the chassis 3.

  Guard boards 4 are attached to the left and right sides of the chassis 3. A rear arm 36 having a round bar formed in a crank shape is provided on the rear end outer portion of the chassis 3 so as to project from the rear position of the drive wheel 1, and the caster bracket 31 extends outward from the caster bracket 31. A protruding front arm 35 is provided to form the pivot shafts 7 and 8. A guard board 4 is mounted between the front and rear front arms 35 and the rear arm 36, and the guard board 4 swings up and down via swing links 5 and 6 having a specific form.

  Here, a longitudinal direction is made of a thin plate material having appropriate elasticity and rigidity along a laterally outer side portion of a chassis 3 in which a drive wheel 1 driven by an electric motor M and a steerable caster wheel 2 are arranged in the front and rear. A guard board 4 that is formed long is attached via a pair of front and rear swing links 5 and 6 so that the lower edge of the guard board 4 is brought close to the traveling floor surface. The motor is characterized in that it covers the outer surface portion over the wheel 2 and restricts the movement of the guard board 4 with respect to the chassis 3 in the front-rear direction so that the front end portion and the rear end portion can swing in the vertical direction. The structure of the side guard of the cart is used.

  The electric carriage travels by rotating the driving wheel 1 by the electric motor M. The steering is performed by a steering operation, a steering operation for turning on and off the driving interlocking of the driving wheel 1, and the like. In such traveling of the carriage 3, when the guard board 4 positioned on the lateral outer surface of the carriage 3 comes into contact with the obstacle W adjacent to the traveling path surface C, the caster shaft 2 is contacted by the guard board 4. It is steered to guide the traveling direction to the target direction. At this time, since the guard board 4 has appropriate elasticity, the impact force is absorbed in contact with the obstacle W, and the caster wheel 2 is not subjected to abrupt steering and swinging. Make smooth steering. In addition, when the guard board 4 travels over an obstacle W or the like on the floor surface C or travels over the obstacle W, a pair of front and rear swings holding the guard board 4 is suspended. The front end 37 or the rear end 38 of the guard board 4 is pushed up or down by the links 5 and 6 so that the lower end edge 39 of the guard board 4 is placed on the upper surface of the boarding obstacle W or the like. The vehicle travels in a light sliding contact (see FIG. 8). When the lower edge portion 39 of the guard board 4 is in sliding contact with the upper surface of the obstacle W or the convex portion of the road surface C (B) to (D), even if steering by the caster wheel 2 or the like is performed. The steering resistance at this time is absorbed by the elasticity of the guard board 4 and steers and travels so as not to damage both the guard board 4 itself and the obstacle W.

  Further, the pair of front and rear swing links 5 and 6 that swing by swinging the front and rear ends of the guard board 4 are formed in an inverted C-shape so that the pivot shaft 7 at the front and rear positions of the member on the chassis 3 side is formed. , 8 and swinging the front and rear end portions of the guard board 4 in the vertical direction.

  As described above, when the guard board 4 rides on the obstacle W or the like while the carriage is running, the guard board 4 is swung via the swing links 5 and 6. The guard board 4 is swung mainly in the vertical direction with the movement in the front-rear direction being restricted. In particular, the front end portion 37 of the guard board 4 is in contact with the obstacle W on the floor C. When it is raised (B), the front end portion 37 of the guard board 4 is quickly pushed up and rotated upward. At this time, even if the rear end portion 38 of the guard board 4 is moved rearward and downward, this rotational movement is small, and therefore the lowering is also small. Then, when the push-up position of the guard board 4 by the obstacle W moves to the rear end 38 as the chassis 3 travels (D), the front end 37 of the guard board 4 descends and pivots forward. The rear end portion 38 is quickly pushed up to the front upper position. Such a vertical swing of the front end portion 37 or the rear end portion 38 of the guard board 4 is performed separately to prevent a rocking lock phenomenon that the upward swing is stopped at the lowest position, Smooth up and down swing.

Further, the pair of front and rear swing links 5 and 6 is characterized in that the lower limit position of the vertical swing is locked and restricted by a stopper bolt 9 that can be adjusted to be placed on the chassis 3 side member.
The pair of front and rear swing links 5 and 6 are in a state where the guard board 4 is suspended, but the lowering position is locked by the stopper bolt 9 to restrict the lower limit range of the vertical swing of the guard board 4. The bottom edge position of the guard board 4 is adjusted according to the state or form of the traveling floor surface of the carriage, the traveling road surface C, etc., and the height interval with the traveling floor surface C is adjusted. This makes it easy to get over and over the part or obstacle W.

Further, a pair of front and rear swing links 5 and 6 for suspending the front and rear ends of the guard board 4 are elastically urged toward the front and rear opposing sides by springs 10 and 11, and a lower pivot pin at the lower end portion. 12 and 13 are fitted and supported in the longitudinal holes 14 and 15 formed in the front and rear ends of the guard board 4.
As described above, when the guard board 4 travels over the traveling floor surface or the obstacle W placed on the traveling floor surface C, the front and rear swing links 5 and 6 are connected to the spring 10. , 11, the front end portion 37 or the rear end portion 38 of the guard board 4 is swung up and down while being pushed up and rotated, and the lower end edge 39 of the guard board 4 is always pressed against the traveling floor C side. Since the rocking is performed in a state, the guard posture of the guard board 4 is stabilized by reducing idle rocking and play.

Further, the guard board 4 is configured by attaching a lower edge board 41 having a soft and weak elasticity to a base board 40 having a relatively high rigidity connected between a pair of front and rear swing links 5 and 6. To do.
The guard board 4 having the cart guard function as described above includes a base board 40 connected between a pair of front and rear swing links 5 and 6 mainly having rigidity, and a lower edge board having relatively soft and weak elasticity. 41, the guard effect as the guard board 4 is exhibited by bringing the outer side surface of the lower edge board 41, the lower end edge 39, etc. into sliding contact with the obstacle W or the like.

  The pair of front and rear rocking links 5 and 6 are suspended so that they can swing back and forth by fitting the collars formed at the upper ends to the pivot shafts 7 and 8 formed at the front arm 35 and the rear arm 36, respectively. . Each of the front arm 35 and the rear arm 36 is made of a sheet metal and is bent in a crank shape to form the pivot pins 12 and 13 at the lower end portion. The pivot pins 12 and 13 are connected to the front and rear of the base board 40. The long holes 14 and 15 formed at the end are fitted so as to be slidable back and forth. The pair of front and rear rocking links 5 and 6 are elastically provided by the springs 10 and 11 so as to rotate to the opposite sides of the front and rear, and the distance between the pair of front and rear pivot pins 12 and 13 at the lower end portion. However, the pair of front and rear rocking links 5 and 6 are formed in an upside-down inverted H-shape so that the guard board 4 is suspended so that it is appropriately narrower than the distance between the pivot shafts 7 and 8 at the upper end. Constitute. The reverse link-shaped swing links 5 and 6 are formed at the lower limit swing position of the guard board 4, and the lower limit swing position can be adjusted up and down by the front arm 35 and the rear arm 36. The stopper bolt 9 provided can be locked.

  The base board 40 suspended from the rocking links 5 and 6 is made of sheet metal and has an appropriate rigidity over the entire length. A synthetic resin (PP material T: 1.8) lower edge board 41 is attached to the lower portion of the base board 40 by bolting or the like, and the lower edge of the lower edge board 41 is protruded downward. The front and rear end portions of the lower edge board 41 are bent toward the inside of the chassis 3 to form front end guide pieces 37 and 38, and the lower end edge 39 is formed in a front and rear horizontal shape between substantially the wheel bases. The front edge side from 2 and the rear edge side from the drive wheel 1 are set to inclined edges 42 and 43 that form an upward inclination angle so that the obstacle W located on the traveling road surface or the floor surface C is easily climbed over. Yes. In order to change and adjust the height position of the lower edge 39 of the lower edge board 41 with respect to the traveling road surface C, the mounting position of the lower edge board 41 with respect to the base board 40 can be changed. Further, as described above, the front end portion 37 of the guard board 4 protrudes forward from the caster wheel 2, and the rear end portion 38 protrudes rearward from the driving wheel 1, and the front end portion 37 and the rear end portion 38 are projected. In the form of swinging up and down so as to approach the traveling floor C, the guard board is formed by forming the inclined edges 42 and 43 at the lower end edge 39 of the front end portion 37 and the rear end portion 38. 4 can be set or adjusted so that the lower end edge 39 of the 4 is closer to the traveling floor surface C.

DESCRIPTION OF SYMBOLS 1 Drive wheel 2 Caster wheel 3 Chassis 4 Guard board 5 Swing link 6 Swing link 7 Pivot shaft 8 Pivot shaft 9 Stopper bolt 10 Spring 11 Spring 12 Pivot pin 13 Pivot pin 14 Elongated hole 15 Elongated hole 40 Base Board 41 Lower edge board M Electric motor

Claims (5)

  A thin wheel having appropriate elasticity and rigidity along the lateral outer side of a chassis (3) in which a drive wheel (1) driven by an electric motor (M) and a steerable caster wheel (2) are arranged in front and rear. A guard board (4) made of plate material and formed long in the front-rear direction is attached via a pair of front and rear swing links (5), (6), and the lower edge of this guard board (4) approaches the traveling floor surface. The front end portion is covered with the outer surface portion extending from the front and rear drive wheels (1) to the caster wheel (2), and the movement of the guard board (4) relative to the chassis (3) is restricted. And the side guard of the electric trolley | bogie characterized by providing the rear-end part so that rocking | fluctuation to an up-down direction was possible.   A pair of front and rear swing links (5), (6) swinging by hanging the rear end of the front and rear sides of the guard board (4) are formed in a reverse C-shape and the front and rear of the member on the chassis (3) side. The electric cart according to claim 1, wherein the front and rear ends of the guard board (4) are swung in the vertical direction while being supported by the pivot shafts (7), (8) of the position. Side guard.   The pair of front and rear swing links (5) and (6) is controlled by locking the lower limit position of the vertical swing by a stopper bolt (9) that can be adjusted with respect to the chassis (3) side member. The side guard of the electric cart according to claim 1 or 2, characterized by the above-mentioned.   The pair of front and rear swing links (5) and (6) for hanging the front and rear ends of the guard board (4) are elastically biased toward the front and rear opposing sides by springs (10) and (11). The lower pivot pins (12) and (13) at the lower end are fitted and supported in the longitudinal holes (14) and (15) formed in the front and rear ends of the guard board (4). The side board of the electric cart according to claim 1, 2, or 3.   The guard board (4) has a lower edge board (41) having soft and weak elasticity attached to a relatively rigid base board (40) connected between a pair of front and rear swing links (5) and (6). The side guard for an electric carriage according to claim 1, 2, 3, or 4, characterized by comprising:

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