JP2007015512A - Movable truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable truck with excellent maintainability and economic property ensuring an advantage that traveling can be performed in the riding state similarly to a prior part by a drive means using no motor. <P>SOLUTION: The movable truck is provided with a machine body frame provided with a step 5 and comprising a lower frame 2, a side frame 36 and an upper frame 37; a rear wheel 7 and a front wheel 9 rotatably and pivotally supported on the machine body frame; a drive lever 11 for generating motive power by a worker on the step and having one end reciprocably and pivotally supported on the machine body frame; and a manual drive force generation means comprising a clutch mechanism 12 for transmitting the motive power to the wheel only in any one of an advancement direction or a returning direction when the drive lever 11 is reciprocally turned. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a slightly high place where it is difficult for an operator to reach the operator's hand, such as pruning, harvesting, sprouting, pollination, etc. In this work, the present invention relates to the technology of a mobile carriage used for work that frequently requires a relatively short distance.

Traditionally, cropping, harvesting, bud picking, pollination, etc. in the house and on the farm field, etc., where the worker cannot reach or where the worker is difficult to work in a comfortable position When performing, work was done using ladders, stepladders and the like.
However, when the work is performed while appropriately moving the place, the worker moves and raises and lowers the ladder and the stepladder each time, and there is a problem in terms of workability and safety.

As means for solving the above problems, an upper body on which an operator rides and works, a lower body capable of running by driving a drive wheel with a motor, and the upper body can be moved up and down with respect to the lower body 2. Description of the Related Art A moving carriage including a lifting unit that supports the moving carriage is known. For example, as described in Patent Document 1.
JP 2001-354142 A

The moving cart described in Patent Document 1 uses a motor for its driving force, and has the advantage that the operator can travel while on board by operating a switch. On the other hand, the motor and the motor are supplied with electric power. Since it is necessary to mount a battery to be supplied, a control device, and the like, it is expensive and increases in weight. Moreover, since the mileage at the time of continuous use is limited, charging was required before use.
In view of the circumstances as described above, the present invention provides a mobile carriage that is excellent in maintainability and economy while securing the advantage of being able to travel while being on board, as in the prior art, by drive means that does not use a motor. Is.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, an airframe frame provided with steps, wheels rotatably supported on the airframe frame, and manual driving force generating means for generating power by an operator on the steps. It has.

  According to a second aspect of the present invention, the manual drive force generating means includes a drive lever having one end pivotally supported by the body frame so as to be capable of reciprocating rotation, and when the drive lever is reciprocatingly rotated, Only one of them includes a clutch mechanism that transmits power to the wheels.

  According to a third aspect of the present invention, the clutch mechanism includes a ratchet gear fixed to a drive shaft that pivotally supports the drive lever, a substantially central portion pivotally supported by the drive lever, and the ratchet at both ends. A swinging member provided with a claw that engages with a gear tooth; and a switching means that switches the swinging member to switch which one of the claw is engaged with the ratchet gear. To do.

  According to a fourth aspect of the present invention, the switching means includes a switching lever having a substantially central portion pivotally supported by the driving lever so as to be slidable, and slidably supported by the driving lever, and one end pivotally supported by the switching lever. And a link having the other end in contact with the swing member.

  6. The brake member according to claim 5, wherein the brake member moves in a direction in contact with the wheel and in a direction away from the wheel, a spring member that biases the brake member in a direction in which the brake member contacts the wheel, and the brake Brake releasing means for moving the member in a direction away from the wheel.

  In claim 6, a steering shaft erected in the center of the left and right of the steered wheel shaft that supports one side of the front and rear of the wheel, and a member that supports the steering shaft so as to be able to turn left and right at the front of the body frame, A lock bar that protrudes from the steering shaft and is attached, and a lock member that can be engaged with the lock bar.

  According to a seventh aspect of the present invention, the step includes a step plate and a support rail that is fixed to the body frame and the step plate can be attached to different heights.

  According to an eighth aspect of the present invention, an auxiliary shelf can be attached to the machine body frame.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, it is possible to easily run the movable carriage while the operator is on board, regardless of the motor drive. In addition, since there is no battery, charging and battery replacement are not necessary, and it is excellent in maintainability and economy.

  According to the second aspect, the operator can easily generate power by operating the drive lever. Further, the driving force generated by the reciprocating rotation of the driving lever is transmitted to the wheel via the clutch mechanism, so that only the driving force in either the forward direction or the backward direction is transmitted to the wheel, As a result, the carriage can continuously travel in one direction.

  In claim 3, the traveling direction of the movable carriage can be switched, and the workability is excellent.

  According to a fourth aspect of the present invention, since the switching lever is disposed at a position where an operator can operate while riding on the movable carriage, the traveling direction of the movable carriage can be easily switched, and the workability is excellent.

  According to a fifth aspect of the present invention, the brake member and the wheel are always in contact with each other except when the operator operates the brake release lever, and the carriage is prevented from moving due to the braking action by the frictional force. Therefore, it is excellent in workability.

  According to the sixth aspect of the present invention, the steering angle can be held in the straight traveling direction with a simple configuration.

  According to the seventh aspect, the height of the step from the ground can be changed according to the work content, and the workability is excellent.

  According to the eighth aspect of the present invention, it is possible to easily attach a shelf on which a tool or a container for storing a harvested product or a bag or the like for carrying a work is placed, and it can be removed when not needed, which is excellent in workability.

Below, the whole structure of the simplified mobile trolley 1 which is one form of the mobile trolley | bogie of this invention is demonstrated using FIG.1 and FIG.2.
For convenience of explanation, the direction of arrow A in FIG.
1 is a right side view, and FIG. 2 is a front view.

The simple movable carriage 1 is used for work at a slightly high place, and has a rear frame 7, a front wheel 9, and a step 5 on a body frame, and a driving lever 11, a clutch as a manual driving force generating means. A mechanism 12 and the like are provided. The fuselage frame includes a lower frame 2, a side frame 36 and an upper frame 37.
Here, “working at a slightly high place” is not so much as using a ladder or the like, but it is difficult to reach the worker's hand or to work in an easy posture without using a stepladder or the like. It is not limited to pruning, harvesting, sprouting, and pollination of crops in the house or orchard shelf, but in a slightly high place outside the house or in the factory. Installation work, wiring work, and the like.

The lower frame 2 is a structure serving as a foundation of the simplified mobile carriage 1, and wheels are arranged on both the front, rear, left and right sides of the lower frame 2. The lower frame 2 is a member formed by forming a steel pipe into a substantially rectangular shape. Side frames 36, 36, 36, 36 are erected from the left and right of the front and rear portions of the lower frame 2, and the upper ends of the side frames 36, 36, 36, 36 are substantially U-shaped in plan view. An upper frame 37 is fixed in the horizontal direction, and the upper frame 37 closes the front and opens the rear so that the user can get on and off from the rear. The left and right rear ends of the upper frame 37 are bent downward in an L shape in a side view for easy holding. The upper frame 37 is arranged so that it is located near the upper and lower part of the body in the state where the operator is on board, and it serves as a fence to prevent a fall accident when working at a high place, and the operator can easily move It plays the role of a handrail that stabilizes the body when maneuvering the carriage 1. The side frame 36 and the upper frame 37 are also made of steel pipe. In addition, a structural member is not limited to a steel pipe (pipe), What is necessary is just a structural member which can ensure the required rigidity and can endure the load at the time of worker boarding or harvest loading.
Axle brackets 3, 3 are suspended downward from the left and right sides of the lower frame 2, a rear wheel shaft 6 is pivotally supported on the axle brackets 3, 3, and rear wheels serving as driving wheels at both ends of the rear wheel shaft 6. 7 and 7 are fixed, and a driven sprocket 22 is fixed in the middle of the left and right. A support bracket 17 is fixedly provided at the front left and right center of the lower frame 2, and a front wheel 9 described later is supported on the support bracket 17.

  A hand handle 35 is disposed on the rear side frames 36 and 36 so as to protrude rearward, and can be stored by rotating downward when not required. Thus, when the operator moves the simple movable carriage 1 by hand or places it on a loading platform such as a truck, the push handle 35 protrudes backward so that it can be easily held, and is unnecessary during work or storage. Sometimes it is rotated and stored at an angle that is difficult for the operator to touch.

Next, the drive mechanism of the rear wheels 7 and 7 will be described with reference to FIGS.
Support plates 13L and 13R are fixed on both sides of the middle portion of the lower frame 2 so as to protrude downward, and the drive shaft 10 is rotatably supported on the lower portions of the support plates 13L and 13R. A ratchet gear 20 and a drive sprocket 21 are fixed on the drive shaft 10, and the lower end of the drive lever 11 is pivotally supported on the right side of the drive shaft 10.
The right support plate 13R is bent in a reverse L shape when viewed from the rear, and a long hole is opened in the front-rear direction on the upper surface of the support plate 13R, and the lower portion of the drive lever 11 is inserted into the long hole. Thus, the structure is such that the drive lever 11 is guided to rotate back and forth. The upper portion of the drive lever 11 is provided with a grip so as to be positioned above and outside the upper frame 37 so that the drive lever 11 can be operated with one hand (right hand), and the drive lever 11 is configured to be long. By doing so, it can be operated with light force. And the rotation amount of the drive lever 11 is provided in the front-rear center part, so that the rotation amount is substantially the same in the front-rear direction. However, it is also possible to arrange a drive pedal in place of the drive lever 11 and to adopt a stepping type drive configuration. In this case, the body can be supported by one hand, and a large force can be applied, so that traveling drive can be easily performed. As a form of the manual operation unit, a lever is employed in the present embodiment, but a circular handle-like operation unit or the like may be used, and is not limited.
A chain 23 is wound between the driving sprocket 21 and the driven sprocket 22 to transmit the driving force by the driving lever 11 to the rear wheel 7. However, the power transmission mechanism to the rear wheels is not limited to the chain type, and may be a gear type, a belt type, a shaft type, or the like, and is not limited.
As shown in FIG. 3, a swing member 28 is pivotally supported at the lower part of the drive lever 11 so that the front-rear rotation of the ratchet gear 20 can be switched. The swinging member 28 and the ratchet gear 20 form a clutch mechanism 12, and the drive lever 11 is rotated back and forth to move the rear wheel 7 forward or backward via the drive sprocket 21, the driven sprocket 22, the chain 23, or the like. It is configured so that it can be driven by transmitting rotational power to either of them.
Details of the clutch mechanism 12 will be described.
The oscillating member 28 has a substantially triangular shape when viewed from the side, and the front / rear center portion (substantially the center of gravity) of the oscillating member 28 is pivotally supported by the lower portion of the drive lever 11. It is energized by. In other words, the detent mechanism forms an insertion recess in the lower portion of the support 43 fixed to the drive lever 11, and the second spring 44 and the ball 45 serving as elastic bodies are housed in the insertion recess, and the ball 45 is rocked. The moving member 28 is disposed so as to contact the upper surface.
With this configuration, the swinging member 28 is urged by the detent mechanism so that it can be held at the front lowered position, the neutral position, or the rear lowered position.
In addition, the lower halfway part of the switching lever 14 is pivotally supported in the middle part of the drive lever 11 and a grip 14a is formed on the upper part of the switching lever 14 so that the switching operation can be performed. The upper portions of the first switching link 38 and the second switching link 39 are pivotally supported on both front and rear sides of the switching lever 14 via pivot pins, and the lower portions of the first switching link 38 and the second switching link 39 are supported by the support. The both sides of the body 43 are inserted and supported so as to be slidable up and down, and the lower ends of the first switching link 38 and the second switching link 39 are disposed so as to be able to contact the front and rear side upper portions of the swing member 28. Yes.

A first claw 29 having a pin fixed in the left-right direction is provided at the front lower portion of the swing member 28, and a second claw 30 having a pin fixed in the left-right direction is provided at the rear lower portion of the swing member. ing. The ratchet gear 20 is constituted by a sprocket in this embodiment.
In such a configuration, when the switching lever 14 is turned to the forward position, the first switching link 38 on the front side is pushed downward, and the lower end of the first switching link 38 is at the front upper side of the swing member 28. The rocking member 28 contacts and pivots the rocking member 28 clockwise (clockwise) in FIG. 3, and the rocking member 28 is pushed by the detent mechanism at the rear upper part to maintain the front-lowering state. At this time, a slight gap is formed between the lower end of the first switching link 38 and the upper front side of the swing member 28.
When the swinging member 28 is in the forward-lowering state, the first pawl 29 engages with the ratchet gear 20, and the teeth of the ratchet gear 20 are configured in a substantially V shape. The first claw 29 contacts the tooth surface of the ratchet gear 20 in a substantially perpendicular direction when the 11 is rotated forward. However, when the drive lever 11 is rotated rearward, the first claw 29 is the ratchet gear 20. An obtuse angle with respect to the tooth surface.
That is, when the switching lever 14 is rotated forward, when the drive lever 11 is rotated forward, the first pawl 29 is engaged with the ratchet gear 20 to transmit the forward turning power, and the rear via the chain 23 or the like. Power is transmitted to the wheel 7. When the drive lever 11 is rotated backward, the first pawl 29 is not engaged with the ratchet gear 20 and is fed forward. At this time, the swinging member 28 swings when the first claw 29 gets over the upper end of the teeth of the ratchet gear 20, but it is absorbed by the gap between the first switching link 38 and the swinging member 28 and is switched. The swinging member 28 is kept tilted forward by the detent mechanism without rotating 14 or only vibrating slightly.

Further, when the switching lever 14 is turned to the rearward position, the rear second switching link 39 is pushed downward, and the lower end of the second switching link 39 abuts on the rear upper side of the swing member 28. The swinging member 28 is rotated counterclockwise (counterclockwise) in FIG. 3, and the swinging member 28 is pushed in the front upper portion by the detent mechanism, and maintains the rear-lowering state. At this time, there is a slight gap between the lower end of the second switching link 39 and the rear upper surface of the swing member 28.
When the drive lever 11 is rotated rearward, the second pawl 30 is brought into engagement with the tooth surface of the ratchet gear 20 in a substantially perpendicular direction as described above, and the reverse rotation force is applied to the ratchet gear 20. The power can be transmitted to the rear wheel 7 via the chain 23 or the like to move backward. When the drive lever 11 is rotated forward, the second pawl 30 is not engaged with the ratchet gear 20 and is idled.

With this configuration, when the operator rides on the simplified movable carriage 1 and moves forward, when the switching lever 14 is rotated forward and the drive lever 11 is rotated back and forth, the forward rotation is achieved. Only when the power is transmitted to the rear wheel 7, the simplified movable carriage 1 can be moved forward. Conversely, when the vehicle is moved backward, when the switching lever 14 is rotated backward and the drive lever 11 is reciprocally rotated, power is transmitted to the rear wheel 7 and moved backward only when the drive lever 11 is rotated backward. Can do it.
That is, by switching the direction in which the switching lever 14 is tilted, the claw that engages with the ratchet gear 20 is switched to either the first claw 29 or the second claw 30, whereby the traveling direction of the simplified mobile carriage 1 is changed. Can be switched.
In this embodiment, the ratchet is used to move forward or backward, but other one-way clutches can be used to switch forward and backward.

  Further, a concave portion is formed on the top of the swing member 28 so that the ball 45 can be engaged, and the grip 14a of the switching lever 14 can be held in a position parallel to the drive lever 11 (vertical direction). Yes. This position is a neutral position, and both the first claw 29 and the second claw 30 can be held at positions where they do not engage with the ratchet gear 20. In other words, when moving without getting on the simplified movable carriage 1, when the movable lever 1 is pushed forward or backward to move the switching lever 14 in the neutral position of the front and rear, the ratchet gear 20 is rotatable, The ratchet gear 20 and the pawl are engaged to prevent a brake.

Next, the brake device will be described with reference to FIGS. 1, 2, and 4.
The brake device includes a brake release lever 19, a brake pad 46, a brake wire 34 that connects the brake release lever 19 and the brake pad 46, and the like.
The brake pad 46 is made of an elastic body having a large frictional resistance, such as rubber, and a support rod 31 is erected from the center upper surface of the brake pad 46. The support rod 31 is composed of the left lower frame 2 and the rear side frame. The support stays 47 and 47 projecting from the support plate 32 fixed to 36 are supported so as to be vertically slidable.
The first spring 33 is fitted on the support rod 31 between the lower support stay 47 and the brake pad 46 to urge the brake pad 46 downward, and the brake pad 46 is moved to the rear wheel 7. The structure is configured so as to be brought into contact with the upper surface of the lens and to be braked by the frictional force generated by the contact.
One end of a brake wire 34 is locked to the upper end of the support rod 31, and the other end of the brake wire 34 is connected to the brake release lever 19. In addition, the member which connects the support rod 31 and the brake release lever 19 is not limited to a wire, It can also be comprised with a rod, a link, etc. Further, in the present embodiment, only the left rear wheel 7 is braked, but a brake device may be arranged on the right rear wheel to brake both.

The brake release lever 19 is disposed in the vicinity of the handle 18 which will be described later. By grasping the brake release lever 19, the brake pad 46 is lifted up via the brake wire 34 and the support rod 31, and the brake pad 46 and the rear wheel 7. And release the brake action.
Thus, when moving forward or backward, the brake action is released by holding the brake release lever 19 with one hand (left hand), and the drive lever 11 is moved back and forth with the other hand (right hand). be able to. When the brake release lever 19 is released, the brake pad 46 is pressed against the rear wheel 7 by the spring force, the brake is applied, work can be performed, and the workability is excellent.

Next, the details of the handle lock portion serving as means for holding the steering handle 18 and the front wheel 9 in the straight traveling direction will be described with reference to FIGS. 1, 2, 5, and 6.
The handle lock part is arranged at the front left and right center of the front part of the machine body, and can be locked and released by a lock lever 25 provided at the center part of the handle 18. A cylindrical support pipe 16 is fixed in the vertical direction at the front left and right center of the upper frame 37, and a support bracket 17 is fixed at the front left and right center of the lower frame 2. The support bracket 17 is provided with pipes 17a and 17b penetrating in the vertical direction in the front-rear direction, the rear pipe 17a and the support pipe 16 have the same inner diameter, and are arranged so that the axes coincide with each other in the vertical direction. A steering shaft 15 is inserted into the pipe 17a and the support pipe 16, and is supported so as to be able to turn left and right and not to slide up and down.
A steering wheel 18 is horizontally provided on the upper end of the steering shaft 15 in the left-right direction so as to have a T-shape when viewed from the front. The left and right center of the front wheel shaft 8 is fixed to the lower end of the steering shaft 15, and front wheels 9 and 9 are rotatably supported on both sides of the front wheel shaft 8. A lock bar 27 protrudes forward from the center of the left and right sides of the front wheel shaft 8.
On the other hand, a lock shaft 26 is slidably inserted into the pipe 17b on the front side of the support bracket 17, and a lock member (holding member) 26a configured in an inverted V shape when viewed from the front is fixed to the lower end of the lock shaft 26. ing. The lock bar 27 is disposed so as to be located at the center of the left and right of the valley of the lock member 26a.
The upper end of the lock shaft 26 is connected and fixed to the lower end of the connecting link 40. The upper end of the connection link 40 is pivotally connected to one end of the lock lever 25. The lock lever 25 is arranged in the front-rear direction, the middle part is pivotally supported by a pin protruding from the lever guide 24, and the rear end protrudes rearward from the handle 18. The lever guide 24 is fixed to the side surface of the support pipe 16. The lever guide 24 is provided with a locking portion for holding the lock lever 25 at a position rotated upward and a position rotated downward.
In such a configuration, when the lock lever 25 is lowered, the lock member 26a is in the upper position via the connecting link 40, the lock bar 27 is positioned between the valleys of the lock member 26a, and the handle 18 is rotated left and right. When the handle 18 is turned to the maximum turning angle, the lock lever 27 contacts the inner surface of the lock member 26a to restrict the maximum turning range. When the lock lever 25 is pushed up, the lock shaft 26 slides downward via the connecting link 40, the lock bar 27 is positioned and restrained on the top of the V-shaped portion of the lock member 26a, and the rotation of the steering shaft 15 is suppressed. The front wheels 9, 9 are held in a straight (forward / backward) position. Thus, in work that requires linear movement, such as work between the furrows, the straight angle is secured and the workability is improved by the function of maintaining the steering angle.

Next, details of the step unit will be described with reference to FIGS. 1, 2, 7, and 8.
In this embodiment, step 5 is divided into two parts in the front and rear, and is composed of a first step 5a and a second step 5b. Note that the division method of the step part is not limited to two divisions in the front-rear direction, and may be a case where no division is performed, a case where division is performed into three or more, and a case where the division direction is the left-right direction. The first step 5a and the second step 5b are supported by a support rail 4 fixed to the body frame. In the first step 5a and the second step 5b, the peripheral portion of the steel plate is bent and formed into a substantially U-shaped cross-sectional shape, and the weight is reduced while ensuring rigidity capable of withstanding the load when the operator is boarded. In addition, holes are drilled on the part where the operator rides to prevent slipping and reduce weight.

The support rails 4 are arranged in a pair of left and right sides, are provided in a plurality of stages on the top and bottom, and are fixed to the upper part of the lower frame 2 and the side frames 36. In this embodiment, the support rail 4 is composed of a shelf receiver having three different heights and a member that couples the shelf receivers to each other. The shelf supports are formed by using angle steel and facing each other on the left and right sides, and the front end portions and the rear end portions thereof are joined with a steel plate or the like to increase rigidity.
Thus, by selecting the height of the first step 5a and the second step 5b to be installed among the shelf receiving portions (support rails 4a, 4b, 4c) configured in three stages, the working height can be reduced. It can be changed easily. Further, for example, as shown in FIG. 8, the work floor can be configured in a staircase pattern by arranging the first step 5a on the second support rail 4b and the second step 5b on the lower support rail 4c. Therefore, the workability is good in work in which the lifting and lowering operation is frequent. The setting of the shelf receiving height is not limited to three steps, and the number of steps may be set according to the work content. Further, the constituent members of the support rail 4 are not limited to the angle steel and the steel plate, but may be any members that can withstand the load when the worker is boarded or when the harvest is loaded.

  In addition, when the driving method is a pedal type or the like, it is considered that the working space or the divided arrangement position of the step part is restricted due to the necessity of the seat or the problem of the arrangement of the pedal. By providing a certain drive lever 11 outside the range of the work space, there is no restriction on the work space and the divided arrangement positions of the step portions, and therefore workability is good.

Below, installation of the auxiliary shelf 41 is demonstrated using FIG.
The simplified movable carriage 1 can be attached with a detachable auxiliary shelf 41 on the side frame 36 and the upper frame 37. That is, the auxiliary shelf 41 includes a placement portion 41a, a locking portion 41b, and a support portion 41c. The placement portion 41a is formed of a flat plate or a frame having an area corresponding to the article to be placed, and is adjusted to the size of the container. The pruning scissors, the clip and the string can also be sized to accommodate other small items. One end of the locking portion 41b is fixed to the mounting portion 41a by a rod or a plate, and a hook is formed at the other end so as to be locked to the upper frame 37. The support portion 41c is configured by a link or the like, and one end is fixed around the lower portion of the placement portion 41a, and the other end is fitted to the side frame 36 to be supported by stretching. In addition, the auxiliary shelf 41 can be attached to the front, or can be attached to the right or left side.
With this configuration, the mounting portion 41a of the auxiliary shelf 41 is attached in the horizontal direction with respect to the machine frame, and a container (container) 42 for storing harvested crops can be loaded on the auxiliary shelf 41. This makes it possible to continue the work while the worker is on the simplified mobile carriage 1, and the frequency of ascending and descending to the carriage is reduced, so that the workability is good.

The right view of the mobile trolley | bogie which is one Embodiment of this invention. The front view of the mobile trolley | bogie which is one Embodiment of this invention. The left side fragmentary figure which shows the detail of the clutch mechanism of the mobile trolley which is one Embodiment of this invention. The left side fragmentary view which shows the brake part of the mobile trolley which is one Embodiment of this invention. The front wheel periphery part front enlarged view of the mobile trolley | bogie which is one Embodiment of this invention. The front wheel periphery part bottom face enlarged view of the mobile trolley which is one Embodiment of this invention. The right side fragmentary sectional view which shows the example of step part arrangement | positioning of the mobile trolley | bogie which is one Embodiment of this invention (the 1). The right side fragmentary sectional view which shows the example of step part arrangement | positioning of the mobile trolley | bogie which is one Embodiment of this invention (the 2). The right view at the time of the auxiliary shelf attachment of the mobile trolley | bogie which is one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Simple type mobile trolley 2 Lower frame 4 Support rail 5a First step 5b Second step 7 Rear wheel 9 Front wheel 10 Drive shaft 11 Drive lever 12 Clutch mechanism 14 Switching lever 15 Steering shaft 16 Support pipe 17 Support bracket 19 Brake release lever 20 Ratchet gear 24 Lever guide 25 Lock lever 26 Lock shaft 27 Lock bar 28 Oscillating member 29 First claw 30 Second claw 31 Support rod 33 First spring 34 Brake wire 36 Side frame 37 Upper frame 38 First switching link 39 First Two switching links 40 Connecting links 41 Auxiliary shelves 46 Brake pads

Claims (8)

  A movement comprising: a body frame provided with a step; wheels rotatably supported on the body frame; and manual driving force generating means for generating power by an operator on the step. Trolley.   The manual drive force generating means includes a drive lever whose one end is pivotally supported by the body frame so as to be capable of reciprocating rotation, and when the drive lever is reciprocally rotated, only one of the forward direction and the reverse direction is used for power. The movable carriage according to claim 1, further comprising: a clutch mechanism that transmits the torque to the wheels.   The clutch mechanism includes a ratchet tooth fixed to a drive shaft that pivotally supports the drive lever, and a substantially central portion pivotally supported by the drive lever so that both ends engage with the teeth of the ratchet gear. A swing member provided with a claw for switching, and switching means for switching which one of the claws engages with the ratchet gear by swinging the swing member. The movable carriage according to claim 2.   The switching means has a switching lever pivotally supported by the drive lever at a substantially central portion, and is slidably supported by the drive lever. One end is pivotally supported by the switching lever, and the other end is supported by the switching lever. The movable carriage according to claim 3, further comprising a link that contacts the swing member.   A brake member that moves in a direction that contacts the wheel and a direction that moves away from the wheel, a spring member that urges the brake member in a direction that the brake member contacts the wheel, and the brake member that moves away from the wheel The mobile carriage according to any one of claims 1 to 4, further comprising: a brake release unit that moves in a moving direction.   A steering shaft that is erected at the center of the left and right of the steered wheel shaft that supports one side of the front and rear sides of the wheel, a support member that supports the steering shaft so as to be able to turn left and right at the front of the body frame, and protrudes from the steering shaft The movable carriage according to any one of claims 1 to 5, further comprising: a lock bar attached to the lock bar; and a lock member that can be engaged with the lock bar.   7. The step according to claim 1, further comprising: a step plate and a support rail fixed to the body frame, the step plate being attachable to different heights. The mobile trolley as described in the item. The movable carriage according to any one of claims 1 to 7, wherein an auxiliary shelf can be attached to the machine body frame.

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