JP6137612B2 - Coupling mechanism between cart and drive wheel unit - Google Patents

Description

  The present invention relates to a carriage and a drive wheel configured such that a carriage, which is a transport vehicle having no driving power, and a driving wheel unit including one wheel and an assist drive mechanism that are driven by power are connected. It relates to a coupling mechanism with the unit.

  Conventionally, as a drive wheel unit, an electrically assisted drive wheel unit that assists human power with a driving force proportional to human power when a person pushes or pulls a steering handle has been proposed. For example, there is a drive wheel unit having an assist drive mechanism that generates a drive torque corresponding to the magnitude and direction of human power applied to the operation handle, and a drive wheel unit that couples the cart and assists human power pushing the cart (patent) Reference 1).

  In a drive wheel unit having a conventional assist drive mechanism, when connecting the drive mechanism and the carriage, a method of tightening with a bolt or the like has been adopted. Accordingly, it is not easy to connect the drive mechanism and the carriage, making it difficult for women and elderly people to work, and reducing the operation rate.

  On the other hand, the applicant of the present application previously described the structure of the carriage connecting arm portion of the electrically assisted driving wheel that generates a driving force corresponding to human power as the upper surface portion of the carriage coupling plate corresponding to the position of the carriage-side upper connecting pin. Is U-shaped with a notch taper structure, and provided with a connecting rod that moves up and down by lever operation inside the lower surface of the carriage coupling plate, while corresponding to the coupling fitting position provided at the carriage coupling part of the electrically assisted drive wheel mechanism Bolt-shaped connecting pins are provided on the upper side of the connecting plate on the cart side, and the connecting plate provided with an L-shaped hook for catching the connecting rod provided at the lower connecting position on the driving wheel side is slid up and down. A coupling structure (Patent Document 2) of an electrically assisted driving wheel and a carriage in which a sliding guide and a support rail that supports the sliding guide are fixedly installed on the carriage is proposed.

  According to this electrically assisted drive wheel (drive wheel unit) and cart connection structure, the drive wheel unit and the cart are connected by an operation of inserting a U-shaped notch into the connection pin on the cart side. It has become. According to this, it can connect simply rather than the method of tightening with a volt | bolt etc. However, the operation of inserting into this connecting pin requires a more precise and skilled operation since the connecting pin is relatively small. Further, since the connecting pin is small, it is difficult to obtain higher strength and durability.

Japanese Patent Application No. 2008-1114826 JP 2008-280021 A

  The problem to be solved regarding the connection mechanism between the carriage and the drive wheel unit is that the drive wheel unit and the carriage are connected by an operation of inserting a U-shaped notch into the connection pin on the carriage side. In such a structure, since the connecting pin is relatively small, it requires a high level of caution in its connection and operation, and the workability deteriorates, and the connecting pin is relatively inferior in strength and durability. It is to become.

  Accordingly, an object of the present invention is to provide a coupling mechanism between a carriage and a drive wheel unit that can be easily and reliably performed with one touch without requiring a high degree of caution. It is in.

  According to one aspect of the connection mechanism between the carriage and the drive wheel unit according to the present invention, the carriage is a carriage that does not have power for driving travel, a drive that includes one wheel that is driven by power and an assist drive mechanism. A connecting arm mounted so as to be rotatable about an attachment shaft which is an axial center standing up and down on the drive wheel unit side so as to be connected to the wheel unit, and on the side of the connecting arm A connecting plate portion provided and connected to the cart side; a connecting plate receiving portion disposed on the cart side so that the connecting plate portion is engaged and connected; and the connecting plate receiving portion And a pressure-receiving spring member that is interposed between the components of any one of the connection arms including the connection plate portion so as to generate a required wheel pressure on the wheels of the drive wheel unit by receiving the load of the carriage. Between a dolly equipped with a drive wheel unit In the binding mechanism, the connecting plate portion is provided in a plate-like shape standing up and down, and the upper edge portion of the connecting plate portion is formed with an inclined surface on the side facing the carriage so as to face upward. A tapered claw portion formed so as to be thin is provided, and a groove-like claw receiving portion formed in a downward groove shape is provided on the upper portion of the connecting plate receiving portion so that the tapered claw portion is fitted and received. Is provided.

  Further, according to one embodiment of the coupling mechanism between the carriage and the drive wheel unit according to the present invention, the coupling plate receiving portion is fixed to the carriage side, and is not separated from the stationary base and is A slide body provided with a connection receiving surface portion that is slidably mounted in a direction and faces the connection plate portion, and is provided with the groove-like claw receiving portion at an upper portion thereof, and is arranged between the slide main body and the fixed base portion The pressure receiving spring member may be provided.

  Moreover, according to one form of the connection mechanism of the trolley | bogie and drive-wheel unit which concerns on this invention, it is always on the opposite side and lower side of the surface which faces the trolley | bogie side of the said connection board part in the said connection arm. Is urged by a spring member so as to protrude downward, and when the connecting plate portion and the connecting plate receiving portion are connected, it is inserted into a locking hole provided in the connecting plate receiving portion and connected. When the connected state is released, a stopper member is provided that is linked to a lifting mechanism so as to release the connected state by lifting upward against the biasing force of the spring member. it can.

  In addition, according to one aspect of the coupling mechanism between the carriage and the drive wheel unit according to the present invention, at least the left and right sides of the coupling plate portion are fitted into the coupling receiving surface portion of the coupling plate receiving portion. A side wall portion is provided to be fitted to the outer wall, and is provided with an inclined surface portion that is continuously formed so as to open outward from the side wall portion and guides when the connecting plate portion is fitted. Can do.

  Further, according to one mode of the connection mechanism between the carriage and the drive wheel unit according to the present invention, the connection arm includes an arm main body mounted on the mounting shaft on the drive wheel unit side, and four arms on the arm main body. The connecting plate portion is mounted to be movable in the vertical direction by a node link structure, and the pressure receiving spring member is disposed between the connecting plate portion and the arm body. can do.

  Further, according to one embodiment of the coupling mechanism between the carriage and the drive wheel unit according to the present invention, the coupling plate portion is rotatably attached to the lower portion of the coupling plate portion, and is always tipped by a spring member. When the connecting plate portion and the connecting plate receiving portion are engaged and connected, the lower end of the connecting plate receiving portion is locked to maintain the connected state. When the connection state is released, a hook member that can rotate the tip side downward against the biasing force of the spring member can be provided.

  Moreover, according to one form of the connection mechanism of the trolley | bogie and drive wheel unit which concerns on this invention, the connection receiving surface part by which the said groove-shaped nail | claw receiving part was provided in the upper part which faces the said connection plate part in the said connection plate receiving part. A side wall portion that is externally fitted to at least the left and right sides of the connection plate portion so that the connection plate portion is fitted, and is formed continuously so as to open outward from the side wall portion. It can be characterized by having an inclined surface portion that guides when it is fitted.

  According to the coupling mechanism between the carriage and the driving wheel unit according to the present invention, the coupling between the carriage and the driving wheel unit can be easily and reliably performed with one touch without requiring a high degree of caution. Has an effect.

It is an example of the connection mechanism of the trolley | bogie and drive wheel unit which concerns on this invention, Comprising: It is a side view which shows the connection state. It is a side view which shows the example of a form of the drive wheel unit which concerns on this invention. It is a front view which shows the drive wheel unit of FIG. FIG. 3 is a plan view showing the drive wheel unit of FIG. 2. It is a front view which shows the example of a form of the connection plate receiving part which concerns on this invention. It is a side view which shows the connection board receiving part of FIG. It is a top view which shows the connection board receiving part of FIG. It is a side view which shows the other example of a connection mechanism of the trolley | bogie and drive wheel unit which concerns on this invention.

Hereinafter, the form example of the connection mechanism of the trolley | bogie and drive wheel unit which concerns on this invention is demonstrated based on FIGS.
In this connecting mechanism between the carriage and the drive wheel unit, the carriage 30 which is a transport vehicle having no driving power is connected to the driving wheel unit 10 having one wheel 11 driven by power and an assist driving mechanism. It is comprised as follows and is provided with the following structures.

  Reference numeral 20 denotes a connecting arm, which is attached to the drive wheel unit 10 so as to be rotatable about an attachment shaft 14 which is an axial center standing up and down. That is, the connecting arm 20 is mounted and provided so that the connecting arm 20 can rotate substantially in a horizontal plane around an axial core extending upright substantially vertically.

  Reference numeral 21 denotes a connecting plate portion, which is provided on the connecting arm 20 side and is connected to the cart 30 side. In this embodiment, it is formed in a rectangular plate shape as an overall shape, and is provided so that the four sides can be guided and connected.

  Reference numeral 31 denotes a connecting plate receiving portion, which is disposed and fixed as an attachment on the cart 30 side so that the connecting plate portion 21 is engaged and connected. In this embodiment, a rectangular shallow box shape is formed so as to receive and engage with the rectangular connecting plate portion 21 (see FIGS. 1 and 5 to 7). That is, the connecting plate receiving portion 31 is formed in a shallow box shape so as to guide the four sides of the connecting plate portion 21 and to fit the connecting plate portion 21 appropriately. The left and right side wall portions 33b, 33b constituting the shallow box shape of this embodiment are portions that receive the connecting plate portion 21 so as to prevent left and right deflection.

  Reference numeral 40 denotes a pressure receiving spring member, which is a component of any one of the connecting plate receiving portion 31 and the connecting arm 20 including the connecting plate portion 21, and receives the load of the carriage 30 to receive the wheels 11 of the drive wheel unit 10. In order to generate the required wheel pressure, According to the pressure receiving spring member 40, a required load is always applied to the wheel 11 by the elastic force of the spring without being directly affected by the weight of the carriage including the load placed on the loading platform. Appropriate wheel pressure is generated, and steering can be performed appropriately. In addition, since the effect of the pressure receiving spring member 40 is relative, it may be disposed on either the cart 30 side or the drive wheel unit 10 side.

  The connecting plate portion 21 is provided in a plate shape standing up and down, and the upper edge portion of the connecting plate portion 21 is formed on the inclined surface 22a so that the surface facing the carriage 30 is directed upward. A taper claw portion 22 formed so as to be thin is provided, and a groove-like claw holder formed in a downward groove shape on the upper portion of the connecting plate receiving portion 31 so that the taper claw portion 22 is fitted and received. A part 32 is provided. The groove-like claw receiving portion 32 of this embodiment is provided by being formed so that the plate material is bent downward. The groove-like claw receiving portion 32 is set to be lower than the position of the connecting plate portion 21 in a standing state in which the drive wheel unit 10 travels normally when the connecting plate portion 21 is not connected. Has been.

According to this, the operator holds the steering handle 12 and tilts the connecting plate portion 21 to insert the tapered claw portion 22 into the groove-like claw receiving portion 32. Then, the inserted connecting plate portion 21 is erected so as to be twisted. That is, the drive wheel unit 10 is rotated so as to return from the state where the drive wheel unit 10 is tilted forward to the original standing state. By this operation, a force acts in a direction in which the connecting plate receiving portion 31 is lifted from the connecting plate portion 21 via the groove-like claw receiving portion 32. In this embodiment, the slide main body 33 including the connection receiving surface portion 33a described later is lifted, and the pressure receiving spring member (coil spring 40 described later) is compressed. Thereby, in a state where an appropriate wheel pressure is applied to the wheel 11, the connecting plate portion 21 and the connecting plate receiving portion 31 are engaged, and the carriage 30 and the drive wheel unit 10 can be connected easily and rationally.
Note that the upper edge of the tapered claw portion 22 of the connecting plate portion 21 is formed in a linear shape, and is in contact with the upper side wall portion 32a (see FIG. 5) constituting the groove-like claw receiving portion 32 within a relatively long range. The force to touch and lift upwards can be transmitted. Further, the upper end edge of the taper claw portion 22 also comes into contact with the folded portion 32b constituting the groove-like claw receiving portion 32 within a relatively long range, and the engagement state can be suitably maintained. Thus, since the upper end edge of the taper claw part 22 contacts, it is hard to damage and has a structure with excellent durability.

  In the embodiment shown in FIGS. 1 and 5 to 7, the connecting plate receiving portion 31 is fixed to the carriage 30 side, and is attached to the fixed base 35 so as not to be detached and slidable in the vertical direction. The slide main body 33 having a connection receiving surface portion 33a facing the connection plate portion 21 and provided with a groove-like claw receiving portion 32 on the upper portion thereof, and a pressure receiving spring member disposed between the slide main body 33 and the fixed base portion 35 40. According to this, the pressure receiving spring member 40 can be appropriately disposed on the side of the connecting plate receiving portion 31, and an appropriate wheel pressure can be applied to the wheel 11.

Further, a specific configuration of the embodiment shown in FIGS. 1 and 5 to 7 will be described below.
The fixed base 35 of this embodiment is formed in a U shape as a vertical cross-sectional shape, and a pair of insertion holes 36 are provided in the upper and lower horizontal plate portions 35a and 35b, respectively. A slide shaft 37 is inserted into the upper and lower insertion holes 36 so as to be slidable, and the slide shaft 37 is inserted into a coil spring 40 which is an example of a pressure receiving spring member. The coil spring 40 is guided and arranged on the slide shaft 37 so as to be able to expand and contract between the upper horizontal plate portion 35 a and a spring receiving portion 38 fixed to the middle portion of the slide shaft 37.

  Further, the slide body 33 of the present embodiment is provided in a U-shape as a vertical cross-sectional shape covering the fixed base 35 from the lateral direction so as to fix the slide shaft 37 in the vertical direction on the surface side of the carriage 30. The main body portion 33x and a connection receiving surface portion 33a that is integrally fixed to the main body portion 33x and that faces the surface of the connection plate portion 21 of the drive wheel unit 10 are provided. According to the above embodiment, the connecting plate receiving portion 31 having a robust structure and high reliability is rationally configured.

Further, in this embodiment, the connection receiving surface portion 33a of the connection plate receiving portion 31 is provided with side wall portions 33b and 33b that are externally fitted to at least the left and right sides of the connection plate portion 21 so that the connection plate portion 21 is fitted. A slope guide portion 33c that is continuously formed so as to open outward from the side wall portion 33b and that guides when the connecting plate portion 21 is fitted is provided.
Connection work can be easily performed without requiring more attention and skill, and workability can be improved and production efficiency can be improved.

  Furthermore, in this embodiment, a pair of protrusion guide portions 33f are provided on the surface of the connection receiving surface portion 33a. The protrusion guide portion 33f can be formed by, for example, a bolt head screwed into the connection receiving surface portion 33a. In this embodiment, a pair of U-shaped notches 21 a are provided on the upper edge side of the connecting plate portion 21. The notch portion 21 a is configured to fit into the protrusion guide portion 33 f when the connecting plate portion 21 is engaged with the connecting plate receiving portion 31. According to this, the connecting plate portion 21 can be suitably engaged with the connecting plate receiving portion 31 so that the connecting plate portion 21 does not sway at a predetermined position, and the drive wheel unit 10 and the carriage 30 can be connected suitably and reliably.

Next, an embodiment of the stopper mechanism 50 that maintains the connected state in which the connecting plate portion 21 is connected to the connecting plate receiving portion 31 will be described below.
In the stopper mechanism 50 of the embodiment shown in FIGS. 1 and 2, the connecting arm 20 protrudes downward on the side opposite to the surface of the connecting plate portion 21 facing the carriage 30 and downward. When the connecting plate portion 21 and the connecting plate receiving portion 31 are energized by the spring member 55, the connecting plate portion 21 and the connecting plate receiving portion 31 are inserted into the locking holes 34 provided in the connecting plate receiving portion 31 to maintain the connected state. In order to release the connected state, a stopper member 51 is provided in which a lifting mechanism is linked so as to release the connected state by pulling upward against the urging force of the spring member 55.

  Further, in the stopper mechanism 50 of this embodiment, the wire lever 52 is mounted on the upper portion of the support frame 13 of the steering handle 12, the wire 53 is connected to the wire lever 52, and the chain 54 is connected to the lower end of the wire 53. And a rod-like stopper member is coupled to the lower end of the chain 54. The spring member 55 includes a lower spring member 55a that biases the stopper member 51 so as to protrude downward, and an upper spring member 55b that biases the chain 54 downward.

  Further, the locking hole 34 is provided in the lower side wall portion 33d that extends toward the drive wheel unit 10 at the lower front center of the connecting plate receiving portion 31 and constitutes a part of the above-described shallow box shape. . In the present embodiment, a lower slope guide portion 33e is provided that forms a slope so as to extend outward continuously from the lower side wall portion 33d (see FIGS. 5 to 7).

According to this stopper mechanism 50, the wire lever 52 is gripped and moved upward of the stopper member 51, the connecting plate portion 21 is engaged with the connecting plate receiving portion 31, and then the holding of the wire lever 52 is released. Then, the stopper member 51 protrudes downward by the action of the spring member 55 and is easily and rationally locked. The stopper member 51 protrudes downward by the action of the spring member 55 and is easily and rationally locked. The stopper member 51 can be unlocked by grasping the wire lever 52 and pulling up the stopper member 51.

Next, a form in which a pressure receiving spring member 40 (not shown in FIG. 8) is incorporated on the side of the connecting arm 20 will be described with reference to FIG.
An arm main body 25 in which the connecting arm 20 is mounted on the mounting shaft 14 on the drive wheel unit 10 side, and a connecting plate portion 21 mounted on the arm main body 25 so as to be movable in the vertical direction by the four-bar link structure 26. The pressure receiving spring member 40 is arranged between the connecting plate portion 21 and the arm main body 25. According to this, the pressure receiving spring member 40 can be appropriately arranged on the side of the connecting arm 20, and an appropriate wheel pressure can be applied to the wheel 11. Similar to the embodiment described above, the connecting plate portion 21 and the connecting plate receiving portion 31 are engaged with each other in a state where an appropriate wheel pressure is applied to the wheel 11, and the cart 30 and the drive wheel unit 10 are easily and rationally engaged. Can be linked to.

  In this embodiment, the pair of rotating links 26a, 26a of the four-bar link structure 26 are arranged on the left and right, respectively, and the pressure receiving spring member 40 is interposed between the pair of left and right rotating links 26a, 26a. A certain coil spring 40 is arranged. According to this, it becomes the rational structure which operate | moves stably, and can improve the workability | operativity of connection work.

  Further, in the embodiment of FIG. 8, the connecting plate portion 21 is rotatably attached to the lower portion of the connecting plate portion 21, and is always urged by the spring member 61 so that the distal end side is rotated upward. When the connecting plate portion 21 and the connecting plate receiving portion 31 are engaged and connected, the connecting plate receiving portion is engaged with the lower edge 39 to maintain the connected state and release the connected state. Is provided with a hook member 60 that can turn the tip side downward against the biasing force of the spring member 61.

As shown in FIGS. 1 to 4 and 8, in the drive wheel unit 10, 15 is a control box that controls the assist drive mechanism, and is proportional to the human power when the person pushes or pulls the steering handle 12. Control is provided to assist human power with driving force. Reference numeral 16 denotes a storage battery. For example, a lithium ion secondary battery is used, and is attached to a battery box provided on the support frame 13 of the steering handle 12 so as to be detachable. Reference numeral 17 denotes an electric motor, which is built in the unit body 18.
As shown in FIGS. 1 and 8, in the cart 30, 30a is a platform, 30b is a wheel of the cart, and 30c is a handle of the cart.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

DESCRIPTION OF SYMBOLS 10 Drive wheel unit 11 Wheel 12 Steering handle 13 Strut frame 14 Mounting shaft 15 Control box 16 Storage battery 17 Electric motor 18 Unit body 20 Connecting arm 21 Connecting plate part 21a Notch part 22 Tapered claw part 22a Slope 25 Arm body 26 Four-bar link Structure 26a Rotating link 30 Carriage 31 Connecting plate receiving portion 32 Groove-shaped claw receiving portion 33 Slide body 33a Connection receiving surface portion 33b Side wall portion 33c Slope guide portion 33d Lower side wall portion 33e Lower side slope guide portion 33f Projection guide portion 33x Main body portion 34 Locking hole 35 Fixed base 35a Horizontal flat plate portion 35b Horizontal flat plate portion 36 Insertion hole 37 Slide shaft 38 Spring receiving portion 39 Lower edge 40 of connecting plate receiving portion Pressure receiving spring member (coil spring)
50 Stopper mechanism 51 Stopper member 52 Wire lever 53 Wire 54 Chain 55 Spring member 55a Lower spring member 55b Upper spring member 60 Hook member 61 Spring member

Claims (7)

In order to connect the carriage, which is a transport vehicle without driving power, and the driving wheel unit having one wheel driven by power and an assist driving mechanism, in the vertical direction on the side of the driving wheel unit. A connecting arm mounted so as to be rotatable about a mounting shaft serving as an upright axis; a connecting plate provided on the connecting arm and connected to the carriage; and the connecting plate A connecting plate receiving portion disposed on the side of the carriage such that the connecting plate is engaged and connected, and the connecting plate receiving portion, and any one of the connecting arms including the connecting plate portion. In the coupling mechanism between the carriage and the drive wheel unit, including a pressure receiving spring member interposed so as to generate a required wheel pressure on the wheels of the drive wheel unit by receiving the load of the carriage,
The connecting plate portion is provided in a plate shape standing up and down, and the upper edge portion of the connecting plate portion is formed with a slope on the side facing the carriage side, so that the wall becomes thinner upward. A taper claw portion formed in the manner described above is provided, and a grooved claw receiving portion formed in a downward groove shape is provided on the upper portion of the connecting plate receiving portion so that the taper claw portion is fitted and received. A mechanism for connecting a cart and a drive wheel unit.   The connecting plate receiving portion is fixed to the carriage side, and is fixed to the carriage, and is attached to the connecting plate portion so as not to be separated from the fixed base and slidable in the vertical direction. The carriage and the drive wheel according to claim 1, further comprising: a slide main body including a connection receiving surface portion provided with a receiving portion; and the pressure receiving spring member disposed between the slide main body and the fixed base portion. Connection mechanism with the unit.   The connecting plate is biased by a spring member so as to protrude downward on the side opposite to the surface facing the carriage side of the connecting plate, and the connecting plate and the connecting plate. When the receiving portion is connected, it is inserted into a locking hole provided in the connecting plate receiving portion to maintain the connected state, and when the connected state is released, it resists the biasing force of the spring member. 3. The coupling mechanism between a cart and a drive wheel unit according to claim 2, further comprising a stopper member linked to the lifting mechanism so as to be lifted upward to release the coupled state.   A side wall portion that is externally fitted to at least the left and right sides of the connection plate portion is provided on the connection receiving surface portion of the connection plate receiving portion so that the connection plate portion is fitted, and is continuously opened so as to open outward from the side wall portion. 4. A coupling mechanism between a carriage and a drive wheel unit according to claim 2, further comprising an inclined surface portion formed so as to be guided when the coupling plate portion is fitted.   The connection arm includes an arm main body mounted on the mounting shaft on the drive wheel unit side, and the connection plate portion mounted on the arm main body so as to be movable in the vertical direction by a four-bar link structure. 2. The coupling mechanism between a carriage and a driving wheel unit according to claim 1, wherein the pressure receiving spring member is arranged between the coupling plate portion and the arm body.   The connecting plate portion is rotatably attached to the lower portion of the connecting plate portion, and is normally urged by the spring member so that the tip end side is rotated upward, and the connecting plate portion and the connecting plate receiving portion. Is engaged with and connected to the lower edge of the connecting plate receiving portion to maintain the connected state, and when the connected state is released, the front end side resists the biasing force of the spring member. 6. The coupling mechanism between the carriage and the drive wheel unit according to claim 5, further comprising a hook member that can rotate the wheel downward.   The connection plate portion is fitted on at least the left and right sides of the connection plate portion so that the connection plate portion fits into the connection receiving surface portion provided with the groove-like claw reception portion on the upper portion of the connection plate reception portion facing the connection plate portion. A side wall portion is provided, and is provided with an inclined surface portion that is continuously formed so as to open outward from the side wall portion and guides when the connecting plate portion is fitted. 6. A coupling mechanism between the carriage and the drive wheel unit according to 6.

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