JP3088684U - Driving assistance device for bogie - Google Patents

Abstract

(57) [Summary] [Problem] Truck 1 even on a frozen or compacted road
0 runs smoothly. A sliding frame is provided on a lower surface of a carriage.
1, 22 and 22 are provided symmetrically. Sliding frame 2
The heights 1, 21, 22, 22 can be set above and below the ground point of the wheels 12, 12, 13, 13 via a common height adjustment mechanism 30, and can be slid on the road surface as needed. .

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a traveling assistance device for a bogie that can smoothly travel even on a road surface in a frozen state or in a snow compacted state.

[0002]

[Prior art]

 When transporting luggage, a push cart may be used.

[0003] A conventional truck has a pair of front and rear wheels mounted on the lower surface of a rectangular carrier, and a total of four wheels, and a handle for pushing is provided at the rear end of the carrier. In addition, the left and right wheels on the front side or the rear side adopt a caster type in which the rolling direction can be freely changed. Therefore, the cargo can be transported freely on a flat road surface via front and rear wheels by loading the cargo on a loading platform and pushing a handle, thereby carrying the cargo.

[0004]

[Problems to be solved by the invention]

 According to this conventional technique, the bogie travels via the front and rear wheels, so if the road surface is frozen or snowy, the wheels do not roll properly and the vehicle cannot travel. There was a problem that there is.

[0005] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a sliding frame on the underside of the bogie so that the vehicle can travel smoothly even on a frozen or snow-covered road surface. It is an object of the present invention to provide a traveling assistance device for a cart that can perform the following.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the configuration of the present invention comprises at least two sliding frames symmetrically attached to the lower surface of a hand-drawn carriage having a pair of front and rear wheels, and the sliding frame being parallel to the carriage of the carriage. And a common height adjustment mechanism for raising and lowering the vehicle. The gist of the height adjustment mechanism is to set the height of the sliding frame above and below the ground point of the wheels of the bogie.

[0007] The sliding frame can be formed and arranged so as not to interfere with caster wheels.

[0008] The sliding frame can be detachably attached to the bogie via the subframe together with the height adjusting mechanism.

[0009] Furthermore, each of the sliding frames may be curved upwardly in front of and behind a straight contact portion, and at least one of the sliding frames has the contact portion formed to be longer than the minimum distance between the front and rear wheels. Is also good.

[0010] Each of the sliding frames can be formed from a bar having a ridge line having an arc-shaped cross section on the road surface side.

[0011]

[Action]

 According to the configuration of the present invention, the sliding frame attached symmetrically to the lower surface of the bogie can be set above and below the ground point of the wheels of the bogie via a common height adjustment mechanism. That is, if each sliding frame is higher than the ground point of the wheels, the bogie can be smoothly moved on a flat road surface using the wheels. Even if it falls into a rut or the like, it can prevent an accident such as an excessive inclination or fall through the sliding frame. In addition, by making each sliding frame lower than the grounding point of the wheels, it is possible to slide on a frozen or snow-covered road surface, and to make the bogie run smoothly without using wheels. In addition, it is preferable to use the sliding frame at a position of about 1 to 2 cm above or below the contact point of each wheel. Two sliding frames shall be arranged symmetrically on both outer sides of the left and right wheels of the bogie, and if there are any remaining, they shall be arranged symmetrically inside the wheels. However, the sliding frame can be made of metal materials such as iron, aluminum, and stainless steel, hard synthetic resin materials including engineering plastics, and wood.

[0012] By forming and arranging the sliding frame so as not to interfere with the caster-type wheels, the caster-type wheels can be freely turned. By properly selecting the overall length and location of the sliding frame, it can be removed from the front, rear, left and right of the turning range of the caster-type wheels.

[0013] The sliding frame is detachably attached to the bogie via the subframe, so that it can be easily attached to and detached from the bogie together with the height adjusting mechanism as required.

When each of the sliding frames is curved upwardly in front of and behind a linear contact portion, the sliding frame can smoothly slide on a frozen or snow-covered road surface without being hit by unevenness on the road surface.

If the ground contact portion of at least one sliding frame is made longer than the minimum distance between the front and rear wheels, it is possible to effectively prevent the bogie from leaning back and forth excessively through the sliding frame. However, the minimum inter-axle distance here means the minimum value of the inter-axle distance between the front and rear wheels that changes depending on the rolling direction of the caster type wheel.

[0016] Since each sliding frame formed from a rod having an arc-shaped ridge on the road surface side can have a sufficiently small width, snow does not clog between the sliding surface and the road surface. Absent.

[0017]

[Embodiment of the invention]

 Hereinafter, embodiments of the invention will be described with reference to the drawings.

The traveling assist device of the bogie includes a sliding frame 21, 21, 22, 22 symmetrically attached to the lower surface of the hand-drawn bogie 10, and a common height for raising and lowering the sliding frames 21, 21, 22, 22. And an adjusting mechanism 30 (FIGS. 1 and 2).

The trolley 10 is configured by mounting a pair of front and rear four wheels 12, 12, 13, 13 on the lower surface of, for example, a rectangular loading platform 11, and a rear end of the loading platform 11 has a gate. A shape handle 14 is provided upright. The wheels 12, 12 on the front side are caster-type, and the rolling direction can be arbitrarily changed. The handle 14 is erected on the carrier 11 via a lock mechanism (not shown) in the brackets 14a, 14a fixed on the carrier 11, for example. The trolley 10 can load the luggage W on the luggage carrier 11, push the handle 14, and arbitrarily travel on the flat road surface F via the wheels 12, 12, 13, 13.

The sliding frames 21, 21, 22, 22 are detachably mounted on the lower surface of the carrier 11 of the bogie 10 via a subframe 41, together with a pantograph-type height adjusting mechanism 30. The sub-frame 41 is formed in a frame shape and is screwed to the lower surface of the carrier 11 via set screws 41a, 41a,.

The sliding frames 21, 21 are arranged on both outer sides of the left and right wheels 12, 13, 12, 13 of the bogie 10 (FIGS. 1, 3), and the sliding frames 22, 22 are mounted on the wheels 12, 13. , 12, and 13 are provided. That is, the sliding frames 21, 21, 22, 22 are arranged symmetrically with respect to the center line of the bogie 10 in the longitudinal direction (not shown). The sliding frames 21 and 21 have their front portions sufficiently short, and the sliding frames 22 and 22 are arranged sufficiently inside the front and rear wheels 12 and 13, respectively, so that the caster wheels 12 and 12 can be connected to each other. In order not to cause interference, the wheels 12, 12 are formed outside the turning ranges a, a and arranged.

Each of the sliding frames 21 and 22 is formed of a bar having a ridge P having an arc-shaped cross section on the road surface F side (FIGS. 1 and 4). However, FIGS. 4A and 4B are a front view and an operation diagram, respectively, corresponding to the view in the direction of arrow X in FIG. Each of the sliding frames 21 and 22 is formed by smoothly curving the front and rear portions of a linear contact portion upward and upward, and the front portion has a curvature larger than the rear portion. The rear ends of the sliding frames 21 and 22 are aligned near the rear end of the carrier 11, and the front ends of the sliding frames 22 and 22 are aligned near the front end of the carrier 11. That is, each of the sliding frames 22 has a length L> d of a linear contact portion (FIG. 2). Here, d is the minimum distance between the front and rear wheels 12 and 13, and symbols Q and da in FIG. 2 indicate the ground point of the wheel 12 or the wheel 13 and the maximum distance between the wheels 12 and 13, respectively. ing.

The height adjusting mechanism 30 includes four sets of front and rear links 31, 31... 32, 32, 32, which are vertically connected via front and rear connection rods 33, 33. It is configured by combining screw members 33a, 33a mounted on each intermediate portion and a common drive shaft 34 screwed to the screw members 33a, 33a (FIGS. 1, 3).

Each set of links 31, 31, 32, 32 connects a bracket 21 a or 22 a attached to each sliding frame 21, 22 and a bracket 41 c attached to the lower surface of the subframe 41. That is, the lower ends of the links 31, 31 are connected to the brackets 21a, 21a, 22a, 22a attached to the front and rear of the respective sliding frames 21, 22 so as to be relatively rotatable. The upper ends of the links 32, 32 are connected to the bracket 41c so as to be relatively rotatable. The front and rear brackets 41c, 41c,... Are arranged so as to correspond to the respective sliding frames 21, 22, and the respective front and rear links 31, 31, 32, corresponding to the respective sliding frames 21 or the respective sliding frames 22. 32 are arranged so as to face each other (FIG. 2). The drive shaft 34 has front and rear male screw portions 34a and 34b screwed to the front and rear screw members 33a and 33a, respectively, formed in opposite threads (FIG. 3), and an operation handle 35 with an operation lever 35a is attached to the rear end. ing.

The height adjustment mechanism 30 rotates the drive shaft 34 in the forward and reverse directions via the operation handle 35, and simultaneously expands and contracts the front and rear links 31, 31..., 32, 32. , 21, 22, 22 are evenly moved up and down in parallel with the loading platform 11, and the height can be set above and below the ground points Q, Q... Of the wheels 12, 12, 13, 13 (FIGS. 2, 4 ( A), (B)). When the height adjustment mechanism 30 extends the links 31, 31, 32, and 32 of each set in a straight line to lower the sliding frames 21, 21, 22, and 22 to the maximum (FIG. 5), By bringing the inner portion of the horizontal upper side of each link 32 into contact with the lower surface of the sub-frame 41, the bending of each set of links 31, 31, 32, 32 when the sliding frames 21, 21, 22, 22 are raised. It is preferable to define the direction outward.

When the sliding frames 21, 21, 22, 22 are retracted above the grounding points Q, Q... Of the wheels 12, 13 via the height adjusting mechanism 30 (FIGS. 2, 4A), The cart 10 can be freely moved and moved on a flat road surface F via wheels 12, 12, 13, 13. At this time, it is preferable that the sliding frames 21, 21, 22, 22 are set about 1-2 cm above the grounding points Q, Q,... Of the wheels 12, 12, 13, 13,.

When the road surface F is in a frozen state or in a snow-covered state, the sliding frames 21, 21, 22, 22 are set about 1-2 cm below the grounding points Q, Q,... Of the wheels 12, 13 (FIG. 4 (B)). ), FIG. 6). At this time, the truck 10 can smoothly slide on the road surface F via the sliding frames 21, 21, 22, 22, and the wheels 12, 12, 13, 13 do not contact the road surface F.

When not in use, the sliding frames 21, 21, 22, 22 can be easily removed from the carriage 10 together with the height adjusting mechanism 30 via the sub-frame 41.

[0029]

[Other embodiments]

 The height adjusting mechanism 30 may use worms 39a, 39a, worm wheels 39b, 39b, drive arms 39c, 39c, etc. instead of the pantograph type by the links 31, 31,. (FIG. 7). The worms 39a, 39a are mounted on a common drive shaft 34. On the shaft 39b1 of each worm wheel 39b, drive arms 39c, 39c... It is fixed by protruding. The tip of each drive arm 39c is rotatably connected to the bracket 21a on the sliding frame 21 or the bracket 22a on the sliding frame 22. When the drive shaft 34 is rotated in the forward and reverse directions, the drive arms 39c, 39c... Are simultaneously swung up and down via the worms 39a, 39a and the worm wheels 39b, 39b, and the sliding frames 21, 21, 22, 22 are moved. It can be moved up and down by moving it up and down in parallel.

In the above description, one or three or more sliding frames 22, 22 inside the wheels 12, 12, 13, 13 are arranged symmetrically with respect to the center line of the bogie 10 in the front-rear direction. Is also good. Further, at least two sliding frames 21, 21, 22, 22 can be provided as a whole by omitting one of the sets. The cross-sectional shape of each of the sliding frames 21 and 22 may be a simple circle or polygon other than the illustration.

[0031]

[Effect of the invention]

 As described above, according to the present invention, at least two sliding frames are provided symmetrically on the lower surface of the bogie, so that the sliding frames can be moved above and below the ground point of the wheels via a common height adjustment mechanism. The height can be set as required, and the vehicle can be slid on the road surface as required. Therefore, there is an excellent effect that the bogie can be smoothly moved and moved even on a road surface in a frozen state or a snow-covered state.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the entire configuration.

FIG. 2 is a side view of the overall configuration.

FIG. 3 is an explanatory plan view of the entire configuration.

FIG. 4 is an explanatory front view of FIG. 2;

FIG. 5 is an enlarged sectional explanatory view of a main part.

FIG. 6 is an explanatory view of a use state.

FIG. 7 is a schematic view showing another embodiment.

[Explanation of symbols]

 F ... Road surface P ... Ridge line Q ... Grounding point d ... Minimum distance between shafts 10 ... Bogie 11 ... Carrier 12,13 ... Wheels 21,22 ... Sliding frame 30 ... Height adjustment mechanism 41 ... Sub frame

Claims (6)

[Utility model registration claims] At least two sliding frames attached symmetrically to the lower surface of a hand-drawn carriage having a pair of front and rear wheels, and a common height adjustment mechanism for moving the sliding frames up and down in parallel with a carrier of the carriage. And a height adjusting mechanism for setting the height of the sliding frame above and below a contact point of wheels of the bogie. 2. The bogie traveling assist device according to claim 1, wherein the sliding frame is formed and arranged so as not to interfere with caster-type wheels. 3. The traveling assistance device for a bogie according to claim 1, wherein the sliding frame is detachably mounted on the bogie via a subframe together with the height adjusting mechanism. 4. The traveling assistance device for a bogie according to claim 1, wherein each of the sliding frames is curved upwardly in front of and behind a linear contact portion. 5. The at least one gliding frame,
The travel assist device for a bogie according to claim 4, wherein the ground contact portion is formed to be longer than the minimum distance between the front and rear wheels. 6. The travel assist device for a bogie according to claim 4, wherein each of the sliding frames is formed of a bar having a ridge line having an arc-shaped cross section on a road surface side.