JPH0510189U - Tractor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lightweight and easy-to-use guide / bicycle towing vehicle that is easy to disassemble and assemble. A chassis 2 integrally formed of synthetic resin, a connecting pipe bent into a substantially L shape, and two wheels rotatably supported by an axle. The lower part of the connecting pipe is fixed to the chassis so that it cannot rotate and can be removed. A portion of the connecting pipe below the connecting hole is used as a supporting leg. Secure the wheel axle to the bearing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  This device can be towed by a bicycle and is easy to handle for children and women. The present invention relates to a towing vehicle for carrying luggage.

[0002]

[Prior art]

  Bicycle towing vehicles are for carrying light loads and can be towed by hand. Therefore, the towing vehicle itself must be lightweight. Moreover, this type of towing vehicle is packed Since it may be sold as a commercial product through a mass retailer, It is required to be easy to disassemble and assemble.

[0003]   However, conventional bicycle towing vehicles mainly have a steel frame structure and are large in weight and size, and lightweight. It was not suitable for transportation. In addition, the chassis frame is made of metal pipe and welded Since it is common to include the It was difficult.

[0004]   In order to improve this, Japanese Utility Model Publication No. 2-141592, registered design 609126 Although a towing vehicle as disclosed in the official gazette has been proposed, the chassis frame and the loading platform are constructed separately. There is a lot of man-hours required to assemble the axle and wheels and attach the platform to the chassis frame. Moreover, there is a problem that there are many parts.

[0005]

[Problems to be solved by the device]

  This device is lightweight, easy to disassemble and assemble, and easy to use. The challenge is to provide a bicycle towing vehicle.

[0006]

[Means for Solving the Problems]

  Chassis made by integral molding of synthetic resin, bent into a substantially L shape with vertical and horizontal parts It has a connecting pipe and two wheels that are rotatably supported on the axle.   The chassis has a pipe receiving part with a vertical connecting hole at the front end, and a wheel on the bottom side. A bearing portion for horizontally supporting the axle of the vehicle.   Insert the lower part of the vertical part of the connecting pipe into the connecting hole of the chassis to prevent it from rotating. It is detachably fixed.   A portion of the connecting pipe below the connecting hole is a supporting leg.   Fix the wheel axle to the bearing and mount the wheel to the chassis.   The axle may be formed integrally with the chassis.

[0007]

[Action]

  The chassis is made of synthetic resin together with the bearing (axle) and the connecting hole of the connecting pipe. The product configuration reduces the weight of the towing vehicle and reduces the number of parts.   A chassis made of synthetic resin integrally molded, a substantially L-shaped connecting pipe, and the lower part as a supporting leg And a configuration with removable wheels facilitate disassembly and assembly of the towing vehicle, Make the packaging small.

[0008]

【Example】

  1 and 2 show a towing vehicle 1 according to a first embodiment of the present invention, which has a flat plate shape. Chassis 2, two L-shaped wheels with a connecting pipe 3 bent into a substantially L shape, and an axle 4 Have 5, 5.   The chassis 2 is a synthetic resin integrally molded product, and has a relatively thin and flat upper wall 6 (FIG. 3). Is a pallet-shaped flat plate having a peripheral wall 7 and vertical and horizontal reinforcing ribs 8 formed on the lower surface side of The pipe receiving portion 9 is provided at the front end, and the bearing portions 10, 10 (FIG. 4) are provided on both sides. The pipe receiving portion 9 has a connecting hole 11 having a semicircular cross section and penetrating vertically. The bolt insertion hole 12 is provided so as to penetrate in the front-rear direction.

[0009]   When the fixing bolt 13 is inserted from the front of the bolt insertion hole 12, the connecting hole 11 is crossed. The tip is formed so as to reach the lower surface of the upper wall 6. The bearing 10 has the axle 4 It has a shaft support hole 14 penetrating therethrough and supports the axle 4 horizontally in the horizontal direction. Also, of the chassis 2 Mounting holes 15 are formed at the four corners of the upper surface by cutting a female screw.

[0010]   The connecting pipe 3 is a lightweight round pipe made of aluminum alloy, and its outer diameter is The inner diameter of the mounting hole 11 (semicircle) is approximately equal to that of the vertical portion 3 which is bent into a substantially L shape. a and the lateral portion 3b. The lower half of the vertical portion 3a has a semicircular cross section. It is crushed and molded so that it can be inserted into the connection hole 11, and this part The adjustment holes 16 penetrating in the rear direction are formed vertically at predetermined intervals. The above stop The belt 13 can pass through the adjusting hole 16.

[0011]   A locking hole 17 is formed at the tip of the lateral portion 3b of the connecting pipe 3. . This is for attaching the connecting fitting 19, and the towing vehicle 1 is supported by the bicycle. It is necessary when connecting to the dollar post 18. The connecting fitting 19 is a saddle post The cylindrical portion 20 fitted in the upper portion 18 is vertically opposed to the rear portion of the cylindrical portion 20 and provided with engaging holes 21 respectively. The connecting projection 22 and the front portion of the tubular portion 20 which are opposed to each other on the left and right and have through holes 23 respectively. And a connecting pin 25 and a connecting bolt 26. It is connected to the connecting pipe 3 and the saddle post 18.

[0012]   The axle 4 has a screw 27 with a small diameter at both ends to form a step, and Is rotatably supported by inserting the central boss 28 into the axle 4. Boss 28 Is a spacer that protrudes from the chassis side and the tire portion is the chassis when the wheels 5 rotate. It is designed so as not to contact the side surface of 2.

[0013]   Assembly of the towing vehicle 1 having the above configuration is performed as follows.   Insert the axle 4 into the shaft support holes 14 of the bearings 10 on both sides of the chassis 2 to the side. The first washer 29 is fitted to the protruding portion, and then the wheel 5 is fitted. Then, the second washer 30 is fitted, and finally the cap nut 31 is attached to the screw 27 at both ends of the axle 4. It is screwed in to prevent it from coming off (Fig. 2).

[0014]   Insert the lower portion of the vertical portion 3a of the connecting pipe 3 into the connecting hole 11 of the pipe receiving portion 9, The chassis 2 is set in a substantially horizontal state, and its lower end is brought close to the ground (road surface). Stop From the outside of the pipe receiving portion 9, attach the bolt 13 to the bolt insertion hole 12 and the connecting pipe 3. Insert it into one of the adjusting holes 16 and insert it through the washer 32 into the portion that has reached the lower surface of the upper wall 6. The nut 33 is attached and the connecting pipe 3 is fixed to the chassis 2 so as not to rotate. In addition, consolidated The cross-sectional shape of the pipe 3 and the connecting hole 11 is not limited to a semicircle, but a polygon such as a polygon cannot be rotated. It does not matter if it is non-circular, and it is a bolt that penetrates regardless of the cross-sectional shape. Any fixing means can be used.

[0015]   The connecting pipe 3 projects below the pipe receiving portion 9 and the tip reaches the ground surface. The part that is formed is the supporting leg 34 for preventing the front part of the chassis 2 from being greatly inclined. (Fig. 1).   This completes the assembly.

[0016]   When the connecting fitting 19 is required, connect the connecting projection 22 to the end of the lateral portion 3b of the connecting pipe 3. Fit it into the end and fit the connecting pin 25 into the engaging hole 21 and the locking hole 17 from above. Just enough. In addition, to attach this to the bicycle, tighten the clamping tabs 24 on both sides. Insert the connecting protrusion 19 into the saddle post 18 by pushing it open, and then The bolt 26 may be passed through the insertion hole 23 and the nut 34 may be attached and fixed.   When disassembling the towing vehicle 1, the reverse of the above may be performed. However, there are strict procedures Do not mean.

[0017]   The towing vehicle 1 configured as described above is fixed to the chassis 2 with an appropriate container, or By directly pulling the object on the chassis and pulling the part of the connecting pipe 3 by hand, Or, the tip of the connecting pipe 3 is used by connecting to the bicycle. In any case, integrated Compared to the conventional frame structure made of iron pipe, the chassis 2 made of synthetic resin is shaped. In comparison, each step is lighter and less tired. Also, since there are supporting legs 34, In this case, even if the connecting pipe 3 is released, the chassis 2 is less inclined and the one on the chassis slips off. There is no such thing as a drop. Further, when towed, the connecting pipe 3 and chassis 2 Is fixed non-rotatably, the followability of the chassis 2 to the connecting pipe 3 is good. . When installing the towing vehicle 1 on a bicycle, adjust the position of the adjustment hole 16 So that the support leg 34 does not become too long.

[0018]   Further, in the towing vehicle 1, the chassis 2 is integrated with the pipe receiving portion 9 and the bearing portion 10. Because it is molded and the lower part of the connecting pipe 3 is used as the support leg 34, etc. The number of parts is small, the structure is simple, and because it is lightweight, disassembly and assembly are easy. .

[0019]   5 and 6 show the second and third embodiments, in which the structure relating to the pivotal support of the wheel 5 is the first. Different from the case of the embodiment.   In the shaft support structure of FIG. 5, the axle 4 is separated into left and right parts, each of which has a short bolt shape. Axles 4 and 4. That is, the wheel 5 is inserted from the inside of the bearing 10 into the shaft support hole 1 4 is rotatably fitted into the outer protruding portion of the axle 4 which is inserted into the shaft 4, and is displaced by the cap nut 31. The structure has been stopped. In this second embodiment, the middle part of the axle 4 is removed The towing vehicle 1 becomes lighter as much as it is. Further, in the third embodiment of FIG. 6, the axle 4 Are molded integrally with the bearing portion 10, that is, integrally with the chassis 2 by a synthetic tree. The wheels 5 are directly fitted to the short shafts protruding from the chassis 2 on both sides, A cap nut is attached to the screw 27 formed at the tip of the shaft 4 to prevent the screw from slipping off. With this configuration, the number of parts is further reduced and disassembly and assembly is easier. Become. In addition, manufacturing costs are reduced.

[0020]   FIG. 7 shows a fourth embodiment, which is formed on the undercarriage 2 of the first embodiment at four corners of the undercarriage 2. The mounting pin 35 having a male screw at the lower end is screwed into the mounting hole 15 that is formed. It is fixed by the above, and the net 36 is stretched around them. Total weight of chassis 2 A simple luggage compartment can be made without adding much volume.

[0021]   FIG. 8 shows a fifth embodiment in which the chassis 2 itself in the first embodiment is used for loading. As a result, the pipe receiving portion 9 is attached to the front end of the container-like receiving portion. Further, the bearing portion 10 is directly formed on the lower surface thereof. The chassis 2 is thus various Can be molded into the shape and structure.

[0022]   FIG. 9 shows a sixth embodiment, in which the chassis 2 is directly attached to the housing portion (similar to the fifth embodiment). However, it is formed in a box shape and is provided with a similar synthetic resin lid 37. . It is suitable for transportation of food and transportation in rainy weather.

[0023]   The above is an example, and the connecting pipe 3 is made of synthetic resin or stainless steel. Therefore, various modifications are conceivable, such as making the chassis foldable. It is not limited to what you eat. Also, even if it is a towing vehicle, it may be pushed and used by hand. It

[0024]

[Effect of device]

  Since it is lightweight, it can be easily towed and carried, and can be used easily.   Since the number of parts is small and the structure is simple, it is easy to disassemble and assemble.   The chassis, connecting pipes and wheels can be easily disassembled for compact packing and storage. It is possible to reduce the transportation cost because it can be carried out in multiple stages.   Since it does not require advanced technology such as pipe welding in the manufacturing process, it reduces manufacturing costs. Low, while the product quality can be stabilized.

[Brief description of drawings]

FIG. 1 is a perspective view (first embodiment).

FIG. 2 is an exploded perspective view.

FIG. 3 is a front view in longitudinal section of a main part.

FIG. 4 is a plan view seen from the lower surface.

FIG. 5 is a plan view of the main part as seen from the lower surface (second embodiment).

FIG. 6 is a plan view seen from the lower surface of the main part (third embodiment).

FIG. 7 is a perspective view (fourth embodiment).

FIG. 8 is a perspective view (fifth embodiment).

FIG. 9 is a perspective view (sixth embodiment).

[Explanation of symbols]

1 Towing vehicle 2 Chassis 3 Connecting pipe 4 Axle 5 Wheel 9 Pipe receiving part 10 Bearing part 11 Connecting hole

Claims (2)

[Scope of utility model registration request] 1. A chassis including a synthetic resin integrally molded body, a connecting pipe bent in a substantially L shape having a vertical portion and a horizontal portion, and two wheels that are rotatable with an axle.
The chassis has a pipe receiving part with a vertical connecting hole at the front end, and a bearing part that horizontally supports the wheel axle in the horizontal direction on the lower surface side, and the lower part of the vertical part of the connecting pipe is used as the connecting hole of the chassis. It is characterized in that the connecting pipe is pierced from above and fixed to the chassis so as not to be rotatable and detachably attached, the portion below the connecting hole of the connecting pipe is a supporting leg, and the wheel axle is attached to the bearing portion. Towed vehicle. 2. A chassis made of a synthetic resin integrally molded product, a connecting pipe bent in a substantially L shape having a vertical portion and a horizontal portion, and two wheels. The chassis has a vertical connecting hole at a front end. It has a pipe receiving part and short axles that horizontally project horizontally in the center of both sides.The lower part of the vertical part of the connecting pipe penetrates the connecting hole of the chassis from above to make the connecting pipe unrotatable in the chassis. A tow vehicle which is detachably fixed and mounted, and a portion of the connecting pipe below the connecting hole is used as a supporting leg, and wheels are rotatably supported on the axles on both sides of the chassis.