JP2003182571A - Light truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light truck having improved braking performance. <P>SOLUTION: A braking mechanism is constructed by an inwardly opening cylindrical braking surface formed integrally with an iron ring having an outwardly opening tread surface and an inwardly opening flange portion, with its inward diameter smaller than that of the tread surface, and a wide brake pad having a sectionally linear end face in line-contact with the braking surface. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight trolley that travels on a railroad track or the like, and more particularly to a lightweight dolly having a lightweight structure and an improved braking function.

[0002]

2. Description of the Related Art As a conventional light truck of this kind,
There are those shown in FIGS. 22 to 24. Light weight truck 1G
Is a flat plate-shaped carrier 2 made of a plate material, a rectangular frame 3 that extends in the left-right and front-rear directions to support the carrier 2, and an iron wheel 4 that rolls the truck 1G on the track R via a bearing 13 below the frame 3. , A brake mechanism C for pressing the flange portion 4b of the existing iron wheel 4 so as to prevent the iron wheel 4 from rolling.
An operation rod 11 for operating and braking the brake mechanism C from either the front or the rear of the light truck 1G, and a rod 13a for operating the brake 6 by operating the operation rod 11.
13b and the drive member 8. A rod support member 17 that supports the operating rod 11 is pivotally supported by a rotation shaft 17a on a bracket 10 fixed to the frame 3, is L-shaped, and has the operating rod 11 inserted at one end and coupled to the drive member 8 at the other end. The drive rod 13a to be fixed is fixed. The brake mechanism C includes a flange portion 4b of the iron wheel 4, and a brake 6 at the lower end of the drive member 8 toward the flange portion 4b of the iron wheel 4. The brake mechanism C is provided on one of the four iron wheels. Brake 6
Consists of a brake pad 6e and a pad support portion 6f.
The brake pad 6e is on the side surface side of the existing iron wheel, and
The structure in contact with the flange portion 4b of the iron wheel 4 is adopted.
The operating rod 11 is arranged on the front and rear side surfaces (in this example, the right side) of the lightweight truck 1G, and the brake can be removed from either side. It can also be pushed. A spring 14 is installed on the upper end of the drive member 8 so as to constantly press the brake pad 6e against the flange portion 4b of the iron wheel 4. There are 13 rods connected to the front and rear rod support members 17.
a and 13b are arranged such that the operating rods 11 are opposed to each other, and the ends of the rods have rotating shafts 17a and 17b so as to operate symmetrically.
On the contrary, they are arranged in the upside down position. This lightweight truck 1G has a structure in which the brake is always applied. Light weight truck 1
Unlike general trucks, G is small, simple and lightweight.

To move the light truck 1G, refer to FIG.
In FIG. 2, when one operation rod 11 (in this case, the rear side) is rotated in the arrow direction against the force of the spring 14 around the rotation shaft 8ca, the rod 13a (the other operation rod also rotates in the arrow direction), 13b pushes the drive member 8 into the shaft 8
The brake 6 rotates counterclockwise about c and separates from the flange portion 4b of the iron wheel 4. Therefore, light truck 1
G can roll on the orbit R. When you release the control rod 11,
The force of the spring 14 acts, and the drive member 8 rotates clockwise around the shaft 8c to move the brake 6 to the flange portion 4 of the iron wheel 4.
Press b.

[0004]

[Problems to be Solved by the Invention] This lightweight truck 1G
Is a structure in which the brake 6 is applied to one iron wheel 4, and the brake 6 is formed so as to be applied to the flange portion 4b which is the outer end of the iron wheel so that the braking effect is as low as possible and the braking effect is enhanced. Further, the iron wheel 4 uses an existing iron wheel as it is, and the iron wheel 4 does not originally have the structure in which the brake 6 is applied by the flange portion 4b. Rather, the outer periphery of the flange 4b is formed into a curved surface so that the wheel 4 can easily roll on the track R. Brake pad 6 for this brake
As shown in FIG. 24, e has a shape along the outer circumference of the flange portion 4b having a curved surface, and therefore has point contact in the cross section and does not fulfill a sufficient braking function. Moreover, the pad surface is shaped so as to follow the complicated curved surface of the flange portion, which makes manufacture difficult.

Further, since the two surfaces of the loading platform are uniformly flat, there is a risk that the loading platform may move during traveling and fall from the loading platform depending on the article to be loaded on the loading platform.

Further, the brake performance is unsatisfactory because it has a structure in which the brake acts only on one of the iron wheels. The present invention aims to provide a lightweight dolly for solving the above-mentioned drawbacks.

[0007]

In order to achieve the above-mentioned object, a lightweight dolly according to the present invention as set forth in claim 1 is provided with an iron wheel which is integral with an axle rolling on a raceway and which is attached to a lower portion of a frame through a bearing in the front-rear direction. It is rotatably arranged to the left and right, has a flat plate carrier on the frame, and is equipped with a brake mechanism near the iron wheels or axles that constantly prevents rolling of the iron wheels. In a lightweight dolly equipped with an operating rod to release the brake mechanism, the brake mechanism is formed integrally with an iron wheel having a tread surface with an opening on the outside and a flange part with an inward opening. Braking surface of
It is characterized in that the end surface in contact with the braking surface is composed of a wide brake pad having a linear cross section and in line contact.

In the light truck trolley according to the invention of claim 2, an iron wheel integrated with an axle rolling on the track is disposed in the lower part of the frame rotatably in the front-rear and left-right directions via a bearing, and a flat plate carrier is mounted on the frame. In a lightweight truck that has a brake mechanism that constantly prevents rolling of the iron wheel near the iron wheel or the axle, and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame. A tubular braking surface integrally formed on an iron wheel having a tread surface having an opening on the outside and a flange portion having an opening on the inside, and extending linearly inward.
It is characterized in that the end surface in contact with the braking surface is composed of a wide brake brake pad having a linear cross section and in line contact.

According to the third aspect of the present invention, the light truck is provided with an iron wheel integrated with an axle that rolls on the track, which is rotatably arranged in the front and rear and right and left at the bottom of the frame via bearings. In a lightweight truck that has a brake mechanism that constantly prevents rolling of the iron wheel near the iron wheel or the axle, and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame. A tubular braking surface integrally formed on an iron wheel having a tread surface having an opening on the outside and a flange portion having an opening on the inside, and extending linearly inward.
It is characterized in that the end surface in contact with the braking surface is composed of a wide brake brake pad having a linear cross section and in line contact.

According to a fourth aspect of the present invention, there is provided a light-weight dolly, in which an iron ring integrated with an axle rolling on a track is disposed in a lower portion of a frame so as to be rotatable front and rear and left and right, and a flat plate carrier is mounted on the frame. In a lightweight truck that has a brake mechanism that constantly prevents rolling of the iron wheel near the iron wheel or the axle, and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame. Is configured by a disc brake including a disc wheel provided on an axle and brake pads that sandwich and separate both side faces of the disc wheel.

A plurality of brake mechanisms according to the invention of claim 5 are provided.

According to a sixth aspect of the present invention, there is provided a light-weight dolly, wherein a luggage drop prevention device is provided on the luggage carrier.

In the baggage drop prevention device according to the invention of claim 7, an auxiliary base for expanding or storing via a hinge or the like is provided on the left and right or front and rear side portions of the cargo bed so that the cargo bed surface can be enlarged when necessary. It is characterized in that it is formed.

The baggage drop prevention device according to the present invention is characterized in that a step portion is provided on the peripheral edge of the back surface of the luggage carrier so that the luggage carrier can be used on both sides.

According to a ninth aspect of the present invention, there is provided a baggage drop prevention device characterized in that a hook for hooking a plurality of ropes is provided on a peripheral edge of a cargo bed.

According to a tenth aspect of the present invention, there is provided a baggage drop prevention device which is detachably provided at least in front of and behind the luggage carrier. The luggage carrier is clamped from both sides and a screw is engraved at each end. A base frame body having a protrusion having a groove on the edge,
An intermediate frame body located between the base frame bodies and engraved with screws on both ends,
The present invention is characterized in that the supporting frame body is composed of a screw member for connecting the base frame body and the intermediate frame body, and a rod member having both ends fitted in the recessed grooves of the projection.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a lightweight dolly according to the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 13 relate to improvement of the braking function of a lightweight dolly, which is a feature of the present invention, and FIGS. 14 to 21 are for preventing articles from falling from the cargo bed of the lightweight dolly. 1 to 5 show a first embodiment of a brake mechanism of the present invention, FIG. 1 is an overall side view of a truck, FIG. 2 is a sectional view taken along line I-I of FIG. 1, and FIG. 3 is line II-I of FIG.
4 is a sectional view taken along line III-III of FIG. 3, FIG. 4 is a diagram in which the iron wheel is braked, and FIG. 5 is a diagram in which the brake is removed from the iron wheel. 6 and 7
Is a second embodiment of the brake mechanism of the present invention, FIG. 6 is an overall side view of the dolly, and FIG. 7 is a sectional view taken along line IV-IV of FIG. 8 to 10 show a third embodiment of the brake mechanism of the present invention, FIG. 8 is an overall perspective view for explaining a lightweight dolly, FIG. 9 is a sectional view taken along line VV of FIG. 8, and FIG. 10 is a braking surface of an axle. FIG. FIG. 11 shows a fourth embodiment of the brake mechanism. 12 and 13 show a fifth embodiment of the brake mechanism, FIG. 12 is an overall perspective view for explanation, and FIG. 13 is a general sectional view of a disc brake. 14 to 16 show a first embodiment of the baggage drop prevention device according to the present invention. FIG. 14 is a partial perspective view of FIG.
5 is a VI-VI sectional view of FIG. 14, and FIG. 16 is VI of FIG.
It is an I-VII sectional view. FIG. 17 shows a second embodiment of the baggage drop prevention device of the present invention, FIGS. 18 to 21 show a third embodiment of the baggage drop prevention device of the present invention, FIG. 18 is an overall perspective view, and FIG. 20 is an exploded view of the apparatus, and FIG. 21 is an elevated view obtained by adding a long leg screw to FIG.

In the first embodiment, reference numeral 1A in FIG. 1 is a lightweight dolly truck of the first embodiment, which comprises a cargo bed 2, angular frames 3 extending in the front-rear direction provided on both sides for supporting the cargo bed 2, and below each frame 3. The bearing 5 includes a bearing 5 that hangs on the axle and receives the axle 12 at the lower end, an iron wheel 4 that rotates integrally with the axle 12, and a brake mechanism A1. As shown in FIG. 2, the iron wheel 4 is integrally formed with a tread surface 4a which is open outward, a flange portion 4b which is open inward, and a cylindrical braking surface 4c which is open inward and has a diameter smaller than that of the tread surface 4a. There is. In the iron wheel 4, the track R contacts the tread surface 4a and the flange portion 4b. The reason why the braking surface 4c formed on the iron wheel 4 is smaller in diameter than the tread surface 4a is that the braking surface 4c does not interfere with the other retracting track R at the branch point of the track R. The brake mechanism A1 may be provided as a single iron wheel 4, but in this embodiment, a so-called plural number provided in front and rear two iron wheels 4 out of the four iron wheels 4 is expected in order to improve the braking performance. Typed. The brake mechanism A1 has a structure for braking the right front iron wheel 4 and is arranged in front of the front iron wheels 4 in this example, and the brake 6 presses the side surface of the braking surface 4c of the iron wheel 4. The brake mechanism A1 is, as shown in FIG.
It is composed of the braking surface 4c of the iron wheel 4, the brake pad 6a, and the brake 6 including the brake pad support portion 6b. The brake mechanism A1 is pivotally supported on the operating rod 11, the rod 13a, and the fixed portion 3a hanging from the frame 3.
It is operated by the drive member 8 which is operated by. Further, at the front and rear ends of the frame 3, a rod supporting member 17 having a tubular portion into which an operating rod 11 which rotates via a bracket 10 is inserted is pivotally supported, and the rod supporting member 17 and the driving member 8 are connected to each other by the rod 1.
It is formed to be interlockable via 3a. The front and rear drive members 8 are formed so as to be interlocked with each other via an intermediate rod 13c. Furthermore, the brake pad 6a fixed to the driving member 8 is constantly pressed against the braking surface 4c of the iron wheel 4 by the one driving member 8 (the rear driving member in this example) and the fixed portion 3a fixed to the frame 3. A spring 14 is installed on the. The rotary shaft 17a of the rod support member 17,
The positional relationship between the ends of the rods 13a and 13b connected to 17b is different in the front and rear. That is, the end of the rear rod 13a is located below the rotary shaft 17a, and the end of the front rod 13b is located above the rotary shaft 17b. As shown in FIG. 3, the brake pad 6a contacts the braking surface 4c of the iron wheel 4 with a flat cross section. In the figure, 40 is a working device, and 41 is a stopper for fixing the working device.

The operation of the first embodiment will be described. In the light truck 1A that is not operated by a person, the brake 6 is always applied to prevent the iron wheel 4 from rolling on the orbit R. That is, as shown by the solid line in FIG. 1, the drive member 8 is rotated clockwise about the shaft 8c by the force of the spring 14 to press the brake pad 6a against the braking surface 4c formed inside the iron wheel 4. There is. In order to roll the lightweight dolly 1A on the track R, one of the operation rods 11 (for example, the left rear operation rod) is pushed toward the arrow (rotation), and the operation rod 11 is rotated by the shaft 17.
Rotating clockwise around a, the drive member 8 rotates counterclockwise around the rotating shaft 8c against the force of the spring 14 and the rod 13a separates the brake pad 6a of the drive member 8 from the braking surface 4c. To do. In this case, the other operation rod (the operation rod on the right front part) is also interlocked and rotated in the arrow direction. Therefore, the brake 6 is released and the lightweight truck 1A moves. In order to maintain the movement, the operating rod 11 must be continuously pushed in the arrow direction. When the operating rod 11 is released, the force of the spring 14 acts and the brake 6 is applied and stopped. The lightweight dolly 1A of the present invention has a large area in contact with the braking surface 4c of the brake pad 6a, and the braking surface 4c is a simple circumferential surface, and the contact portion of the brake pad 6a is in surface contact, so that the braking performance is further improved. To do. Further, the end surface of the brake pad 6a does not have a complicated shape, and the manufacture is simple.

The brake mechanism A2 of the lightweight truck 1B of the second embodiment has a cylindrical braking surface in which the outer periphery of the conventional flange portion 4b of the iron wheel 4 is linearly extended inward as shown in FIGS. 4d and a brake contacting the braking surface 4d. In the brake mechanism A2, the brake pad 6a contacts the braking surface 4d formed by horizontally extending the flange portion 4b of the iron wheel 4 inwardly to prevent the iron wheel 4 from rolling.
The brake pad that is in contact with the braking surface 4d can be formed wide so that the end surface has a linear cross section and is in line contact. The driving member 8b of the brake mechanism A2 of this embodiment is provided between the front and rear iron wheels 4 unlike the parallel arrangement of the first embodiment. Therefore, the intermediate rod 13c connecting the drive member 8b
Is obliquely arranged with respect to the rotation axis 8c of the drive member 8b. Since the iron wheel 4 has a structure in which the flange portion 4b is horizontally extended, the iron wheel is easier to manufacture than the first embodiment. Further, since the brake is brought into contact with the outermost end of the iron wheel 4, the braking performance can be expected more.

The operation of the second embodiment will be described. The light truck trolley 1B is always provided with a brake 6 so that the iron wheel 4 does not roll on the track R. That is, as shown by the solid line in FIG.
Each brake pad 6b is attached to the braking surface 4 of the flange 4a.
It is touching and pressing d. To release the brake 6 from this state, either the front or rear operating rod 11
When the arrow 13 is pressed against the four forces, the rod 13a moves, the drive member 8 rotates, and the brake pad 6b can be rolled away from the extended braking surface 4d of the flange portion. In this case, the interlocking intermediate rod 13c also separates the other brake pad 6b from the braking surface 4d in the opposite direction. In the braking surface 4d of the embodiment, the curved surface of the flange portion is further extended to form a flat surface, and the braking surface is pressed by the brake pad 6b having a flat end surface. Therefore, since the brake pad 6b contacts the outermost peripheral surface of the iron wheel 4, the brake pad 6b is aimed at the maximum braking performance as in the case of contacting the conventional flange portion 4b. Moreover, the braking surface 4d has a flat cross section, and the end surface of the braking pad 6b contacting the braking surface 4d also has a flat cross section, so that the number of contact surfaces of the brake pad 6b can be increased, and more braking performance can be obtained.

The brake mechanism A3 of the light truck 1C of the third embodiment is provided not on the iron wheel 4 as shown in FIGS. 8 and 9, but on the axle 12 integrated with the iron wheel 4. Therefore, as the iron wheel 4, the conventional type is used as it is. Lightweight truck 1 of this embodiment
The brake mechanism A3 of C has a structure in which a cylindrical braking portion 12c fixed to the axle 12 is provided, and the brake pad 6a is in contact with the braking surface 12c. The center frame 3a is fixed between the both side frames 3 by the horizontal frame 16, and the braking portion 1 is mounted on the axle 12 near the center frame 3a.
2c is provided. Also in this example, a plurality of brake mechanisms A3 are arranged at the front and rear.
It is shown by the structure provided with. Of course, the brake mechanism A3 may be single. A rod support member 17 is rotatably supported on one side (right side in this example) on the front and rear sides of the lightweight dolly 1C through a bracket 10, and the bracket 1 is attached to the center frame 3a.
The guide members 18a and 18b are rotatably supported by the shaft 0a. The rod support member 17, the guide member 18, and the connecting shaft 19 are integrated and rotate together. Rods 13a and 13b are connected to the guide members 18a and 18b. Front and rear guide members 1
The rods 13a and 13b connected to 8a and 18b are opposite to the connecting shaft 19, that is, the rear part is located below and the front part is located above. The spring 14 is installed on the guide member 18b at the front. Axle 12 before and after the center frame 3a
In the vicinity, each hanging support member 20 is fixed, each drive member 8c is pivotally supported on this support member 20, and a brake pad 6b is provided at the lower end of the drive member 8c. The brake pad 6b presses the braking surface 12c. The axle 12 has a cylindrical braking surface 12c. The braking surface 12c can be widened, and the brake pad 6b can be widened, which is advantageous in that the braking range can be widened. The operation of the brake mechanism A3 is the same as that of the above-described embodiment, and will be omitted. The front and rear drive members 8 are connected by an intermediate rod 13c.

The lightweight truck 1D of the fourth embodiment is shown in FIG.
As shown in FIG. 7, a plurality of brake mechanisms A4 are set on the left and right of one of the front and rear axles. Operating rod 11
The connection between the rod 13, the rod 13 and the drive member 8 is shown in FIG.
It is the same as and omitted. The only difference is the left and right drive members 8
The connecting shaft 21 connecting the two and the driving member 8 are fixed, and the driving member 8 rotates integrally with the driving member 8. As shown in FIG. 11, the brake mechanism A4 has a braking surface 4c, which is smaller in diameter than the tread surface and is opened inwardly of the flange portion 4b like the iron wheel 4 of the first embodiment. The brake mechanism A4 is the same as that of the first embodiment and has the same operation, so that it is omitted. The brake mechanism A4 is provided by another method, for example, as in the second embodiment.
The flange portion 4b of the iron wheel 4 may be extended and formed on the braking surface 4d.

The lightweight dolly 1E of the fifth embodiment is shown in FIG.
As shown in FIG. 2 and FIG. 13, while the brake pads are in contact with the circumferential surface of the iron wheel in all of the previous embodiments, the disc wheel 22 is fixed to the axle and the brake pads 23b are mechanically attached from both side faces of the disc wheel 22. A so-called known disc brake mechanism 24 that presses is adopted. The operating rod 11, the connecting shaft 17a, the guiding member 18, the supporting member 17, the bracket 10 and the center frame are the same as those in the fourth embodiment, and will be omitted. Further, the disc brake mechanism 24 is a known mechanical disc brake, and its structure and action are omitted.

Next, a baggage drop prevention device in which a baggage does not drop from a luggage carrier of a light truck will be described. 15 to 1
7 is a first embodiment of the baggage drop prevention device B1 of the present invention, in which a foldable auxiliary table 25 is provided on the front, rear, left and right sides of the cargo table 2 fixed to the frame 3. Normally, they are stored in the front, rear, left and right side portions of the luggage carrier 2, and the auxiliary platform 25 is opened and used when necessary. The loading platform 2 and the auxiliary platform 25 are supported by a hinge 26 and a rotation stopper 27 which are arranged at appropriate intervals. The rotation stopper 27 has a rotation shaft 28 which is perpendicular to the luggage carrier 2, and rotates to project to the side surface from the luggage carrier 2 when expansion is necessary.
The auxiliary table 25 is supported. In the figure, 28a is a bracket provided on the back surface of the loading platform 2 that supports the rotating shaft 28. When the auxiliary table 25 is unnecessary, the auxiliary table 25 is rotated and stored in the side edge of the folding cargo table 2. In this case, the auxiliary table 25 must be provided at a position where it does not interfere with the iron wheel 4 when it is stored. Auxiliary stand 2
The number 5 is required, for example, when the luggage is protruding from the luggage carrier.

Next, a second embodiment of the baggage drop prevention device B2 of the present invention will be described with reference to FIG. The luggage carrier 2 has a structure in which the front surface 2a and the back surface 2b of the luggage carrier 2 are interchanged with respect to the frame 3. The front surface 2a of the loading platform 2 is formed into a flat plate, and the back surface 2b is formed of a flat plate and has a stepped portion 29 which is higher than the entire circumference or one of front, rear, left and right ends. Further, a hook 30 for hooking a rope such as a rope or a rope is provided on the loading platform 2 in front of the step portion 29. Although not shown, the loading platform is replaced on the front surface or the back surface, and is detachably fixed to the frame 3 using fastening means such as bolts and nuts. In this example, the step portion 29 serves as a stopper so that the luggage does not move and fall from the luggage carrier 2 while the lightweight truck is rolling on the track. Further, a hook 30 may be provided to prevent the luggage from moving, and a rope may be hooked on the hook 30 to fix the luggage. The hook 30 may be provided with the step portion 29 on the back surface as in this embodiment, or only the hook 30 may be provided on the front surface and the back surface.

A third embodiment of the baggage drop prevention device B3 of the present invention will be described with reference to FIGS. In this example, the carrier 2 is left as it is, and a support frame 32 which is a separate body is attached to the carrier 2. One set of support frames 32 is shown in FIG.
As shown in FIG. 20, two base frame bodies each having a U-shape and integrally formed with a protrusion 33a having a U-shaped groove at the upper surface edge, and having a cylindrical shape with female screws engraved at each end. 33, two intermediate frame bodies 34 that are arranged and connected between the base frame bodies 33, and are integrated with female screws engraved at both ends, and the intermediate frame bodies 34 and the base frame bodies are adjusted in length and connected to each other. The rod member 36 is composed of individual screw members 35, and further has a bent end portion that is fitted into a protrusion that connects the support frames. The rod member may have a simple rod shape. The vertical spacing of the U-shaped parallel base frames 33 is set to the thickness of the cargo platform 2 and the frame 3 of the lightweight truck.
Several kinds of thickness are set in advance, and the base frame 33 having an appropriate thickness is used. FIG. 18 shows a usage state. Usually, two support frame bodies 32 are provided in front of and behind the luggage carrier 2. As an example of the attachment, the base frame 33 and the lower intermediate frame 34 are connected via a screw member 35, and the cargo bed 2 and the frame 3 are inserted from one side of the cargo bed 2 so as to sandwich the cargo bed 2. A base frame 33 to which the other lateral length adjusting screw member 35 is connected is also inserted so as to sandwich the luggage carrier 2 and the frame 3, and the intermediate frame 34 and the base frame member 33 are connected to each other. The frame bodies 34 are connected via the screw members 35, the upper and lower intermediate frame bodies 34 are alternately connected, and the nuts 35 a are used for fastening and fixing. Screw member 3
Since 5 is in the connection between the intermediate frame 34 and the base frame 33,
Not too long. After mounting the pair of front and rear support frames 32, the rod members 33a are fitted into the U grooves of the protrusions 33a formed on the edges of the base frames 33 on both sides to cover the periphery of the luggage carrier 2. FIG. 18 shows a state in which the support frame 32 is attached to the luggage carrier 2 of the lightweight dolly. If the support frame 32 cannot be sufficiently fixed to the loading platform 2 even if it is tightened, a screw hole 33b is bored in the base frame 33 as shown in FIG. 21, and a foot long screw 36 having a flat end is screwed into the screw hole 33b. Screwed into the support frame 32
May be fixed to the luggage carrier 2. Since the periphery is covered, the luggage is prevented from moving by the support frame 32, and the luggage is prevented from falling. If a small luggage is to be placed, one of the support frames 32 may be moved toward the center of the luggage carrier 2, or the support frame 32 may be further provided between the support frames 32 to provide a small area. May be formed.

[0029]

Since the present invention has the above-mentioned functions, it has the following effects.

As the brake mechanism, a cylindrical braking surface that is open to the inside of the iron wheel is provided, or a cylindrical braking surface that extends linearly inward of the flange portion of the iron wheel is provided and the end portion of the brake pad is provided. Since the cross section is formed in a plane, the braking surface of the brake is widened, and the cross section is entirely in line contact, so that the braking effect is further improved. Further, the contact of the pads is uniform, the wear is reduced, and the shape of the brake pad is simplified to facilitate the manufacture.

Since the iron wheel is improved to have a cylindrical braking surface and the interior is made into a space, the weight and strength of the iron wheel can be reduced.

As the brake mechanism, the brake is formed so as to be received by the axle from the iron wheel, and the end portion of the brake pad is formed in the plane of the cross section, so that the braking surface of the brake is widened.
The cross-section is line contact and the whole is surface contact, and the braking effect is further improved. Further, the contact of the pads is uniform, the wear is reduced, and the shape of the brake pad is simplified to facilitate the manufacture.

Since the stepped portion or the support frame is provided on the back surface of the luggage carrier, there is no fear of dropping articles when the light truck is rolling.

[Brief description of drawings]

FIG. 1 is an overall side view of a lightweight dolly according to a first embodiment of the present invention. ,

FIG. 2 is a cross-sectional view taken along the line II of FIG.

3 is a sectional view taken along line II-II of FIG.

FIG. 4 is a cross-sectional view taken along the line III-III of FIG. 3, showing a state where the iron wheel is braked.

5 is a cross-sectional view taken along the line III-III of FIG. 3, showing a state where the iron wheel is braked.

FIG. 6 is an overall side view showing a lightweight dolly according to a second embodiment of the present invention.

7 is a sectional view taken along the line IV-IV in FIG.

FIG. 8 is an overall perspective view showing a main part of a lightweight dolly according to a third embodiment of the present invention.

9 is a sectional view taken along line VV of FIG.

FIG. 10 is an elevational view showing a braking surface of an axle.

FIG. 11 is an overall perspective view showing a main part of a lightweight dolly according to a fourth embodiment of the present invention.

FIG. 12 is an overall perspective view showing a main part of a lightweight dolly according to a fifth embodiment of the present invention.

FIG. 13 is a general sectional view of a disc brake.

FIG. 14 is a partial perspective view showing the luggage fall prevention device according to the first embodiment of the present invention.

15 is a sectional view taken along line VI-VI in FIG.

16 is a sectional view taken along line VII-VII in FIG.

FIG. 17 is an overall perspective view showing a second embodiment of the baggage drop prevention device of the present invention.

FIG. 18 is an overall perspective view showing a third embodiment of the baggage drop prevention device of the present invention.

FIG. 19 is an elevational view of a luggage drop prevention device according to a third embodiment.

FIG. 20 is an exploded view of the luggage fall prevention device of the third embodiment.

FIG. 21 is an elevation view in which long leg screws are further added.

FIG. 22 is an overall side view of a conventional lightweight dolly.

FIG. 23 is a sectional view taken along the line VIII-VIII of FIG. 22.

FIG. 24 is a sectional view taken along line IX-IX in FIG. 23.

[Explanation of symbols]

1A, 1B, 1C, 1D, 1E Light weight truck A1, A2, A3, A4, A5 Brake mechanism B1, B2, B3 Baggage drop prevention device 2 loading platform 3 frames 3a Fixed part Four wheels 4a tread 4b Flange part 4c Braking surface 6 brakes 6a brake pad 6b Brake pad support 8 drive members 10 bracket 11 control rod 12 axles 13, 13a, 13b rod 13c Intermediate rod 14 spring 16 horizontal frame 17 Rod support member 17a, 17b rotating shaft 18 Induction member 19 Connection shaft 20 Support member 22 disc wheels 23b brake pad 24 disc brake mechanism 25 Auxiliary stand 26 Hinge 27 rotation stopper 28 rotation axis 28a bracket 29 Step 30 through holes 32 Support frame 33 Base frame 33a protrusion 34 Intermediate frame 35 screw member 35a nut 36 bar members 37 foot long screw 40 working equipment 41 Stopper

Claims (10)

[Claims] 1. An iron wheel integral with an axle rolling on a track is rotatably arranged in the lower part of the frame in the front-rear and left-right directions through a bearing, and a flat plate carrier is arranged on the frame near the iron wheel or near the axle. In a lightweight dolly equipped with a brake mechanism that constantly prevents the rolling of iron wheels, and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame, the brake mechanism has a tread with an opening on the outside and an inward direction. Consists of a cylindrical braking surface that is smaller in diameter than the tread and has an inward opening, and a wide brake pad that is in linear contact with the end surface that contacts the braking surface and that is formed integrally with the iron wheel that has the opening flange portion. A lightweight dolly that is characterized. 2. An iron wheel integrated with an axle rolling on a track is rotatably arranged in the lower part of the frame in the front-rear and left-right directions via bearings, and a flat plate carrier is arranged on the frame near the iron wheel or near the axle. In addition, in a lightweight truck that has a brake mechanism that constantly prevents the rolling of iron wheels and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame, the brake mechanism is Consists of a cylindrical braking surface that is formed integrally with an iron wheel that has a flange portion with a one-way opening and extends linearly inward, and a wide brake brake pad whose end surface in contact with the braking surface has a linear cross section and makes line contact. A lightweight dolly that is characterized. 3. An iron wheel integrated with an axle rolling on a track is rotatably arranged in the lower part of the frame in the front-rear and left-right directions through a bearing, and a flat plate carrier is arranged on the frame near the iron wheel or near the axle. In addition, the brake mechanism is formed on the axle in a lightweight dolly equipped with a brake mechanism that prevents rolling of iron wheels on a daily basis and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame. A lightweight dolly comprising a braking surface and a wide brake pad whose end surface in contact with the braking surface has a linear cross section and makes line contact. 4. An iron wheel, which is integral with an axle rolling on a track, is rotatably provided in the lower part of the frame in the front-rear and left-right directions via bearings, and a flat plate carrier is provided on the frame, near the iron wheel or near the axle. In addition, in a lightweight dolly equipped with a brake mechanism that constantly prevents the rolling of iron wheels and an operating rod that releases the braking of the brake mechanism in conjunction with the front and rear of the frame, the brake mechanism is a disc wheel that is installed on the axle. , A lightweight dolly characterized by being configured with a disc brake having a brake pad that holds and separates both sides of the disc wheel. 5. The lightweight dolly according to claim 1, wherein a plurality of brake mechanisms are provided. 6. The lightweight dolly according to claim 1, wherein a luggage drop prevention device is provided on the luggage carrier. 7. The luggage drop prevention device is characterized in that an auxiliary platform for expanding or storing via a hinge or the like is provided on the left and right or front and rear side portions of the luggage carrier, and the luggage carrier surface is formed to be expandable when necessary. The lightweight dolly according to claim 6. 8. The luggage drop prevention device according to claim 6, wherein the luggage carrier is detachably attached to the frame, and a step portion is formed on a peripheral edge of a back surface of the luggage carrier so that both sides of the luggage carrier can be used. Lightweight truck as described. 9. The lightweight dolly according to claim 6, wherein the luggage drop prevention device is provided with a hook for hooking a plurality of ropes on the periphery of the luggage carrier. 10. The baggage drop prevention device is provided in a detachable manner at least at the front and rear of a luggage carrier, and is a U-shaped groove for sandwiching the luggage carrier or the like from both sides and engraving a screw at each end, and having a concave groove on the upper surface edge portion. A base frame having a protrusion formed with, a middle frame having a screw between both ends of the base frame, a screw member connecting the base frame and the intermediate frame, and both ends of the protrusion. 7. A supporting frame body comprising a rod member fitted in the groove, and is positioned.
Lightweight truck as described.