JP6902262B2 - Tow truck - Google Patents

Description

The present invention relates to a towing carriage that can be towed by a towing vehicle.

Conventionally, a towing trolley has been used in a production factory or the like in order to efficiently transport a load. This tow truck is generally equipped with a braking mechanism that brakes the wheels to prevent the tow truck from moving for the purpose of safely performing cargo handling work by the operator.

By the way, as a structure for operating the braking mechanism for braking the wheels of the towing carriage, for example, it is conceivable to use the structure of the connecting frame as in Patent Document 1. The towed vehicle disclosed in Patent Document 1 includes a main body frame on which a small vehicle or the like can be mounted. A pair of wheels are attached to the middle part of the main body frame so as to be separated from each other in the vehicle width direction, and a braking mechanism is attached to the inside of each wheel. Each one end portion of a pair of wire members is connected to each braking mechanism, and when both wire members are moved to the front side of the vehicle, each braking mechanism releases the braking of each wheel, while both wire members are released after the vehicle. When moved to the side, each braking mechanism brakes each wheel. The other end of each wire member is connected to a connecting frame slidably attached to the main body frame in the towing direction, and when the towing vehicle pulls the towed vehicle through the connecting frame, the connecting frame. Slides forward with respect to the main body frame and each wire member moves to the front side, so that each braking mechanism releases the braking of each wheel and the towed vehicle moves forward, while when the towing vehicle stops, the connecting frame is released. By sliding backward with respect to the main body frame and moving each wire member to the rear side, each braking mechanism brakes each wheel and the towed vehicle stops.

Japanese Unexamined Patent Publication No. 2000-17801

However, in Patent Document 1, since the braking mechanism is operated by the sliding operation in the towing direction of the connecting frame, if the structure of the connecting frame as in Patent Document 1 is applied to the structure for operating the braking mechanism of the towing carriage, the cargo handling work is performed. When the towing vehicle suddenly moves forward, the towing vehicle may move accordingly, and the operator may not be able to safely carry out cargo handling work.

The present invention has been made in view of these points, and an object of the present invention is a towing carriage capable of operating a braking mechanism by a connecting frame and safely performing cargo handling work by an operator. Is to provide.

In order to achieve the above object, the present invention is characterized in that the moving direction of the connecting frame when operating the braking mechanism is devised.

Specifically, the following solutions were taken for towing carts that can be towed by towing means.

That is, in the first invention, a trolley main body on which luggage is placed, a plurality of casters attached to the lower surface of the trolley main body, and one of the brake side wire members attached to at least two of the casters. A braking mechanism configured to release the braking state of the wheels of the caster by moving to the side, while braking the wheels of the caster by moving the brake side wire member to the other side, and the trolley body. A connecting frame provided on the front side in the traction direction and connectable to the traction means is provided, and the connecting frame is connected to the brake side wire member via an operation side wire member and a slide unit , and the trolley main body. At least one of a sliding operation and a rotating operation in the vertical direction with respect to the brake is provided so that when the brake side wire member is slid upward or downward or rotated to one side, the brake side wire member is moved to one side. while allowing moved or slid to the other of the upper and lower, or when rotating the other side, which is configured to move the brake-side wire member on the other side, the slide unit, the operation It has a slide body in which the side wire member and each brake side wire member of each braking mechanism attached to at least two casters are engaged with each other, and slides the connecting frame either upward or downward. Alternatively, when rotating to one side, the operation side wire member moves to one side, and the slide body moves to one side, so that each brake side wire member moves to one side. On the other hand, when the connecting frame is slid to either the upper side or the lower side or rotated to the other side, each brake side wire member moves to the other side, and the slide body moves to the other side. By doing so, the operation side wire member moves to the other side .

In the second invention, in the first invention, one end of the connecting frame is provided with a shaft portion extending in the vehicle width direction, while the other end is provided with a connecting portion that can be connected to the traction means. The trolley body is provided with a support portion that supports the shaft portion so that the connecting frame can slide in the vertical direction and can rotate around the shaft portion. When the connecting frame is in a posture extending in the vertical direction, the shaft portion moves to either the upper side or the lower side and fits, while when the connecting frame is not in a posture extending in the vertical direction, the shaft portion of the shaft portion is fitted. A fitting restricting portion that regulates the movement of either the upper side or the lower side is provided, and when the shaft portion moves away from the fitting restricting portion, each of the brake side wire members moves to one side while moving to one side. The brake side wire member is configured to move to the other side when the shaft portion moves to the fitting restricting portion in the fitting direction.

In the third invention, in the first or second invention, the operation handle provided on the trolley body is further provided, and the operation handle is provided with respect to the gripping frame supported by the trolley body and the gripping frame. The operation lever is connected to the slide body via a wire member different from the operation side wire member, and is connected to the slide body separately from the operation of the connecting frame. It is characterized in that the slide body is operated to move each brake side wire member to one side or the other side, respectively.

In the first invention, the tow truck is switched between the movement restricted state and the movement allowable state by the sliding operation of the connecting frame in the vertical direction or the rotating operation. Therefore, the operator can operate the braking mechanism in the towing carriage by moving or rotating the connecting frame in the vertical direction. Further, since the operation of the connecting frame when operating the braking mechanism is a sliding operation in the vertical direction or a rotating operation, the towing vehicle will suddenly move forward when carrying out cargo handling work in a movement restricted state. Even so, the connecting frame does not slide in the towing direction with respect to the bogie body. Therefore, since the tow truck maintains the movement restricted state, the operator can safely perform the cargo handling work.

In the second invention, when the connecting frame is rotated toward the front side of the towing carriage to extend in the towing direction, the towing carriage can be towed by the towing means. On the other hand, if the connecting frame is rotated to the rear side of the towing trolley to extend in the vertical direction, the entire towing trolley becomes compact, so that the operator can effectively utilize the space around the towing trolley for cargo handling work. It can be carried out. Further, since the connecting frame cannot slide in the vertical direction when the connecting frame extends in the towing direction, it is possible to prevent the towing carriage from being suddenly restricted from moving. On the other hand, when the connecting frame extends in the vertical direction, the connecting frame can be slid in the vertical direction so that the shaft portion fits in the fitting restricting portion. Can be.

It is a perspective view of the tow truck which concerns on embodiment of this invention. FIG. 2 is a view taken along the line II of FIG. It is a figure corresponding to FIG. 2 which shows the state which the braking of a wheel by a braking mechanism is released. It is an IV arrow view of FIG. It is a V arrow view of FIG. It is an enlarged view of the VI part of FIG. FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 6 is a view corresponding to FIG. 6 showing a state in which the braking of the wheels by the braking mechanism is released by operating the connecting frame. FIG. 5 is a cross-sectional view taken along the line IX-IX of FIG. It is a figure which shows the state which the connecting frame is rotated forward. FIG. 5 is a cross-sectional view taken along the line XI-XI of FIG. FIG. 4 is a view corresponding to FIG. 4 showing a state in which the braking of the wheels by the braking mechanism is released by operating the connecting frame. FIG. 5 is a view corresponding to FIG. 5 showing a state in which the braking of the wheels by the braking mechanism is released by operating the connecting frame. It is an enlarged view of the XIV part of FIG. FIG. 4 is a view corresponding to FIG. 4 showing a state in which the braking of the wheels by the braking mechanism is released by operating the operating lever. FIG. 5 is a view corresponding to FIG. 5 showing a state in which the braking of the wheels by the braking mechanism is released by operating the operating lever.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is essentially merely an example.

FIG. 1 shows a towing carriage 1 according to an embodiment of the present invention. The towing trolley 1 is used in, for example, a production factory, and includes a trolley main body 2 on which luggage B1 can be placed.

The trolley main body 2 is provided on a rectangular plate-shaped base plate 21, a rectangular grid-shaped front grid frame 22 erected on the front edge of the base plate 21 in the traction direction, and a rear edge of the base plate 21 in the traction direction. A rear grid frame 23 having an erected rectangular grid shape and a rectangular plate-shaped upper shelf plate 24 that bridges the middle portion of the front grid frame 22 and the middle portion of the rear grid frame 23 are provided. The luggage B1 can be placed on the base plate 21 and the upper shelf plate 24, respectively.

A pair of first casters 3a having wheels 30a are rotatably attached around a vertical axis extending in the vertical direction at each corner on the lower surface of the base plate 21 on the front side in the towing direction.

On the other hand, a pair of second casters 3b are attached to the lower surface of the base plate 21 near each corner on the rear side in the towing direction, and the wheels 30b of each of the second casters 3b can roll in the towing direction. ..

A brake unit 10 that performs a braking operation of the carriage body 2 is attached to the carriage body 2.

As shown in FIGS. 2 and 3, the brake unit 10 includes a pair of braking mechanisms 4 attached to each of the second casters 3b.

The braking mechanism 4 includes an inwardly expanding drum brake 41, and the drum brake 41 has a disc-shaped brake main body 41a and an extension portion extending diagonally upward from the brake main body 41a on the front side in the traction direction. It has 41b and.

A mounting bracket 42 is fixed to the extending end of the extending portion 41b, and one end of a coil spring 43 is connected to the mounting bracket 42.

At a position near the extension portion 41b of the brake body portion 41a, a swing lever 44 having a posture extending in a direction orthogonal to the extension direction of the extension portion 41b swings around a swing shaft 44a extending in the vehicle width direction. The drum brake 41 is movably attached, and the upper end side of the swing lever 44 swings rearward in the traction direction to brake the wheels 30b.

The other end of the coil spring 43 is connected to the lower end of the swing lever 44, and the coil spring 43 pulls the lower end side of the swing lever 44 so that the upper end side of the swing lever 44 swings rearward in the pulling direction. It is always urged to the front side of the direction.

One end of the brake side wire 45 is connected to the upper end of the swing lever 44, and when the brake side wire 45 is moved to the front side (one side) in the traction direction, the coil spring 43 is attached as shown in FIG. The upper end side of the swing lever 44 swings forward in the traction direction against the force, and the braking state of the wheel 30b is released.

On the other hand, when the upper end side of the swing lever 44 swings to the rear side in the traction direction due to the urging force of the coil spring 43, the brake side wire 45 moves to the rear side (the other side) in the traction direction and the braking mechanism 4 brakes the wheel 30b. It is designed to be maintained in a state.

That is, the braking mechanism 4 of the present invention plays the role of a safety device that keeps the wheels 30b stationary in a normal state.

As shown in FIGS. 4 and 5, a slide unit 5 is fixed to the lower surface of the base plate 21 in the middle of the traction direction, and the slide unit 5 includes a mounting frame 51 having a substantially U shape in a plan view. ..

The mounting frame 51 extends from the rectangular plate-shaped first plate 51a extending in the traction direction and the front side edge portion and the rear side edge portion in the traction direction of the first plate 51a in the horizontal direction orthogonal to the first plate 51a, respectively. A second plate 51b and a third plate 51c are provided, and the second plate 51b has an extending wall portion 51d protruding from the extending end of the third plate 51c.

Three guide holes 51e penetrating in the pulling direction are formed in the extending wall portion 51d at equal intervals in the vertical direction, and three first guide cylinders are formed on the surface of the extending wall portion 51d on the front side in the pulling direction. 51f is attached so as to correspond to each of the guide holes 51e.

On the other hand, a pair of notched grooves 51g are arranged side by side in the vertical direction on the extending end side of the third plate 51c, and a pair of second guide cylinders 51h are provided on the surface of the third plate 51c on the rear side in the traction direction. It is attached so as to correspond to each of the notch grooves 51 g.

The other end side of the brake side wire 45 attached to each of the second casters 3b is slidably inserted into the second guide cylinder 51h and the notch groove 51g, and the other end of each brake side wire 45 is inserted into the other end. A short columnar engaging portion 45a wider than the main body portion of each brake side wire 45 is provided.

A slide rail 52 extending in the towing direction is fixed to the surface of the first plate 51a, and a slide body 53 is slidably attached to the slide rail 52 in the towing direction.

The slide body 53 has a slide frame 54 having a U-shaped cross section that is slidably fitted to the slide rail 52, and front side walls that project from the front side edge portion and the rear side edge portion in the pulling direction of the slide frame 54, respectively. A 55 and a rear side wall 56 are provided, and the front side wall 55 and the rear side wall 56 face each other in the slide direction of the slide frame 54.

The front side wall 55 has a protruding wall portion 55a protruding from the rear side wall 56, and the protruding wall portion 55a has three through holes 55b penetrating in the slide direction of the slide body 53, respectively, of the guide holes 51e. It is formed at each position corresponding to.

A rectangular plate-shaped bridge plate 57 is provided between the front side wall 55 and the rear side wall 56 to bridge the middle portion of the front side wall 55 and the protruding end of the rear side wall 56. , Facing the slide frame 54.

The rear side wall 56 and the bridge plate 57 are formed with slits 58 through which a portion of the brake side wire 45 other than the engaging portion 45a can be inserted so as to straddle the rear side wall 56 and the bridge plate 57.

A pair of slits 58 are formed at positions corresponding to the notch grooves 51g, and a wide portion 58a through which the engaging portion 45a of each brake side wire 45 can pass is formed at the end of each slit 58 on the bridge plate 57 side. Is formed.

Then, the engaging portions 45a of the brake-side wires 45 are made to correspond to the wide portions 58a, the brake-side wires 45 are passed through the slits 58, and the engaging portions 45a are engaged with the rear side wall 56, respectively. As a result, each brake side wire 45 is attached to the slide body 53.

One end side of the operation side wire 59 is inserted into the guide holes 51e, the first guide cylinder 51f, and the through hole 55b corresponding to each other.

At one end of each operation side wire 59, a short columnar hook portion 59a wider than the main body portion of each operation side wire 59 is provided. The hook portion 59a has a size that prevents it from passing through the through hole 55b, and when the operation side wire 59 is moved to one side, the hook portion 59a is hooked on the peripheral edge of the through hole 55b.

On the other hand, when the operation side wire 59 is moved to the other side, the portion of the operation side wire 59 other than the hook portion 59a slides in the through hole 55b so that the hook portion 59a is separated from the protruding wall portion 55a. ..

That is, each operation side wire 59 is arranged so that each hook portion 59a faces the brake side wire 45 side on one side of each operation side wire 59, and the portion of each operation side wire 59 excluding the hook portion 59a is provided. Each of the through holes 55b is inserted into the through hole 55b, and each of the brake side wires 45 and each operation side wire 59 extends in a direction away from the slide body 53.

As shown in FIG. 10, a connecting mechanism 6 that can be connected to the towing vehicle T (traction means) is provided at the lower portion of the bogie body 2 on the front side in the towing direction, and an operation side wire connected to the central portion of the slide body 53. The operating means 8 is composed of the 59 and the connecting mechanism 6.

The connecting mechanism 6 includes a guide frame 61 for guiding the operation side wire 59, a connecting frame 62 (operating portion) having a substantially isosceles triangle shape, and a support frame 63 for supporting the connecting frame 62.

The guide frame 61 includes a rectangular plate 61a attached so as to extend downward from the front side portion in the traction direction of the base plate 21, and an L-shaped bracket 61b having an L-shaped cross section is provided on the front side edge portion in the traction direction of the rectangular plate 61a. Is fixed.

A third guide cylinder 61c extending in an L shape in a side view is provided between the rectangular plate 61a and the L-shaped bracket 61b so as to extend from the extending end of the rectangular plate 61a to the lower surface of the L-shaped bracket 61b. The other end side of the operation side wire 59 connected to the central portion of the slide body 53 is inserted into the third guide cylinder 61c.

At one end of the connecting frame 62, a connecting portion 62a extending in a curved shape capable of connecting the tow hook T1 of the towing vehicle T is provided, while at the other end of the connecting frame 62, a round bar-shaped shaft portion extending in the vehicle width direction is provided. 62b is provided, and as shown in FIG. 7, the shaft portion 62b is provided in parallel on the outer peripheral surface on one end side in a direction orthogonal to the longitudinal direction of the connecting frame 62 and in a direction orthogonal to the shaft portion 62b. A pair of flat portions 62c are formed.

As shown in FIG. 6, a rotating member 64 that can rotate around the axis of the shaft portion 62b is attached to one end of the shaft portion 62b, and the rotating member 64 is inserted into the third guide cylinder 61c. The other end of the operation side wire 59 is fixed.

The support frame 63 is provided on the front side portion of the base plate 21 in the traction direction, and includes a first support plate 65 and a second support plate 66 (support portion) facing each other in the vehicle width direction.

The first support plate 65 is formed with a first support hole 67 into which the other end side of the shaft portion 62b of the connecting frame 62 is loosely fitted, and the connecting frame 62 can rotate around the other end portion of the shaft portion 62b as a fulcrum. It has become.

On the other hand, the second support plate 66 is formed with a second support hole 68 that supports one end side of the shaft portion 62b in the connecting frame.

As shown in FIG. 7, the second support hole 68 has a substantially keyhole shape, and has a rotatable portion 68a having a substantially circular cross section formed in the upper half portion of the second support hole 68 and a second support hole 68. It is provided with a slit-shaped fitting restricting portion 68b formed in the lower half portion of the support hole 68 and extending vertically.

The diameter of the rotatable portion 68a is set to be larger than the diameter of the shaft portion 62b, and when one end side of the shaft portion 62b is located at the rotatable portion 68a, as shown in FIGS. 8 to 11, The connecting frame 62 is rotatable around the shaft portion 62b.

On the other hand, the dimension of the fitting restricting portion 68b in the pulling direction is smaller than the diameter of the shaft portion 62b and corresponds to the dimension between the two flat portions 62c, and is one end of the shaft portion 62b. When the side is located on the rotatable portion 68a, the connecting frame 62 is in a vertically extending posture, and the connecting frame 62 is moved downward with the other end of the shaft portion 62b as a fulcrum. As shown, one end of the shaft portion 62b is fitted to the fitting restricting portion 68b.

That is, when the connecting frame 62 is in a posture extending in the vertical direction, the connecting frame 62 can slide in the vertical direction with respect to the trolley main body 2 with the other end portion of the shaft portion 62b as a fulcrum, and the shaft portion 62b is attached to the fitting restricting portion 68b. When the connecting frame 62 is moved upward so that one end side of the slide body 53 is disengaged from the fitted state, the operation side wire 59 connected to the central portion of the slide body 53 is separated from the slide body 53 as shown in FIGS. 12 and 13. The hook portion 59a moves to (one side) and is caught in the through hole 55b, and the slide body 53 slides forward in the traction direction accordingly. At this time, the remaining two operation-side wires 59 slide in each through hole 55b so that the hook portion 59a of each operation-side wire 59 is separated from the protruding wall portion 55a.

When the slide body 53 slides forward in the traction direction, both brake side wires 45 move to the front side (one side) in the traction direction, and the upper end side of each swing lever 44 moves to the front side in the traction direction against the urging force of each coil spring 43. It swings and the braking state of each wheel 30b is released.

On the other hand, when the connecting frame 62 in a posture extending in the vertical direction is moved downward so that one end side of the shaft portion 62b is fitted to the fitting restricting portion 68b, the upper end side of each swing lever 44 is moved by the urging force of each coil spring 43. Each wheel 30b swings to the rear side in the traction direction, and both brake side wires 45 move to the rear side (the other side) in the traction direction.

When both brake side wires 45 move to the rear side in the towing direction, the slide body 53 slides to the rear side in the towing direction, and the operating side wire 59 moves together with the slide body 53 accordingly.

That is, the connecting frame 62 can operate the braking of each wheel 30b by the sliding operation in the vertical direction.

Further, when the connecting frame 62 is rotated forward in the traction direction so that the connecting frame 62 extends in the traction direction with one end side of the shaft portion 62b positioned at the rotatable portion 68a, as shown in FIGS. 10 and 11. In addition, since one end side of the shaft portion 62b cannot be fitted to the fitting restricting portion 68b, the downward movement of the connecting frame 62 is restricted.

As shown in FIG. 14, an operation handle 7 (operation unit) for an operator to operate the trolley 1 is provided in the middle portion on the front side of the trolley body 2 in the towing direction, and is connected to the upper part and the lower part of the slide body 53. The operating means 9 is composed of the two operating side wires 59 and the operating handle 7.

The operation handle 7 includes a gripping frame 71 having a substantially U-shape in a plan view that can be gripped by an operator, and each end of the gripping frame 71 is fixed to the front grid frame 22.

A pair of rod-shaped operating levers 72 are provided on the horizontally extending portion of the gripping frame 71 so as to be symmetrical in the vehicle width direction when viewed from the front side of the traction carriage 1, and one end of each operating lever 72 is provided. The other ends of the operation side wires 59 connected to the upper part and the lower part of the slide body 53 are connected to each other.

Further, one end side of each operating lever 72 is oscillatingly supported by the gripping frame 71, and when an operator swings one of the operating levers 72 so as to approach the gripping frame 71, FIG. And as shown in FIG. 16, the operation side wire 59 connected to the upper part of the slide body 53 moves in the direction away from the slide body 53 (one side), the hook portion 59a is caught in the through hole 55b, and the slide body 53 is in the pulling direction. It is designed to slide forward. At this time, the remaining two operation-side wires 59 slide in each through hole 55b so that the hook portion 59a of each operation-side wire 59 is separated from the protruding wall portion 55a.

When the slide body 53 slides forward in the traction direction, both brake side wires 45 move forward in the traction direction, and the upper end side of each swing lever 44 swings forward in the traction direction against the urging force of each coil spring 43. The braking state of each wheel 30b is released.

On the other hand, when the operator releases one of the operating levers 72, the urging force of each coil spring 43 causes the upper end side of each swing lever 44 to swing rearward in the traction direction, and each wheel 30b is in a braking state. Both brake side wires 45 move to the rear side (the other side) in the towing direction.

When both brake side wires 45 move to the rear side in the traction direction, the slide body 53 slides to the rear side in the traction direction, and the operation side wire 59 moves accordingly to separate one operation lever 72 from the gripping frame 71. It is designed to swing.

The operation of the brake unit 10 when the other operating lever 72 is swung is such that one operating lever 72 is swung except that the slide body 53 is slid by the operation side wire 59 connected to the lower part of the slide body 53. Since the operation is the same as that of the brake unit 10 at the time, detailed description thereof will be omitted.

From the above, according to the embodiment of the present invention, the towing carriage 1 is switched between the movement restricted state and the movement allowable state by the sliding operation of the connecting frame 62 in the vertical direction. Therefore, the operator can operate the braking mechanism 4 in the towing carriage 1 by moving the connecting frame 62 in the vertical direction.

Further, since the sliding direction of the connecting frame 62 is the vertical direction, when the towing carriage 1 performs cargo handling work in the movement restricted state, the connecting frame 62 with respect to the carriage main body 2 even if the towing vehicle T unexpectedly tries to move forward. Do not slide. Therefore, since the tow truck 1 maintains the movement restricted state, the operator can safely perform the cargo handling work.

Further, when the connecting frame 62 is rotated to the front side of the towing carriage 1 so as to extend in the towing direction, the towing carriage 1 can be towed by the towing vehicle T. On the other hand, when the connecting frame 62 is rotated to the rear side of the towing carriage 1 to extend in the vertical direction, the entire towing carriage 1 becomes compact, so that the operator can effectively utilize the space around the towing carriage 1. Can carry out cargo handling work.

Further, when the connecting frame 62 is in a posture extending in the towing direction, the connecting frame 62 cannot slide in the vertical direction, so that it is possible to prevent the towing carriage 1 from being suddenly restricted from moving. On the other hand, when the connecting frame 62 extends in the vertical direction, the connecting frame 62 can be slid in the vertical direction so that the shaft portion 62b fits in the fitting restricting portion 68b, so that the towing carriage 1 is made compact. The movement can be restricted in the state.

In the embodiment of the present invention, the braking state of the wheels 30b of the second caster 3b is released by the moving operation of the brake side wire 45 to the front side in the towing direction, while the moving operation of the brake side wire 45 to the rear side in the towing direction. The wheel 30b of the second caster 3b is braked by the above method. The brake of the wheel 30b of the second caster 3b may be released by the movement operation to the rear side.

Further, in the embodiment of the present invention, when the connecting frame 62 is slid upward, the braking of the wheels 30b is released, while when the connecting frame 62 is slid downward, the wheels 30b are braked. However, when the connecting frame 62 is slid downward, the braking of the wheels 30b is released, while when the connecting frame 62 is slid upward, the wheels 30b may be braked.

Further, in the embodiment of the present invention, the brake side wire 45 is moved by the vertical sliding operation of the connecting frame 62, but the present invention is not limited to this, and for example, the shaft portion is moved by the rotating operation of the connecting frame 62. The operation side wire 59 may be wound up or unwound at 62b to move the brake side wire 45.

Further, in the embodiment of the present invention, three operation-side wires 59 are connected to the slide body 53, but the number of operation-side wires 59 may be two or four or more.

Further, in the embodiment of the present invention, the structure of the present invention is applied to the traction carriage 1 composed of four wheels (wheels 30a and 30b), but the structure of the present invention is applied to the traction carriage composed of six wheels. You may.

Further, in the embodiment of the present invention, the braking mechanism 4 is attached to the second caster 3b that does not rotate around the vertical axis, but the first caster 3a that is rotatable around the vertical axis is made non-rotatable. The braking mechanism 4 may be attached to the first caster 3a.

Further, in the embodiment of the present invention, one operation handle 7 is provided, but a plurality of operation handles 7 may be provided.

Further, in the embodiment of the present invention, the gripping frame 71 of the operation handle 7 has a substantially U-shape in a plan view, but other shapes may be used.

Further, in the embodiment of the present invention, the operating lever 72 has a rod shape, but other shapes may be used.

Further, in the embodiment of the present invention, the slide body 53 is slid by swinging the operation lever 72, but the present invention is not limited to this, and the slide body 53 may be slid by other operating means. Good.

The present invention is suitable for a towing carriage that can be towed by a towing vehicle.

1 Towing trolley 2 trolley body 3b 2nd caster 4 Braking mechanism 45 Brake side wire (wire member)
62 Connecting frame 62a Connecting part 62b Shaft part 66 Second support plate (support part)
68b Fitting regulation part B1 Luggage T towing vehicle (towing means)

Claims (3)

A tow truck that can be towed by towing means
The dolly body on which luggage is placed and
A plurality of casters attached to the lower surface of the dolly body,
Attached to at least two of the casters, the brake-side wire member is moved to one side to release the braking state of the wheels of the caster, while the brake-side wire member is moved to the other side. A braking mechanism configured to brake the wheels of the casters,
It is provided on the front side in the towing direction of the bogie body and is provided with a connecting frame that can be connected to the towing means.
The connecting frame is connected to the brake side wire member via an operation side wire member and a slide unit , and is provided so as to be capable of at least one of a vertical sliding operation and a rotating operation with respect to the bogie body. And, when sliding to either one of the lower side or the lower side, or when rotating to one side, the brake side wire member is moved to one side, while being slid to either the upper side or the lower side, or the other side. The brake side wire member is configured to move to the other side when it is rotated to the other side.
The slide unit has a slide body in which the operation-side wire member and the brake-side wire member of each braking mechanism attached to at least two casters are engaged with each other.
When the connecting frame is slid either upward or downward or rotated to one side, the operating side wire member moves to one side and the sliding body moves to one side. While each of the brake-side wire members moves to one side, when the connecting frame is slid to either the upper or lower side or rotated to the other side, each of the brake-side wire members moves to the other side. A tow truck characterized in that the operation side wire member moves to the other side by moving to the side and the slide body moves to the other side. In the towing carriage according to claim 1,
One end of the connecting frame is provided with a shaft portion extending in the vehicle width direction, while the other end is provided with a connecting portion that can be connected to the towing means.
The bogie body is provided with a support portion that supports the shaft portion so that the connecting frame can slide in the vertical direction and can rotate around the shaft portion.
When the connecting frame is in a posture extending in the vertical direction, the shaft portion moves and fits into the support portion in either the upper direction or the lower direction, while the connecting frame is not in a posture extending in the vertical direction. A fitting regulation part that regulates the movement of either the upper part or the lower part of the shaft part is provided.
When the shaft portion moves away from the fitting restricting portion, each brake side wire member moves to one side, while when the shaft portion moves in the fitting direction to the fitting restricting portion, the above A traction carriage characterized in that each brake-side wire member is configured to move to the other side. In the towing carriage according to claim 1 or 2.
It also has an operation handle provided on the dolly body.
The operation handle has a gripping frame supported by the bogie body and an operating lever that can swing with respect to the gripping frame.
The operation lever is connected to the slide body via a wire member different from the operation side wire member, and the slide body is operated separately from the operation of the connecting frame to operate each brake side. A tow truck characterized in that the wire members are configured to move one side or the other side, respectively.

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