JP6062727B2 - Heavy goods transport device - Google Patents

Description

  The present invention relates to a heavy-duty carrying device used for carrying in / out and installing heavy loads in various factories and construction sites.

  Usually, a heavy-duty carriage (sometimes referred to as a heavy-duty carrying roller or a heavy-duty carrying caster) is used for carrying various heavy objects. Although conventional heavy-duty carriages vary in size, they have a basic structure that includes a pedestal and a traveling wheel attached to the lower surface of the pedestal, and various weights on the pedestal. It is assumed that the object is moved together with the heavy-duty carriage with the object placed thereon. In the case of a large heavy object, a heavy material carriage is disposed at each of the four corners of the heavy object to disperse the weight and to carry the heavy object while stabilizing its posture.

In general, a roller-shaped wheel with a small diameter is used because the weight of a heavy object is considerably large and the load on the wheel is considerably large, and the posture is kept low in consideration of the safety of moving work. Many.
If the wheel has a small diameter, even when a heavy object is placed, it is said that the heavy object can be smoothly swiveled to a desired place with a small turning effect, There is also an advantage that switching between the left and right turning movements is easy.

  In general, heavy-duty carts do not have a driving mechanism for automatic driving, and do not have a handle, etc., and push heavy items directly by hand, or pulls to manually pull parts of heavy-duty carts. There are things that are provided. In addition, in order to conduct traction force especially in difficult to move scenes, the ratchet lever handle can be attached to the wheel axle, and the wheel axle of the running wheel is gradually rotated directly from the outside via the ratchet lever handle. Some have a rotation assisting mechanism.

  Furthermore, there is also an example of a structure in which an electric roller called an electric speed universal roller is attached in order to automatically drive the traveling wheels. The electric roller is provided with a driving motor, and the driving force can be arbitrarily decelerated to control the traveling wheel to be driven to rotate.

FIG. 7 is a view showing a conventional popular heavy-duty carriage 1. This is an example in which a traveling wheel is attached in a roller shape.
In the configuration example shown in FIG. 7, the heavy-duty carriage 1 has a pedestal and a total of four roller-shaped traveling wheels 2 arranged in two rows below the pedestal. In this configuration example, a motor (not shown) is incorporated, and transporting work can be performed by driving the motor. In this configuration example, a mechanism for attaching a ratchet lever handle is not shown, but a configuration in which a ratchet lever handle mechanism is provided is also possible.

  FIG. 7B shows a state in which the four heavy goods transport carts 1 are arranged at the four corners of the heavy goods P to carry the heavy goods P. Compared to the size of the heavy object P, the pedestal surface of the heavy object transport carriage 1 is sufficiently low, and the transport posture is stable. Further, the diameter of the roller-shaped traveling wheel 2 is sufficiently smaller than the size of the heavy object P, and the heavy object P can be moved while gradually rotating the roller-shaped traveling wheel 2. The diameter of the roller-shaped traveling wheel 2 is fixed with respect to the rotating shaft, and the traveling direction is fixed in the front-rear direction. However, when bending the traveling direction, the heavy load P is obliquely pressed or the traction lever is obliquely inclined. It can be bent by sliding the floor surface and the traveling wheel 2 by changing the traveling direction.

  Next, FIG. 8 is a figure which shows the heavy goods trolley | bogie which made the device which connected the conventional roller in the shape of a caterpillar. Many of the above-mentioned Patent Document 1 have only about four rollers and have a small ground contact area. Therefore, in the thing of patent document 2, since many rollers are connected and it circulates, there exists an advantage that the number of rollers to earth | ground increases and a grounding area increases.

Japanese Patent No. 3099123 JP 7-215453 A

According to the above-described conventional heavy-duty carrying device, the weight of the heavy load can be dispersed and carried while the posture of the heavy load is stabilized.
However, the above-described conventional heavy article transport device disclosed in Patent Document 1 has the following problems.

  The first is a problem of a floor surface installation area of the traveling wheel and a scratch on the floor surface due to a load. In general, the conventional heavy-duty carrying device 1 is often provided with about four roller-shaped traveling wheels 3, but due to the nature of the wheels, the ground contact area to the floor is extremely small, and the small installation area is small. The load of the weight of the heavy article 5 is concentrated. For this reason, it is possible to damage the wheel and axle, and even if the wheel structurally withstands, a large load concentrates on the ground contact part of the floor surface, so the floor surface side is damaged and the floor surface is imprinted. Or the floor may be partially depressed.

  The second is a problem of running obstacles due to floor distortion and unevenness. Generally, the conventional heavy-duty carrying device 1 is provided with a roller-shaped traveling wheel 3, and its diameter is reduced in order to withstand a heavy load. For this reason, if the floor surface is distorted or uneven, the balance between the left and right wheels is easily lost, and it takes a lot of labor to get out of the wheel by falling into the recess, which may interfere with driving. It was a thing.

  Thirdly, there is a problem of travel failure due to a small piece between the travel wheel 3 and the floor. In general, the conventional heavy load carrying device 1 is provided with a roller-shaped traveling wheel 3, and the diameter thereof is small in order to withstand the load of heavy load. Also. The basic principle is that an elastic body such as a tire is not wound and a steel material having a high hardness is directly exposed. Therefore, if there is a small foreign object having a large hardness on the moving floor surface, it may be sandwiched between the traveling wheel 3 and the floor surface, and the rotation of the traveling wheel 3 may be significantly inhibited. Generally, the work place where the heavy material transport device 1 is used for transporting the heavy material 5 may be in a situation where the cleaning is not necessarily completely completed, such as a factory building or a construction site. If there is a large foreign matter such as a small piece of iron or pebbles, the roller-shaped traveling wheel 3 may be clogged, which may hinder the work of transporting the heavy object 5.

Next, the above-described conventional heavy material transport device disclosed in Patent Document 2 has the following problems.
Since the number of rollers in contact with the ground is larger than that of the heavy article transport device disclosed in Patent Document 1, the installation area is relatively large.
However, the heavy article transport device disclosed in Patent Document 2 has the following problems.

  First, since the running wheel is a roller, the problem is that the floor surface is damaged by the load. Even if the number of rollers that are in contact with the ground is larger than that of the heavy material transport device of Patent Document 1, each one is a cylindrical roller. When supporting, there is still a problem of scratches on the floor due to the load.

Secondly, there are problems of running obstacles due to distortion and unevenness of the floor, and running obstacles due to small pieces between the running wheels and the floor.
Since the heavy-duty conveying device shown in Patent Document 2 is also a running means, a running failure occurs if there is distortion or unevenness on the floor, and if there is a small piece between the running wheel and the floor. Running trouble occurs.

  The third is a problem of structural strength. The inner and outer links are alternately arranged on the chain, and complicated structures such as rollers and pins of the inner link are built in. Therefore, some structure is attached between the facing surfaces of the paired chains. In this case, there is no space, and there is a drawback that it is difficult to maintain the structural strength as a structure that supports an extremely heavy object in order to use the pin of the chain as a support shaft.

  In view of the above-described problems, the present invention is configured without using traveling wheels as traveling means, so that it is possible to further distribute the load of heavy objects, maintain floor surfaces, and travel safely. An object is to provide a transport device.

To achieve the above object, a heavy-duty carrying device according to the present invention includes a pedestal on which a heavy load is placed, a sprocket shaft that rotatably contacts a bearing that supports the pedestal, and a sprocket shaft that is attached to the sprocket shaft. A pair of left and right sprockets, a pair of left and right chains connected to the sprocket and rotating endlessly, and provided on the outer peripheral side of the chain so as to bridge the outer peripheral side of the pair of left and right chains A bridge plate material mounting structure provided with a bridge plate material, wherein a member corresponding to a joint plate that vertically contacts the bridge plate material among members constituting the chain is folded back to be parallel to the bridge plate material. , configure via the bridge plate mounting structure, ligated and said bridge plate and said coupling plate so as to ground with the bridge plate on the floor Tighten was a heavy goods unit.

With the above configuration, the heavy article transport device of the present invention is a plurality of plate materials compared to a wheel with a small ground contact area, so that the ground contact area can be secured extremely large, and the load on the weight of the heavy article is sufficiently dispersed. Can be supported.
In addition, because it is a bridge plate material, it does not clog even if there is a foreign object such as a small piece on the floor surface of the transportation route that would have been a problem with wheels with a small diameter, and the bridge plate material is rotated by the large diameter of the sprocket. Because it can be pressed, you can get over easily. Further, even if the floor surface is slightly distorted or uneven, it can travel while being absorbed by the large ground contact area of the bridge plate material.

  Moreover, there is a great merit in the configuration in which the bridge plate material is provided on the outer peripheral side of the chain. In the chain, inner links and outer links are alternately arranged, and complicated structures such as rollers and pins of the inner links are incorporated. Therefore, as shown in Patent Document 2, the facing surfaces of the paired chains If any structure is attached between them, there is no space, and above all, structural strength is difficult to maintain. However, in the present invention, since the bridge plate material is provided on the outer peripheral edge side of the chain, the width of the inner link and the outer link of the chain can be secured as the mounting width of the bridge plate material, so the width of the bridge plate material is increased. In addition, the mechanical strength of the steel plate surface of the chain is relatively strong in the vertical direction. If the bridge plate material is provided on the outer periphery of the chain, the vertical direction of the steel plate surface of the chain Since the force is transmitted to the mechanical structure, the mechanical structure strength can be increased.

  In addition, the bridge board | plate material of this invention is not a mere caterpillar. The caterpillar is a structure in which the pillars are pivotably connected to move along an endless orbit while being connected to the so-called strips, and the caterpillar rotates as the wheels rotate while gripping the inner surface of the caterpillar. It is. The caterpillar is surrounded by a frame or the like so as not to be detached from the wheel, but the caterpillar and the wheel are not mechanically directly connected. The bridge plate material of the present invention is different in structure from the caterpillar as follows.

  It is preferable that the drive is provided with a drive system using a sprocket and a chain instead of a wheel, and the bridge plate is attached at an outer peripheral side of a member corresponding to a joint plate among members constituting the chain.

  Note that the bridge plate members are not connected to each other, and are provided on the outer peripheral side of the chain so that each piece independently bridges the outer peripheral side of the pair of left and right chains. Preferably, the chain is provided so as to bridge the outer peripheral edge side of the chain with an appropriate gap.

  As described above, since it is provided on the outer peripheral side of the member corresponding to the joint plate among the members constituting the chain, the attachment position is originally spaced, and while rotating on the endless circular orbit, on the linear locus Compared to the distance on the outer peripheral edge side of the joint plate when positioned, the distance on the outer peripheral edge side of the joint plate when positioned on the circumferential trajectory along the sprocket is slightly widened. It is better not to be connected.

  Next, in the heavy goods transport device of the present invention, in order to change the posture of the heavy goods, the structure is provided with the rotary seat 114 on the upper surface of the pedestal, and the heavy goods can be placed on the rotary seat 114 in a rotatable state. Is preferred. This is because there is a case where there is a projection from the wall surface or the side of the machine device in the route for transporting the heavy object, and it may be necessary to change the passing posture of the heavy object. In addition, there is a case where it is necessary to change the direction of the heavy load because it is necessary to have a curve or a corner in the transportation route. If the heavy object can be placed on the rotary seat 114 in a rotatable state, the passing posture of the heavy object can be changed.

  In addition, although the tow | pulling by a hand is also possible as a motive power of the heavy article conveyance apparatus of this invention, it is also possible to use an electrical energy. That is, it is possible to adopt a configuration in which a motor-driven rotation mechanism is provided for the sprocket, and the forward or backward control can be performed by rotating the sprocket using electric energy.

  In addition, when manually pulling as the power of the heavy material transport device of the present invention, a ratchet rotation mechanism is provided for the shaft of the sprocket, and a ratchet lever handle is attached to the sprocket shaft manually from the outside via the ratchet rotation mechanism. A configuration is also possible in which the sprocket is rotated to allow forward or backward control.

  According to the heavy material transport device of the present invention, the ground contact area can be ensured to be extremely large as compared with a wheel having a small ground contact area, and thus the load on the weight of the heavy object can be sufficiently dispersed. Can be supported. In addition, because it is a bridge plate material, large sprockets can be used without clogging even if there are foreign objects such as distortion and irregularities on the floor surface of the transportation route and small pieces on the floor surface, which are problematic for wheels with small diameters. Since the bridge plate material can be pressed by rotating the diameter, it can be easily overcome.

  Hereinafter, an embodiment of the heavy-duty carrying device of the present invention will be described with reference to the drawings. However, it goes without saying that the scope of the present invention is not limited to the specific application, shape, number, etc. shown in the following examples.

FIG. 1 is a configuration diagram schematically showing the configuration of the heavy-duty carrying device 100 shown in the first embodiment.
FIG. 2 is a configuration diagram showing a state in which the upper heavy load loading surface is removed so that the internal structure of the heavy load transport device 100 can be easily understood.
FIG. 3 is a configuration diagram in which the side wall surface is removed so that the internal structure of the heavy-duty carrying device 100 can be understood.
As shown in FIGS. 1, 2, and 3, the heavy material transport device 100 according to the first embodiment of the present invention includes a pedestal 110, a sprocket shaft 120, a sprocket 130, a chain 140, and a bridge plate 150. It has a configuration with.

The pedestal 110 is a member on which a heavy object is placed, and the upper surface is a heavy object loading surface 111. It is also possible to provide a rotary seat 114 on the heavy load loading surface 111 and to place the heavy load on the rotary seat 114 so as to be rotatable. This configuration will be described later.
A chassis 112 is provided under the heavy object loading surface 111 of the pedestal 110. The chassis 112 has a rectangular shape so as to surround main members of the heavy-duty carrying device 100 described later. However, as will be described later, the ground contact surface with the floor surface is the bridge plate material 150, and the lower surface side of the bridge plate material 150 is positioned below the lower surface of the chassis 112 so that the chassis 112 does not hit the floor surface. The chassis 112 is devised so as not to rub against the floor surface.

A bearing portion 113 is provided on the side surface of the chassis 112.
The bearing portion 113 is a member provided on a part of the side surface of the pedestal 110 and is a bearing that abuts against the sprocket shaft 120. Since this bearing portion 113 is subjected to a heavy load, it is preferable that the bearing portion 113 has a large inner diameter and a certain thickness so that a contact surface with the sprocket shaft 120 is increased. The bearing 113 is preferably polished smoothly so that the coefficient of friction with the sprocket shaft is reduced. The material of the bearing 113 is preferably a stainless steel material having a high hardness.

The sprocket shaft 120 is a shaft that rotatably contacts the bearing portion 113 that supports the pedestal 110 and serves as a rotation shaft. In this configuration example, the sprocket shaft 120 is attached so as to penetrate the side surface of the heavy material transport device 100. Since the sprocket shaft 120 is subjected to a heavy load, it is preferable that the sprocket shaft 120 has a large diameter so that a contact surface with the bearing portion 113 is large. As an example, the diameter is 45 mm.
The material of the sprocket shaft 120 is preferably a stainless steel material having a high hardness.

  The sprocket 130 is attached to the sprocket shaft 120 and is paired on the left and right. It is a member that transmits a driving force that meshes with the chain 140 and rotates the chain in an endless orbit. Since the heavy load is applied to the sprocket 130 via the sprocket shaft 120, the thickness of the sprocket 130 is sufficiently thick, and the material is preferably a stainless steel material having high hardness.

  In the present invention, since the sprocket 130 and the chain 140 are also loaded with heavy objects, the diameter of the sprocket 130 and the chain 140 is increased because the inner link 141 of the chain 140, which will be described later, is used with a strong and strong roller. The shape of the tooth profile 130 matches the roller of the inner link 141 of the chain 140.

The chain 140 is connected to the inner link 141 and the outer link 142 in the same manner as a normal chain. The inner link 141 arranged in an endless loop is connected by the outer link 142 to rotate in an endless loop. To do.
The chains 140 are provided in left and right pairs, and in this configuration example, there are a left system and a right system.

  The inner link 141 has a plurality of members, but the roller is a portion that meshes with the sprocket 130, and is combined with the sprocket 130 to support the weight load of the heavy load. The diameter is large and sturdy.

  The outer link 142 also has a plurality of members, but has a pin and a joint plate. The pin passes through the inside of the roller of the inner link 141 and connects the inner link 141 and the outer link 142. The joint plate is a member that connects the front and rear inner links 141 so as to straddle each other.

Here, in the present invention, the joint plate is provided with a bridge plate material mounting structure 143 for mounting the bridge plate material 150.
The bridge plate member mounting structure 143 is located on the outer peripheral edge side of the joint plate, and is folded in the horizontal direction so as to be parallel to the bridge plate member 150 in this configuration example. The bridge plate member mounting structure 143 is provided for each joint plate of the pair of left and right chains 140. By attaching the bridge plate member 150, the bridge plate member mounting structure 143 is provided on the outer periphery side of the chain so as to bridge the outer periphery side of the pair of left and right chains. On the other hand, a bridge plate 150 can be provided.

  The bridge plate 150 is a plate provided on the outer peripheral side of the chain so as to bridge the outer peripheral side of the pair of left and right chains 140. The heavy material transport device 100 of the present invention is configured so as to contact the floor surface with the bridge plate material 150. In addition, since the bridge plate material 150 directly contacts the floor surface and supports the load of heavy objects, a stainless steel material having a large structural strength and a large thickness is preferable.

The bridge plate material 150 of the present invention is not a mere caterpillar as is usually seen.
Conventional caterpillars are driven by wheels, and due to their nature, they are divided into left and right caterpillars according to the left and right wheels, and each wheel presses the inner surface of each caterpillar and grips it. However, the caterpillar rotates by rotating while rotating. The caterpillar and the wheel are not directly connected mechanically. On the other hand, the bridge plate material 150 of the present invention is driven by a chain using sprockets 130 and chains 140 instead of wheels. Further, the bridge plate member 150 bridges the left system chain and the right system chain so that the entire area of the lower surface of the heavy material transport device 100 can be used as a ground plane.

  The caterpillar is directly connected to the front and rear pillars so as to freely rotate, and is connected in a so-called belt-like manner in a continuous and endless manner. On the other hand, in the present invention, the bridge plate members 150 are not directly connected to each other. Each bridge plate 150 is provided on the outer peripheral edge of the chain 140 so as to bridge the outer peripheral edge of the pair of left and right chains 140 independently. The bridge plate members 150 are attached with an appropriate gap.

Next, a device for providing the bridge plate 150 will be described.
FIG. 4 simply shows the relationship among the sprocket 130, the chain 140, and the bridge plate material 150 so as to be easily understood.
A bridge plate material mounting structure 143 is located on the outer peripheral edge side of the joint plate, and a bridge plate material 150 is mounted on the bridge plate material mounting structure 143.

  As shown in FIG. 4, the bridge plate members 150 are not connected to each other and are provided on the outer peripheral side of the joint plate among the members constituting the chain 140, so that the attachment positions are originally attached at intervals.

While the chain 140 rotates on the endless circular orbit, the outer peripheral side of the joint plate when positioned on the circumferential track along the sprocket 130 as compared to the interval on the outer peripheral side of the joint plate when positioned on the linear track However, since the bridge plate members 150 are independent and not connected to each other, even the thick bridge plate member 150 rotates the endless circular track without any problem.
That is, the present invention is a chain drive as viewed from the drive system, and the bridge plate 150 is attached to the outer peripheral edge side of the chain so as to sufficiently support the load of heavy objects.

  Further, according to the present invention, in view of the size of the ground contact surface, the bridge plate material 150 is provided so as to bridge the pair of left and right chains 140, and not only the periphery of the chain 140 but also the entire lower surface of the heavy-duty conveying device 100. Can be used as a ground contact surface, and an improvement in mechanical structure strength is achieved.

Next, the driving force of the heavy material transport device 100 of the present invention will be described.
The heavy-duty carrying device 100 according to the present invention can be driven by a configuration in which the heavy load 200 is pushed out by human power, or in a configuration in which a motor is provided to provide a driving force by electric energy.
If the configuration is such that the heavy object 200 is pushed out by human power, the sprocket need not have a drive system structure such as a motor, and the structure becomes simple.
However, there are cases where it is difficult to carry and move by human power due to various conditions during the carrying work such as the condition of the carrying route and the presence of obstacles. At that time, a large amount of power must be transmitted manually to the sprocket. Therefore, it is possible to devise providing a ratchet rotation mechanism for the sprocket 130. A ratchet lever handle (not shown) is attached to the sprocket shaft 120, and the sprocket is rotated manually via the ratchet rotating mechanism from the outside to enable forward or backward control.

  In a configuration in which a motor is provided instead of human power and a driving force is provided by electric energy, a motor drive rotation mechanism (not shown) is provided for the sprocket 130, and the sprocket 130 is rotated using electric energy to move forward or backward. Can be controlled.

Next, the use of the heavy material transport device 100 of the present invention will be briefly described.
One or a plurality of heavy material transport devices 100 of the present invention can be used.
In the example of FIG. 5, one heavy load transport device 100 is arranged at each of the four corners with respect to the heavy load 200, and the load of the heavy load 200 is further dispersed and transported while maintaining balance. .

  The arrangement of the heavy-duty carrying device 100 of the present invention with respect to the heavy piece 200 is not limited, and various arrangements are possible. However, as described above, the ratchet depends on various conditions during the carrying operation such as the state of the carrying path and the presence of obstacles. It may be necessary to use a lever handle. Therefore, the heavy-duty carrying device 100 is arranged so that the ratchet lever handle of the heavy-duty carrying device 100 can be operated from the periphery of the heavy load 200 such as four corners, side edges, front edge, and rear edge on the lower surface of the heavy load 200. It is preferable to arrange them.

Next, a device for providing the rotary seat 114 on the upper surface of the base will be described.
In the route for transporting the heavy object 200, there may be a protrusion on the wall surface, or it may pass by the side of the mechanical device in a factory or the like, and the passing posture of the heavy object 200 may need to be changed. In addition, the transportation route itself needs to be curved or turn a corner, and it may be necessary to change the traveling direction of the heavy object 200. Therefore, a rotating seat 114 that is rotatable is provided on the heavy load loading surface 111 so that the heavy load can be easily rotated, and the passing posture of the heavy load 200 can be changed on the rotating seat 114. Is added.

FIG. 6 is a diagram simply showing the movement of the rotary seat 114 that can rotate on the heavy load loading surface 111. A circle drawn with a dotted line is a rotating seat 114, and in this configuration, a top plate 113 is further provided on the rotating seat 114. As shown in FIG. 6, the rotary seat 114 can freely rotate freely in the horizontal plane, and the posture can be adjusted by rotating a heavy object placed on the rotary seat 114 in the horizontal plane. It is preferable that the rotary seat 114 has a rotation mechanism such as a bearing so that it can easily rotate smoothly.
It is also possible to provide a top plate that serves as a heavy load loading surface on the rotary seat 114.

  While preferred embodiments of the invention have been illustrated and described, it will be appreciated that various changes can be made without departing from the scope of the invention. Therefore, the technical scope of the present invention is limited only by the description of the appended claims.

  The heavy-duty carrying device of the present invention can be applied as a heavy-duty carrying device used for loading / unloading and installing heavy loads at various factories and construction sites.

It is the block diagram which showed typically the structure of the heavy article conveyance apparatus 100 of this invention. It is the block diagram which showed a mode that the heavy article loading surface of the upper surface was removed so that the structure inside the heavy article conveyance apparatus 100 might be understood easily. It is the block diagram which removed the wall surface of the side so that the structure of the inside of the heavy article conveyance apparatus 100 could be understood. The relationship among the sprocket 130, the chain 140, and the bridge plate 150 is simply illustrated for easy understanding. It is a figure which shows a mode that the heavy-duty conveying apparatus 100 is arrange | positioned with respect to the heavy-weight object 200, respectively, respectively at four corners. It is the figure which showed simply the motion of the rotation seat 114 which can be rotated on the heavy article loading surface. It is a figure which shows the popular type heavy article trolley | bogie in a prior art. It is a figure which shows the heavy goods trolley | bogie which made the device which connected the conventional roller in the shape of a caterpillar.

DESCRIPTION OF SYMBOLS 100 Heavy goods conveyance apparatus 110 Base 111 Heavy goods loading surface 112 Chassis 113 Bearing part 120 Sprocket shaft 121 Grip part 130 Sprocket 140 Chain 141 Inner link 1411 Roller 142 Outer link 1421 Pin 1422 Joint plate 150 Bridge plate material 200 Heavy article

Claims (7)

A pedestal on which heavy objects are placed;
A sprocket shaft that rotatably contacts a bearing portion that supports the pedestal;
A pair of left and right sprockets attached to the sprocket shaft;
A pair of left and right chains connected to the sprocket and rotating in an endless circumferential manner;
A bridge plate material provided for the outer peripheral edge side of the chain so as to bridge the outer peripheral edge side of the pair of left and right chains,
Of the members constituting the chain, a member corresponding to a joint plate that abuts perpendicularly to the bridge plate material is provided with a bridge plate material mounting structure folded so as to be parallel to the bridge plate material, and the bridge plate material mounting A heavy article transporting apparatus configured to connect the joint plate and the bridge plate material via a structure and to ground the bridge plate material to the floor surface.   The heavy article transport device according to claim 1, wherein the joint plate and the bridge plate material are connected to each other on the outer peripheral side of a member corresponding to the joint plate among the members constituting the chain.   The bridge plate members are not connected to each other, and each sheet is provided on the outer peripheral edge side of the chain so as to bridge the outer peripheral edge side of the pair of left and right chains independently. Or the heavy article conveyance apparatus of 2.   The heavy-duty conveyance apparatus of any one of Claim 1 to 3 provided so that the outer peripheral edge side of the said chain may be bridged with a moderate gap | interval between the said bridge board | plate materials. 5. The heavy-duty carrying device according to claim 1, wherein a rotary seat is provided on an upper surface of the pedestal, and a heavy article can be rotatably placed on the rotary seat .   6. The heavy-duty carrying device according to claim 1, wherein a motor-driven rotation mechanism is provided for the sprocket, and the sprocket is rotated by using electric energy to control forward or backward movement. .   The ratchet rotation mechanism is provided with respect to the sprocket, a ratchet lever handle is attached, and the sprocket can be rotated manually via the ratchet rotation mechanism from outside to control forward or backward movement. The heavy goods conveyance apparatus of any one of these.

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