JP7285207B2 - Foldable carrier - Google Patents

Description

TECHNICAL FIELD The present invention relates to a folding conveying device that conveys an object placed directly or indirectly on conveying rollers by, for example, manually moving the object.

Conventional foldable conveyors are equipped with a pair of left and right telescoping support frames with support legs at predetermined positions, and there is a telescoping roller conveyor that can be compacted by contracting the telescoping support frame when not in use ( Patent document 1).

In addition, in order to store a plurality of transport devices with good space efficiency when not in use and to simplify the configuration, a substantially Z-shaped leg is provided in a plan view. When it is not in use, it is rotated upward to be in an upright non-use state inclined with respect to the horizontal direction. There is a structure in which a plurality of conveying devices can be superimposed on each other in the front-rear direction by providing a body so that the conveying bodies in an upright state face each other when not in use (Patent Document 2).
(Patent Document 2).

Japanese Patent Application Laid-Open No. 2002-240915 JP-A-2006-256799

By the way, for example, when there are many victims who are contaminated with harmful substances due to an NBC disaster, etc., showers are usually installed in tents near the disaster site or at the entrance of medical institutions to prevent secondary infection. Emergency decontamination equipment will be set up to enable decontamination. In that case, a transportation device is needed to transport victims one after another into the decontamination facility as an emergency. The transport device is compact so that it does not take up a storage space when not in use, is lightweight so that it can be easily transported to the installation site of the decontamination equipment, and is easy to install and remove. is required.

However, the conventional extendable roller conveyors and transfer devices described above cannot sufficiently meet these demands. That is, due to their structure, they are heavy and laborious to transport to the required location. In addition, in the telescopic roller conveyor provided with the left and right telescopic support frames having the support legs described above, the telescopic support frame can be retracted in the front-back direction when not in use, but cannot be retracted in the left-right direction. is always arranged above the upper end of the support leg, the occupied space becomes large when not in use, and is not sufficient from the viewpoint of compactness when not in use. In addition, in the above-mentioned conveying device in which the conveying body is rotatably provided, the conveying body having the conveying rollers stands upright above the legs when not in use. However, it is not sufficient from the viewpoint of compactness and ease of transportation, installation and withdrawal.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a foldable transport device that is relatively lightweight, can be folded compactly when not in use, and can be easily installed and removed in a short period of time. aim.

Means for solving the problem and effects of the invention

According to the folding conveying apparatus according to the first aspect of the present invention, a plurality of legs that are stretchable in the longitudinal direction are arranged in two rows in the front-rear direction so as to form a pair of left and right legs, and the front and rear of the plurality of legs are arranged in two rows in the front-rear direction. A unit X-shaped link member provided for each leg adjacent to each other and for each leg adjacent to each other in the left and right direction, and a unit X-shaped link member that connects the adjacent legs so as to form a telescopic link mechanism, and each leg adjacent to each other in the left and right direction a conveying roller comprising a support shaft and a cylindrical body rotatably passed through the support shaft; and one end of the support shaft provided at the upper end of one of the legs adjacent to each other in the left-right direction. a holding portion that holds the portion so as to be rotatable about the axis in the front-rear direction; and the support shaft rotates about the axis in the front-rear direction, whereby the conveying rollers open the plurality of legs. When both ends of the support shaft are placed on the upper ends of the legs adjacent in the left-right direction, the support shaft is placed in a conveying position, and when the plurality of legs are closed, it is placed in a retracted position along one of the legs.

With this configuration, the legs can be folded in the front-rear direction and the left-right direction with the legs approaching each other, and the transport rollers can be arranged at the retracted positions along the legs, so that the folding can be made compact. When folded, it has a substantially rectangular parallelepiped shape, so it is relatively stable even in an upright state. Therefore, it is convenient to handle. Further, when folding, the conveying roller can be lifted by hand and turned around one end of the support shaft so that it can be retracted to the retracted position. Moreover, since the portion of the table that supports the transport rollers constitutes a telescopic link mechanism, by moving a pair of adjacent legs toward and away from each other, the legs move together to approach and separate from each other. Therefore, installation and withdrawal are easy. Furthermore, since the structure is simple, the weight can be reduced. Therefore, it is possible to obtain a folding conveying device that is relatively lightweight, can be folded into a compact size when not in use, is convenient for storage and transportation, and can be easily installed and removed in a short time.

Further, according to the folding conveying device according to the second aspect of the present invention, the holding portion includes a first bracket fixed to project outward in the left-right direction from an upper end portion of the one leg; One end of the support shaft is rotatably mounted on a free end of the auxiliary arm. Configurable.

With this configuration, when the transport roller is placed in the transport position, both ends of the support shaft of the transport roller are securely placed on the upper ends of the legs adjacent to each other in the left-right direction. can be supported by the laterally adjacent legs, and the holding part need not support a large downward load. Therefore, the holding portion can be made compact. Moreover, since there is no problem even if the first bracket, the auxiliary arm, etc. have some errors in processing or assembling, processing and assembling of the holding portion are easy. Further, when the legs are closed and the conveying rollers are placed at the retracted position, the free ends of the auxiliary arms are retracted below the upper ends of the legs, so that there is practically nothing protruding above the upper ends of the legs. Therefore, the folding conveying device can be stacked and stored on the upper surface of the folding conveying device that is folded and placed in an upright state.

Further, according to the folding conveying device according to the third aspect of the present invention, the other one of the support shafts is provided at the upper end of the other one of the legs adjacent in the left-right direction. can be configured to include a stop that can engage an end of the to prevent forward movement of that end.

With this configuration, the load in the front-rear direction applied to the conveying roller during use is distributed between the stopper and the holding portion, so that the load on the holding portion is reduced, and the holding portion can be made compact.

Further, according to the folding conveying device according to the fourth aspect of the present invention, the leg has a first joint fixed to the upper end of the leg and a second joint fixed to the lower end of the leg. wherein the first joint has the first bracket, and the first joint and the second joint each connect the front end portion of the unit X-shaped link member that connects the legs adjacent to each other in the left-right direction. It has a second bracket for rotatably connecting and a third bracket for rotatably connecting the tip of the unit X-shaped link member that connects the legs adjacent to each other in the front-rear direction. can.

With the above configuration, the work of forming the first bracket, the second racket, and the third bracket on the upper end and the lower end of the leg is compared to the case where these member pieces are directly joined by welding or the like. , making it possible to obtain a folding carrier with a very low manufacturing cost.

Furthermore, according to the folding conveying device according to the fifth aspect of the present invention, the other one end of the support shaft is formed with a downward protrusion, and the two legs adjacent to each other on the left and right sides are formed with downward projections. The first bracket of the first joint fixed to the upper end of the other one of the legs can be used as the stopper that engages with the protrusion.

With the above configuration, the first joint provided at the upper end of the leg can be shared, and the work of installing the first bracket, the second bracket, and the third bracket at the upper end of the leg can be facilitated. It is possible to further reduce the manufacturing cost of the transport device.

1 is a perspective view of a folding carrier according to an embodiment of the present invention; FIG. FIG. 10 is a perspective view of the first joint, showing the upper surface, front side surface and left side surface of the first joint fixed to the upper end of the leg on the holding portion side of the horizontally adjacent columns. It is a perspective view of the first joint, showing the lower surface, the rear side surface and the left side surface of the first joint fixed to the upper end of the leg on the holding portion side of the columns adjacent in the left-right direction. FIG. 4 is a front view showing a state of the folding conveying device in use; FIG. 10 is a front view showing a state in which the conveying roller is retracted; It is a front view which shows the state which folded the folding type conveying apparatus. FIG. 4 is a side view showing a state in which the folding transport device is folded;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. However, the embodiments shown below are examples of folding conveying devices for embodying the technical idea of the present invention, and the present invention does not specify them to the following. In addition, this specification does not specify the members shown in the claims as the members of the embodiment. Unless otherwise specified, the dimensions, materials, shapes, relative arrangements, etc. of components described in the embodiments are not intended to limit the scope of the present invention, but are merely explanations. Just an example. Note that the sizes and positional relationships of members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same names and symbols indicate the same or homogeneous members, and detailed description thereof will be omitted as appropriate. Furthermore, each of the elements constituting the present invention may be configured with the same member so that a single member may serve as a plurality of elements, or conversely, the function of one member may be performed by a plurality of members. It can also be realized by sharing.

1 to 6 show an embodiment of a folding transport device according to the invention. In FIG. 1 , arrow A indicates the front-rear direction of the folding conveying device 1 , and arrow B indicates the left-right direction of the folding conveying device 1 . The folding conveying device 1 includes a plurality of legs 2 that are extendable in the longitudinal direction and arranged in two rows in the front-rear direction so as to form a left-right pair. A unit X-shaped link member 3 provided for each adjacent leg and connecting the adjacent leg 2 so as to form an elastic link mechanism, and a support shaft 4 provided for each leg adjacent in the left-right direction and the support shaft. 4 and one end 4a of the support shaft 4 provided at the upper end of one of the legs 2 adjacent in the left-right direction. A holding portion 7 is provided so as to be rotatable around an axis in the front-rear direction.

The unit X-shaped link member 3 is constructed by intersecting two rod-shaped members 8 of the same length at their midpoints and connecting them to each other by a shaft 9 so as to be rotatable. In this embodiment, the two rod-like members 8 are made of square pipes made of an aluminum alloy in order to reduce the weight, and intersect each other in an overlapping state. The shaft body 9 consists of a countersunk head screw and a nut having a locking function screwed to the tip of the head. It rotatably penetrates the point. The two rod-like members 8 may be overlapped with a seat plate made of a material having a small coefficient of friction sandwiched therebetween, for example, in order to reduce mutual rotation resistance.

The leg 2 comprises a first joint 12 fixed to the upper end of the leg 2 and a second joint 13 fixed to the lower end of the leg 2 . In this embodiment, the leg 2 consists of a column member 2a and a slide member 2b slidably attached to the column member 2a in the longitudinal direction. The slide member 2b is made of an alloy square pipe, and the upper end of the slide member 2b is loosely fitted into the hollow portion of the column member 2a.

2A shows the upper surface, front side surface and left side surface of the first joint 12 fixed to the upper end of the leg 2 on the holding part 7 side of the legs 2 adjacent in the left-right direction in FIG. 1, and FIG. The underside, rear side and left side of the first joint 12 are shown. The first joint 12 has a first bracket 14 , a second bracket 15 and a third bracket 16 .

The first bracket 14 comprises a pair of front and rear arm portions 14a, and is formed integrally with the body portion 12a of the first joint 12 so as to protrude from the body portion 12a toward the holding portion 7 side. That is, the first bracket 14 is fixed to the first joint 12 so as to protrude outward in the left-right direction from the upper end of one leg 2 of the left and right adjacent legs 2 shown in FIG. A hole 17 is formed in one of the pair of front and rear arm portions 14a of the first bracket 14, and a screw hole 18 is formed in the other on the same longitudinal axis.

The second bracket 15 is used to rotatably connect the distal ends of the unit X-shaped link members 3 that connect the legs 2 adjacent to each other in the front-rear direction. It is installed on the front and rear sides. As shown in FIG. 2, it consists of a pair of left and right arm portions 15a and reinforcing portions 15b provided at the upper ends of the pair of left and right arm portions 15a, and protrudes forward or backward from the body portion 12a of the first joint 12. It is formed integrally with the main body portion 12a. A hole 17 extending in the left-right direction is formed in one of the pair of left and right arm portions 15a of the second bracket 15, and a screw hole 18 is formed in the other one thereof on the same axis in the left-right direction.

The third bracket 16 is for rotatably connecting the distal ends of the rod members 8 of the unit X-shaped link members 3 connecting the legs 2 adjacent in the left-right direction. The third bracket 16 and the second bracket 15 are different from each other in that they are arranged with a rotation angle of 90 degrees about the central axis in the vertical direction with respect to the main body 12a of the first joint 12. The dimensions and functions of both are the same. The first bracket 14, the front and rear second brackets 15 and the third brackets 16 are arranged so as to be point symmetrical with respect to the center axis of the body portion 12a in the vertical direction.

A hole 19 is formed in the body portion 12a of the first joint 12, and the upper end portion of a joint piece 20 having the same thickness as the slide member 2b is fitted in the hole 19. As shown in FIG. The first joint 12 is made of a synthetic resin having a high mechanical strength in order to reduce the weight and enable mass production with relative ease.

The first joint 12 is fixed to the upper end of the leg 2 by fitting the upper end of the joining piece 20 into the hole 19 formed in the main body 12a of the first joint 12 and fixing it with the set screw 21. The lower end of the piece 20 is fitted into the hollow part of the upper end of the column member 2a and fixed by the set screw 22 to the column member 2a. The lower end of the slide member 2b is fitted in the hole 19 formed in the main body portion 13a of 13 and fixed to the slide member 2b with a set screw 23. As shown in FIG.

The first joint 12 fixed to the upper end of the leg 2 on the side opposite to the holding portion 7 among the legs 2 adjacent to each other on the left and right, and the second joint 13 fixed to the lower end of each leg 2 facilitate manufacturing and Moreover, in order to reduce the manufacturing cost, it is substantially the same as the first joint 12 on the holding part 7 side, and is fixed to the leg 2 in the same manner as the first joint 12 described above.

In FIG. 3, two rod-shaped members 8 of the unit X-shaped link member 3 between the legs 2 adjacent to each other on the left and right are provided at both ends of the two rod-shaped members 8 so that the distances from their midpoints are equal and on the shaft 9. Holes are formed in parallel. The end of the rod-shaped member 8 and the third bracket 16 are arranged such that the end of the rod-shaped member 8 is inserted between the pair of arm members 16a, and the shaft 24 made of a countersunk head screw is passed through the hole 17 of the third bracket 16. Furthermore, by passing through the hole at the end of the rod-shaped member 8 and screwing the screw at the tip of the shaft 24 into the screw hole 18 and fixing it, it is connected so as to be rotatable about the shaft 24 . . The unit X-shaped link member 3 between the legs 2 adjacent in front and back is also substantially the same as the unit X-shaped link member 3 between the legs 2 adjacent in the left and right, and the unit between the legs 2 adjacent in the front and back. The end of the rod-shaped member 8 of the X-shaped link member 3 and the second bracket 15 are also rotatably connected about the shaft 24 in the same manner as the unit X-shaped link member 3 between the legs 2 adjacent to each other on the left and right. There is.

When the folding transport device 1 is used, the holding part 7 arranges the transport rollers 6 so that both ends of the support shaft 4 rest on the upper ends of the legs 2 adjacent in the left-right direction, and the plurality of legs 2 are closed. In order to hold the support shaft 4 so that the conveying roller 6 can be arranged along the left leg 2, it is fixed to the upper end of the leg 2 on the holding part 7 side of the pair of left and right legs 2. and an auxiliary arm 25 attached to the first bracket 14 so as to be swingable about the axis in the front-rear direction. The end portion of the support shaft 4 of the transport roller 6 on the side of the holding portion 7 is rotatably attached to the free end portion of the auxiliary arm 25 .

In this embodiment, the auxiliary arm 25 is attached to the first bracket 14 by inserting the end portion of the auxiliary arm 25 on the side of the holding portion 7 between the pair of arm portions 14a of the first bracket 14 and tightening the countersunk machine screw. is passed through the hole 17 in one arm portion 14a of the first bracket 14 through the hole formed in the lower end of the auxiliary arm 25, and the screw at the tip of the shaft 26 is screwed into the screw hole 18. This is done by combining The end of the support shaft 4 on the side of the holding portion 7 is attached to the auxiliary arm 25 by inserting the shaft 27 made of a pan screw extending in the front-rear direction into the hole formed in the auxiliary arm 25 and the holding portion of the support shaft 4 . A nut 28 having a locking function is screwed onto the screw at the tip of the shaft 27 through a hole formed in the end on the 7 side.

A projecting portion 29 is formed downward at the end portion of the support shaft 4 opposite to the holding portion 7 . The protrusion 29 is fitted between the pair of arm portions 14a of the first bracket 14 of the first joint 12 fixed to the upper end of the leg 2 on the side opposite to the holding portion 7 of the leg 2 adjacent to the left and right. placed so that it can be

The folding transport device 1 configured as described above is placed on the ground or floor with the legs 2 opened as shown in FIG. Fold as shown in FIGS.

The conveying rollers 6 indicated by solid lines in FIG. 3 are at the conveying position for conveying the object to be conveyed, and the conveying rollers 6 indicated by solid lines in FIG. In order to fold the folding type conveying device 1, each conveying roller 6 attached to the conveying position is retracted to a retracted position along the leg 2 on the side of the holding portion 7, and then the adjacent legs 2 are brought close to each other by hand to form a plurality of rollers. The legs 2 are closed as shown in FIGS. When the legs 2 are closed, the post member 2a slides upward relative to the slide member 2b, thereby extending each leg 2 longitudinally.

In FIG. 3, in order to retract the transport roller 6 at the transport position to the retracted position along the leg 2 on the holding portion 7 side, the transport roller 6 is lifted by hand and turned toward the holding portion 7 side. The transport roller 6 indicated by a two-dot chain line in FIG. 4 is in a state slightly lifted from the transport position. , the auxiliary arm 25 rotates clockwise around the shaft body 26 with respect to the first bracket 14 . Then, when the transport roller 6 is further lifted and turned around the end of the support shaft 4 on the side of the holding part and pushed down to the side of the holding part 7, the transport roller 6 and the auxiliary arm 25 are brought to the retracted position.

To install the folding transport device 1, the adjacent legs 2 are separated from each other by hand to open the adjacent legs 2 as shown in FIG. , turn to the side opposite to the holding part 7 and lay down. As a result, the protrusion 29 provided at the end of the support shaft 4 opposite to the holding portion 7 is aligned with the pair of arms of the first bracket 14 of the first joint 12 fixed to the leg 2 opposite to the holding portion 7. While being fitted between the portions 14a, both ends of the support shaft 4 are placed on the upper surfaces of the first joints 12 fixed to the pair of left and right legs 2, respectively, and the transport roller 6 reaches the transport position. As a result, the downward load and the forward load due to the weight of the transport roller 6 acting on the transport roller 6 when the transport object is transported can be reliably supported by the platform formed by the adjacent legs 2 and the unit X-shaped link members 3. be able to.

Usually, when the object to be conveyed by the folding conveying device 1 is a person, luggage, etc., the object to be conveyed is placed on a platform made of a plate, pallet, or the like having a length of at least twice the interval between the conveying rollers 6, The loading platform is placed on the transport rollers 6, and the operator pushes the loading platform by hand to transport it. When the object to be conveyed is a long one such as a contaminated pipe, the object to be conveyed can be conveyed directly on the conveying rollers 6 without using a loading platform. If the conveying route is too long and a single folding conveying device 1 cannot provide a sufficient conveying route length, a plurality of folding conveying devices 1 can be installed side by side in the longitudinal direction to obtain the required conveying route length. can be obtained.

An embodiment of the present invention has been described above. According to the present invention, the number of legs 2 provided in the folding conveying device 1 is not limited to six as shown in FIG. or more. For the pair of left and right legs 2 shown in FIG. In addition, instead of providing a protrusion 29 at the end of the support shaft 4 of the transport roller 6 opposite to the holding portion 7 and having the first bracket 14 at the first joint 12 opposite to the holding portion 7, , a stopper protruding upward from the upper end of the leg 2 on the side opposite to the holding portion 7 among the legs 2 adjacent to each other on the left and right is provided, and this stopper is provided on the side opposite to the holding portion 7 of the support shaft 4 of the conveying roller 6. In some cases, the stopper is engaged with the end so that the forward load acting on the end is received by the stopper. In addition, the holding portion 7 may be configured to support the load acting on the support shaft 4 of the conveying roller 6 in the front-rear direction. Alternatively, the first bracket 14, the second bracket 15, and the third bracket may be fixed directly to the leg 2 without using joints. Further, the holding portion 7 does not have the auxiliary arm 25, and only the first bracket 14 holds the end portion of the support shaft 7 on the side of the holding portion 7 so as to be rotatable about the axis in the front-rear direction. In some cases, it may be possible to attach it to the transport position or to attach it to the shunting position.

The folding transport device of the present invention is used not only for transporting victims contaminated with harmful substances in an NBC disaster or the like to decontamination equipment, but also for transporting patients to ambulances in rescue activities, or It can also be used in other applications, such as for transporting other items such as luggage to a desired location.

REFERENCE SIGNS LIST 1 Folding transport device 2 Leg 2a Column member 2b Slide member 3 Unit X-shaped link member 4 Support shaft 5 Cylindrical body 6 Transport roller 7 Holding portion 8 Bar member 9 Shaft 10 ... cover 11 ... bolt 12 ... first joint 13 ... second joint 14 ... first bracket 14a ... arm portion 15 ... second bracket 15a ... arm portion 15b ... reinforcement portion 16 ... third bracket 17 ... hole 18 ... screw Hole 19... Hole 20... Joining piece 21... Set screw 22... Set screw 23... Set screw 24... Shaft 25... Auxiliary arm 26... Shaft 27... Shaft 28... Nut 29... Projection

Claims (5)

a plurality of legs that are stretchable in the longitudinal direction and arranged in two rows in the front-rear direction so as to form a pair of left and right;
a unit X-shaped link member provided for each leg adjacent to each other in the front and rear and for each leg adjacent to the left and right among the plurality of legs and connecting the adjacent legs so as to form an expansion and contraction link mechanism;
a conveying roller comprising a support shaft and a cylindrical body rotatably passed through the support shaft provided for each of the legs adjacent to each other in the left-right direction;
a holding part provided at the upper end of one of the legs adjacent to each other in the left-right direction and holding one end of the support shaft so as to be rotatable about an axis in the front-rear direction;
Since the support shaft rotates about the longitudinal axis, when the plurality of legs are opened, both ends of the support shaft rest on the upper ends of the legs adjacent to each other in the left-right direction. A folding conveying device configured to reach a retracted position along one of the legs when the plurality of legs are closed in the conveying position. A folding transport device according to claim 1, comprising:
The holding portion includes a first bracket fixed to protrude outward in the left-right direction from the upper end of one of the legs, and an auxiliary arm attached to the first bracket so as to be rotatable about an axis in the front-rear direction. consists of
One end of the support shaft is rotatably attached to the free end of the auxiliary arm. 3. A folding carrier according to claim 1 or claim 2, further comprising:
Engaging with the other one end of the support shaft provided at the upper end of the other one of the legs adjacent in the left-right direction to prevent forward movement of the end. A folding transport device with a stop that can be A folding transport device according to claim 2 , comprising:
the leg comprises a first joint secured to the upper end of the leg and a second joint secured to the lower end of the leg;
The first joint has the first bracket,
The first joint and the second joint each include a third bracket for rotatably connecting the distal ends of the unit X-shaped link members that connect legs adjacent in the left-right direction, and a third bracket adjacent in the front-rear direction. and a second bracket for rotatably connecting the ends of the unit X-shaped link members connecting the matching legs. A folding transport device according to claim 4, comprising:
a downward projection is formed on the other one end of the support shaft;
A folding conveying device using the first bracket of a first joint fixed to the upper end of the other one of the left and right adjacent legs as the stopper that engages with the protrusion.

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