JP6460561B2 - Transport cart - Google Patents

Description

  The present invention relates to a transport cart for transporting a container formed of a synthetic resin or the like having horizontal and vertical reinforcing ribs on its side portions.

  In factories, warehouses, etc., synthetic resin containers for storing articles are used as returnable boxes, etc., and are transported in multiple stages on a cart. In general, this type of container is provided with a horizontal or vertical reinforcing rib projecting from the side to ensure strength.

  By the way, when placing a container stacked in multiple stages on the floor, it is necessary to lift the container and place it on the carriage. There is a burden on the workers. Therefore, Patent Document 1 discloses a technique for placing a carriage on the carriage without lifting the container simply by moving the carriage toward the container on the floor surface. In the container carrier disclosed in Patent Document 1, when the fork portion is inserted to position the container between the fork members, the end of the container hits the guide portion of the engagement / disengagement member, and the engagement / disengagement member is pushed to rotate upward. Then, once it escapes and comes to the position of the recessed portion of the container, the engaging / disengaging claw portion fits into the recessed portion, and the container is sandwiched between the pair of fork members via the engaging / disengaging member. Thereby, this container can lift and place the container placed on the floor directly only by moving forward.

Japanese Patent Laid-Open No. 61-278463

  However, since the carrier described in Patent Document 1 supports the container by engaging the engaging / disengaging member with the recessed portion on the side portion of the container, the reinforcing ribs in the vertical direction are provided in the horizontal intermediate portion of the recessed portion. Is formed, the engagement / disengagement member interferes with the reinforcing rib and the engagement / disengagement member cannot be fitted into the recessed portion, and the container cannot be supported.

  In addition, the engaging / disengaging member engages with the recessed portion of the container because it is engaged with the recessed portion on the side of the container by rotating in the vertical direction about the horizontal pivot tube attached to the lower end. In this case, since the load of the container is concentrated on the engaging / disengaging claw portion at the tip of the engaging / disengaging member, the engaging / disengaging claw portion is easily damaged and deformed.

  Further, the engaging / disengaging member pivots in the vertical direction about the pivot tube and engages / disengages with the recessed portion of the container. Therefore, the recessed portion of the container needs to be provided at a considerably high position from the bottom surface. In the case of a container in which the recessed portion is provided at a low position, the engaging / disengaging member cannot be engaged with the recessed portion of the container. There is a bug that you can not.

  Therefore, the present invention transports a container having horizontal and vertical reinforcing ribs protruding from the side, and the container can be loaded without being lifted by hand. The presence of reinforcing ribs in the vertical direction does not hinder loading, and the support part that supports the reinforcing ribs of the container can be stably supported with little damage and deformation. It is an object to provide a transport cart that can be loaded.

According to a first aspect of the present invention, there is provided a transport cart including a pair of parallel fork portions, and a container having a horizontal and vertical reinforcing rib projecting on a side portion thereof accommodated between the pair of fork portions and transported. In addition, a movable support portion that has a movable engagement piece that engages with a horizontal reinforcing rib of the container is provided at a front portion of the fork portion and supports a side portion of the container. The movable engagement piece is elastically biased and protrudes in a horizontal direction into the space between the pair of fork portions so that the container enters the space between the pair of fork portions. Accordingly, the container is pressed by the vertical reinforcing rib of the container and retracted outward to allow the container to enter, and after the vertical reinforcing rib has passed, the container returns elastically and moves inward to move forward. The reinforcing rib is formed to engage with the horizontal reinforcing rib to support the reinforcing rib from below.
Here, the front part of the fork part means a part on the tip side of the fork part. Moreover, the side part of a container is a part generally mounted in the front side of a conveyance trolley in a container, and the other side part of the container mentioned later is generally mounted in the back side of a conveyance trolley. Say the part.

Further, transportation cart of claim 1, prior SL fork is provided with a side plate which is bent vertically downward from the edge portion of the top plate and top plate, wherein the movable support is in the lower part of the top plate of the fork portion The movable engagement piece is formed at an end portion of the hook lever that is spaced apart from the vertical axis, and is formed on the side plate of the fork portion. It projects into the space between the pair of fork parts from the formed through window.
In addition, in the transport cart according to claim 1 , the hook lever of the movable support portion is formed of a flat plate and is interposed between the top plate of the fork portion and prevents the hook lever from tilting up and down. The spacer to be installed is standing.
The transport cart according to claims 2 to 4 further includes a fixed support portion that supports the other side portion of the container.

In the present invention, since the movable engagement piece of the movable support portion is formed so as to protrude forward and backward in the space between the fork portions, the vertical reinforcing rib is formed on the outer surface of the side portion of the container. This does not hinder loading, and can be placed on the transport cart simply by moving the transport cart forward toward the container without lifting the container.
In addition, since the movable engagement piece supports the horizontal reinforcing rib of the container on the entire surface, the container load is not concentrated on the narrow portion of the support portion, and therefore the movable engagement piece is damaged and deformed. Difficultly, the movable support portion can stably support the container.
In addition, since the movable engagement piece protrudes in the horizontal direction into the space between the fork portions, the horizontal reinforcing rib can be loaded on the transport cart corresponding to the container at the low position.

It is a perspective view which shows the conveyance trolley | bogie of embodiment of this invention. FIG. 1 shows the transport cart of FIG. 1, wherein (a) is a plan view and (b) is a right side view. 1 shows the frame of FIG. 1, (a) is a plan view, (b) is a front view, and (c) is a right side view. (a) is a perspective view of the movable support part of FIG. 2, (b) is a left side view of the hook lever of (a), and (c) is a plan view of the hook lever of (a). It is a front view which shows the method of mounting a container on the conveyance trolley | bogie of FIG. It is a top view which shows the state which mounted the container on the conveyance trolley | bogie of FIG. It is a left view which shows the state which mounted the container on the conveyance trolley | bogie of FIG. It is a front view which shows the state which moves the conveyance trolley | bogie of FIG. It is a front view which shows the state which stores the conveyance trolley | bogie of FIG.

  Hereinafter, a transport cart according to an embodiment of the present invention will be described with reference to the drawings. In the following embodiments, the direction in which the carriage is advanced will be described as the front, and the opposite side will be described as the rear.

  1 to 4, the transport cart 1 has a two-wheel structure, and a handle portion 12 is erected at a rear end portion of a frame 11 formed in a U shape in plan view. Of the pair of forks 21, 21 parallel to the frame 11, and a movable support portion 41 for supporting reinforcing ribs on both the left and right sides of the container 61 is provided. A fixed support portion 51 that supports the reinforcing ribs of the container 61 is provided at the rear portion of the 21 and 21, and the container 61 is accommodated and transported between the pair of fork portions 21 and 21. Hereinafter, each component will be described in detail.

  As shown in FIGS. 1 and 3, the frame 11 connects a pair of fork parts 21, 21 parallel to the traveling direction of the transport carriage 1 and the rear ends of the pair of fork parts 21, 21. It is comprised with the connection part 31, and is formed using steel materials. However, it is not limited to this, and you may form with an aluminum material, a synthetic resin material, etc. Each fork portion 21 is formed with a flange 23 bent vertically downward at an outer end of the top plate 22, that is, an end opposite to the fork portions 21 facing each other. A side plate 24 that is bent vertically downward is formed at the end of the fork part 21 side. The distance between the pair of fork portions 21 and 21 is slightly larger than the width of the container 61.

  As shown in FIG. 3 (b), the side plate 24 has a wheel mounting hole 24a for attaching the wheel 16 to the rear side of the fork portion 21, and the peripheral portion has the largest vertical length. The vertical length is gradually shortened in a curved shape toward the front. An elongated rectangular through window 24b through which a movable engagement piece 43 of a movable support portion 41, which will be described later, penetrates is formed at a position slightly rearward from the distal end portion of the side plate 24.

  The connecting portion 31 of the frame 11 is formed with a flange 33 bent vertically downward at an end portion on the rear side of the top plate 32, and has a constant width in a vertical direction bent vertically downward at an end portion on the front side of the top plate 32. Side plate 34 is formed.

  On the other hand, the handle portion 12 erected at the rear end portion of the frame 11 has a column pipe 13 erected by welding on the top plate 22 at the rear end portion of both fork portions 21, and the column pipe 13 extends in the height direction. The bent portion is bent obliquely rearward, and the bent inclined portion forms a handle 14. Further, the pair of left and right support pipes 13 and 13 are substantially intermediate portions in the height direction, and a reinforcing pipe 15 is installed in the horizontal direction. Further, the support pipe 13 is reinforced by a reinforcing plate 25 attached between the top plate 22 of the fork portion 21.

  Next, the movable support portion 41 provided at the front portion, that is, the front end side portion of each fork portion 21 is centered on the vertical shaft 26 that is suspended from the top plate 22 at the middle portion in the longitudinal direction of the fork portion 21. And a hook lever 42 that rotates horizontally. As shown in FIG. 4, the hook lever 42 is entirely formed of a flat plate, and a movable engagement piece 43 is integrally formed at the opposite end portion spaced from the mounting position of the vertical shaft 26. Further, the hook lever 42 is interposed between the upper surface of the hook lever 42 and the top plate 22 of the fork portion 21 on the side opposite to the movable engagement piece 43 on the upper surface of the opposite end portion of the hook lever 42. A rectangular plate-like spacer 44 that prevents tilting in the vertical direction within the space below the top plate 22 is provided.

  The movable engagement piece 43 projects in a direction perpendicular to the longitudinal direction of the hook lever 42, the projecting tip surface is a projecting end surface 43 a parallel to the longitudinal direction of the hook lever 42, and both projecting side surfaces project. The inclined end surface 43b is tapered toward the end surface 43a. Further, the movable engagement piece 43 is formed in such a size that the width dimension penetrates the through window 24 b of the side plate 24 of the fork portion 21.

  A spring mounting rod 27 is suspended from the lower surface of the top plate 22 at a position slightly spaced from the rear end of the hook lever 42 in the fork 21. Between the end portion of the hook lever 42 and the spring mounting rod 27, a tension spring 28 made of a coil spring that biases the end portion of the hook lever 42 in the direction of the spring mounting rod 27 is mounted. By this tension spring 28, the movable support portion 41 is always rotated about the vertical shaft 26 and is biased in a direction in which the movable engagement piece 43 at the end protrudes from the through window 24 b of the side plate 24 of the fork portion 21. The movable engagement piece 43 is elastically advanced and retracted from the through window 24b of the side plate 24 inward and outward.

  On the other hand, on the rear side of the carriage 1, fixed support portions 51 made of L-plates are projected in the horizontal direction at two corner portions on the inner side where the fork portion 21 and the connecting portion 31 of the frame 11 are joined. ing. On the fixed support portion 51, the side portion of the rear side corner which is the other side portion of the container 61 is placed.

  Next, the container 61 transported by the transport carriage 1 is formed into a box shape by molding a synthetic resin material, and flat reinforcing ribs having a predetermined protruding length are formed on the sides of the four surfaces of the container 61. Projecting perpendicularly to the outer surface. In the reinforcing rib, reinforcing ribs 62 that protrude in the horizontal direction and reinforcing ribs 63 that protrude in the vertical direction are arranged in a lattice pattern. These reinforcing ribs increase the rigidity and strength of the synthetic resin container 61 to prevent its deformation. Although not shown, the container 61 has an engaging portion that engages with the upper opening edge and the bottom edge of the container 61 in the vertical direction, and can be stacked in a plurality of stages.

Next, a method for transporting the container 61 using the transport cart 1 configured as described above will be described.
The containers 61 are stacked on the floor surface 71 in a plurality of stages, in this embodiment, in four stages. As shown in FIG. 5, the operator holds the handle 14 and pushes it from the rear to move the transport cart 1 forward as it is with respect to the container 61. At this time, the movable engagement piece 43 of the transport carriage 1 is elastically biased in the direction of the space between the pair of fork parts 21 and 21 by the tension spring 28 and protrudes from the through window 24b of the side plate 24 of the fork part 21. ing. When the carriage 1 is further pushed in this state, the inclined end face 43b on the front side of the movable engagement piece 43 comes into contact with the vertical reinforcing rib 63 of the lowermost container 61, but the movable engagement piece 43 is elastic. Since the side plate 24 advances and retreats in and out of the through window 24b of the side plate 24, when pushed by the vertical reinforcing rib 63, as shown by a two-dot chain line in FIG. Retreat toward. As a result, the container 61 is not prevented from moving forward by the vertical reinforcing rib 63 and is allowed to enter between the pair of fork parts 21 and 21. At this time, the horizontal reinforcing rib 62 of the container 61 moves slightly above the movable engagement piece 43.

  When the vertical reinforcing rib 63 passes through the portion of the through window 24b of the side plate 24, the movable engagement piece 43 is elastically restored and penetrates the through window 24b, and again in the space between the pair of fork portions 21 and 21. Protrusively. Subsequently, when the next vertical reinforcing rib 63 approaches, similarly, the movable engagement piece 43 retreats outward from the through window 24b of the side plate 24, and the vertical reinforcing rib 63 passes through the through window 24b. When it passes, it elastically returns again and protrudes inward from the through window 24b of the side plate 24. Hereinafter, the movable engagement piece 43 repeatedly advances and retreats in and out from the through window 24b of the side plate 24 every time it passes through the vertical reinforcing rib 63, and the container 61 is not prevented from entering by the movable engagement piece 43. Finally, it is completely accommodated in the space between the pair of fork parts 21 and 21. When completely accommodated, the side portion of the rear side corner, which is the other side portion of the container 61, is placed on the fixed support portion 51 of the transport carriage 1. The state after housing is shown in FIGS.

  Next, when the transport cart 1 accommodates the container 61 in the space between the pair of fork portions 21 and 21 as described above, the handle 14 of the handle portion 12 is slightly pushed down as shown in FIG. Tilt backwards. Thereby, the bottom surface of the lowermost container 61 is separated from the floor surface 71, the horizontal reinforcing rib 62 of the lowermost container 61, the movable engagement piece 43 and the fixed support part of the movable support part 41 of the transport carriage 1. The horizontal reinforcing rib 62 of the lowermost container 61 is supported by the movable engaging piece 43 and the fixed support portion 51 from below. Thus, by moving the transport carriage 1 forward in this state, the plurality of stages of containers 61 can be transported to a predetermined place at a time.

  After transporting to a predetermined place, if the transport carriage 1 is returned to the parallel state in the reverse procedure, the lowermost container 61 is placed on the floor surface 71, and the horizontal reinforcing rib 62 of the lowermost container 61 is transported. Since the movable engagement piece 43 and the fixed support portion 51 of the movable support portion 41 of the carriage 1 are slightly separated from each other, it is possible to push down only the transport carriage 1 as it is. Even when the vehicle is pushed backward, the movable engagement piece 43 of the movable support portion 41 of the carriage 1 and the vertical reinforcing rib 63 of the lowermost container 61 are in contact with each other. Since the joining piece 43 elastically advances and retreats in and out from the through window 24b, the vertical reinforcing rib 63 of the container 61 does not become an obstacle when the transport cart 1 is pulled out.

  As shown in FIG. 9, when the transport cart 1 is in an empty state, the transport cart 1 is tilted forward to ground a total of four locations including the pair of wheels 16 and 16 and the tip portions of the pair of fork portions 21 and 21. Since the center of gravity of the transport carriage 1 is located between the wheel 16 and the tip of the fork portion 21, it can be made independent and can be stored as it is, without taking a special storage place. .

Next, the operation of the transport carriage 1 of this embodiment will be described.
In the carriage 1, the movable engagement piece 43 of the movable support portion 41 protrudes from the through window 24 b of the side plate 24 of the fork portion 21 by an elastic biasing force so as to advance and retreat, so that it is perpendicular to the outer surface of the side portion of the container 61. Even if the reinforcing rib 63 is formed, the container 61 can be moved and accommodated in the space between the pair of fork portions 21 and 21. Accordingly, it is not necessary to lift the container 61 once and place it on the carriage as in the prior art, and the container can be moved between the movable engagement piece 43 and the fixed support portion 51 simply by moving the carriage 1 forward relative to the container 61. The 61 horizontal reinforcing ribs 62 can be supported and can be placed on the transport cart 1. For this reason, work efficiency improves and it can convey easily.

  Further, since the movable engagement piece 43 protruding from the through window 24b of the side plate 24 of the fork 21 is formed as a flat plate and protrudes in the horizontal direction, the entire upper surface of the flat plate is in contact with the horizontal reinforcing rib 62 of the container 61. Support this by touching. For this reason, the movable engagement piece 43 does not intensively apply the load of the container 61 to the tip corner of the engagement / disengagement claw part of the engagement / disengagement member as in the cited reference 1 of the conventional example. Since the support area with the reinforcing rib 62 is large, it is difficult to be damaged and deformed, and the container 61 can be supported stably.

  Furthermore, since the movable engagement piece 43 protrudes in the horizontal direction from the through window 24b of the side plate 24 of the fork portion 21, it engages with the reinforcement rib 62 even when the horizontal reinforcement rib 62 of the container 61 is at a low position. And can be placed on the transport carriage 1.

  The hook lever 42 rotates in the horizontal direction around the vertical shaft 26, and the movable engagement piece 43 is formed at a position considerably spaced from the vertical shaft 26. Therefore, the amount of elastic deformation of the tension spring 28 is small. Even if it exists, the protrusion length of the movable engagement piece 43 can be taken large enough. For this reason, even if the width dimension of the fork part 21 is small and the space for accommodating the movable support part 41 is small, the protruding amount of the movable engagement piece 43 from the through window 24b of the side plate 24 is increased to reliably support the container 61. Can be made. In addition, since the movable engagement piece 43 is formed at a position considerably spaced from the vertical shaft 26 and has a large turning radius around the vertical shaft 26, the movable engagement piece 43 moves in a direction substantially orthogonal to the side plate 24. The through-hole 24b is inserted / removed in a straight line. As a result, the movable engagement piece 43 abuts substantially perpendicularly to the side surface of the container 61, and supports the horizontal reinforcing rib 62 stably and accurately.

  In addition, since the spacer 44 is erected at the end of the hook lever 42 of the movable support portion 41, when the movable engagement piece 43 supports the horizontal reinforcing rib 62 of the container 61 from below, When the load of the container 61 is applied to the movable engagement piece 43, the hook lever 42 can be prevented from tilting in the vertical direction, and the movable support portion 41 can stably support the container 61.

  Moreover, since the fixed support part 51 in which the back side corner | angular part which is the other side part of the container 61 is mounted is provided in the rear part side of the conveyance trolley 1, a pair of movable support part 41 and a pair of fixed support The horizontal reinforcing ribs 62 are supported at four locations with the portion 51, and the container 61 can be stably supported. In addition, since the fixed support portion 51 is provided at the joint portion between the fork portion 21 and the connecting portion 31, it also serves as reinforcement of the frame 11.

  By the way, the hook lever 42 that forms the movable support portion 41 of the above embodiment is formed of a flat plate, and a spacer 44 is erected on the end portion of the upper surface, but is not limited to this shape. It may be formed in a flat plate having a constant thickness including the height of the spacer 44.

Moreover, although the movable engagement piece 43 of the said embodiment is formed with the hook lever 42, and it is formed so that it may rotate in the horizontal direction centering | focusing on the vertical axis | shaft 26, it is not necessarily limited to this,
This does not prevent the configuration in which the tension spring 28 is disposed and attached in the vicinity of the movable engagement piece 43.

  In addition, the fixed support portion 51 of the above embodiment is provided at two corner portions on the inner side where the fork portion 21 and the connecting portion 31 of the frame 11 are joined. The connecting portion 31 may be provided only at the rear end portion of the fork portion 21.

  In the transport cart 1 of the above embodiment, the distance between the pair of fork parts 21 and 21 is formed to be constant, but the distance may be variable according to the width of the container 61.

Furthermore, although the transport cart 1 is a two-wheel cart, it may be a four-wheel cart.
Moreover, although the conveyance trolley | bogie 1 shall push forward the handle | steering-wheel part 12 by hand, it is good also as what is advanced electrically.

  The transport cart 1 of the present invention can also be applied to the case where oblique reinforcing ribs are provided on the outer surface of the container 61, and the movable engagement of the movable support portion 41 as the container 61 enters. When the piece 43 interferes with the oblique reinforcing rib 63, the movable engaging piece 43 recedes outward and does not prevent the container 61 from entering, like the vertical reinforcing rib 63.

DESCRIPTION OF SYMBOLS 1 Carriage cart 41 Movable support part 11 Frame 42 Hook lever 21 Fork part 43 Movable engagement piece 22 Top plate 44 Spacer 24 Side plate 51 Fixed support part 24b Through window 61 Container 26 Vertical shaft 62 Horizontal reinforcement rib 28 Tension spring 63 Vertical Directional reinforcement rib

Claims (4)

A transport cart that includes a pair of parallel fork portions, and that accommodates and transports a container in which horizontal and vertical reinforcing ribs protrude from the side between the pair of fork portions,
A movable support part that has a movable engagement piece that engages with a horizontal reinforcing rib of the container is provided at a front part of the fork part, and supports a side part of the container.
The movable engagement piece is elastically biased and protrudes in a horizontal direction into the space between the pair of fork parts, and the container enters the space between the pair of fork parts. The container is pressed by the vertical reinforcing rib of the container and retracted outward to allow the container to enter, and after the vertical reinforcing rib has passed, the container is elastically restored and moved inward to move in the horizontal direction of the container. The reinforcing rib is engaged with the reinforcing rib to support the reinforcing rib from below ,
The fork part includes a top plate and a side plate bent vertically downward from an end of the top plate,
The movable support portion is formed of a hook lever made of a flat plate that rotates in a horizontal direction around a vertical axis provided at a lower portion of the top plate of the fork portion,
The movable engagement piece is formed at an end portion of the hook lever that is separated from the vertical axis, and protrudes in a space between the pair of fork portions from a through window formed in a side plate of the fork portion. And
The transport cart according to claim 1, wherein a spacer is provided between the hook lever and the top plate of the fork portion to prevent the hook lever from tilting in the vertical direction . A transport cart that includes a pair of parallel fork portions, and that accommodates and transports a container in which horizontal and vertical reinforcing ribs protrude from the side between the pair of fork portions,
A movable support part that has a movable engagement piece that engages with a horizontal reinforcing rib of the container is provided at a front part of the fork part, and supports a side part of the container.
The movable engagement piece is elastically biased and protrudes in a horizontal direction into the space between the pair of fork parts, and the container enters the space between the pair of fork parts. The container is pressed by the vertical reinforcing rib of the container and retracted outward to allow the container to enter, and after the vertical reinforcing rib has passed, the container is elastically restored and moved inward to move in the horizontal direction of the container. The reinforcing rib is engaged with the reinforcing rib to support the reinforcing rib from below,
Luck搬台car you comprising the fixed support portion for supporting the other side of the container. A transport cart that includes a pair of parallel fork portions, and that accommodates and transports a container in which horizontal and vertical reinforcing ribs protrude from the side between the pair of fork portions,
A movable support part that has a movable engagement piece that engages with a horizontal reinforcing rib of the container is provided at a front part of the fork part, and supports a side part of the container.
The movable engagement piece is elastically biased and protrudes in a horizontal direction into the space between the pair of fork parts, and the container enters the space between the pair of fork parts. The container is pressed by the vertical reinforcing rib of the container and retracted outward to allow the container to enter, and after the vertical reinforcing rib has passed, the container is elastically restored and moved inward to move in the horizontal direction of the container. The reinforcing rib is engaged with the reinforcing rib to support the reinforcing rib from below,
The fork part includes a top plate and a side plate bent vertically downward from an end of the top plate,
The movable support portion is formed by a hook lever that rotates in a horizontal direction around a vertical axis provided at a lower portion of the top plate of the fork portion,
The movable engagement piece is formed at an end portion of the hook lever that is separated from the vertical axis, and protrudes in a space between the pair of fork portions from a through window formed in a side plate of the fork portion. And
Luck搬台car you comprising the fixed support portion for supporting the other side of the container. The transport cart according to claim 1, further comprising a fixed support portion that supports the other side portion of the container.

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