JP2019182243A - Coupling device of conveyance truck - Google Patents

Abstract

To enable coupling of two conveyance trucks without blocking insertion holes of adjacent corner members, and without projecting in an upper surface of the conveyance trucks.SOLUTION: A conveyance truck 1 is configured by forming, in a corner member 4 of a corner part of a frame 3 being rectangular in plan view, insertion holes 6 to which a lower end of a support 5 can be inserted, and inserting a support stop member 7 at a lower part for stopping a lower end of the support 5. A plurality of the conveyance trucks 1 are arranged, and adjacent corner members 4 are coupled with a coupling metal fitting 11. The coupling metal fitting 11 includes a standing part 13 that is inserted from below to the insertion holes 6 at both ends of a metal fitting body part 12 crossing below two corner members 4 to be coupled, and a fitting part 14 that fits from above to the support stop member 7 in an upper part of the standing part 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connecting device for connecting a plurality of transport carts.

  A connecting member for connecting a plurality of transport carts disclosed in Patent Document 1 is a connecting member for connecting a plurality of transport carts provided with insertion holes for hand bars at corners of a cart body with a base mounted on a frame. And it is composed of a plate and a plurality of projecting members that project downward from the lower surface of the plate and are inserted into the insertion holes, and the projecting members are arranged adjacent to each other, An insertion hole for the push bar is provided between the protruding members so as to protrude downward from the plate.

Japanese Patent No. 5255362

  In the prior art, the connecting member has a plurality of projecting members projecting downward from the plate, and the plurality of projecting members can be easily inserted into the insertion holes of the transport cart. Although it can be connected, the insertion hole into which the protruding member is inserted is blocked from above, so that it is impossible to insert the hand bar, and the plate to which the protruding member is attached is placed on the flat upper surface of the transport carriage. Since it exists as a projection part, it will be caught in carrying in / out of the article | item to the upper surface of a conveyance trolley | bogie.

An object of this invention is to provide the connection apparatus of the transport trolley | bogie which enabled it to solve such a problem of a prior art.
The present invention relates to the connection of a transport cart that allows two transport carts to be connected by inserting both fitting portions of the connecting metal fittings from below into the insertion holes of adjacent corner members and fitting them into the support members. An object is to provide an apparatus.

Specific means for solving the problems in the present invention are as follows.
First, a support member 7 for forming an insertion hole 6 into which the lower end of the support column 5 can be inserted in the corner member 4 of the corner 3 of the rectangular frame 3 in plan view and for stopping the lower end of the support column 5 at the lower part. Is a connecting device for a transporting carriage 1 that constitutes a transporting cart 1, arranges a plurality of the transporting carts 1, and connects adjacent corner members 4 with connecting metal fittings 11,
The connection fitting 11 includes a rising portion 13 inserted from below into the insertion hole 6 at both ends of the fitting main body 12 crossing below the two corner members 4 to be connected, and a support member 7 at the top of the rising portion 13. And a fitting portion 14 fitted from above.

Secondly, the support members 7 are inserted from the outer corners of the corner members 4 on the outer side of the frame 3 to the inner corners of the inner side of the frame 3, and both the fitting parts 14 of the coupling metal 11 are inserted. In the hole 6, it has the space | interval which fits to the support | pillar fixing member 7 in the position close | similar to an outer corner | angular part from the center of the insertion hole 6.
Third, each insertion hole 6 of the adjacent corner member 4 is formed with a relief groove 16 having a groove bottom that is away from the center of the insertion hole 6 and closer to each other than the inner peripheral surface of the insertion hole 6. The interval between the two rising portions 13 of the connection fitting 11 is substantially equal to the interval between the two escape grooves 16, and the fitting portion 14 of the connection fitting 11 can be inserted between the groove bottom of the escape groove 16 and the support member 7. It is characterized by being formed.

Fourthly, the connecting metal fitting 11 is characterized in that the rising portion 13 is formed of a strip and the fitting portion 14 is formed by bending the end of the strip into a substantially U shape.
Fifth, the connecting metal fitting 11 is formed with a metal fitting main body 12 at the center of the round bar, bent upward at both ends of the metal fitting main body 12 to form a rising portion 13, and an upper portion of the rising rising portion 13. The fitting portion 14 is formed by being bent into a substantially U shape.

According to the present invention, by inserting both fitting portions of the connecting metal fittings from below into the insertion holes of the adjacent corner members and fitting with the support members, the insertion holes are not blocked from above, and Two transport carts can be connected without projecting to the upper surface.
That is, according to the first aspect of the present invention, the connecting metal fitting 11 includes the rising portion 13 inserted from below into the insertion hole 6 at both ends of the metal fitting main body portion 12 crossing the lower side of the two corner members 4 to be connected, and the rising edge. Since it has the fitting part 14 fitted to the support member 7 from the upper side at the upper part of the part 13, the rising part 13 and the fitting part 14 are inserted from below the two adjacent corner members 4 to insert the insertion hole 6. The fitting main body 12 does not protrude from the upper surface of the transport cart 1 and the fitting portion 14 is fitted to the support member 7 from above so that the two transport carts 1 are connected. be able to.

In the invention according to claim 2, the support member 7 is inserted from the outer corner portion of each corner member 4 to the inner corner portion, and both fitting portions 14 of the connecting metal fitting 11 are located in the insertion hole 6 from the center of the insertion hole 6. Since it has the space | interval fitted to the support | pillar stop member 7 in the position close | similar to an outer corner | angular part, it can prevent that the connected 2 conveyance cart 1 leaves | separates.
In the invention according to claim 3, relief grooves 16 are formed in each insertion hole 6 of the corner member 4, and the interval between both rising portions 13 of the connection fitting 11 is substantially equal to the interval between both escape grooves 16. The fitting portion 14 can be inserted through the space between the bottom of the escape groove 16 and the column stopper member 7 to above the column stopper member 7, and the fitting portion 14 can be fitted to the column stopper member 7.

In the invention according to claim 4, since the connecting metal 11 is formed with the rising portion 13 formed of a band plate and the fitting part 14 formed by bending the end of the band plate into a substantially U-shape. 11 can be manufactured easily and inexpensively.
In the invention according to claim 5, the connecting metal fitting 11 is formed with a metal fitting main body portion 12 at the center of the round bar, and both ends of the metal fitting main body portion 12 are bent upward to form a rising portion 13. Since the fitting part 14 is formed by bending the upper part of the connecting part 11 into a substantially U shape, the connecting fitting 11 can be manufactured easily and inexpensively.

It is a top view of the principal part which shows embodiment of this invention. It is a front view of the principal part. It is front explanatory drawing of the principal part. It is a perspective view of a connection metal fitting. 4A and 4B are four views of the connecting metal fitting, in which FIG. 3A is a plan view, FIG. 3B is a rear view, FIG. 3C is a bottom view, and FIG. It is a top view of the state which connected two transport carts. It is a front view of the state which connected two transport carts. It is a top view of the state which connected four transport carts. It is a 4th page figure which shows the modification of a connection metal fitting, Comprising: (E) is a top view, (F) is a front view, (G) is a bottom view, (H) is a side view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3, 6, and 7, two transport carts 1 are shown. Each transport cart 1 includes a base frame 3 and three parallel attachment bodies fixed to the bottom side of the base frame 3. 27 and a total of six wheels 9 attached to both end sides of each attachment body 27, and supports 5 serving as handles or partition bars can be erected at the four corners of the underframe 3.

The frame 3 is formed by connecting two parallel vertical members 22 and two parallel horizontal members 23 with four corner members 4 to form a rectangular shape (rectangular shape) in plan view. Between the vertical members 22, at least two vertical beam members 26 whose both ends are connected to the horizontal members 23 are provided, and the top plate 30 is fixed to the upper surfaces of the vertical members 22, the horizontal members 23, and the vertical beam members 26.
On the lower surface of the vertical member 22, the horizontal member 23, and the vertical beam member 26, three parallel attachment bodies 27 are installed between the two horizontal members 23.

In addition, since the conveyance trolley 1 has a rectangular shape that is long in the conveyance movement direction, the longitudinal direction is the longitudinal direction, a member that is long in the longitudinal direction is referred to as a longitudinal member, a direction perpendicular to the longitudinal direction is a lateral direction, and a member that is long in the lateral direction is It is called a transverse member. However, the frame 3 may be reversed in the vertical and horizontal directions, the vertical member 22 may be referred to as a horizontal member, and the horizontal member 23 may be referred to as a vertical member.
In FIG. 7, a wheel 9 is a caster wheel, and a yoke 9b is supported on a seat plate 9a having a substantially rectangular shape in plan view so as to be rotatable about a vertical axis, and a tire 9c is supported on the yoke 9b so as to be rotatable about a horizontal axis. is doing. The wheel 9 may be a unidirectional rotating wheel without a vertical axis.

Each of the attachment bodies 27 is formed of a pair of symmetrical parallel mold members 27A, is fixed to the lower surface of the underframe 3, and holds the side edge of the seat plate 9a of the wheel 9 from below.
The top plate 30 is formed with notches 30a at positions corresponding to the six wheels 9, and when the transport cart 1 is stacked up and down, the six wheels 9 of the upper transport cart 1 are located on the lower side. It enters six cutouts 30 a of the carriage 1 and is placed on the attachment body 27.

1, 2, 6, and 7, the vertical member 22, the horizontal member 23, and the vertical beam member 26 are formed in a square pipe shape with aluminum alloy or the like, and the corner member 4 is also extruded with an aluminum alloy.
The corner member 4 includes a cylindrical tubular portion 4A in which an insertion hole 6 penetrating vertically is formed, a pair of vertical connection pieces 4B connected with the vertical member 22 interposed therebetween, and a pair of horizontal connection pieces connected with the horizontal member 23 interposed therebetween. 4C and a pair of parallel engaging ribs 4D are formed long across the upper and lower ends.

The cylindrical portion 4 </ b> A of the corner member 4 forms an insertion hole 6 into which the lower end of the support column 5 can be inserted on the inner periphery, and a relief groove 16 that communicates with the insertion hole 6 and has a groove bottom concentric with the insertion hole 6. It is formed at two opposing positions, and a column stopper member 7 for stopping the lower end of the column 5 is inserted in the lower part.
Since the cylindrical portion 4A does not need to receive the support column 5 in the entire inner circumference of the insertion hole 6, a relief groove 16 is formed to reduce the material and reduce the weight. Strength is improved by forming the piece 4C and the engaging rib 4D.

The support member 7 is formed of a bolt, but may be a pin, a square bar or the like, and extends from an outer corner portion of each corner member 4 outside the frame 3 to an inner corner portion inside the frame 3. The column stopper members 7 of the adjacent corner members 4 are inclined by 45 degrees with respect to the vertical and horizontal directions, and the two are arranged in a right-angle V shape.
The support member 7 passes through the center of the insertion hole 6 in plan view, the center in the longitudinal direction is farthest from the inner peripheral surface of the insertion hole 6, and faces the distant part of the clearance groove 16 of the insertion hole 6. The maximum space is formed in the insertion hole 6 between the groove bottom of the escape groove 16 and the support member 7.

The pair of engaging ribs 4D are located in the vicinity of the inner pieces of the vertical connecting piece 4B and the horizontal connecting piece 4C, that is, in the inner corner portion inside the frame 3 of the corner member 4, and the protruding height thereof is low. The height of the nut 36 screwed onto the member 7 is substantially equal.
The bolt support member 7 is screwed into a nut 36 that is prevented from rotating around the engaging rib 4D while being inserted into the through hole at the bottom of the cylindrical portion 4A. This support member 7 may pass through the lower part of the support 5, but may also be a member that places the lower end of the support 5 to prevent it from coming out downward.

A cushioning material 34 formed of a rubber or resin cushioning material or the like is attached to the outer surface of the cylindrical portion 4A that forms the outer peripheral surface of the underframe 3. When the two transport carts 1 are connected side by side, the cushioning materials 34 of both are brought into contact with each other.
The two transport carts 1 are connected side by side in the vertical direction as shown in FIGS. 6 and 7, or are connected side by side, or are a total of four units connected in the vertical and horizontal directions as shown in FIG. That is, in any connection, the adjacent corner members 4 are connected to each other by a single connection fitting 11.

The connecting metal fitting 11 includes a metal fitting main body portion 12 that crosses below the two corner members 4 to be connected, a rising portion 13 that rises upward from both ends of the metal fitting main body portion 12, and a hook-shaped upper portion of the rising portion 13. And a fitting portion 14.
That is, the connecting metal fitting 11 is obtained by cutting out an iron plate into a band plate shape and bending, and bending at a right angle from an end portion of the metal fitting main body portion 12 to form a band plate-like rising portion 13, and a fitting portion 14. Is bent in a substantially U shape at the end of the band plate of the rising portion 13, and the lower portion of the fitting portion 14 forms a plane parallel to the upper portion of the rising portion 13.

The upper part of the fitting part 14 has an arc shape, and is fitted to the support member 7 in a substantially fitted manner without creating a large gap. The outer shape of the fitting portion 14 is sized so as to be inserted into the space having the maximum width between the groove bottom of the escape groove 16 and the column stopper member 7 in the insertion hole 6 of the corner member 4 described above.
Further, the interval between the two rising portions 13 of the connection fitting 11 is substantially equal to the interval between the relief grooves 16 of the both corner members 4, and the interval between both fitting portions 14 is the relief grooves 16 of the both corner members 4, the column stopper members 7, and the like. As shown by a two-dot chain line in FIG. 1, the two fitting portions 14 can be inserted vertically when corresponding to the maximum width space.

However, if the inner diameter of the insertion hole 6 of the corner member 4 is increased, or if the support member 7 is made thinner and the fitting portion 14 is made smaller, the inner circumference of the insertion hole 6 is not required even if the escape groove 16 is not formed. It is possible to vertically insert the fitting portion 14 into the space between the surface and the support member 7.
The connection metal fitting 11 has a height from the upper surface of the metal fitting main body portion 12 to the lower end of the fitting portion 14 slightly higher than a height from the lower end of the corner member 4 to the upper surface of the column fixing member 7. The lower end of the fitting portion 14 can move horizontally on the upper surface of the support member 7 while the upper surface of the portion 12 is in contact with the lower end of the corner member 4.

  The two fitting portions 14 are inserted to a position above the support member 7 shown by a two-dot chain line in FIG. 3 so as to correspond to the space as shown by a two-dot chain line in FIG. When horizontally moved, the two support members 7 are arranged in a V-shape, so that both the fitting portions 14 move to the position just above the support members 7 and then are lowered, then the support members 7 (Shown by solid lines in FIGS. 1 to 3).

The interval between the fitting portions 14 in the connecting metal fitting 11 is the interval between the insertion spaces in the insertion holes 6, and at the same time, from the center of the insertion hole 6 to the support member 7 at a position close to the outer corner. It is also an interval that can be fitted.
The connecting operation by the connecting metal 11 is such that two transport carts 1 are arranged vertically or side by side so that two corner members 4 are adjacent to each other with the mating surface of the transport cart 1 interposed therebetween. The member 4 is connected by the connecting metal fitting 11.

  The metal fitting body portion 12 of the connecting metal fitting 11 is disposed so as to cross below the two corner members 4 to be connected, the rising portions 13 on both sides of the metal fitting body portion 12 are inserted into the insertion holes 6 from below, and the fitting portion 14 is inserted. It passes between the insertion hole 6 and the support member 7 and lifts up above the support member 7, horizontally moves the metal fitting body 12, and abuts the rising portion 13 against the support member 7. When the rising portion 13 comes into contact with the support member 7, the fitting portion 14 moves right above the support member 7, so that when the fitting portion 14 is lowered as it is, it is engaged with the support member 7.

  When releasing the connection of the two transport carts 1, the hand is placed below the two corner members 4, the fitting body portion 12 of the connecting fitting 11 is lifted and brought into contact with the lower end of the corner member 4, and then the fitting is performed. The connecting member 11 is moved horizontally until the portion 14 rises above the support member 7 and the rising portion 13 contacts the inner peripheral surface of the insertion hole 6 or the groove bottom of the escape groove 16 in this state. When the connecting metal fitting 11 is moved horizontally, the fitting portion 14 faces the space between the insertion hole 6 and the support member 7 and the fitting portion 14 can be lowered.

The connecting metal 11 connects the two transport carts 1 by fitting both the fitting portions 14 to the both strut fixing members 7, and receives two forces when the two transport carts 1 are separated from each other. Since the stop member 7 has a V-shaped arrangement, a force that causes the fitting portion 14 to approach the outer corner portion of the corner member 4 is generated, and the connection is strengthened.
When two transport carts 1 are connected by the connecting bracket 11 and one transport cart 1 passes through a groove or a step, a relative vertical movement occurs in the adjacent corner member 4, and one support member 7 May detach from the fitting portion 14 downward. However, since it is extremely rare for the corner member 4 to move horizontally in a state where it has moved downward, horizontal disengagement between the column stopper member 7 and the fitting portion 14 is prevented, and unintentional release of the connection fitting 11 is prevented. Can be prevented.

When two transport carts 1 are connected by the connecting bracket 11, the lower part of the support column 5 is not inserted into the insertion hole 6 of the corner member 4, but the support column 5 can be inserted, and the support column 5 is formed by a pipe. In this case, the support 5 is placed on the support member 7 outside the fitting portion 14.
FIG. 9 shows a modified example of the coupling metal 11, which is formed of a round bar material. A metal body 12 is formed in the center of the round bar, and both ends of the metal body 12 are connected to each other. The rising portion 13 is formed by bending upward, and the fitting portion 14 is formed by bending the upper portion of the rising portion 13 into a substantially U shape.

In the modified fitting 11, both end portions of the fitting portion 14 are round in a plan view, so that it is easy to pass between the insertion hole 6 and the support member 7.
In addition, this invention is not limited to the said embodiment, The shape of a member, a structure, a combination, etc. can be changed.
For example, the support member 7 is inserted into the lower part of the corner member 4 so as to be parallel to the mating surfaces of the two corner members 4 to be connected, and both fitting portions 14 of the connecting metal fitting 11 are formed in parallel. After inserting both the fitting portions 14 through the space between the insertion hole 6 and the support member 7, the connecting fitting 11 is moved in a direction perpendicular to the mating surface of the corner member 4, and both fitting portions 14 are moved. You may comprise so that it may fit in the support | pillar stop member 7. FIG.

  The connection fitting 11 is made of metal, but can be made of reinforced plastic.

DESCRIPTION OF SYMBOLS 1 Carriage 3 Frame 4 Corner member 4A Cylindrical part 4B Vertical connection piece 4C Horizontal connection piece 4D Engagement rib 5 Post 6 Insertion hole 7 Post stop member 9 Wheel 11 Connection metal fitting 12 Main body part 13 Standing part 14 Fitting part 16 Escape groove

Claims (5)

An insertion hole (6) into which the lower end of the column (5) can be inserted is formed in the corner member (4) at the corner of the rectangular frame (3) in plan view, and the lower end of the column (5) is stopped at the bottom. The support | pillar stop member (7) for insertion is comprised, a conveyance trolley (1) is comprised, this conveyance trolley (1) is arranged in multiple numbers, and the adjacent corner member (4) is connected with connection metal fittings (11). A dolly connecting device,
The connecting metal fitting (11) includes a rising portion (13) inserted from below into the insertion hole (6) at both ends of the metal fitting main body portion (12) crossing below the two corner members (4) to be connected. It has a fitting part (14) fitted to a support | pillar stop member (7) from the upper part in the upper part of a standing part (13), The connection apparatus of the transport cart characterized by the above-mentioned.   The support members (7) are inserted from the outer corners of the corner members (4) on the outer side of the frame (3) to the inner corners of the inner side of the frame (3). The fitting portion (14) has an interval to be fitted to the support member (7) at a position near the outer corner from the center of the insertion hole (6) in the insertion hole (6). The transport cart connection device described in 1.   In each insertion hole (6) of the adjacent corner member (4), a relief groove (16 having a groove bottom that is further away from the center of the insertion hole (6) and closer to each other than the inner peripheral surface of the insertion hole (6). ), And the interval between the two rising portions (13) of the connection fitting (11) is substantially equal to the interval between the two escape grooves (16), and the fitting portion (14) of the connection fitting (11) is escaped. The connecting device for a transport carriage according to claim 1 or 2, characterized in that it is formed so as to be able to be inserted between a groove bottom of the groove (16) and a support member (7).   The connecting metal fitting (11) is characterized in that the rising portion (13) is formed of a strip and the fitting portion (14) is formed by bending the end of the strip into a substantially U shape. The connection apparatus of the transport trolley of any one of Claims 1-3.   The connecting bracket (11) forms a bracket body (12) in the center of the round bar, and bends both ends of the bracket body (12) upward to form a rising portion (13). The connecting device for a transport carriage according to any one of claims 1 to 3, wherein an upper portion of (13) is bent into a substantially U shape to form a fitting portion (14).

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