JP2018158650A - Carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carriage capable of facilitating connection of carriages with each other.SOLUTION: At the rear end of a carriage 10, there is provided a guide groove part 51 which gradually becomes shallower and narrower as it moves closer to a connection hole 50 from a more backward position than the connection hole 50. Only by arranging the carriages 10, 10 in the longitudinal direction and thrusting a portal connection member 40 of the rear carriage 10 into a guide groove part 51 of the front carriage 10, a short leg part 42 of the portal connection member 40 of the rear carriage 10 is guided into a connection hole 50 of the front carriage 10 for engagement, so that the carriages 10, 10 can be connected with each other. In other words, the present invention of the carriage 10 provides easier connection of the carriages 10, 10 with each other than the conventional one.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a cart that can be used by connecting a plurality thereof.

  Conventionally, as this type of cart, one leg of a connecting member having a substantially portal structure is rotatably supported at the center of the front end of the cart, and the other leg is engaged with a connecting hole at the rear center of another cart. There is known a technique for connecting carts to each other (see, for example, Patent Document 1).

Japanese Patent No. 3806251 (FIGS. 1 and 23)

  However, in the conventional cart described above, in order to connect to another cart, an operator has to take a laborious work of picking and lifting the connecting member and inserting it into the connecting hole of the other cart from above.

  This invention is made | formed in view of the said situation, and aims at provision of the trolley | bogie which can connect a trolley | bogie easily.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a support hole penetrating vertically through the center of the front end portion of the carriage and a substantially portal structure, one leg portion of which is rotatable to the support hole. And a gate-shaped connecting member that is allowed to tilt back and forth or linearly move up and down, and the other leg of the portal-shaped connecting member of another cart is engaged with the other center of the cart. A trolley having a plurality of connecting holes that can be connected side by side in the front and rear, the rear portion of the trolley is gradually shallower and gradually narrower toward the connecting hole from a rear position than the connecting hole, It is a trolley | bogie provided with the guide groove part which guides the said other leg part of the said gate-shaped connection member of the said trolley | bogie of the rear side to the said connection hole.

  A second aspect of the present invention is the carriage according to the first aspect, further comprising a turning restricting portion that holds the gate-shaped coupling member before being engaged with the coupling hole in a state of protruding forward from the carriage.

  According to a third aspect of the present invention, the turning restricting portion protrudes in a pair obliquely in front of the support hole, and the portal connecting member is disposed between the pair of turning restricting portions. The carriage according to claim 2, wherein the carriage is held in a state of projecting forward, and the portal connecting member is disposed on a rear side of the turning restricting portion and held in a lateral state.

  According to a fourth aspect of the present invention, the turning restricting portion is configured such that the turning restricting portion is slidably contacted with the portal connecting member that is turned from the rear side to the front side, and the portal connecting member is tilted or linearly moved upward. The carriage according to claim 3, wherein a guide slope is formed to guide to a position overcoming the vehicle.

  According to a fifth aspect of the present invention, the highest reaching point when the portal connecting member is in sliding contact with the inner surface of the guide groove is below the load placement surface of the carriage. It is a trolley | bogie as described in one claim.

[Inventions of Claims 1 and 5]
The rear end portion of the carriage of claim 1 is provided with a guide groove portion that gradually becomes shallower and gradually becomes narrower from the rear position to the connection hole from the connection hole. As a result, the trolleys are arranged in the front and back, and the portal connecting member of the rear cart is inserted into the guide groove of the front cart, and the portal connecting member of the rear cart is guided to the connecting hole of the front cart. The carts are engaged with each other. That is, according to the trolley | bogie of this invention, trolley | bogies can be connected easily compared with the past.

  Further, as in the cart of claim 5, if the maximum reaching point when the portal connecting member is in sliding contact with the inner surface of the guide groove is below the cargo placement surface of the cart, The carts can be connected to each other without causing interference between the load mounted on the mounting surface and the gate-shaped connecting member.

[Invention of claim 2]
In the cart according to claim 2, the gate-shaped connecting member before being engaged with the connecting hole can be held in a state of protruding forward from the cart by the turning restricting portion. Can be easily performed.

[Invention of claim 3]
In the cart according to claim 3, since the turning restricting portions protrude in a pair obliquely in front of the support hole, a gate-shaped connecting member is disposed between the pair of turning restricting portions and the front from the cart. As described above, the cart can be easily connected as it is projected. In addition, the gate-shaped connecting member can be disposed on the rear side of the turning restricting portion and held in a lateral direction so that the gate-shaped connecting member does not get in the way when the carriage is used alone.

[Invention of claim 4]
In the trolley of claim 4, the gate-shaped connecting member is moved over the turn restricting portion by the guidance of the guide slope and is projected in front of the trolley simply by turning without raising the gate-shaped connecting member.

The upper surface side perspective view of the trolley | bogie of one Embodiment of this invention. Top side perspective view of trolley Bottom perspective view of trolley Side view of trolley Enlarged perspective view of the front end of the carriage An enlarged perspective view of a partially broken front end portion of the carriage, Partially broken perspective view in the middle of connecting carts Partially broken perspective view of a state where the carts are connected to each other Side cross-sectional view in the middle of connecting trolleys Side cross-sectional view of carts connected to each other A perspective view of a state where the carriage is lifted by a forklift

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the carriage 10 of the present embodiment has a structure in which casters 20 are provided at the four corners of the lower surface of a rectangular base plate 11 that is long in the front-rear direction. In addition, it can be said that a rectangular central hole 11A that is long in the front-rear direction is formed in the central portion of the base plate 11, and the entire base plate 11 has a rectangular frame shape.

  The base 11 has a main plate wall 12 on the upper surface, and a pair of side walls 24, 24, a front wall 25 and a rear wall 26 are suspended from the outer edge of the main plate wall 12. 13 is stretched (see FIG. 3). Further, as shown in FIG. 4, the lower surface of the entire front and rear end portions of the base plate 11 are positioned below the lower surface of the entire front and rear intermediate portion. An inclined surface 11S is formed between the lower surface and the lower surface.

  As shown in FIG. 1, pedestal portions 14 are formed at four corners of the base 11 by partially bulging the main plate wall 12 downward. Each pedestal portion 14 has a rectangular shape with a long cross section in the front-rear direction, and is gradually narrowed in both the front-rear and left-right directions downward. The lower surface 14 </ b> A of the pedestal portion 14 is also covered with the lower surface rib 13. The seat plate 21 of the caster 20 is overlapped and fixed to the lower surface rib 13 below the pedestal portion 14. Each caster 20 has a structure in which a support leg 22 that rotatably supports a wheel 23 is connected to a seat plate 21 in a turnable manner.

  As shown in FIG. 1, a portion of the upper surface 12J of the main plate wall 12 (corresponding to the “cargo placement surface” of the present invention) opposite to the pedestal portion 14 is an upper surface recess 15. Reinforcing ribs 15L are formed on the bottom surface 15A of each top recess 15 so as to cross the center in the front-rear direction to the left and right. In addition, as shown in FIG. 2, drain holes 15M are formed at both ends of the bottom surface 15A in the front-rear direction.

  In the base plate 11, grip holes 16 are formed at positions on both sides of the central hole 11 </ b> A near the side walls 24. The handle hole 16 has an elongated rectangular shape extending in the front-rear direction. In addition, a part of the lower surface rib 13 described above is formed on the entire opening edge so as to surround the handle hole 16 and the center hole 11A.

  Between the center hole 11 </ b> A and each handle hole 16, a pair of non-slip portions 17, 17 are provided in the front and rear sides of the upper surface and the lower surface of the base plate 11, respectively. Specifically, the base plate 11 is provided with a plurality of cylindrical walls 13A (see FIG. 3) that hang down from the opening edge of the circular hole 12E formed in the main plate wall 12, and at both upper and lower ends of the cylindrical walls 13A. The non-slip portions 17 are configured by fitting the elastomeric bushes 17 </ b> H in a retaining state. Further, the bush 17H slightly protrudes from the upper surface 12J of the main plate wall 12, and also slightly protrudes from the lower surface of the lower surface rib 13 (see FIG. 4). Then, the load on the upper surface 12J is prevented from slipping by the non-slip portion 17, and when the carriage 10 is lifted by the fork 95 of the forklift as shown in FIG. It is slippery.

  In the present embodiment, the pair of bushes 17H and 17H are fitted to the upper and lower ends of the cylindrical wall 13A to form the pair of non-slip portions 17 and 17. However, the cylindrical wall 13A has one pair. A pair of non-slip portions 17, 17 may be configured by fitting a long and thin bush and projecting both ends thereof from the cylindrical wall 13A.

  A pair of upper surface protrusions 18 and 18 are formed on the upper surface of the base plate 11 so as to continuously extend over the entire side edge portions and the entire front edge portion excluding the central portion. These upper surface protrusions 18 protrude upward from the main plate wall 12 in a stepped shape. An intermediate step surface 18 </ b> A is formed on the inner surface of a portion of the upper surface protrusion 18 corresponding to both side edges of the base plate 11.

  The outer surface of the upper surface protrusion 18 is flush with the outer surfaces of the side wall 24 and the front wall 25 of the base plate 11. In addition, an information display surface 24 </ b> D on which a label is attached or printing is performed is formed on the side portion of the base 11 so as to straddle the side wall 24 and the outer surface of the upper surface protrusion 18. ing. As shown in FIG. 4, the information display surface 24 </ b> D has a rectangular shape that fits between the inclined surfaces 11 </ b> S and 11 </ b> S of the base plate 11. Further, as shown in FIG. 7, a chamfered rear slope 26 </ b> A is formed at the corner between the main plate wall 12 and the rear wall 26, and the rear slope 26 </ b> A continues to the rear end of the upper surface protrusion 18. ing.

  As shown in FIG. 1, a front concave portion 27 is formed at a front end portion of the base plate 11 by stepping a central portion in the lateral direction to a rear side in a stepped shape, and forward from a lower end portion of a rear surface of the front concave portion 27. A front protrusion 28 protrudes from the front. As shown in FIG. 2, the front protrusion 28 has a smaller width than the front recess 27, and as shown in FIG. 4, the front surface of the front protrusion 28 is the outer surface of the front walls 25, 25 on both sides thereof. It is almost the same. Further, as shown in FIG. 5, the upper surface of the front protrusion 28 is disposed near the lower end of the front wall 25, and the lower surface of the front protrusion 28 is positioned below the entire lower surface of the front part of the base plate 11. ing. As shown in FIG. 3, the plurality of ribs 28 </ b> L constituting the lower portion of the front protrusion 28 continuously extend to the front portion of the base 11.

  Further, as shown in FIG. 1, storage recesses 29 communicating with the front recesses 27 are formed at the ends of the pair of front walls 25, 25. The upper surface of each storage recess 29 is positioned above the upper surface of the front projection 28, and the distal end portion of the gate-shaped connecting member 40 described later is stored in the storage recess 29.

  As shown in FIG. 6, a support hole 30 penetrates in the vertical direction at the center in the horizontal direction of the front projection 28, and a portal connecting member 40 is attached thereto. The gate-shaped connecting member 40 is made of, for example, a metal round bar, and has a substantially gate-shaped structure in which the long leg portion 41 and the short leg portion 42 are bent at right angles downward from both ends of the connection bar 43. . Further, the long leg portion 41 has a length penetrating the support hole 30, and the short leg portion 42 has a length approximately half of the long leg portion 41. Further, the communication bar 43 is not less than 1/2 of the lateral width of the front projection 28 and is two to three times as long as the long leg portion 41.

  A screw is formed at the lower end of the long leg portion 41. Then, the long leg portion 41 penetrates the support hole 30, and the nut N is screwed to the lower end portion thereof, for example, brazed, so that the long leg portion 41 is rotatably supported by the support hole 30 and is removed. It has been stopped. The outer edge of the tip of the short leg 42 is chamfered.

  The support hole 30 has a substantially circular lower end, and the other than the lower end has an oval shape that is long in the front-rear direction, whereby the portal connecting member 40 can tilt in the front-rear direction. Specifically, as shown in FIG. 7, the front side portion of the support hole 30 is a front end arc surface 30 </ b> A that extends in a substantially vertical direction and has a semicircular cross section. On the other hand, the rear portion of the support hole 30 has a semicircular rear end inclined circular arc surface 30B that is inclined rearward from the lower end to the upper end position, and is substantially from the upper end position to the upper end. The rear end circular arc surface 30C is a semicircular cross section extending in the vertical direction. Further, the front end arc surface 30A, the rear end inclined arc surface 30B, and the rear end arc surface 30C have the same curvature radius, and the curvature radius is larger than the curvature radius of the cross section of the portal connecting member 40. Further, both side portions of the front end arc surface 30A are connected to both side portions of the rear end inclined arc surface 30B and the rear end arc surface 30C by parallel inner surfaces 30D and 30D. Then, when the connecting bar 43 is projected forward from the support hole 30, the portal connecting member 40 is supported by the long leg 41 as shown in FIG. 8 due to the weight of the connecting bar 43 and the short leg 42. The contact bar 43 is pressed against the arcuate surface 30A of the front end of the hole 30 and is held in a “front horizontal posture” in which the connection bar 43 is substantially horizontal. Further, when an external force that lifts the short leg portion 42 is received in this state, the long leg portion 41 abuts or approaches the rear end inclined circular arc surface 30B or the rear end circular arc surface 30C as shown in FIG. Tilt to position.

  Moreover, as shown in FIG. 6, lower end side inclined surfaces 30E and 30E that are expanded downward are formed at the lower ends of the inner side surfaces 30D and 30D. Furthermore, as shown in FIG. 9, a lower end front side inclined surface 30 </ b> F is formed at the lower end portion of the front end arc surface 30 </ b> A so as to be inclined forward and downward.

  As shown in FIG. 5, a pair of upper surface grooves 31, 31 extending from the support hole 30 in both the left and right directions are formed on the upper surface of the front protrusion 28. The bottom surface of the upper surface groove 31 is inclined so as to descend as the distance from the support hole 30 increases. Accordingly, as shown in FIG. 6, when the gate-shaped connecting member 40 is in a state in which the connection bar 43 is extended laterally from the support hole 30, the connection bar 43 is inclined due to the weight of the connection bar 43 and the short leg portion 42. Then, the abutting contact with the inner surface of the upper surface groove 31 is maintained, and the gate-shaped connecting member 40 is held in the “lateral tip downward posture”. At this time, the distal end portion of the portal connecting member 40 including the short leg portion 42 is received in the storage recess 29.

  As shown in FIG. 5, the inner surfaces of the upper surface groove 31 are inclined so as to be separated from each other upward. The front inner surface of the upper surface groove 31 is inclined at a larger angle with respect to the vertical direction than the rear inner surface. The front portion of the front protrusion 28 from the upper surface groove 31 forms a pair of turning restricting portions 32 and 32 according to the present invention, and the inner side surface at the front side of the upper surface groove 31 is the guide slope 32A according to the present invention. (Hereinafter referred to as “first guide slope 32A”).

  Opposing protrusions 33, 33 protrude upward from the end portions of the pair of turning restricting portions 32, 32 that are close to each other, and a shaft receiving portion 34 is formed between the opposing protruding portions 33, 33. Each of the opposing protrusions 33 has a trapezoidal shape when viewed from the front, and has a substantially vertical positioning side surface 33B on the shaft receiving portion 34 side, and a book that is gently inclined with respect to the horizontal direction on the opposite side. A guide slope 33A according to the invention (hereinafter referred to as “second guide slope 33A”) is provided. In addition, the upper surface 33C of the opposing protrusion 33 is horizontal. Further, a first guide slope 32 </ b> A is continuously formed from the bottom of the turning restricting portion 32 to the upper surface 33 </ b> C of the opposing protruding portion 33 on the entire rear portion of the facing protruding portion 33. As a result, the connecting bar 43 is brought into sliding contact with the first and second guide slopes 32A and 33A simply by rotating the portal connecting member 40 forward from the “horizontal tip downward posture” received in the upper surface groove 31. It gets over the turning restricting portion 32 including the opposing protrusion 33 and is accommodated in the shaft receiving portion 34.

  The lateral width of the shaft receiving portion 34 (that is, the distance between the opposing protrusions 33, 33) is slightly larger than the diameter of the connecting bar 43, and the depth of the shaft receiving portion 34 is substantially the same as the diameter of the connecting bar 43. ing. As shown in FIG. 10, the bottom surface of the shaft receiving portion 34 is positioned slightly above the bottom surface of the upper surface groove 31 where the upper end portion of the support hole 30 is open. As a result, when the gate-shaped connecting member 40 is accommodated in the shaft receiving portion 34, the gap between the nut N and the lower end opening edge of the support hole 30 becomes small, and the connecting bar 43 of the gate-shaped connecting member 40 becomes the carriage 10. It is held in a “forward-facing horizontal posture” extending horizontally in front of the.

  As shown in FIG. 2, a connection hole 50 and a guide groove 51 are formed in the center of the rear part of the base plate 11. The connecting hole 50 is an isosceles triangle having a sharp planar shape, and is tapered toward the rear. Further, the connecting hole 50 penetrates the entire base plate 11 up and down and is covered with the lower surface rib 13 on the side. Further, the rear end portion of the connection hole 50 is located in front of the rear slope 26A of the rear wall 26, and the front end of the connection hole 50 is located in the vicinity of the central hole 11A. Also, as shown in FIG. 10, the distance L1 from the rear end surface of the base plate 11 (that is, the outer surface of the rear wall 26) to the inner surface of the front end of the connection hole 50 is the above-described portal connection in the forward horizontal posture. The amount of protrusion of the front end surface of the base plate 11 in the member 40 (that is, the outer surface of the front wall 25) is larger.

  As shown in FIG. 2, the guide groove 51 is located on the rear side of the connection hole 50, has a planar shape of an isosceles triangle having an acute angle or a right angle, and is tapered from the rear end surface of the base 11 toward the front. Yes. And the apex angle part of the guide groove part 51 and the apex angle part of the connection hole 50 have overlapped.

  Specifically, as shown in FIG. 9, between the guide portion 50K where the lateral width is the narrowest at the overlapping portion with the connecting hole 50 in the guide groove portion 51, to a position slightly away from the rear portion, A groove bottom top surface 51 </ b> C is formed that is positioned at substantially the same height as the bottom surface of the shaft receiving portion 34 described above. The bottom surface 51A of the guide groove 51 is a flat surface inclined upward from the position near the lower end of the rear end surface of the base plate 11 (the outer surface of the rear wall 26) toward the rear end edge of the groove bottom top surface 51C. Is formed.

  As shown in FIG. 10, the lower end portion of the bottom surface 51 </ b> A is located further below the lower end portion of the short leg portion 42 when the portal connecting member 40 is in the forward horizontal posture described above. Further, as shown in FIG. 2, the inner side surfaces 51 </ b> B and 51 </ b> B of the guide groove portion 51 form a flat surface parallel to the vertical direction and are inclined with respect to the front-rear direction so as to gradually approach each other toward the connection hole 50. doing. Furthermore, as shown in FIG. 9, the distance L <b> 2 from the groove bottom top surface 51 </ b> C to the top surface 12 </ b> J of the main plate wall 12 is larger than the length of the short legs 42.

  As shown in FIG. 2, the inner side surface of the rear end of the connection hole 50 is a semicircular rear end arc surface 50A that bulges rearward. The upper end portion of the rear end arc surface 50A is open to the groove bottom top surface 51C. Further, the lateral width of the rear end arc surface 50A is larger than the diameter of the portal connecting member 40, and is the same as the lateral width of the front end arc surface 30A (see FIG. 9) of the support hole 30 described above. Further, the lateral width of the barrier portion 50K (see FIG. 2) is slightly larger than the lateral width of the rear end arcuate surface 50A. As shown in FIG. 3, the lower surface rib 13 on the lower side of the guide groove 51 corresponds to the arc-shaped rib 13E that forms the rear end arc surface 50A and the planar shape of the guide groove 51 from the arc-shaped rib 13E. And radial ribs 13F extending radially.

  This is the end of the description of the configuration of the carriage 10 of this embodiment. Next, the effect of this cart 10 will be described. When the cart 10 is used alone, as shown in FIG. 1, the portal connecting member 40 is accommodated in the upper surface groove 31 facing sideways. As a result, the gate-shaped connecting member 40 is compactly accommodated at a position behind the front end surface of the base plate 11 and does not get in the way.

  Since the cart 10 of the present embodiment has a frame structure having the central hole 11A, it is preferable that the cargo to be transported is a box shape. FIG. 9 shows a container 90 as an example of a box-shaped package. When the container 90 is mounted on the cart 10, lateral slippage can be suppressed by the non-slip portion 17 (see FIG. 1) and the upper surface protrusion 18. Thereby, even if the containers 90 are stacked on the carriage 10 in a plurality of stages, stable conveyance is possible, and many containers 90 can be efficiently conveyed.

  If a plurality of carts 10 are connected, more containers 90 can be efficiently conveyed. For this purpose, as shown in FIG. 6, the gate-shaped connecting member 40 housed in the upper surface groove 31 is turned forward to project forward of the carriage 10 as shown in FIG. 5. Specifically, it is only necessary to put a hand or a foot into the storage recess 29 (see FIG. 1) on the front surface of the carriage 10 and pull the short leg portion 42 toward you. Then, even if the portal connecting member 40 is not lifted up, the connecting bar 43 of the portal connecting member 40 is moved to the top of the turning restricting portion 32 by the guidance of the first and second guide slopes 32A and 33A. When the vehicle rides on the portion (specifically, the upper surface 33C of the opposing projection 33) and further turns from there, the communication bar 43 enters the shaft receiving portion 34 as shown in FIG. As a result, the portal connecting member 40 is restricted from turning in the lateral direction and is held in a forward horizontal posture protruding forward from the carriage 10.

  Then, the carts 10 are arranged on the rear side of the other carts 10, and the portal connecting member 40 of the rear cart 10 is inserted into the guide groove portion 51 of the front cart 10. At this time, if the distal end portion of the portal connecting member 40 is shifted laterally from the previous connecting hole 50 of the guide groove portion 51, the side surface of the short leg portion 42 of the portal connecting member 40 is the inner side surface 51 </ b> B of the guide groove portion 51. In contact with the connecting hole 50 side. Further, as the portal connecting member 40 advances forward in the guide groove portion 51, the lower end portion of the short leg portion 42 slides on the bottom surface 51A of the guide groove portion 51 and moves upward, and the portal connecting member 40 moves upward. Tilt. Then, the lower end portion of the short leg portion 42 rides on the groove bottom top surface 51 </ b> C of the guide groove portion 51.

  Here, since the space more than the length of the short leg part 42 is ensured between the groove bottom top surface 51C and the upper surface 12J of the main board wall 12, the short leg part 42 is the container 90 on the main board wall 12. It moves on the groove bottom top surface 51 </ b> C without interfering with and moves above the connection hole 50. Then, the short leg portion 42 is engaged with the connection hole 50 by its own weight, and the connecting bar 43 is supported by the groove bottom top surface 51C from below, so that the gate connection member 40 returns to the forward horizontal posture. . As described above, the front and rear carts 10 are connected by the portal connecting member 40. Moreover, the same operation can be performed and the 3 or more several trolley | bogie 10 can also be connected.

  Thus, according to the trolley | bogie 10 of this embodiment, the trolley | bogies 10 and 10 can be connected easily compared with the past. Moreover, the carts 10 and 10 can be connected to each other without causing the baggage and the portal connecting member 40 to interfere with each other even when the cargo such as the container 90 is loaded on the cart 10. Further, the front and rear carriages 10 and 10 can be turned relatively around the short leg portion 42 of the portal connecting member 40 that connects them. Thereby, the bogie train formed by connecting a plurality of bogies 10 can be curved as a whole and smoothly turn around the corner portion. In addition, when the carriages 10 and 10 are brought closer to each other, as shown in FIG. 10, the portal connecting member 40 of the rear carriage 10 enters the inner part of the front connection hole 50 and the front and rear carriages 10 and 10 are moved to each other. Since it can approach until it mutually contacts, a bogie train can be packed together compactly when not in use.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) In the cart 10 of the above embodiment, the turning of the portal connecting member 40 in the forward horizontal posture is restricted by the pair of turning restriction portions 32, 32, but the turning restriction portions 32, 32 are not provided. The gate-shaped connecting member 40 may freely rotate.

(2) Instead of the pair of turning restricting portions 32, 32, a groove extending in the front-rear direction is provided in front of the support hole 30 so that the communication bar 43 of the gate-shaped connecting member 40 is accommodated therein. Good.

(3) The bottom surface 51A of the guide groove 51 of the carriage 10 of the embodiment may be conical and the both side portions may be continuous with the inner side surfaces 51B and 51B.

(4) The cart 10 of the above embodiment has a structure in which the gate-shaped connecting member 40 tilts forward and backward to engage with the connecting hole 50, but the portal-shaped connecting member 40 moves vertically up and down to connect the connecting hole 50. You may make it engage with.

(5) Although the connection hole 50 of the carriage 10 of the above embodiment penetrates in the vertical direction, it may have a concave structure having a bottom portion without penetrating vertically.

10 trolley 12J top surface (loading surface)
Reference Signs List 30 support hole 32 turning restricting portion 32A first guide slope 33A second guide slope 40 portal connection member 50 connection hole 51 guide groove

Claims (5)

A support hole penetrating up and down the center of the front end of the carriage,
A gate-shaped coupling member having a substantially gate-shaped structure, one leg of which is rotatably supported by the support hole, and which is allowed to tilt back and forth or vertically move up and down;
In the cart that is formed at the center of the rear portion of the carriage and has a connection hole with which the other leg portion of the portal connecting member of another carriage is engaged, and can be connected side by side in a plurality.
In the rear part of the carriage, the other leg part of the portal connecting member of the carriage on the rear side is gradually shallower and gradually narrowed from the rear side to the connecting hole from the connecting hole. A cart provided with a guide groove for guiding the connection hole.   The cart according to claim 1, further comprising a turning restricting portion that holds the gate-shaped coupling member before being engaged with the coupling hole in a state of protruding forward from the cart. The swivel restricting portions are provided in a pair so as to protrude diagonally forward of the support hole,
The portal connecting member is disposed between the pair of turning restricting portions and is held in a state of protruding forward from the carriage, and the portal connecting member is disposed on the rear side of the turning restricting portion, The cart according to claim 2 held in a state.   A guide that guides the swivel restricting portion to a position over the swivel restricting portion by slidingly contacting the portal connecting member swiveled from the rear side to the front side and tilting or linearly moving the portal connecting member upward. The trolley | bogie of Claim 3 in which the slope is formed. 5. The maximum arrival point when the portal connecting member is in sliding contact with the inner surface of the guide groove portion is lower than the luggage placement surface of the carriage. Trolley.

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