JP2016068852A - Carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carriage in which a seat plate of a caster can be easily attached and fixed to a synthetic resin base, and which can cope with downsizing and weight saving of the base.SOLUTION: A carriage 1 comprises a synthetic resin base 10 and a plurality of casters 50. Seat plate reception parts 20 for accommodating base plates 51 of the casters 50 and retainer reception parts 30 are formed on an undersurface at four corners of the base 10. The retainer reception part 30 is adjacent to the seat plate reception part 20 in a horizontal direction on a seat plate insertion port 21 side of the seat plate reception part. One end side of a retainer member 40 is held by a rotation holding part 31 so as to be rotatable in a direction perpendicular to the base 10. The other end side of the retainer member 40 is locked by a retainer locking part 35 when the retainer member is accommodated in the retainer reception part 30. When the retainer member 40 is fixed in the retainer reception part 30 by the rotation holding part 31 and the retainer locking part 35, one side face of the retainer member 40 is fixed at a position adjacent to the seat plate insertion port 21.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a carriage having a base made of synthetic resin and a plurality of casters attached to the base.

  Conventionally, a cart is configured by attaching casters to predetermined positions on a base plate made of synthetic resin (for example, a corner portion of a base plate having a square shape), and a target article is placed on the base plate. It is used for transportation work. In these carts, various methods such as a method of fixing the caster seat plate to the base plate with a fastener such as a bolt are used as a method of mounting and fixing the caster to the base plate. Various inventions have been made as a method of attaching casters to a base without using the.

For example, Patent Document 1 describes an invention relating to a cart that can be attached to a caster without using a fastener such as a bolt. In the cart described in Patent Literature 1, when the seat plate of the caster is inserted into the slide receiving portion where the side surface side of the base plate is opened, the lock arm is configured to slide in contact with the seat plate and elastically deform upward. Has been. When the seat plate reaches the back of the slide receiving portion, the lock arm is elastically restored, so that the lock projection formed at the tip of the lock arm locks the edge of the seat plate.
Furthermore, in the cart described in Patent Document 1, the retainer is inserted into a space located above the seat plate and the lock arm in the slide receiving portion in a state where the seat plate has reached the back of the slide receiving portion. . Since the elastic deformation of the lock arm is restricted by the retainer, the seat plate of the caster can be mounted and fixed at a predetermined position on the base plate without using a fastener such as a bolt.

JP 2006-062429 A

  Here, in recent years, from the viewpoint of improving the storage efficiency of the carriage and the work efficiency during transportation work, it is desired to reduce the size and weight of the carriage itself. In responding to the downsizing and weight reduction of the cart, it is very important to reduce the size and weight of the base plate constituting the main part of the cart.

  In this respect, in the cart described in Patent Document 1, as described above, when the seat plate of the caster is attached to the slide receiving portion, the lock arm must be elastically deformed upward. In other words, in the case of the configuration described in Patent Document 1, the space in which the seat plate locked by the lock arm is disposed and the space allowing the elastic deformation of the lock arm must be adjacent to each other in the vertical direction. Therefore, in the configuration described in Patent Document 1, the height dimension of the base plate (that is, the thickness of the base plate) is inevitably limited by the configuration of the slide receiving portion, and the size and weight of the base plate are hindered. . Furthermore, since the size and weight of the base plate are hindered, the size and weight of the cart itself are also prevented.

  Furthermore, in the cart described in Patent Document 1, the elastic deformation of the lock arm is regulated by inserting the retainer into the space above the lock arm and caster seat plate, and the lock arm and caster seat plate are fixed. ing. That is, in the case of Patent Document 1, a space in which the retainer can be inserted must be formed above a space where the seat plate locked by the lock arm is disposed. Here, the retainer must regulate the elastic deformation of the lock arm and requires a certain degree of rigidity, which leads to an increase in size. Then, the space located above the lock arm and the seat plate in the slide receiving portion inevitably increases with the size of the retainer, and the height dimension of the base plate inevitably depends on the configuration of the slide receiving portion. Due to restrictions, miniaturization and weight reduction of the base plate are hindered. Furthermore, since the size and weight of the base plate are hindered, the size and weight of the cart itself are also prevented.

  In the case of the configuration described in Patent Document 1, a structure in which the seat plate of the caster is locked using elastic deformation of the lock arm and a structure in which a retainer is inserted to restrict elastic deformation of the lock arm in the slide receiving portion. Since it needs to be formed, the structure in the slide receiving portion is complicated. Accordingly, the amount of the synthetic resin required for forming the base plate is increased, and the mold for molding is complicated, so that the production costs of the base plate and the cart are increased. Further, in this configuration, since the base and the retainer are formed separately, there is a possibility that the removed retainer may be lost.

  The present invention provides a cart that can easily mount and fix a seat plate of a caster on a base plate made of synthetic resin, and can cope with a reduction in size and weight of the base plate.

  The cart according to claim 1 is a cart having a base made of synthetic resin and a plurality of casters attached to a lower surface of the base, and the base has a seat plate of the caster. A seat plate receiving portion that is accommodated in a state along the lower surface of the base plate, and a seat plate of the caster that is adjacent to the seat plate receiving portion in a horizontal direction and is directed to an attachment position in the seat plate receiving portion. And a retainer receiving portion that accommodates a retainer member that fixes the seat plate of the caster in the seat plate receiving portion, and the retainer receiving portion is located with respect to the retainer receiving portion. A rotation mechanism that rotatably supports one end side of the retainer member as an axis, and the retainer member is rotated in a direction perpendicular to the lower surface of the base plate and is accommodated in the retainer receiving portion. The retainer part It characterized in that it has a locking mechanism for locking and a.

  The cart according to claim 2 is the cart according to claim 1, wherein the rotation mechanism unit is configured to move the seat plate of the caster toward a mounting position in the seat plate receiving unit. It is characterized by being formed outside in the horizontal direction.

  Moreover, the cart according to claim 3 is the cart according to claim 1 or claim 2, wherein the retainer member is accommodated in the retainer receiving portion and locked by the locking mechanism portion. And an operation portion protruding downward from the seat plate receiving portion.

  A cart according to a fourth aspect is the cart according to any one of the first to third aspects, wherein the turning mechanism portion and the locking mechanism portion are arranged in the retainer receiving portion in the base plate. It is formed in the position spaced apart from the top plate which comprises the upper surface of this by predetermined distance.

  Moreover, the cart according to claim 5 is the cart according to any one of claims 1 to 4, wherein the retainer member is interposed through the rotating mechanism portion formed in the retainer receiving portion. It is integrally attached to the base plate.

  The cart according to claim 1 has a base plate made of synthetic resin and a plurality of casters attached to the lower surface of the base plate, and carries the work by loading articles on the base plate. Can be used. In the bogie, a seat plate receiving portion and a retainer receiving portion are formed on the lower surface of the base plate, and the retainer receiving portion is disposed at a position adjacent to the seat plate receiving portion in the horizontal direction. Yes. Therefore, according to the cart, since the retainer receiving portion and the seat plate receiving portion are formed adjacent to each other in the horizontal direction, it is possible to cope with the downsizing and weight reduction of the base plate in the vertical direction. As a result, the cart can cope with the miniaturization and weight reduction of the cart itself by responding to the miniaturization and weight reduction of the base plate constituting the main part of the cart.

  Further, in the carriage, the retainer receiving portion is configured to include a rotation mechanism portion and a locking mechanism portion, and the rotation mechanism portion is one end of the retainer member with respect to the retainer receiving portion. It is supported so as to be rotatable about the side. Therefore, when the retainer member is rotated and accommodated in the retainer receiving portion, the retainer member is positioned upstream in the movement direction of the seat plate of the caster toward the mounting position in the seat plate receiving portion. The seat plate of the caster is accommodated in a state along the lower surface of the base by the seat plate receiving portion, and the retainer member is located upstream in the movement direction of the seat plate of the caster. Is fixedly mounted at a mounting position in the seat plate receiving portion. According to the cart, the seat plate of the caster can be easily attached and fixed in the seat plate receiving portion by a simple operation of rotating the retainer member in the retainer receiving portion.

  And a latching mechanism part latches the said retainer member, when rotating a retainer member and accommodating in a retainer receiving part. One end side of the retainer member is rotatably held by a rotation mechanism portion, and movement in a direction perpendicular to the lower surface of the base plate is restricted. That is, when the retainer member is housed in the retainer receiving portion, the movement in the direction perpendicular to the lower surface of the platform is restricted as a whole by the cooperation of the rotation mechanism portion and the locking mechanism portion. . Thereby, according to the said cart, since the position of the retainer member in the retainer receiving portion can be fixed by the rotation mechanism portion and the locking mechanism portion, the seat plate of the caster is positioned at the mounting position in the seat plate receiving portion. Can be maintained.

  3. The cart according to claim 2, wherein the rotation mechanism portion is formed on the outer side in the horizontal direction with respect to a movement path of the seat plate of the caster toward the mounting position in the seat plate receiving portion, One end side of the retainer member is supported at a position that is on the outer side in the horizontal direction with respect to the movement path of the plate. Therefore, according to the cart, by rotating the retainer member, it is possible to reliably move the caster from the moving path of the seat plate, so that the caster seat plate can be easily moved to the mounting position in the seat plate receiving portion. Can be arranged.

  4. The carriage according to claim 3, wherein the retainer member has an operation portion, and the operation portion is accommodated in the retainer receiving portion and locked by the locking mechanism portion. It protrudes downward from the part. Therefore, even when the retainer member is accommodated in the retainer receiving portion, the operation portion can be grasped. Therefore, according to the cart, the operation relating to the engagement / disengagement with respect to the retainer member and the rotation of the retainer member are possible. The operation can be easily performed.

  5. The cart according to claim 4, wherein the rotation mechanism portion and the locking mechanism portion are formed at a position spaced apart from the top plate constituting the upper surface of the base plate by a predetermined distance in the retainer receiving portion. ing. Therefore, according to the cart, even when the base plate is deformed due to a load caused by a load placed on the upper surface of the base plate, the flexure deformation is caused by the rotation mechanism portion and the engagement. The influence on the stopping mechanism can be reduced, and the retainer member can be held and locked.

  In the cart according to claim 5, since the retainer member is integrally attached to the base plate via the rotation mechanism portion formed in the retainer receiving portion, the caster replacement work is performed. When carrying out, it is possible to prevent the retainer member from being lost.

It is an external appearance perspective view of the trolley concerning this embodiment. It is an appearance perspective view showing the state where a plurality of carts concerning this embodiment were piled up. It is an external appearance perspective view which shows the structure of the lower surface of the base board which concerns on this embodiment. It is an external appearance perspective view of the caster concerning this embodiment. It is an enlarged view which shows the structure of a seat board receiving part and a retainer receiving part. It is sectional drawing which shows the structure of a seat board receiving part and a retainer receiving part. It is an external appearance perspective view (1) of the retainer member concerning this embodiment. It is an external appearance perspective view (2) of the retainer member concerning this embodiment. It is a perspective view which shows the state which has arrange | positioned the caster in the seat board receiving part. It is a perspective view which shows the state which has arrange | positioned the retainer member in a retainer receiving part. It is explanatory drawing which shows the attachment fixed state of the caster by a retainer member.

Hereinafter, a cart according to the present invention will be described in detail based on an embodiment applied to a cart 1 with reference to the drawings.
In the following description, the vertical direction of the carriage 1 and each component is defined with reference to the carriage 1 in a state where it can be used for transportation work in a workplace such as a factory. And the trolley | bogie 1 has the base 10 as main components, and the planar shape of the base 10 has comprised the substantially rectangular shape. As shown in FIG. 1 and the like, the front-rear direction of the carriage 1 and each component in the present embodiment is defined as a direction toward the short side of the platform 10 having a substantially rectangular shape, and the left-right direction of the carriage 1 and each component is The direction toward the long side of the base plate 10 is defined.

(Schematic structure of the bogie)
First, a schematic configuration of the carriage 1 according to the present embodiment will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the cart 1 according to the present embodiment is configured by attaching and fixing a plurality of casters 50 to the lower surface of a base plate 10 made of synthetic resin. It is used when placing and transporting on the platform 10. In the cart 1, casters 50 are attached to the four corners of the base 10 having a substantially rectangular plane shape, and are fixed so as not to move easily.

  And in the said trolley | bogie 1, the wheel receiving part 15 is each formed in the top plate wall 11 which comprises the upper surface of the base plate 10 in the position corresponding to the four corners of the base plate 10 so that the top plate wall 11 may be depressed below. . As shown in FIG. 2, when a plurality of carriages 1 are stacked, the wheels 53 of the casters 50 relating to the carriage 1 located above the carriages 15 relating to the lower carriage 1 are positioned. Therefore, the wheel receiving unit 15 performs a function of retaining the wheels 53 of the casters 50 in the cart 1 placed on the upper side in the wheel receiving unit 15, respectively, so that the cart 1 placed on the upper side is moved downward. Maintain just above the carriage 1.

(Configuration of base plate)
Next, the base 10 constituting the cart 1 according to the present embodiment will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, the base plate 10 is an injection-molded product of synthetic resin, and is configured such that the planar shape is a rectangle, the top plate wall 11, the end frame wall 12, A side frame wall 13 and reinforcing ribs 14 are provided.

  The top plate wall 11 is formed in a substantially rectangular plate shape on the upper surface of the platform 10, and constitutes a placement surface on which a load on the cart 1 is placed. The end frame walls 12 hang downward from the outer edge portions of the top plate wall 11 at both ends in the front-rear direction (that is, short side portions). The side frame walls 13 hang downward from the outer edge portions of the top plate wall 11 at both ends in the left-right direction (that is, long side portions). As shown in FIG. 3, reinforcing ribs 14 are stretched around the lower surface of the top plate wall 11 in a lattice shape, and are erected vertically to the lower surface of the top plate wall 11.

  As shown in FIGS. 1 to 3, wheel receiving portions 15 are respectively arranged at the four corners of the top plate wall 11, and the wheel receiving portions 15 are depressed in a circular area in a corner portion of the top plate wall 11. Is formed. A seat plate receiving portion 20 and a retainer receiving portion 30 to which the seat plate 51 of the caster 50 is attached are formed below the wheel receiving portion 15 (see FIG. 3). Therefore, as shown in FIG. 2, when a plurality of carriages 1 are stacked, the wheels 53 of the carriage 1 placed on the upper side are arranged in the wheel receiver 15 in the lower carriage 1.

  A plurality of regulating ribs 16 are formed in the wheel receiving portion 15 so as to extend radially. Therefore, when a plurality of carriages 1 are stacked, the wheel 53 of the carriage 1 placed on the upper side is disposed in a region where the wheel receiving portion 15 of the lower carriage 1 is divided by the restriction ribs 16. Is maintained in the region. Thereby, according to the said trolley | bogie 1, with the cooperation of the wheel receiving part 15 and the control rib 16, the other trolley | bogie 1 can be piled up on the one trolley | bogie 1 substantially, and the storage efficiency of the trolley | bogie 1 is improved. be able to.

(Caster configuration)
Then, the structure of the caster 50 of the trolley | bogie 1 which concerns on this embodiment is demonstrated in detail, referring FIG. As described above, the casters 50 are attached and fixed by the seat plate receiving portions 20 and the retainer receiving portions 30 formed at the four corners of the base 10. The caster 50 is a component that is distributed as a general-purpose component, and includes a seat plate 51, a wheel support leg 52, and a wheel 53.

  The caster 50 has a structure in which a wheel support leg 52 is rotatably connected to the center of the lower surface of the seat plate 51, and the wheel 53 is rotatably held by the wheel support leg 52. The seat plate 51 is, for example, a plate-like member having a rectangular planar shape, and is a member for attaching and fixing the casters 50 to the base plate 10. The rotation axis of the wheel 53 is deviated from the pivot axis of the wheel support leg 52 with respect to the seat plate 51. Thereby, the wheel support leg 52 freely turns according to the traveling direction of the carriage 1.

  In the present embodiment, the caster 50 has a configuration in which the wheel support legs 52 are pivotably attached to the seat plate 51, but the present invention is not limited to this mode. That is, the caster 50 can use a configuration in which the wheel support legs 52 are fixed to the seat plate 51 in a predetermined direction.

(Configuration of seat plate receiving part and retainer receiving part)
Next, specific configurations of the seat plate receiving portion 20 and the retainer receiving portion 30 in the present embodiment will be described in detail with reference to FIGS. 5 and 6. As shown in FIG. 3, the seat plate receiving portion 20 and the retainer receiving portion 30 are formed at the four corners of the bottom surface of the base plate 10 and have basically the same configuration. Therefore, in the following description, the seat plate receiving portion 20 and the retainer receiving portion 30 positioned on the right front side of the base plate 10 will be described as an example.

  First, the configuration of the seat plate receiving portion 20 will be described. The seat plate receiving portion 20 is formed on the lower surface of the wheel receiving portion 15 in the top plate wall 11 (see FIG. 3), and is configured so that the seat plate 51 of the caster 50 can be accommodated. Therefore, the upper portion of the seat plate receiving portion 20 is closed by the top plate wall 11 constituting the wheel receiving portion 15.

  The seat plate receiving portion 20 is closed at both sides in the front-rear direction by side ribs 22 hanging from the top plate wall 11, and further, the back portion (left-right direction) by the back ribs 23 hanging from the top plate wall 11. Inward direction) is closed. The inner rib 23 is connected perpendicularly to the end of the side rib 22. The seat plate receiving portion 20 is partitioned by the side ribs 22 and the back ribs 23, and is partitioned by a size corresponding to the seat plate 51 in the present embodiment.

  As shown in FIG. 5 and FIG. 6, the seat plate receiving portion 20 includes a seat plate insertion opening 21 at an end face on the outer side (in this case, the right side) of the base plate 10 in the left-right direction. The insertion port 21 has a height dimension and a width dimension corresponding to the plate thickness of the seat plate 51. Therefore, the seat plate 51 of the caster 50 is inserted into the seat plate receiving portion 20 through the seat plate insertion port 21. A reinforcing rib 14 extends in a grid shape on the upper surface (the lower surface of the top plate wall 11) in the seat plate receiving portion 20, and the end surface of the reinforcing rib 14 is flush with the upper end edge of the seat plate insertion port 21. It is formed to become.

  A lower support portion 24 is formed at each lower end edge of the pair of side ribs 22 in the seat plate receiving portion 20. Each of the lower support portions 24 protrudes from the lower end edge of the side rib 22 in the horizontal direction so as to approach each other. Each lower support portion 24 extends from the seat plate insertion opening 21 of the seat plate receiving portion 20 to the back rib 23 and is connected to the lower end of the back rib 23. Further, the upper surface of the lower support portion 24 is opposed to the lower surface of the top plate wall 11 constituting the inside of the seat plate receiving portion 20 (specifically, the lower end surface of the reinforcing rib 14 in the seat plate receiving portion 20). The dimensions corresponding to the plate thickness are separated. Therefore, when the seat plate 51 is inserted into the seat plate receiving portion 20, both end portions in the front-rear direction of the seat plate 51 are sandwiched between the lower surface of the top plate wall 11 and the upper surface of the lower support portion 24 in the seat plate receiving portion 20. The positioning of the seat plate 51 in the vertical direction is performed.

  Next, the configuration of the retainer receiving unit 30 will be described. The retainer receiving portion 30 is formed on the lower surface of the wheel receiving portion 15 of the top plate wall 11 (see FIG. 3) similarly to the seat plate receiving portion 20, and the seat plate 51 is placed at the mounting position in the seat plate receiving portion 20. The retainer member 40 for fixing can be accommodated. The retainer receiving portion 30 is formed adjacent to the seat plate receiving portion 20 on the outer side (in this case, the right side) in the left-right direction, and is a box having a substantially rectangular shape with the lower portion opened. It is formed in a shape. Therefore, the upper part of the retainer receiving part 30 is closed by the top plate wall 11 constituting the wheel receiving part 15.

  As shown in FIG. 5, the retainer receiving portion 30 is formed in a box shape having a longitudinal direction along the front-rear direction of the platform 10, and includes a rotation holding portion 31, a retainer locking portion 35, and a rib. 37. The rotation holding portion 31 corresponds to the rotation mechanism portion of the present invention, and is formed on one end side in the longitudinal direction of the retainer receiving portion 30 (in this case, the rear side of the base plate 10). The retainer locking portion 35 corresponds to the locking mechanism portion of the present invention, and is formed on the other end in the longitudinal direction of the retainer receiving portion 30 (in this case, the front side of the base plate 10).

  The rotation holding portion 31 is configured to have a shaft hole 32 on one end side in the longitudinal direction of the retainer receiving portion 30. The rotation holding unit 31 holds a retainer member 40, which will be described later, so as to be rotatable in the vertical direction with respect to the base plate 10. The shaft holes 32 are respectively formed on the one end side in the longitudinal direction of the retainer receiving portion 30 with respect to the wall portions facing in the left-right direction, and the rotation shafts 45 formed on one end side of the retainer member 40 described later are respectively provided. It is fitted so as to be rotatable (see FIG. 9).

  The shaft hole 32 of the rotation holding part 31 is formed on the outer side in the horizontal direction (on the one end side in the longitudinal direction of the retainer receiving part 30) with respect to the moving path of the seat plate 51 toward the inside of the seat plate receiving part 20. (Refer to FIG. 6 etc.). That is, the shaft hole 32 of the rotation holding portion 31 is formed at a position that does not face the seat plate insertion port 21 through which the seat plate 51 always passes when it reaches the seat plate receiving portion 20. As shown in FIG. 9, since the rotation holding part 31 supports the one end side (rear end part) of the retainer member 40 so as to be rotatable at this position, the retainer member 40 is rotated to insert the seat plate. The retainer member 40 can be completely moved from the moving path of the seat plate 51 through the mouth 21. Thereby, according to the said trolley | bogie 1, the slide movement which concerns on attachment and removal of the seat plate 51 of the caster 50 with respect to the attachment position in the seat-plate receiving part 20 can be performed easily.

  The shaft hole 32 is formed in a wall portion facing the left-right direction of the retainer receiving portion 30 at a position spaced apart from the lower surface of the top plate wall 11 by a predetermined distance. Therefore, according to the cart 1, even when a load or the like is placed on the platform 10 and the top plate wall 11 is deformed to bend downward, the influence of the deformation on the shaft hole 32 is reduced. be able to. As a result, the fitting of the rotating shaft 45 with respect to the shaft hole 32 can be maintained, and the retainer member 40 can be prevented from falling off from the retainer receiving portion 30.

  The retainer locking portion 35 is configured to have a locking hole 36 on the other end side in the longitudinal direction of the retainer receiving portion 30. The retainer locking portion 35 locks the other end side (in this case, the front end portion) of the retainer member 40 when the retainer member 40 is rotated and accommodated in the retainer receiving portion 30. Rotation in the vertical direction with respect to the lower surface is restricted. The locking hole 36 is formed in the wall portion located on the outer side in the left-right direction (in this case, the right side) on the other end side in the longitudinal direction of the retainer receiving portion 30, and is formed on the other end side of the retainer member 40 described later. By engaging the engaging claw 47 of the lock piece 46, the other end side of the retainer member 40 is engaged.

  The ribs 37 are formed to hang downward from the lower surface of the top wall 11 in the retainer receiving portion 30 and extend along the longitudinal direction of the retainer receiving portion 30 (the front-rear direction of the base plate 10). The rib 37 increases the rigidity of the retainer receiving portion 30 with respect to a load applied in a direction perpendicular to the base plate 10.

(Configuration of retainer member)
Next, the configuration of the retainer member 40 according to the present embodiment will be described in detail with reference to the drawings. As shown in FIGS. 7 and 8, the retainer member 40 is, for example, a synthetic resin injection-molded product, and is formed in a substantially prismatic shape corresponding to the size of the retainer receiving portion 30. , A notch 42, a fitting groove 43, and an elastic locking piece 44.

  The retainer operation part 41 is formed to protrude downward on the front side of the lower surface of the retainer member 40. The retainer operating portion 41 is used by a user when the retainer member 40 is rotated with respect to the retainer receiving portion 30. Specifically, since the retainer operation portion 41 is formed to project downward in a prismatic shape, the user can rotate the retainer member 40 by grasping the side surface portion of the retainer operation portion 41 with a finger or the like. It can be done easily.

  The notch portion 42 is formed by notching the lower surface of the retainer member 40 at the rear portion of the retainer operation portion 41. When the retainer member 40 is fixed in the retainer receiving portion 30 (see FIG. 10), the cutout portion 42 corresponds to the turning range of the wheel support leg 52 in the caster 50, so that the wheel support leg 52 and the wheel 53 are turned. There is no hindrance. That is, the notch 42 functions to ensure the turning performance of the wheel support legs 52 and the like.

  As shown in FIG. 8, a fitting groove 43 is formed on the upper surface of the retainer member 40, and the fitting groove 43 is arranged on a straight line along the front-rear direction. And when the retainer member 40 is arrange | positioned in the retainer receiving part 30, the rib 37 of the retainer receiving part 30 is fitted by the fitting groove 43 (refer FIG. 11). Therefore, when the retainer member 40 is disposed in the retainer receiving portion 30, the retainer member 40 is configured to receive the retainer with respect to a load applied in a direction perpendicular to the base plate 10 by cooperating the rib 37 and the fitting groove 43. The rigidity of the portion 30 is further increased.

  The elastic locking piece 44 is formed on the rear side of the retainer member 40 on the left and right side surfaces of the retainer member 40, and has a rotation shaft 45 at a free end portion located on the rear side. Each elastic locking piece 44 is formed in a cantilever shape having a proximal end portion at the front and a free end portion at the rear by notching the left and right side surfaces of the retainer member 40 so as to penetrate in a substantially U shape in a side view. Is done. Accordingly, the rear end portion (free end portion) of the elastic locking piece 44 is configured to be movable in the left-right direction as the elastic locking piece 44 is elastically deformed.

  As shown in FIGS. 7 and 8, the rotation shaft 45 is formed to project in a columnar shape perpendicular to the left and right side surfaces of the retainer member 40 at the free end portion on the rear end side of the elastic locking piece 44. Yes. As described above, the rotation shaft 45 is fitted into the shaft hole 32 constituting the rotation holding portion 31 (see FIGS. 9 and 10). Therefore, the retainer member 40 is held with respect to the retainer receiving portion 30 so as to be rotatable about the rotation shaft 45.

  The lock piece 46 is formed on the front side of the retainer member 40 on either one of the left and right side surfaces of the retainer member 40 (in this case, the right side surface), and is engaged with a claw at a free end portion located on the upper side. 47. The lock piece 46 is formed to correspond to the locking hole 36 of the retainer receiving portion 30 provided in the left and right side surfaces of the retainer member 40. The lock piece 46 is formed in a cantilever shape having a base end portion on the lower side and a free end portion on the upper end by notching the side surface of the retainer member 40 downward from the upper end with a space in the front-rear direction. Is done. Accordingly, the upper end portion (free end portion) of the lock piece 46 is configured to be movable in the left-right direction as the lock piece 46 is elastically deformed.

  The locking claw 47 is formed at the upper end portion (free end portion) of the lock piece 46 so as to protrude in the vertical direction with respect to the side surface of the retainer member 40. The locking claw 47 is formed in a substantially arrowhead shape with a sharp upper end side, an inclined surface inclined so as to be separated from the side surface of the retainer member 40 as it goes downward from the upper end side, and the retainer member 40 at the lower end of the locking claw 47. A locking surface is formed perpendicular to the side surface. When the retainer member 40 is rotated and accommodated in the retainer receiving portion 30, the locking claw 47 of the lock piece 46 moves into the locking hole 36 of the retainer locking portion 35 with the elastic deformation of the lock piece 46. The lower end of the locking claw 47 is locked to the upper edge of the locking hole 36. Thereby, the downward movement of the other end side (in this case, the front end portion) of the retainer member 40 from the retainer member 40 is restricted.

(Caster mounting and fixing work)
In the cart 1 according to the present embodiment configured as described above, the mounting and fixing work for mounting and fixing the casters 50 to the base plate 10 will be described in detail with reference to FIGS.

  In the following description, the mounting and fixing work of the caster 50 to the seat plate receiving portion 20 and the retainer receiving portion 30 located on the right front side of the base plate 10 will be described as an example, and the description of the other three locations will be omitted. . Further, the seat plate 51 of the caster 50 is not disposed inside the seat plate receiving portion 20, and the retainer member 40 has the rotation shaft 45 fitted in the shaft hole 32 inside the retainer receiving portion 30. It is assumed that it is in a state.

  First, the user picks the retainer operating portion 41 of the retainer member 40 with a finger or the like, and uses the rotation shaft 45 fitted to the rotation holding portion 31 as an axis, with the retainer member 40 being attached to the base plate 10. Rotate vertically. At this time, since the lock piece 46 is elastically deformed in the left-right direction by the operation of the user, the locking claw 47 of the lock piece 46 comes out of the locking hole 36 of the retainer locking portion 35. Then, the retainer member 40 rotates and moves to the outside of the retainer receiving portion 30, so that the retainer member 40 is inserted into the seat plate of the seat plate receiving portion 20 from the outside in the left-right direction (in this case, the right side). It moves from the moving route extending to the mouth 21. Thus, the seat plate 51 of the caster 50 can be slid horizontally to be disposed inside the seat plate receiving portion 20 via the seat plate insertion port 21 (see FIG. 9).

  Here, when the seat plate 51 of the caster 50 is disposed in the seat plate receiving portion 20, the front edge and the rear edge of the seat plate 51 are in contact with the side ribs 22 constituting the seat plate receiving portion 20, respectively. One side edge (in this case, the left side edge) of the seat plate 51 is in contact with the back rib 23 of the seat plate receiving portion 20. Therefore, when the seat plate 51 is disposed in the seat plate receiving portion 20, the movement in the horizontal direction excluding the direction in which the seat plate insertion port 21 is located is restricted.

  Further, the lower surface of the top plate wall 11 and the upper surface of the lower support portion 24 constituting the inside of the seat plate receiving portion 20 are separated by a dimension corresponding to the plate thickness of the seat plate 51. Therefore, when the seat plate 51 is inserted into the seat plate receiving portion 20, both end portions in the front-rear direction of the seat plate 51 are sandwiched between the lower surface of the top plate wall 11 in the seat plate receiving portion 20 and the upper surface of the lower support portion 24. The movement of the seat plate 51 in the vertical direction is restricted.

  Thus, when the seat plate 51 of the caster 50 is disposed at the mounting position in the seat plate receiving portion 20, the user uses the retainer operation portion 41 to rotate the retainer member 40 into the shaft hole 32. The moving shaft 45 is pivoted about the shaft and accommodated in the retainer receiving portion 30. With the rotation of the retainer member 40, the lock piece 46 is elastically deformed by the contact between the wall portion on the front end side of the retainer receiving portion 30 and the locking claw 47. When the retainer member 40 is disposed in the retainer receiving portion 30, the locking claw 47 of the lock piece 46 enters the locking hole 36 of the retainer locking portion 35 by the restoring force of the lock piece 46, and the retainer member The other end portion (front end portion) of 40 is locked to restrict downward movement.

  As shown in FIGS. 10 and 11, when the retainer member 40 is accommodated in the retainer receiving portion 30, the portion of the retainer member 40 excluding the notch portion 42 is seated from the outside in the left-right direction (in this case, the right side) of the base plate 10. It is located on a path extending to the seat plate insertion opening 21 of the plate receiving portion 20. At this time, one side surface of the retainer member 40 is disposed adjacent to the seat plate insertion slot 21 of the seat plate receiving portion 20 and is in contact with the other side edge of the seat plate 51 accommodated in the seat plate receiving portion 20. It arrange | positions possible (refer FIG. 11). Accordingly, one side surface of the retainer member 40 cooperates with the side ribs 22 and the back ribs 23 constituting the seat plate receiving portion 20 to move the seat plate 51 in the horizontal direction in the seat plate receiving portion 20. To regulate.

  In the retainer receiving portion 30, the movement of the front end portion of the retainer member 40 in the vertical direction is restricted by the cooperation of the locking claw 47 of the lock piece 46 and the locking hole 36 of the retainer locking portion 35. The retainer receiving portion 30 is fixed. On the other hand, since each rotation shaft 45 is fitted in the shaft hole 32 constituting the rotation holding portion 31, the rear end portion of the retainer member 40 is also restricted from moving in the vertical direction. That is, in the cart 1, the retainer member 40 can be fixed in the retainer receiving portion 30 by rotating the retainer member 40 with respect to the retainer receiving portion 30, and thus the seat plate 51 of the caster 50. However, it is possible to maintain the state of being fixedly mounted at the mounting position in the seat plate receiving portion 20.

  And in this embodiment, when removing the caster 50 from the base plate 10 lower surface, what is necessary is just to perform the procedure contrary to the attachment fixing work mentioned above. Specifically, similarly to FIGS. 9 to 11, the removal work of the caster 50 located on the right front side of the platform 10 will be described.

  When removing the caster 50, the user applies a force from the state shown in FIGS. 10 and 11 by operating the locking claw 47 from the locking hole 36 and grasping the retainer operating portion 41 and pulling it downward. . As a result, the locking claw 47 of the lock piece 46 comes out of the locking hole 36 of the retainer locking portion 35 due to the elastic deformation of the lock piece 46 accompanying the contact with the wall portion of the retainer member 40. As a result, the other end portion of the retainer member 40 is movable downward, so that the retainer member 40 is provided on the bottom surface of the base plate 10 with the pivot shaft 45 formed at the rear end portion of the retainer member 40 as an axis. It is possible to rotate in the vertical direction (see FIG. 9).

Thus, when the locking claw 47 of the lock piece 46 is disengaged from the locking hole 36 of the retainer locking portion 35, the user uses the retainer around the rotating shaft 45 fitted in the shaft hole 32. The member 40 is rotated in the vertical direction with respect to the bottom surface of the base plate 10. As a result, as shown in FIG. 9, the retainer member 40 moves from the laterally outer side (in this case, the right side) of the base plate 10 along a path extending to the seat plate insertion port 21 of the seat plate receiving portion 20. The seat plate 51 of the caster 50 is slidable from the inside of the seat plate receiving portion 20 toward the seat plate insertion slot 21.

  Thereafter, the user can remove the seat plate 51 from the seat plate receiving portion 20 by sliding the seat plate 51 of the caster 50 in the direction of the seat plate insertion slot 21, so that the caster 50 can be removed. To complete.

  As described above, the cart 1 according to the present embodiment includes the base plate 10 made of synthetic resin and the plurality of casters 50 attached to the lower surface of the base plate 10. Articles can be loaded on the board 10 and used for transportation work. As shown in FIGS. 3, 5, and 6, a seat plate receiving portion 20 and a retainer receiving portion 30 are formed on the lower surface at the four corners of the base plate 10, and the retainer receiving portion 30 is formed of the seat plate. On the side of the seat plate insertion port 21 of the receiving part 20, it is arranged at a position adjacent in the horizontal direction. Therefore, according to the said trolley | bogie 1, since the seat-plate receiving part 20 and the retainer receiving part 30 are formed adjacent to the horizontal direction, it can respond to size reduction and weight reduction of the base board 10 regarding an up-down direction. . As a result, the bogie 1 can cope with the miniaturization and weight reduction of the bogie 1 itself by responding to the miniaturization and lightening of the base plate 10 constituting the main part of the bogie 1.

  In the cart 1, the retainer receiving portion 30 is configured to include a rotation holding portion 31 and a retainer locking portion 35, and the rotation holding portion 31 is configured with respect to the retainer receiving portion 30. The retainer member 40 is rotatably supported about the one end side of the retainer member 40 as an axis. Therefore, when the retainer member 40 is rotated and accommodated in the retainer receiving portion 30, one side surface of the retainer member 40 is disposed at a position adjacent to the seat plate insertion opening 21 of the seat plate receiving portion 20. can do.

  The movement of the seat plate 51 of the caster 50 in the horizontal direction excluding the seat plate insertion port 21 side is regulated by the side ribs 22 and the back ribs 23 of the seat plate receiving portion 20. Therefore, one side surface of the retainer member 40 is disposed at a position adjacent to the seat plate insertion port 21 of the seat plate receiving portion 20, and the movement of the seat member 51 toward the seat plate insertion port 21 is restricted, so Movement can be restricted. Further, since the seat plate 51 of the caster 50 is sandwiched between the lower support portion 24 of the seat plate receiving portion 20 and the lower surface of the top plate wall 11, movement in the vertical direction is restricted. Therefore, according to the cart 1, the seat plate 51 of the caster 50 is easily attached to the seat plate receiving portion 20 by a simple operation of rotating the retainer member 40 in the retainer receiving portion 30. Can be fixed.

  And the retainer latching | locking part 35 latches the other end side of the said retainer member 40, when the retainer member 40 rotates and it accommodates in the retainer receiving part 30. FIG. One end side of the retainer member 40 is rotatably held by the shaft hole 32 of the rotation holding portion 31, and movement in a direction perpendicular to the lower surface of the base plate 10 is restricted. That is, when the retainer member 40 is accommodated in the retainer receiving portion 30, the retainer member 40 moves in a direction perpendicular to the lower surface of the platform 10 by the cooperation of the rotation holding portion 31 and the retainer locking portion 35. Are regulated as a whole. Thereby, according to the said trolley | bogie 1, since the position of the retainer member 40 in the retainer receiving part 30 can be fixed by the rotation holding | maintenance part 31 and the retainer latching | locking part 35, the seat board 51 of the caster 50 is used as the seat board. The state located in the attachment position in the receiving part 20 can be maintained.

  As shown in FIG. 6 and the like, the shaft hole 32 of the rotation holding portion 31 is on the outer side in the horizontal direction with respect to the moving path of the seat plate of the caster 50 toward the mounting position in the seat plate receiving portion 20. It is formed and is located at a position that does not face the seat plate insertion opening 21. Therefore, according to the cart 1, the retainer member 40 can be reliably moved from the movement path of the seat plate 51 of the caster 50 by rotating the retainer member 40 (see FIG. 9). The 50 seat plates 51 can be easily arranged at the mounting position in the seat plate receiving portion 20.

  Further, the retainer member 40 has a retainer operation portion 41. The retainer operation portion 41 includes the retainer member 40 accommodated in a retainer receiving portion 30 as shown in FIGS. In a state where the other end side is locked by the locking portion 35, it protrudes downward from the seat plate receiving portion 20. Therefore, even when the retainer member 40 is accommodated in the retainer receiving portion 30, the retainer operation portion 41 can be grasped. Therefore, according to the cart 1, the operation related to the engagement / disengagement with respect to the retainer member 40 is possible. And the rotation operation of the retainer member 40 can be performed easily.

  As shown in FIG. 6 and the like, each shaft hole 32 of the rotation holding portion 31 is formed in the retainer receiving portion 30 at a position spaced apart from the top wall 11 of the base plate 10 by a predetermined distance. . Therefore, according to the cart 1, even if the base plate 10 is bent and deformed by a load caused by a load or the like placed on the top wall 11 constituting the upper surface of the base plate 10, the base plate 10 is deformed. Can be reduced, and the state in which one end side of the retainer member 40 is rotatably held can be maintained.

  Further, the retaining hole 36 of the retainer retaining portion 35 is formed in the retainer receiving portion 30 at a position spaced apart from the top plate wall 11 constituting the upper surface of the base plate 10 by a predetermined distance downward (FIG. 6 etc.). Therefore, according to the cart 1, even if the base plate 10 is bent and deformed by a load caused by a load or the like placed on the top wall 11 constituting the upper surface of the base plate 10, the base plate 10 is deformed. Can reduce the influence on the retainer locking portion 35, and the state where the other end side of the retainer member 40 is locked can be maintained.

  In the carriage 1, the retainer member 40 is configured to receive the retainer formed on the base plate 10 by fitting the rotation shaft 45 of the elastic locking piece 44 into the shaft hole 32 of the rotation holding portion 31. The unit 30 is integrally attached to the unit 30. Therefore, when the caster 50 is exchanged, the retainer member 40 does not move to a position completely different from the base plate 10, and it is possible to prevent the retainer member 40 from being lost.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the cart 1 according to the above-described embodiment, the rotation holding portion 31 is configured by the shaft hole 32 and the rotation shaft 45 of the retainer member 40 is pivotally supported. However, the present invention is limited to this aspect. Is not to be done. That is, the rotation mechanism part in the present invention can adopt various modes as long as it is configured to hold the end of the retainer member 40 so as to be rotatable with respect to the retainer receiving part 30, for example, It is also possible to form a rotation shaft in the rotation holding portion 31 and to form a shaft hole on one end side of the retainer member 40.

  In the above-described embodiment, the retainer locking portion 35 has the locking hole 36 and cooperates with the lock piece 46 of the retainer member 40 to lock the other end side of the retainer member 40. However, the present invention is not limited to this mode. That is, as long as the retainer locking portion 35 is configured to lock the retainer member 40 so as to restrict movement in the direction perpendicular to the bottom surface of the base plate 10 when the retainer member 40 is disposed in the retainer receiving portion 30, there are various types. The following embodiments can be adopted. For example, it is possible to form a locking piece on the retainer locking portion 35 and to form a locking hole on the other end side of the retainer member 40.

  And in embodiment mentioned above, although the retainer operation part 41 of the retainer member 40 had made the square pillar shape protruded below in the front side of the retainer member 40 lower surface, it is limited to this aspect. is not. The operation unit according to the present invention can be operated in various ways as long as the retainer member 40 is accommodated in the retainer receiving portion 30 and the other end side is locked and protrudes downward from the seat plate receiving portion 20. Embodiments may be employed.

  Further, in the above-described embodiment, the retainer member 40 is disposed integrally with the base plate 10 via the rotation holding portion 31 of the retainer receiving portion 30, but is not limited to this mode. . It is also possible to form the retainer member 40 separately from the base plate 10.

  Furthermore, in the above-described embodiment, the casters 50 are respectively attached to the four corners of the base board 10, but the present invention is not limited to this mode. That is, the shape of the base 10 is not limited to the above-described embodiment, and the number of casters 50 can be changed as appropriate. In addition, a handle member used for the steering operation of the carriage 1 may be further attached to the base board 10.

DESCRIPTION OF SYMBOLS 1 Carriage 10 Base 20 Seat plate receiving part 22 Side part rib 23 Back part rib 24 Lower support part 30 Retainer receiving part 31 Rotation holding part 32 Shaft hole 35 Retainer latching part 36 Locking hole 40 Retainer member 41 Retainer operation part 44 Elastic locking piece 45 Rotating shaft 46 Locking piece 47 Locking claw 50 Caster 51 Seat plate

Claims (5)

A base plate made of synthetic resin,
A plurality of casters attached to the lower surface of the base plate,
The platform is
A seat plate receiving portion for receiving the seat plate of the caster in a state along the lower surface of the platform;
It is adjacent to the seat plate receiving portion in the horizontal direction and is formed on the upstream side in the moving direction of the seat plate of the caster toward the mounting position in the seat plate receiving portion. A retainer receiving portion for accommodating a retainer member to be fixed in the portion;
The retainer receiving portion is
A rotating mechanism that supports the retainer receiving portion so as to be rotatable about one end side of the retainer member;
A locking mechanism portion that locks the retainer member when the retainer member rotates in a direction perpendicular to the lower surface of the base and is received in the retainer receiving portion. A trolley characterized by The cart according to claim 1,
The rotation mechanism unit is
The cart is formed on the outer side in the horizontal direction with respect to a moving path of the seat plate of the caster toward the mounting position in the seat plate receiving portion. A cart according to claim 1 or claim 2,
The retainer member is
A carriage having an operation portion that is accommodated in the retainer receiving portion and protrudes downward from the seat plate receiving portion in a state where the retainer receiving portion is locked by the locking mechanism portion. A carriage according to any one of claims 1 to 3,
The turning mechanism and the locking mechanism are
In the retainer receiving portion, the carriage is formed at a position spaced a predetermined distance downward from a top plate constituting the upper surface of the base board. A carriage according to any one of claims 1 to 4,
The retainer member is
A cart that is integrally attached to the base plate via the rotation mechanism portion formed in the retainer receiving portion.

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