JP2009248954A - Dolly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dolly for allowing an worker to easily and quickly take a lock member out of an insertion space part by hand. <P>SOLUTION: A bottom A1' of the lock member insertion space part is provided with a finger insertion space portion F1 which is opened on its lower side and into which a finger can be inserted, and a finger insertion space portion F2 which is opened on its lower side and into which a finger can be inserted. In such a state that a caster C is mounted on a dolly body D', a lock member H1 inserted into the lock member insertion space part is located in one finger insertion space portion F1 and an elastic tongue piece formed on the lock member is located in the other finger insertion space portion F2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a carriage composed of a carriage body integrally molded with a synthetic resin and casters attached to four corners on the back surface of the carriage body.

  In the patent document 1, the applicant of the present invention has one elastically deformable elastic member in which a locking projection is provided on the lower surface of the tip of the caster mounting portion formed on the back surface of the cart body integrally formed of synthetic resin. A caster seat plate is formed by forming a tongue piece, locking the caster seat plate to the elastic tongue piece, and then inserting the lock member into the lock member insertion space formed on the back surface of the cart body. A cart has been proposed in which the elastic tongue in a locked state is prevented from bending upward.

  The lock member described above has a fitting arm that fits into the lock member insertion space and an elastic tongue that has a locking projection formed on the back surface, and the locking projection is formed on the cart body. The locking member is configured so as not to easily come out of the locking member insertion space by being engaged with an appropriate rib.

JP 2006-62429 A

  To remove the caster from the carriage, the elastic tongue of the lock member inserted in the lock member insertion space of the carriage main body is bent upward, and the engagement protrusion of the elastic tongue engages with the engagement protrusion. After removing from the appropriate rib of the cart body that is stopped, the lock member is pulled out from the lock member insertion space, and then the elastic tongue formed on the caster mounting portion of the cart body is bent upward, The locking state between the seat plate of the caster and the locking projection of the elastic tongue piece is released, and the caster is removed from the cart body.

  As described above, in order to remove the caster from the carriage, the elastic tongue of the lock member inserted in the lock member insertion space of the carriage main body is bent upward to lock the elastic tongue of the lock member. The locking state between the protrusion and the appropriate rib of the cart body must be released, but in conventional carts, a thin rod-shaped device such as a screwdriver is placed in the small hole formed in the bottom of the lock member insertion space. Therefore, the elastic tongue of the lock member has to be bent upward, and there is a problem that workability of removing the caster from the carriage is poor.

  Also, when removing the caster from the cart, the upper end of the caster shaft comes into contact with the locking projection of the elastic tongue formed on the caster mounting portion of the cart body, and the workability of removing the caster from the cart becomes worse. There is a problem that the locking projection of the elastic tongue piece is damaged.

  An object of the invention of the present application is to solve the problems of the above-described conventional carriage.

  In order to achieve the above-described object, the present invention provides a cart having a cart body and casters attached to corners on the back surface of the cart body. First, a lower portion is provided at the bottom of the lock member insertion space. In the state where the caster is attached to the dolly main body while forming the finger insertion space part that is open and into which the finger can be inserted, and the lower part is opened and the finger insertion space part into which the finger can be inserted is formed. The lock member inserted in the lock member insertion space portion is positioned in one finger insertion space portion, and the elastic tongue formed on the lock member is positioned in the other finger insertion space portion. Secondly, the elastic tongue piece, which forms a bottom portion of the lock member insertion space portion of the carriage main body and has a locking projection for locking the seat plate of the caster, has a predetermined interval. A pair, formed Together are, the elastic tongue pieces, in which caster axis is configured to be positioned.

  In the cart having the cart body and the casters attached to the corners on the back surface of the cart body, the bottom of the lock member insertion space portion is opened at the bottom, and the finger insertion space portion into which a finger can be inserted, In the state where the lower part is opened and a finger insertion space part into which a finger can be inserted is formed, and the caster is attached to the cart body, it is inserted into the lock member insertion space part in one finger insertion space part. The lock member is positioned, and the elastic tongue formed on the lock member is positioned in the other finger insertion space portion. The operator pulls out the lock member from the lock member insertion space portion easily and quickly by hand without releasing the lock state of the lock member using the removal tool. Door can be.

  A pair of elastic tongue pieces, each of which forms a bottom portion of the lock member insertion space portion of the carriage body and has a locking projection for locking the seat plate of the caster, are formed at a predetermined interval. Since the caster shaft is positioned between the two pieces, when removing the caster from the carriage, the upper end of the caster shaft comes into contact with the locking protrusion of the elastic tongue piece, and the workability of removing the caster from the carriage is improved. It is possible to solve the problems of conventional carts such as deterioration and damage to the locking projections of the elastic tongue pieces.

  First, the carriage D will be outlined with reference to FIGS. 1 to 3 and 7.

  The cart D is composed of a cart body D ′ having a substantially square shape, and casters C that are detachably attached in the vicinity of four corners on the back surface of the cart body D ′. As shown in FIG. 3, the caster C includes a square seat plate c1, wheels c2, and caster shafts c3.

  The cart body D ′ is formed along the three sides of the mounting plate 1 and the upper surface of the mounting plate 1 having a substantially square planar shape, and the planar shape is substantially U-shaped. The bank portion 2 is formed by bulging upward from the back surface, and the bank portion 2 has one end of the opposing long side bank portion 2a and the long side bank portion 2a. It is comprised from the short side bank part 2b to connect.

  Moreover, the caster fitting recessed part 3 is formed along the long side bank part 2a by denting the mounting board 1 located in the vicinity of both ends of the long side bank part 2a downward from the upper surface. The caster fitting recess 3 includes an opposing short side wall 3a substantially parallel to the short side bank portion 2b, an opposing long side wall 3b substantially parallel to the long side bank portion 2a, and the short side bank portion 2b. As seen, it has a curved bottom 3c that is curved along the tread c2a of the wheel c2 of the caster C. Further, 3d is a partition wall that is formed substantially in parallel to the short side bank portion 2b and bisects the caster fitting recess 3 and any of the caster fitting recesses 3 partitioned by the partition wall 3d The caster c2 can be fitted. Furthermore, 3e is a plurality of reinforcing vertical ribs suspended from the back surface of the curved bottom portion 3c, and the caster fitting recess 3 has at least a long side wall 3b opposed to the opposed short side wall 3a, a curved bottom portion 3c, and a reinforcing vertical portion. Ribs 3e are formed.

  An outer peripheral wall 4 is formed along the edge of the mounting plate 1 substantially perpendicularly to the mounting plate 1, and an opening is formed in a substantially central portion of the mounting plate 1 as necessary. Part 1a is formed. The opening 1a functions as an opening for the handle, and is configured so that support struts can be inserted into the opening 1a so that the stacked carts D do not collapse. Furthermore, a large number of vertical ribs 5 are suspended from the back surface of the mounting plate 1 along the long side bank portion 2a and the short side bank portion 2b.

  Next, the lock member insertion space A1 into which a lock member described later is inserted will be described with reference to FIGS.

  The lock member insertion space A1 is formed below the caster fitting recess 3, and is therefore formed at four locations near the corner of the carriage body D '. In the following description, the lock member insertion space portion A1 will be mainly described by taking the lock member insertion space portion A1 formed on the side where the short side bank portion 2b is not formed as an example.

  The locking member insertion space A1 is in the vicinity of the long side wall portion 4a of the outer peripheral wall 4 and is substantially parallel to the long side wall portion side vertical rib a1 substantially parallel to the long side wall portion 4a, and the long side wall portion side vertical rib a1. In addition, the vertical rib a <b> 2 near the center formed at a predetermined interval is provided, and the long side wall-side vertical rib a <b> 1 and the central side vertical rib a <b> 2 are suspended from the back surface of the mounting plate 1. One end of the outer peripheral wall 4 is connected to the short side wall 4b and extends to the vicinity of the short side wall 3a located closer to the center of the short side walls 3a opposed to the caster fitting recess 3. Yes. Further, the long side wall portion-side vertical rib a1 and the central portion-side vertical rib a2 are connected by a connecting vertical rib a3 at an appropriate location. Furthermore, the long side wall portion side vertical rib a1 and the central portion side vertical rib a2 are the same height, and the lower end of the long side wall portion side vertical rib a1 and the lower end of the central portion side vertical rib a2 are The connecting vertical rib a3 is configured to be located slightly below the lower end, and the connecting vertical rib a3 is formed to be lower than the height of the long side wall side vertical rib a1 and the central vertical rib a2. The lower end of the vertical rib a3 is located above the lower end of the long side wall portion side vertical rib a1 and the lower end of the vertical rib a2 closer to the center portion. Reference numeral 6 denotes a rectangular tube-shaped leg portion 6 suspended from the back surface of the mounting plate 1. The upper and lower carts D and D are cross-stacked (the upper cart D). The long side bank portion 2a of the trolley D and the long side bank portion 2a of the trolley D positioned below are stacked so as to be orthogonal to each other. The leg portion 6 is configured to be placed on the placement plate 1 of the cart D located below.

  The bottom part A1 'of the lock member insertion space part A1 has a base part a4 extending from the short side wall part 4b of the outer peripheral wall 4 in a direction of the connecting vertical rib a3. The base part a4 connects the inner vertical rib a4a substantially parallel to the short side wall part 4b of the outer peripheral wall 4, the inner vertical rib a4a and the short side wall part 4b of the outer peripheral wall 4, and is substantially connected to the long side wall part side vertical rib a1. A pair of parallel intermediate vertical ribs a4b is provided, and the long side wall portion side vertical ribs a1 and the intermediate vertical rib a4b adjacent to the long side wall portion side vertical ribs a1 are substantially parallel to the inner vertical ribs a4a. Similarly, the central vertical rib a2 and the intermediate vertical rib a4b adjacent to the central vertical rib a2 are predetermined parallel to the inner vertical rib a4a. It is connected by a number of compartment vertical ribs a4c ′. In the present embodiment, an example is shown in which one partition vertical rib a4c and the other partition vertical rib a4c 'are formed two by two.

  A top plate a4d is formed on the upper surface of the base portion a4, and a top plate portion a4d ′ located between the pair of intermediate vertical ribs a4b is formed on the long side wall portion side vertical rib a1 and the long side wall portion side vertical rib a1. It is located above the top plate portion a4d ″ located between the adjacent intermediate vertical ribs a4b and between the central vertical ribs a2 and the intermediate vertical ribs a4b adjacent to the central vertical ribs a2. Hereinafter, the top plate portion a4d ′ positioned between the pair of intermediate vertical ribs a4b is referred to as a central convex top plate portion a4d ′, and the long side wall portion side vertical rib a1 and the long side wall portion side vertical rib a1. A top plate located between the adjacent intermediate vertical ribs a4b and between the central vertical ribs a2 and the intermediate vertical ribs a4b adjacent to the central vertical ribs a2, in other words, a central convex top plate The top plate located on both sides of the part a4d ′ It is referred to as a plate portion a4d ". Further, the lower top plate portion a4d ″ constituting the top plate a4d is located below the upper end of the inner vertical rib a4a.

  At the upper end of the inner vertical rib a4a, a pair of cantilevered elastic tongues a5 that are elastically deformable and extend substantially in the vicinity of the connecting vertical rib a3 are formed. A locking projection a5a projects from the lower surface of the distal end portion of the elastic tongue piece a5. As shown in FIG. 9, the locking projection a5a is located below the lower end a3a of the connecting vertical rib a3 described above in a normal state where no load is applied to the elastic tongue a5 from the vertical direction. .

  In addition, the corner formed by the long side wall portion side vertical rib a1 and the inner vertical rib a4a and the corner portion formed by the center portion vertical rib a2 and the inner vertical rib a4a are respectively near the connecting vertical rib a3. A support block a6 extending up to is formed. Further, the long side wall portion-side vertical rib a1, the central portion-side vertical rib a2, the inner vertical rib a4a, and the vertical rib 5a that is parallel to the connecting vertical rib a3 and positioned inside the connecting vertical rib a3. The lower end 5b1 of the vertical rib 5b formed in the region to be formed forms the same plane as the lower end a3a of the connecting vertical rib a3. In other words, the vertical rib 5b and the mounting plate 1 of the connecting vertical rib a3 The height from the back surface is the same. A gap substantially the same as the thickness c4 of the seat plate c2 of the caster C is formed between the virtual plane formed by the lower end 5b1 of the vertical rib 5b and the lower end a3a of the connecting vertical rib a3 and the upper surface of the support block a6. Is formed. In this gap, one opposing side region c1a of the seat plate c1 of the caster C is configured to be fitted.

  As described above, the base part a4, the pair of cantilevered elastic tongue pieces a5, and the support block a6 constitute the bottom part A1 ′ that forms the lock member insertion space part A1, and the long side wall part side described above. A lock member insertion space A1 is formed by the vertical rib a1, the central vertical rib a2, the connecting vertical rib a3, the bottom A1 ′, and the mounting plate 1, and the short side wall 4b of the outer peripheral wall 4 is formed on the short side wall 4b. Is formed with an inverted concave-shaped opening A1 ″ that is inserted into the lock member insertion space A1 and into which the lock member is inserted.

  As shown in FIG. 4 to FIG. 6 and FIG. 8, the lower horizontal part 4b1 of the short side wall part 4b constituting the opening part A1 ″ and the base part a4 constituting the bottom part A1 ′ of the lock member insertion space part A1 The space F1 surrounded by the formed pair of opposed intermediate vertical ribs a4b, the inner vertical ribs a4a that similarly form the base a4, and the mounting plate 1 and opened at the lower side is the tip of the finger In the following, the space part with the lower part opened is referred to as a central finger insertion space part F1.

  Further, as shown in FIGS. 4 to 6 and 9, the long side wall portion side vertical rib a1, the intermediate side vertical rib a4b facing the long side wall portion side vertical rib a1, and the opposing partition vertical rib a4c. The space F2 surrounded by the mounting plate 1 and opened at the bottom is formed as a space into which the tip of the finger can be inserted. Hereinafter, the space part in which the lower part is opened is referred to as a side finger insertion space part F2. Similarly, it is surrounded by the vertical rib a2 near the center, the intermediate vertical rib a4b facing the vertical rib a2 near the center, the partitioning vertical rib a4c ′ facing the mounting rib 1, and the lower side. The open space F2 ′ is formed as a space into which the tip of the finger can be inserted. Hereinafter, the space part in which the lower part is opened is referred to as a side finger insertion space part F2 '. Such side finger insertion spaces F2 and F2 'having the same shape are formed so as to sandwich the above-described central finger insertion space F1 via the intermediate vertical rib a4b.

  Next, with reference to FIGS. 10 and 11, a description will be given of the locking member H <b> 1 having a substantially U-shaped planar shape that is inserted into the locking member insertion space A <b> 1.

  The lock member H1 has a pair of opposing side block portions h1 and a connection block h2 that connects one end of the side block portion h1, and is provided on the side block portion h1 side of the connection block h2. An extrusion convex portion h2b protrudes from a substantially central portion of the vertical side wall h2a. Further, the upper surface h1a of the side block part h1 and the upper surface h2c of the connection block h2 are formed flush with each other, and the lower surface h1b of the side block part h1 located on the connection block h2 side is in contact with the contact block h3. The tip of the contact block h3 is formed as a vertical tip surface h3a.

  By forming a substantially U-shaped slit h3c in the bottom plate h3b constituting the contact block h3, the elastically deformable elasticity having a free end on the opposite side of the vertical tip surface h3a of the contact block h3. A tongue piece h3d is formed, and a locking projection h3d1 projects from the back surface of the tip of the elastic tongue h3d.

  Next, the insertion of the lock member H1 into the lock member insertion space A1 formed in the cart body D 'will be described with reference to FIGS.

  First, as shown in FIG. 12, the caster C is connected to the tip end side of the seat plate c1 of the caster C (the end side of the caster C in the insertion direction into the lock member insertion space A1) c1b. It arrange | positions so that it may contact | abut to the lower surface of the latching protrusion a5a of the piece a5, or may exist in the position away from the free end of the elastic tongue piece a5. Next, the caster C is positioned on the side of the opening A1 ″ of the lock member insertion space A1, and the upper surface of the seat plate c1 of the caster C is brought into contact with the lower end 5b1 of the vertical rib 5b and the lower end a3a of the connecting vertical rib a3. When horizontally moved, one opposed side region c1a of the seat plate c1 of the caster C is formed by the virtual plane formed by the lower end 5b1 of the vertical rib 5b and the lower end a3a of the connecting vertical rib a3, and the upper surface of the support block a6 At the same time, the seat plate c1 of the caster C curves and deforms the elastic tongue a5 upward, and the rear end side (caster C1 of the caster C) The end side c1b of the seat plate c1 of the caster C is perpendicular to the inner side when the end side c1c of the lock member insertion space A1 exceeds the locking projection a5a of the elastic tongue a5. As shown in FIG. 13, the elastic tongue piece a5 returns to a substantially horizontal state as shown in FIG. The partial region c1a is fitted into the gap, and the seat plate c1 of the caster C is disposed between the locking projection a5a of the elastic tongue a5 and the inner vertical rib a4a.

  Next, as shown in FIG. 14, the front end of the side block portion h1 of the lock member H1 is opposed to the opening A1 ″ of the lock member insertion space portion A1, and the side block portion h1 of the lock member H1. Is inserted into the opening A1 ″ of the lock member insertion space A1. When the lock member H1 is inserted into the lock member insertion space A1, as shown in FIG. 15, the front end face h1c of the side block portion h1 of the lock member H1 is connected to the connecting vertical rib. The vertical tip surface h3a of the contact block h3 that forms the lock member H1 is in contact with or close to the base portion a5b of the elastic tongue a5. Is configured to do.

  Further, in the process of inserting the lock member H1 into the lock member insertion space A1, the engaging protrusion h3d1 of the elastic tongue h3d formed on the bottom plate h3b of the contact block h3 constituting the lock member H1 is inserted into the lock member. The elastic tongue piece h3d is curved upward by contacting the upper surface of the lower top plate portion a4d ″ of the base portion a4 that forms the space portion A1, and the locking projection h3d1 of the elastic tongue piece h3d is When the plate portion a4d ″ is exceeded, as shown in FIG. 15, the elastic tongue h3d returns to a substantially horizontal state by its elastic restoring force, and the locking projection h3d1 of the elastic tongue h3d It will be in the state which approached the division vertical rib a4c facing the lower horizontal part 4b1. Therefore, even if the lock member H1 tries to move outward from the state shown in FIG. 15, the locking projection h3d1 of the elastic tongue h3d abuts on the partition vertical rib a4c facing the lower horizontal portion 4b1. The movement of the lock member H1 to the outside is limited, and therefore, the lock member H1 can be prevented from coming out of the lock member insertion space A1 formed in the chassis main body D ′.

  Further, one opposing side region c1a of the seat plate c1 of the caster C is between the virtual plane formed by the lower end 5b1 of the vertical rib 5b and the lower end a3a of the connecting vertical rib a3 and the upper surface of the support block a6. And the seat plate c1 of the caster C is disposed between the locking projection a5a of the elastic tongue a5 and the inner vertical rib a4a, and the lock member H1 is mounted on the cart body. As shown in FIG. 16, in the state of being inserted into the lock member insertion space A1 formed in D ′, in other words, in the state where the caster C is attached to the carriage body D ′, The pushing projection h2b formed on the connecting block h2 constituting the locking member H1 is positioned in the center finger insertion space F1.

  Furthermore, in the state where the caster C is attached to the cart body D ′, as shown in FIG. 17, the elastic tongue constituting the lock member H1 is formed in the side finger insertion space portions F2 and F2 ′. The piece h3d is configured to be positioned.

  When the caster C is removed from the cart body D ′, two fingers, for example, the index finger and the ring finger of one hand are inserted into the side finger insertion space portions F2, F2 ′, and the side finger insertion space is inserted. The elastic tongue h3d formed in the pair of side block portions h1 of the lock member H1 located in the portions F2 and F2 ′ is bent upward as shown in FIG. The h3d locking projection h3d1 is disposed above the upper surface of the lower top plate a4d ″, and while maintaining this state, another finger, for example, the middle finger of the same hand, is placed in the central finger insertion space F1. Is moved in the direction of the opening A1 ″ of the lock member insertion space A1, by moving the push-out projection h2b of the connection block h2 constituting the lock member H1 located in the central finger insertion space F1. Lock member H1 is inserted into the lock member Discharged from the part A1. When the lock member H1 is discharged from the lock member insertion space A1, the elastic tongue a5 formed on the carriage body D ′ can be bent upward, so that the elastic tongue a5 is bent upward. Then, the locking protrusion a5a of the elastic tongue a5 is disposed above the upper surface of the seat plate c1 of the caster C, and then one of the opposite side regions c1a of the seat plate c1 of the caster C is set to the vertical rib. By ejecting the caster C from the cart body D ′ by discharging it from the gap formed between the imaginary plane formed by the lower end 5b1 of 5b and the lower end a3a of the connecting vertical rib a3 and the upper surface of the support block a6, It is configured to be removable.

  A pair of elastic tongues a5 are formed on the bottom part A1 ′ constituting the lock member insertion space part A1 formed in the cart body D ′ described above, with the caster fitting recesses 3 interposed therebetween. Compared to the conventional carriage formed just below the caster fitting recess, the gap between the upper surface of the elastic tongue a5 and the curved bottom 3c of the caster fitting recess 3 located above the elastic tongue a5 Since the gap is sufficiently wide without increasing the thickness of the carriage main body D ′, the strength of the lock member H1 can be sufficiently maintained.

  As described above, by configuring, it is possible to suppress an increase in the height of the cart body D ′, so that it is possible to suppress the stacking height of the cart, and therefore to reduce the storage space of the cart. In addition, the traveling of the carriage can be stabilized.

  Further, since the pair of elastic tongues a5 are formed with the caster fitting recess 3 interposed therebetween, one opposing side region c1a of the seat plate c1 of the caster C is connected to the lower end 5b1 of the vertical rib 5b. When discharging from a gap formed between a virtual plane formed by the lower end a3a of the rib a3 and the upper surface of the support block a6, the upper end of the caster shaft c3 of the caster C is locked to the elastic tongue a5. Therefore, the caster C can be removed from the carriage main body D ′ and workability of the caster C can be improved, and damage to the locking protrusion a5a of the elastic tongue a5 can be prevented.

  Further, the tip end c1b of the seat plate c1 of the caster C (the end of the caster C in the direction of insertion into the lock member insertion space A1) is the bottom A1 ′ of the lock member insertion space A1 formed in the cart body D ′. And the rear end side of the seat plate c1 of the caster C (end side opposite to the insertion direction of the caster C into the lock member insertion space A1) c1c However, the rear end side c1c of the seat plate c1 of the caster C is formed by one elastic tongue piece, because it is configured to come into contact with or close to the locking projection a5a of the pair of elastic tongue pieces a5. Compared with the conventional cart that is supported at one point, it is supported at two points, so that the backlash of the seat plate of the caster can be suppressed, and therefore the noise during traveling of the cart D can be reduced. , Dolly D It is possible to realize a stable running.

  In the base a4 that constitutes the bottom part A1 ′ of the lock member insertion space part A1, a lower part is opened and a central finger insertion space part F1 into which a finger can be inserted is formed. A side finger insertion space F2 is formed which is open at the bottom and into which a finger can be inserted. In addition, in the state where the caster C is attached to the cart body D ′, the center finger insertion space F1 is locked. The protruding protrusion h2b protruding from the connecting block h2 of the member H1 is positioned, and the pair of elastic tongues h3d formed on the locking member H1 are positioned in the side finger insertion space F2. Since it comprised, a finger | toe is inserted in the side part finger insertion space part F2, and the elastic tongue piece h3d of the lock member H1 is each curved upward, the lock | rock state of the lock member H1 is cancelled | released, and center finger insertion space | interval By inserting a finger into the portion F1, the lock member H1 can be moved in the direction of the opening A1 ″ of the lock member insertion space A1, and therefore, as in the prior art, a removal tool such as a thin rod-like instrument such as a driver. The operator can easily and quickly extract the lock member H1 from the lock member insertion space A1 without releasing the locked state of the lock member H1. .

  In the embodiment shown in FIGS. 19 and 20, the pair of cantilevered elastic tongues a5 is not the inner vertical rib a4a substantially parallel to the short side wall 4b of the outer peripheral wall 4, but the long side wall side vertical Except for being formed on a connecting vertical rib a3 that connects the rib a1 and the vertical rib a2 near the center, it is substantially the same as the embodiment described above, including the lock member H1.

  In a state where the caster C is attached to the cart body D ′, the seat plate c1 of the caster C is disposed between the locking projection a5a of the pair of elastic tongue pieces a5 and the connecting vertical rib a3. .

FIG. 1 is a perspective view of the carriage of the present invention. FIG. 2 is a partially enlarged perspective view from below of the carriage of the present invention. FIG. 3 is a perspective view of a caster constituting the carriage of the present invention. FIG. 4 is a partially enlarged perspective view from below of the carriage main body constituting the carriage of the present invention. FIG. 5 is a partially enlarged perspective view from below of the carriage main body constituting the carriage of the present invention including a partial cross section. FIG. 6 is a partially enlarged perspective view from the lower side of the carriage main body constituting the carriage of the present invention including the same partial cross section as FIG. FIG. 7 is a partial vertical cross-sectional view along the short side bank portion of the cart body constituting the cart of the present invention. FIG. 8 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention. FIG. 9 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention. FIG. 10 is a perspective view of a lock member constituting the carriage of the present invention. FIG. 11 is a perspective view of the back side of the lock member constituting the carriage of the present invention. FIG. 12 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention. FIG. 13 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention similar to FIG. FIG. 14 is an exploded perspective view of a part of the carriage main body and the lock member constituting the carriage of the present invention. FIG. 15 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention. FIG. 16 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention similar to FIG. 15. FIG. 17 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention similar to FIG. 15. FIG. 18 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage of the present invention similar to FIG. FIG. 19 is a partially enlarged perspective view of a cart body constituting a cart according to another embodiment of the present invention. FIG. 20 is a partial vertical cross-sectional view along the long side bank portion of the carriage main body constituting the carriage shown in FIG.

Explanation of symbols

A1 ............ Lock member insertion space A1 '... Bottom a4 ... Base a5 ...・ Elastic tongue piece C ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Caster c1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seat plate c2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel D ・ ・ ・ ・ ・ ・... Dolly D '... Dolly body F1 ... Center finger insertion space F2 ... Side finger insertion Space H1 ... Lock member
h1 ... side block h2 ... connection block h3d ... elastic tongue 1 ...・ ・ Mounting plate 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bank 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Caster fitting recess

Claims (2)

  In a cart having a cart main body and casters attached to the corners on the back of the cart main body, a finger insertion space part into which a lower part is opened and a finger can be inserted is formed at the bottom part forming the lock member insertion space part, Similarly, the lower part is opened and a finger insertion space part into which a finger can be inserted is formed, and in the state where a caster is attached to the cart body, the lock member insertion space part is inserted into one finger insertion space part. The cart is configured such that the lock member inserted into the lock member is positioned, and the elastic tongue formed on the lock member is positioned in the other finger insertion space.   A pair of elastic tongue pieces that form a bottom portion of the lock member insertion space portion of the cart body and that have a locking projection for locking a seat plate of a caster are formed at a predetermined interval, and The cart according to claim 1, wherein a caster shaft of the caster is positioned between the elastic tongue pieces.

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