JP2018027754A - Carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carriage which enables casters to be easily fixed to a platform.SOLUTION: A carriage 10 comprises: a platform 30 which has fixing sections 40 enabling pedestals of casters to be fixed thereto; and lock members to fix the casters to the platform 30. The fixing section 40 has: an arrangement section 41 which is installed on a face 32 at the reverse side of a deck face of the platform 30 and enables the pedestal to be arranged thereon; and a regulation section 42 which includes an opposite section arranged opposite to the face 32 at the reverse side of the deck face of the platform 30 with a gap therebetween in a vertical direction of the platform 30. The lock member has an insertion section which can be inserted into a gap so as to prevent the pedestal arranged on the arrangement section 41 from being moved away from the platform 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a transport cart.

  There is known a method of attaching casters to a carrier platform using bolts and nuts. Patent Document 1 discloses an example of a transport cart to which casters can be attached as such.

Japanese Patent No. 3806251

  In order to attach the caster to the loading platform, an operator needs to insert a plurality of bolts into the base of the caster and tighten them. For this reason, there are many parts of a conveyance trolley, and the work procedure for attaching a caster to a loading platform increases.

  An object of the present invention is to provide a transport cart capable of easily attaching a caster to a loading platform.

  A transport cart that solves the above problems includes a loading platform having a mounting portion to which a pedestal of a caster can be attached, and a lock member that fixes the caster to the loading platform, and the mounting portion is opposite to the deck surface of the loading platform. An arrangement portion provided on the surface of the loading platform and capable of arranging the pedestal; and a regulating portion including a facing portion provided so as to face the surface opposite to the deck surface of the loading platform with a gap in the vertical direction of the loading platform. The locking member includes an insertion portion that can be inserted into the gap so that the pedestal arranged in the arrangement portion does not move in a direction away from the loading platform.

  According to the transport cart, the user can fix the pedestal to the mounting portion of the cargo bed by inserting the lock member into the gap between the restricting portion and the pedestal of the caster. For this reason, a caster can be easily attached to a loading platform.

  In one example of the transport carriage, the restricting portion includes a first restricting portion and a second restricting portion that are opposed to each other via the space of the attachment portion, and the insertion portion of the lock member is the first restricting portion. The first insertion part that can be inserted into the gap formed between the opposing part of the part and the pedestal, and the gap formed between the opposing part of the second restricting part and the pedestal The lock member further includes a connecting portion that connects the first insertion portion and the second insertion portion.

  According to the transport cart, the first insertion portion and the second insertion portion are connected by the connection portion, and the lock member can be configured by one member. For this reason, the operator can insert the lock member by one operation.

  In one example of the transport carriage, the first restricting portion and the second restricting portion are provided along a width direction of the cargo bed, and the mounting portion is configured to connect the pedestal to the first restricting portion and the second restricting portion. An insertion port that is open to the side of the loading platform is provided so that it can be inserted between the restriction part and the loading part.

  According to the transport cart, the first restricting portion and the second restricting portion are provided along a direction different from the front-rear direction of the transport cart. For this reason, it is difficult for the lock member to come off from the mounting portion of the cargo bed while the carriage is running.

In one example of the transport carriage, the attachment portion further includes an attachment engagement portion, and the lock member further includes a lock engagement portion engageable with the attachment engagement portion.
According to the transport cart, the lock member is difficult to come off from the mounting portion of the cargo bed, or the lock member is more stably fixed.

  The transport cart of the present invention can easily attach the caster to the loading platform.

The perspective view of the conveyance trolley of embodiment. The side view of the caster of FIG. The enlarged view of the 1st corner | angular of the back surface of FIG. FIG. 4 is a sectional view taken along line 4-4 of FIG. 3; The perspective view of a locking member. The figure which shows the state by which the caster was arrange | positioned at the arrangement | positioning part. Sectional drawing of the 4-4 line | wire state of the state in which the caster and the lock member were inserted.

(Embodiment)
With reference to FIG. 1, the structure of the conveyance trolley | bogie 10 is demonstrated. The transport cart 10 includes four casters 20, a loading platform 30, an attachment portion 40 (see FIG. 3), and a lock member 50. The loading platform 30 includes four corner members 37 and four connecting members 38. Each corner member 37 is connected by each connecting member 38 to form a loading platform 30. The material constituting the loading platform 30 is resin. The shape of the loading platform 30 in a plan view of the loading platform 30 is a rectangular shape in which the front-rear direction of the loading platform 30 corresponds to the longitudinal direction, and the width direction orthogonal to the front-rear direction corresponds to the short direction.

  A plurality of surfaces are formed on the loading platform 30. The plurality of surfaces include a deck surface 31, a back surface 32, a first side surface 33, a second side surface 34, a third side surface 35, and a fourth side surface 36. The deck surface 31 is a surface on which luggage (not shown) is placed. The back surface 32 is a surface formed on the side opposite to the deck surface 31. The first side surface 33 is a surface formed at one end 30 </ b> A in the front-rear direction of the loading platform 30. The second side surface 34 is a surface formed at the other end 30 </ b> B in the front-rear direction of the loading platform 30. The third side surface 35 is a surface formed at one end 30 </ b> C in the width direction of the loading platform 30. The fourth side surface 36 is a surface formed at the other end 30 </ b> D in the width direction of the loading platform 30.

  The loading platform 30 includes a first corner 30E, a second corner 30F, a third corner 30G, and a fourth corner 30H. The first corner 30 </ b> E is a region located between the first side surface 33 and the third side surface 35. The second corner 30 </ b> F is a region located between the first side surface 33 and the fourth side surface 36. The third corner 30 </ b> G is a region located between the second side surface 34 and the third side surface 35. The fourth corner 30 </ b> H is a region located between the second side surface 34 and the fourth side surface 36.

  Attachment portions 40 are respectively provided at the first corner 30E, the second corner 30F, the third corner 30G, and the fourth corner 30H of the back surface 32. By inserting the lock member 50 into each attachment portion 40, the base 23 of each caster 20 is fixed to the loading platform 30. The caster 20 includes a universal caster 20A and a fixed caster 20B. The universal caster 20A is attached to the first corner 30E and the second corner 30F of the back surface 32. The fixed casters 20B are attached to the third corner 30G and the fourth corner 30H of the back surface 32. As the universal caster 20 </ b> A rotates around the axis along the normal line of the back surface 32, the traveling direction of the transport cart 10 is changed. In addition, the number of the casters 20 provided in the transport cart 10, the attachment position of the casters 20, and the like can be arbitrarily changed.

  FIG. 2 is a side view of the universal caster 20A. The universal caster 20 </ b> A includes a wheel 21, an arm 22, and a pedestal 23. The pedestal 23 includes a first pedestal 24 and a second pedestal 25. The wheel 21 is grounded and supports the transport carriage 10 so as to be movable. The arm 22 supports the wheel 21 so as to be rotatable with respect to the rotation center axis 21 </ b> A of the wheel 21. The base 23 has a substantially rectangular shape and supports the arm 22. The second pedestal 25 is provided between the first pedestal 24 and the arm 22. The length of the side 25 </ b> A of the second pedestal 25 is shorter than the length of the side 24 </ b> A of the first pedestal 24. For example, a ball bearing is incorporated between the second pedestal 25 and the arm 22 of the universal caster 20A. For this reason, the 2nd base 25 can support the arm 22 rotatably.

  The fixed caster 20B does not include the second pedestal 25. The first pedestal 24 supports the arm 22 in a non-rotatable manner. The central portion of the opposite side 24 </ b> A of the first pedestal 24 is recessed toward the center of the first pedestal 24 in plan view. A pair of arms 22 are formed so as to extend from the central portion of the side 24A. The distance between the arms 22 is substantially equal to the width of the wheel 21.

  FIG. 3 shows a state in which the caster 20 and the lock member 50 are removed at the first corner 30E of the back surface 32. FIG. The back surface 32 is partitioned by ribs 32A. The attachment part 40 includes an arrangement part 41 and a restriction part 42. The placement unit 41 is provided on a part of the back surface 32 and can place the first pedestal 24. In the example shown in FIG. 3, the placement portion 41 is a virtual region formed by the ribs 32 </ b> A. The placement portion 41 is formed so as to surround the outer periphery of the first pedestal 24. The side 41A of the placement portion 41 includes a first portion 41B and a second portion 41C. The first portion 41 </ b> B is formed from the side 41 </ b> A of the placement portion 41 toward the center side of the placement portion 41.

  When the universal caster 20 </ b> A is arranged in the arrangement part 41, the side 24 </ b> A of the first pedestal 24 contacts the first portion 41 </ b> B of the side 41 </ b> A of the arrangement part 41. A gap is generated between the side 24 </ b> A of the first pedestal 24 and the second portion 41 </ b> C of the side 41 </ b> A of the placement portion 41.

  When the fixed caster 20 </ b> B is disposed on the placement portion 41, the side 24 </ b> A of the first base 24 contacts the second portion 41 </ b> C of the side 41 </ b> A of the placement portion 41. A gap is generated between the side 24 </ b> A of the first base 24 and the first portion 41 </ b> B of the side 41 </ b> A of the arrangement portion 41.

  The restricting part 42 includes a first restricting part 42A and a second restricting part 42B. The first restricting portion 42 </ b> A and the second restricting portion 42 </ b> B are provided along the width direction of the loading platform 30. The first restricting portion 42 </ b> A and the second restricting portion 42 </ b> B are opposed to each other through the space 45 in the attachment portion 40. The restricting portion 42 includes a first reinforcing portion 42C and a second reinforcing portion 42D. The first reinforcing portion 42 </ b> C is provided so as to reinforce the first restricting portion 42 </ b> A against the force applied by the base 23 in the front-rear direction of the loading platform 30. The second reinforcing portion 42 </ b> D is provided so as to reinforce the second restricting portion 42 </ b> B against the force applied by the base 23 in the front-rear direction of the loading platform 30.

  The attachment portion 40 includes an insertion port 46, an attachment engagement portion 47, a wall 48, and a fistula 49. The insertion port 46 is a portion in which a part of the loading platform 30 is cut out so that the base 23 and the lock member 50 (see FIG. 5) can be inserted between the first restricting portion 42A and the second restricting portion 42B. It is. The insertion port 46 shown in FIG. 4 is open at the third side surface 35.

  The wall 48 is provided adjacent to the first restricting portion 42A and the second restricting portion 42B. The wall 48 determines the position of the loading platform 30 in the width direction when the base 23 and the lock member 50 are inserted into the insertion port 46.

  The placement portion 41 is provided with inclined ribs 32B. The loading platform 30 is formed by injecting resin between an upper mold and a lower mold (both not shown) of the mold. Of the upper mold of the mold, the part forming the attachment portion 40 is movable along the front-rear direction of the loading platform 30. When the resin is injected and the mold is pulled up and down, the upper mold forming the mounting portion 40 is moved along the front-rear direction of the loading platform 30 from the regulating portion 42 side toward the center side of the placement portion 41. The inclined ribs 32 </ b> B are formed to enable the above movement, and are formed so that the height decreases from the restricting portion 42 side toward the center side of the placement portion 41.

  The attachment engagement portion 47 includes a first attachment engagement portion 47A, a second attachment engagement portion 47B, and a tool groove 47C. The first attachment engagement portion 47 </ b> A is a groove formed in the attachment portion 40. The second attachment engaging portion 47 </ b> B is a hole that penetrates the wall 48 or a hole that does not penetrate the wall 48. The tool groove 47C is connected to the first attachment engaging portion 47A.

  The hole 49 is a hole that penetrates the third side surface 35 or a hole that does not penetrate the third side surface 35. The eaves hole 49 opens toward the insertion port 46 and is formed to be able to engage with the eaves 54 (see FIG. 5) of the lock member 50.

  As shown in FIG. 4, each regulating portion 42 </ b> A, 42 </ b> B includes a facing portion 44. The facing portion 44 protrudes toward the space 45 in the front-rear direction of the loading platform 30. The facing portion 44 is provided so as to face the arrangement portion 41 and the loading platform 30 through the gap 43 in the vertical direction.

  The distance D between the facing portion 44 of the first restricting portion 42A and the facing portion 44 of the second restricting portion 42B is shorter than the length of the side 24A (see FIG. 2) of the first pedestal 24. The distance D between the facing portion 44 of the first restricting portion 42A and the facing portion 44 of the second restricting portion 42B is longer than the length of the side 25A (see FIG. 2) of the second pedestal 25. In another example, the distance D is the same as the length of the side 25 </ b> A of the second pedestal 25.

  As shown in FIG. 5, the lock member 50 includes an insertion portion 51, a coupling portion 52, a lock engagement portion 53, and a flange 54. The insertion portion 51 can be inserted into the gap 43 so that the pedestal 23 of the caster 20 disposed in the placement portion 41 does not move in a direction away from the loading platform 30. The material constituting the lock member 50 is resin or metal.

  The insertion part 51 includes a first insertion part 51A and a second insertion part 51B. The first insertion portion 51A can be inserted into a gap 43 formed between the facing portion 44 of the first restriction portion 42A and the pedestal 23. The second insertion portion 51B can be inserted into a gap 43 formed between the facing portion 44 of the second restricting portion 42B and the base 23.

  The connecting part 52 connects the first insertion part 51A and the second insertion part 51B. In another example, the lock member 50 does not include the connecting portion 52. When the lock member 50 includes the connecting portion 52, the first insertion portion 51A and the second insertion portion 51B are integrally formed, and the number of parts of the lock member 50 can be reduced. When the lock member 50 does not include the connecting portion 52, the first insertion portion 51A and the second insertion portion 51B can be formed separately, so that the degree of freedom in forming the lock member 50 is increased.

  The lock engagement portion 53 includes a first lock engagement portion 53A and a second lock engagement portion 53B. An example of the first lock engaging portion 53A is a claw. The first lock engagement portion 53A is provided in the connecting portion 52 and can be engaged with the first attachment engagement portion 47A of the attachment portion 40. An example of the second lock engaging portion 53B is a protrusion. The second lock engagement portion 53B is provided at the distal end of the insertion portion 51 and can be engaged with the second attachment engagement portion 47B of the attachment portion 40.

  The flange 54 is formed in the connecting portion 52. The flange 54 can be engaged with the hole 49 of the mounting portion 40. When the first lock engagement portion 53A of the lock member 50 is engaged with the first attachment engagement portion 47A of the attachment portion 40, the flange 54 restricts the lock member 50 from moving in the vertical direction of the loading platform 30. To do.

  With reference to FIG. 3, FIG. 6, and FIG. 7, the mounting operation of the caster 20 will be described. First, the operator inserts the base 23 into the insertion port 46 from the third side surface 35 that is the side of the loading platform 30. Next, the operator moves the pedestal 23 in the width direction of the loading platform 30 to contact the wall 48. Then, the worker moves the pedestal 23 toward the placement portion 41 in the vertical direction of the loading platform 30 in a state where the pedestal 23 is in contact with the wall 48, and places the placement portion 41 on the placement portion 41. The distance for moving the pedestal 23 in the vertical direction of the loading platform 30 can be arbitrarily changed. In the first example, the distance is the thickness of the first pedestal 24B. In the second example, the distance is longer than the thickness 24B of the first pedestal. In the third example, the distance is shorter than the thickness 24B of the third pedestal. In the fourth example, the operator arranges the pedestal 23 on the arrangement unit 41 without moving the pedestal 23 toward the arrangement unit 41 in the vertical direction of the loading platform 30.

  FIG. 6 shows a state in which the pedestal 23 is arranged on the arrangement part 41 of the first corner 30E. Since the first pedestal 24 is in contact with the outer periphery of the placement portion 41, the placement portion 41 restricts the pedestal 23 from moving in the width direction and the front-rear direction of the loading platform 30. Next, the operator inserts the lock member 50 into the insertion port 46 from the third side surface 35 that is the side of the loading platform 30. The operator moves the lock member 50 in the width direction of the loading platform 30 to contact the wall 48.

  FIG. 7 is a cross-sectional view of the state in which the lock member 50 is inserted. The first insertion portion 51A fills the gap 43 formed between the facing portion 44 of the first restricting portion 42A and the pedestal 23, and the second insertion portion 51B and the facing portion 44 of the second restricting portion 42B. A gap 43 formed between the base 23 and the base 23 is filled. For this reason, the movement of the base 23 in the vertical direction of the loading platform 30 is restricted. Note that the first insertion portion 51A and the second insertion portion 51B may not completely fill the gap 43. That is, there may be a slight gap between the first insertion portion 51 </ b> A and the second insertion portion 51 </ b> B and the base 23.

  Further, the first lock engagement portion 53A (see FIG. 5) of the lock member 50 engages with the first attachment engagement portion 47A (see FIG. 3) of the attachment portion 40. The claw of the first lock engagement portion 53 </ b> A is caught by the first attachment engagement portion 47 </ b> A, and the lock member 50 is difficult to be removed from the attachment portion 40.

  Further, the second lock engagement portion 53B (see FIG. 5) of the lock member 50 engages with the second attachment engagement portion 47B (see FIG. 3) of the attachment portion 40. The protrusion of the second lock engagement portion 53B is inserted into the hole of the second attachment engagement portion 47B, and the lock member 50 is fixed more stably.

  When removing the lock member 50, the operator inserts a tool into the tool groove 47 </ b> C, lifts the claw of the first lock engagement portion 53 </ b> A of the attachment portion 40, and the first lock engagement of the lock member 50. The engagement with the joint portion 53A is released. An example of a tool is a flathead screwdriver. In another example, the operator disengages by hand without using a tool.

  The operator attaches the attachment portion 40 of the second corner 30F (see FIG. 1), the attachment portion 40 of the third corner 30G (see FIG. 1), and the attachment portion 40 of the fourth corner 30H (see FIG. 1). Also, the same operation is performed to attach the caster 20 to the back surface 32 of the loading platform 30.

(Modification)
The description about the above embodiment is an exemplification of a form that the transport cart according to the present invention can take, and is not intended to limit the form. The transport cart according to the present invention can take a form in which, for example, a modification of the above-described embodiment described below and at least two modifications not contradicting each other are combined.

-The structure of the attachment engagement part 47 and the lock engagement part 53 can be changed arbitrarily.
In the first example, the first attachment engagement portion 47A is a claw, and the first lock engagement portion 53A is a recess that can be engaged with the first attachment engagement portion 47A.

  In the second example, the second attachment engagement portion 47B includes a protrusion that can be engaged with the second lock engagement portion 53B. The second lock engaging portion 53 </ b> B includes a hole that does not penetrate the lock member 50 or a hole that penetrates the lock member 50.

  In the third example, the lock engagement portion 53 does not include the second lock engagement portion 53B. The second attachment engaging portion 47 </ b> B is a protrusion that protrudes from the wall 48 toward the space 45. The second attachment engagement portion 47B can be engaged with the distal end of the first insertion portion 51A and the distal end of the second insertion portion 51B.

  In the fourth example, the transport cart 10 includes a set of the first attachment engagement portion 47A and the first lock engagement portion 53A, and the second attachment engagement portion 47B and the second lock engagement portion 53B. Including at least one of the pair.

  In the fifth example, the transport cart 10 includes a set of the first attachment engagement portion 47A and the first lock engagement portion 53A, and the second attachment engagement portion 47B and the second lock engagement portion 53B. Does not include any of the pairs.

-The structure of the base 23 and the control part 42 can be changed arbitrarily.
In the first example, the distance D between the facing portion 44 of the first restricting portion 42A and the facing portion 44 of the second restricting portion 42B is longer than the length of the side of the first pedestal 24.

  In the second example, the first restricting portion 42 </ b> A includes a groove into which the first pedestal 24 can be inserted. The operator positions the pedestal 23 above the placement portion 41 and inserts one side of the first pedestal 24 into the groove. In this state, the side opposite to the one side of the first pedestal 24 is inserted into the space 45 through the facing portion 44 of the second restricting portion 42B. Then, the first pedestal 24 is arranged on the arrangement unit 41. According to the configuration of the first example and the second example, the pedestal 23 can be inserted from above the placement portion 41 without being inserted from the insertion port 46.

  -The structure of the control part 42 can be changed arbitrarily. In the first example, the first restricting portion 42 </ b> A and the second restricting portion 42 </ b> B are provided along the front-rear direction of the loading platform 30. In the second example, the first restricting portion 42 </ b> A and the second restricting portion 42 </ b> B are provided along the width direction of the loading platform 30. When provided along the width direction of the loading platform 30, the movement direction of the transport carriage 10 and the insertion direction of the lock member 50 are different, so that the lock member 50 is difficult to be removed from the restriction portion 42.

  -The structure of the insertion port 46 can be changed arbitrarily. In the first example, the insertion port 46 opens toward the side of the loading platform 30. In the second example, the insertion port 46 opens toward the center in the front-rear direction or the width direction of the loading platform 30. When the insertion port 46 opens to the side of the loading platform 30, the lock member 50 can be easily inserted into the insertion port 46.

  -The structure of the insertion part 51 can be changed arbitrarily. When the distance D between the facing portion 44 of the first restricting portion 42A and the facing portion 44 of the second restricting portion 42B is longer than the length of the side 25A of the second pedestal 25, the first insertion portion 51A and the second The insertion portion 51 </ b> B is configured to contact the second pedestal 25. When the distance D between the facing portion 44 of the first restricting portion 42A and the facing portion 44 of the second restricting portion 42B is the same as the length of the side 25A of the second pedestal 25, the facing portion 44 becomes the second pedestal 25. The insertion part 51 does not need to contact the second pedestal 25.

  -The structure of the collar 54 and the hole 49 can be changed arbitrarily. In one example, the lock member 50 does not include the flange 54. The attachment portion 40 does not include the fistula 49.

  DESCRIPTION OF SYMBOLS 10 ... Carriage trolley, 20 ... Caster, 23 ... Pedestal, 24 ... 1st pedestal, 25 ... 2nd pedestal, 30 ... Loading platform, 31 ... Deck surface, 32 ... Back surface, 40 ... Mounting part, 41 ... Placement part, 42 ... restricting portion, 42A ... first restricting portion, 42B ... second restricting portion, 43 ... gap, 44 ... facing portion, 45 ... space, 46 ... insertion port, 47 ... mounting engagement portion, 47A ... first 47B ... second attachment engagement portion, 50 ... lock member, 51 ... insertion portion, 51A ... first insertion portion, 51B ... second insertion portion, 52 ... connection portion, 53 ... lock Engagement part, 53A ... 1st lock engagement part, 53B ... 2nd lock engagement part.

Claims (4)

A cargo bed having a mounting portion to which a pedestal of a caster can be attached;
A locking member for fixing the caster to the cargo bed,
The mounting portion is provided on a surface opposite to the deck surface of the loading platform, and is arranged to be capable of arranging the pedestal, and is opposed to a surface opposite to the deck surface of the loading platform with a gap in the vertical direction of the loading platform. A regulating portion including a facing portion provided to
The said locking member is provided with the insertion part which can be inserted in the said clearance gap so that the said base arrange | positioned at the said arrangement | positioning part may not move in the direction away from the said loading platform. The restricting portion includes a first restricting portion and a second restricting portion that face each other through the space of the attachment portion,
The insertion portion of the lock member includes a first insertion portion that can be inserted into the gap formed between the facing portion of the first restriction portion and the pedestal, and the second restriction portion. A second insertion part that can be inserted into the gap formed between the facing part and the pedestal;
The transport cart according to claim 1, wherein the lock member further includes a connecting portion that connects the first insertion portion and the second insertion portion. The first restricting portion and the second restricting portion are provided along the width direction of the cargo bed,
The transport carriage according to claim 2, wherein the attachment portion includes an insertion port that opens to a side of the cargo bed so that the pedestal can be inserted between the first restriction portion and the second restriction portion. The attachment portion further includes an attachment engagement portion,
The transport cart according to any one of claims 1 to 3, wherein the lock member further includes a lock engagement portion that can be engaged with the attachment engagement portion.

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