JP3208741U - bag - Google Patents

Abstract

[PROBLEMS] To provide a bag equipped with a caster capable of reducing impact from a wheel to improve silence and improving appearance. A bag 10 comprising a case 21 for storing articles and a caster 50 attached to the case 21 is provided. The caster 50 includes a caster head 51 extending from the case 21, and a buffer mechanism 61 provided on the caster head 51 for reducing the impact and urging the wheel 52 to the initial position. Further, the buffer mechanism 61 is provided with an inner diameter support mechanism 71 that supports the inner diameter side of the wheel 52 so as to be movable in the urging direction. The buffer mechanism 61 is provided with a first elastic member 62 and a second elastic member 66 that urge the inner diameter support mechanism 71 to the initial position in parallel. [Selection] Figure 4

Description

  The present invention relates to suitcases, trunks, and other bags that are carried for business or travel, and more particularly, to bags that are equipped with casters.

  Some cages have casters attached to facilitate movement. The cage supported by the caster may vibrate due to unevenness of the road surface or floor surface when moving, and may generate noise. Various wrinkles having a structure for reducing vibration and noise have been proposed (see, for example, Patent Document 1 (FIG. 1)).

The basic principle of the bag disclosed in Patent Document 1 will be described with reference to FIG.
As shown in FIG. 10, in the bag 100, a caster 102 is provided in a case 101 that stores articles. The caster 102 is provided with a base 103 attached to the bottom of the case 101 so that a caster head 105 can pivot via a support shaft 104, and the caster head 105 relieves shock at a position away from the support shaft 104. A buffer means 106 is provided.

  A cavity 107 extending in the vertical direction is formed in the buffering means 106, and two elongated holes 108 extending vertically are formed in the opposite side walls across the cavity 107, and the axle 109 is supported in these elongated holes 108. The bearing guide member 110 is inserted so as to be movable up and down. In the cavity 107, a first elastic member 111 is provided above the bearing guide member 110, and a second elastic member 112 is provided below the bearing guide member 110. When the wheel 113 rides on the unevenness of the road surface or floor surface while the heel 100 is moving, the bearing guide member 110 moves up and down, and the first elastic member 111 and the second elastic member 112 expand and contract, so that an impact transmitted from the wheel 113 is received. The vibration of the heel 100 is weakened to some extent.

  By the way, in recent years, in addition to the functionality of the bag, it is desired to improve the appearance due to market needs. It is preferable if the appearance of not only the main body but also the caster can be improved. However, the conventional caster 102 has a general configuration in which a normal wheel 113 is attached to an axle 109 and has poor appearance. Furthermore, it is preferable if not only the impact transmitted from the wheel 113 can be alleviated but also the quietness can be improved. For this reason, it is desired to improve the appearance of the caster while reducing the impact from the wheels to improve the noise reduction.

Utility Model Registration No. 3176328

  An object of the present invention is to provide a bag equipped with a caster that can alleviate the impact from the wheels, improve the quietness, and improve the appearance.

  The invention according to claim 1 is a bag comprising a case for storing articles and a caster attached to the case, the caster extending from the case, and a wheel provided on the caster head. A shock absorbing mechanism that relieves the shock of the wheel, an inner diameter support mechanism that is provided in the shock absorbing mechanism so as to be movable in the biasing direction and supports the inner diameter side of the wheel, and the wheel that is rotatably supported by the inner diameter support mechanism; The buffer mechanism is characterized in that a first elastic member and a second elastic member for urging the inner diameter support mechanism to an initial position are provided in parallel.

  The invention according to claim 2 is characterized in that a through-hole penetrating in the rotation axis direction is formed on the rotation center side of the inner diameter support mechanism.

  The invention according to claim 3 is characterized in that the maximum dimension of the penetrating portion in a side view of the wheel is 1/3 or more of the outer diameter of the wheel.

  The invention according to claim 4 is characterized in that the caster is pivotably provided on a pivot shaft extending vertically from the bottom of the case.

  In the device according to claim 5, the shock-absorbing mechanism is formed on the caster head and disposed on the turning shaft, and the first piston slidably provided on the first cylinder portion. And a piston base provided at the lower end of the first piston, a second cylinder part formed on the caster head and arranged in parallel with the first cylinder part, and sliding on the second cylinder part And a piston base provided at the lower end of the second piston. A part of the first elastic member is housed in the first cylinder portion, and the caster head and the piston base are provided. And the first piston is inserted, the second elastic member is housed in the second cylinder portion, and the upper wall of the second cylinder portion and the upper end portion of the second piston It provided between one piston base by a first elastic member and the second elastic member is characterized by being urged downward.

  In the invention according to claim 6, the pivot shaft is formed in a cylindrical shape so as to open to the lower end, and the first cylinder portion is formed in the caster head so as to pass through the pivot shaft and is one of the pivot shaft holes through which the pivot shaft passes. The first piston is slidably provided on the inner diameter portion. The first piston is formed in a cylindrical shape.

  In the invention according to claim 7, the inner diameter support mechanism includes an arm extending from the buffer mechanism, an annular support portion provided on the arm and formed annularly on the inner diameter side of the wheel, and an outer diameter side of the annular support portion. And a rolling element that rotatably supports the wheels.

  In the invention according to claim 8, the inner diameter support mechanism includes an arm extending from the buffer mechanism, an annular support portion provided on the arm and formed annularly on the inner diameter side of the wheel, and an outer diameter side of the annular support portion. And a bearing for rotatably supporting the wheel.

  In the device according to claim 9, the buffer mechanism includes a left arm extending to the left and a right arm extending to the right, a left inner diameter support mechanism provided on the left arm, and a right inner diameter support mechanism provided on the right arm. And a reinforcing member that spans from the left inner diameter support mechanism to the right inner diameter support mechanism is provided.

  The invention according to claim 10 is characterized in that the penetrating portion is provided with a detachable wheel cover.

  The invention according to claim 11 is characterized in that the wheel includes a flexible tire.

  According to the first aspect of the present invention, the caster includes a buffer mechanism that reduces the impact and biases the wheel to the initial position. Since the first elastic member and the second elastic member are provided in parallel in the buffer mechanism, the impact from the wheel is reduced by the two elastic members, vibration and noise are reduced, and quietness is improved. be able to. Furthermore, by arranging the first elastic member and the second elastic member in parallel, the caster can be made to appear thick and heavy, and the appearance can be improved.

  According to a second aspect of the present invention, the caster includes an inner diameter support mechanism that is provided in the buffer mechanism so as to be movable in the biasing direction and supports the inner diameter side of the wheel, and a wheel that is rotatably supported by the inner diameter support mechanism. Since the through-hole penetrating in the rotation axis direction is formed on the rotation center side of the inner diameter support mechanism, the other side can be seen from the inside of the wheel when the caster is viewed in the rotation axis direction of the wheel. Since the caster has a unique hollow shape in which the other side can be seen from the inside of the wheel, the appearance of the caster can be improved. That is, it is possible to provide a bag equipped with casters that can alleviate the impact from the wheels and improve the appearance.

  In the invention according to claim 3, the maximum dimension of the penetrating part in the side view of the wheel is not less than 1/3 of the outer diameter of the wheel. Can be improved.

  In the invention according to claim 4, since the caster is provided so as to be pivotable on the pivot shaft extending vertically from the bottom of the case, the direction of the caster can be changed according to the traveling direction of the kite.

  In the device according to claim 5, the buffer mechanism includes a first cylinder part and a second cylinder part, and the first elastic member is partially housed in the first cylinder part, The elastic member is accommodated in the second cylinder part. Since one piston base is urged downward by the first elastic member and the second elastic member, the shock from the wheel can be dispersed and absorbed by two elastic members via one piston base. it can. Further, since the two pistons slide, the two pistons can be smoothly slid compared to one piston even with an impact applied from an oblique direction.

  In the invention according to claim 6, the first cylinder portion is formed from a part of the pivot shaft hole formed through the caster head and passing the pivot shaft, and an inner diameter portion of the pivot shaft formed in a cylindrical shape. Become. Since the first piston is slidably provided on the inner diameter portion of the swivel shaft, the first piston shaft and the swivel shaft are arranged in a straight line so that the piston slides smoothly and the wheel is firmly supported. can do.

  In the invention according to claim 7, the inner diameter support mechanism includes an arm extending from the buffer mechanism, an annular support portion provided on the arm and formed annularly on the inner diameter side of the wheel, and an outer diameter side of the annular support portion. And the rolling element that rotatably supports the wheel, the hollow wheel can be supported with a simple configuration in a side view. Furthermore, the appearance of the caster can be improved by combining the arm with a hollow wheel.

  In the invention according to claim 8, the inner diameter support mechanism includes an arm extending from the buffer mechanism, an annular support portion provided on the arm and formed annularly on the inner diameter side of the wheel, and an outer diameter side of the annular support portion. And a bearing for rotatably supporting the wheel. Since a general bearing is used, assembly is facilitated, and the number of assembling steps and part costs can be reduced.

  In the device according to claim 9, the buffer mechanism includes a left arm extending to the left and a right arm extending to the right, a left inner diameter support mechanism provided on the left arm, and a right inner diameter support mechanism provided on the right arm. With. Since the reinforcing member that spans from the left inner diameter support mechanism to the right inner diameter support mechanism is provided, the left and right wheels of a so-called twin wheel caster can be reinforced and supported stably. Furthermore, a brand logo etc. can be stamped on the reinforcing member.

  In the device according to claim 10, a detachable wheel cover is provided in the penetrating portion. Various design wheel covers can be exchanged and attached, and the appearance can be improved.

  In the device according to claim 11, the wheel includes a flexible tire. Silence can be further improved by using a tire made of a material that is more flexible than a conventional material.

It is a side view of a bag according to the present invention. It is a principal part enlarged view of the bag of FIG. It is a front view of the caster concerning the present invention. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. 1 is an exploded perspective view of an inner diameter support mechanism and wheels according to the present invention. It is an effect | action figure of the caster which concerns on this invention. It is sectional drawing of the caster which concerns on another aspect of FIG. It is a figure explaining attachment of the wheel cover concerning the present invention. It is a figure explaining the basic composition of a prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the bag 10 includes a main body side case 21 for storing articles, a lid side case 22 attached to the main body side case 21 via a hinge, and a main body side. The case 21 is provided with an extendable handle 11 that can be pulled out.

  In the upper part of the case 21 on the main body side, a portable upper grip 12 is provided separately from the extendable handle 11 so as to be swingable, undulating or pulling out. Further, a side grip 13 for carrying is provided on the side of the case 21 on the main body side so as to be swingable, undulating or pulling out. Note that the shape of the upper gripping portion 12 and the shape of the side gripping portion 13 are not limited to the shapes of the embodiments, but may be fixed, and other general handles can be used as long as they can be gripped by hand. Even if it is a shape, it does not interfere. Further, the side grip 13 may be omitted.

  A base 31 is attached to the bottom 23 of the cases 21 and 22, and a caster 50 is attached to the base 31. When the caster 50 is attached at the lower part of the cases 21 and 22, the extendable handle 11 is located at the upper back of the case 21 on the main body side, and by pulling out the extendable handle 11 and holding it by hand, the bag 10 Can be towed. In addition, by installing the caster 50 on the floor surface or the road surface 91, it is possible to make the bag 10 stand on its own, hold the upper gripping part 12 by hand, and move the bag 10.

  As shown in FIGS. 2 and 3, the case 21 on the main body side includes a bottom 23 and a side wall 24 that rises from the outer periphery of the bottom 23 in a state where the bag 10 is self-supporting. A concave portion 25 that is recessed upward is formed at a corner portion of the case 21 on the main body side, a base 31 is provided so as to fit into the concave portion 25, and a caster 50 is provided on the base 31.

  For convenience, the caster 50 attached to the main body side case 21 via the base 31 will be described. However, since the lid side case 22 has the same configuration, the description of the lid side case 22 will be omitted hereinafter. To do.

  The caster 50 includes a caster head 51 that extends downward from the base 31 and a buffer mechanism 61 that is provided on the caster head 51 and reduces the impact from the wheels 52 and biases the wheels 52 to the initial position. Further, the buffer mechanism 61 is provided with an inner diameter support mechanism 71 that supports the inner diameter side of the wheel 52 so as to be movable in the urging direction, and the wheel 52 is rotatably provided on the inner diameter support mechanism 71.

  On the rotation center side of the inner diameter support mechanism 71, a penetrating portion 72 penetrating in the rotation axis direction is formed. Since the penetrating portion 72 is formed, when the caster 50 is viewed in the direction of the rotation axis of the wheel 52, the other side can be seen from the inside of the wheel 52. Since the caster 50 has a unique hollow shape in which the other side can be seen from the inside of the wheel 52, the appearance of the caster 50 can be improved.

  The through portion 72 is formed in a circular shape in a side view of the wheel, and the dimension D1 of the through portion 72 is 1/3 or more of the outer diameter D2 of the wheel 52. Along the diameter of the wheel 52, a dimension L1 from the outer periphery of the wheel 52 to one end of the penetrating part 72, a dimension D1 of the penetrating part 72, and a dimension L2 from the other end of the penetrating part 72 to the outer periphery of the wheel 52 are L1 = D1. By setting = L2, the thickness of the wheel 52 and the size of the penetrating portion 72 can be made the same, and the appearance can be improved.

  Furthermore, by setting the dimensions so that L1 = L2 <D1, the penetrating portion 72 can be made larger. By making the penetration part 72 appear larger, the wheel 52 can be made conspicuous and the appearance of the caster 50 can be further improved.

  As shown in FIG. 4, a recess 25 is formed in the bottom 23 of the case 21 on the main body side, and a base 31 is disposed so as to fit into the recess 25, and the base 31 is fastened to the bottom 23 by a first fastening member 41. Has been.

  A counterbore hole 32 is provided at the center of the base 31, and a turning shaft 53 of the caster head 51 is inserted into the counterbore hole 32 from below, and the turning shaft 53 is fastened to the base 31 by a retaining ring 42 from above. The turning shaft 53 is provided with a flange portion 54, and the position of the turning shaft 53 is regulated by the flange portion 54 coming into contact with the base 31.

  The swivel shaft 53 extends substantially vertically from the case 21 on the main body side via the base 31. Since the caster 50 is provided so as to be able to turn on a turning shaft 53 extending vertically from the bottom 23 of the case 21, the direction of the caster 50 can be changed according to the traveling direction of the basket 10.

  The caster 50 includes a turning shaft 53 provided on the base 31, a caster head 51 provided on the turning shaft 53 so as to be turnable, a buffer mechanism 61 provided integrally with the caster head 51, and the buffer mechanism 61. The inner diameter support mechanism 71 is provided so as to be vertically movable, and the wheel 52 is rotatably supported by the inner diameter support mechanism 71.

  As shown in FIGS. 4 and 5, the buffer mechanism 61 is provided with a first elastic member 62 and a second elastic member 66 that urge the inner diameter support mechanism 71 to the initial position in parallel. Specifically, the buffer mechanism 61 is formed on the caster head 51 and disposed on the turning shaft 53, and a first piston slidably provided on the first cylinder portion 63. 64 and a piston base 65 provided at the lower end of the first piston 64.

  Further, the buffer mechanism 61 is formed on the caster head 51 and arranged in parallel with the first cylinder portion 63, and a second cylinder portion 67 is slidably provided on the second cylinder portion 67. 2 pistons 68 and a piston base 65 provided at the lower end of the second piston 68.

  A part of the first elastic member 62 is housed in the first cylinder portion 63, provided between the caster head 51 and the piston base 65, and the first piston 64 is inserted therethrough. The second elastic member 66 is housed in the second cylinder portion 67 and is provided between the upper wall 67 a of the second cylinder portion 67 and the upper end portion 68 a of the second piston 68. One piston base 65 is urged downward by such a configuration, that is, by the first elastic member 62 and the second elastic member 66.

  The turning shaft 53 is formed in a cylindrical shape so as to open to the lower end, and the first cylinder portion 63 is formed so as to penetrate the caster head 51 and a part 56 of the turning shaft hole 55 through which the turning shaft 53 passes. The first piston 64 is provided on the inner diameter portion 57 so as to be slidable.

  A groove is formed at the lower end of the turning shaft 53, and a seat and retaining ring 58 is provided in the groove. A part 56 of the turning shaft hole 55 is enlarged in diameter, and a seat and retaining ring 58 is in contact with a step portion of the enlarged diameter part. For this reason, the caster head 51 is prevented from falling off the turning shaft 53. The upper end of the first elastic member 62 is in contact with this washer. The lower end portion of the first piston 64 is fitted into the pedestal portion 65 a of the piston base 65. By fitting the first piston 64 into the pedestal portion 65a, the first piston 64 can be firmly supported.

  The second piston 68 is provided so as to rise from the piston base 65, and a long hole 68 b is formed in the second piston 68. The second fastening member 43 fastened to the caster head 51 is inserted into the long hole 68b.

  Since the second fastening member 43 is fastened to the caster head 51, the position with respect to the caster head 51 is not changed, but when the second piston 68 slides, the second fastening member 43 is within the range of the long hole 68b. Moves relative to each other. For this reason, the 2nd piston 68 can move in the range of the long hole 68b. When the upper end of the long hole 68b contacts the second fastening member 43, the piston base 65 is prevented from falling off.

  By adopting such a configuration, one piston base 65 is biased downward by the first elastic member 62 and the second elastic member 66, so that one piston base 65 receives an impact from the wheel 52. The two elastic members 62 and 66 can be dispersed and absorbed. Further, since the two pistons 64 and 68 slide, the two pistons 64 and 68 can be smoothly slid even in the case of an impact applied from an oblique direction as compared with the case of one piston. it can.

  Since the first piston 64 is slidably provided on the inner diameter portion 57 of the turning shaft 53, the shaft of the first piston 64 and the turning shaft are arranged in a straight line so that the sliding of the piston is smooth. Can be firmly supported.

  Thus, since the caster 50 is provided with the buffer mechanism 61 that reduces the impact and biases the wheel 52 to the initial position, the impact from the wheel 52 can be reduced and vibration and noise can be reduced.

  As shown in FIGS. 5 and 6, the inner diameter support mechanism 71 includes left and right arms 73 extending from the lower portion of the second piston 68 of the buffer mechanism 61, and left and right arms provided at the tips of these left and right arms 73. Left and right annular support portions 75 formed annularly on the inner diameter side of the wheel 52 and rolling elements 76 provided on the outer diameter side of the left and right annular support portions 75 to rotatably support the left and right wheels 52. I have. The inner diameter support mechanism 71 has a symmetrical configuration with the second piston 68 as a center.

  By supporting the inner diameter side of the wheel 52 with the arm 73, the hollow wheel 52 having a hollow shape in a side view can be configured simply. Further, the appearance of the caster can be improved by the combination of the wheels having the hollow shape of the arm 73.

  The annular support portion 75 includes an inner regulating wall 77 that restricts the wheel 52 and the rolling element 76 from moving inward in the axial direction, and a rolling element recess 78 that houses the rolling element 76. A wheel 79 that restricts the wheel 52 and the rolling element 76 from moving outward in the axial direction is provided on the outer side in the axial direction of the annular support part 75, and the wheel 79 is fastened to the annular support part 75 by a third fastening member 81. ing.

  The wheel 79 includes an inner diameter cylindrical portion 79a that fits into the inner diameter of the annular support portion 75, and a restriction flange portion 79b that extends in the radial direction of the wheel 52 from one end of the inner diameter cylindrical portion 79a. The wheel 52 includes an annular rim 59 disposed on the outer diameter side of the rolling element 76 and a tire 74 fitted on the outer diameter side of the rim 59. A convex fitting portion 59a is provided on the outer diameter side of the rim 59, and a tire 74 is fitted to the fitting portion 59a.

  In the embodiment, the tire 74 is a relatively hard synthetic resin. However, the present invention is not limited to this, and the tire 74 may be a flexible rubber or a synthetic resin. The quietness can be further improved by using a tire 74 made of a material that is more flexible than the conventional material.

  As described above, the caster 50 includes the inner diameter support mechanism 71 that supports the wheel 52 having the penetrating portion 72 and the buffer mechanism 61 that reduces the impact from the wheel 52 having the penetrating portion 72. As a result, it is possible to provide the bag 10 provided with the casters 50 that can alleviate the impact from the wheel 52 and improve the quietness and appearance.

  The buffer mechanism 61 includes a left arm 73 extending to the left and a right arm 73 extending to the right, a left inner diameter support mechanism 71 provided on the left arm 73, and a right inner diameter support mechanism 71 provided on the right arm 73. And a reinforcing member 82 is provided so as to span from the left inner diameter support mechanism 71 to the right inner diameter support mechanism 71. Specifically, the reinforcing member 82 is provided so as to span from the left inner regulating wall 77 to the right inner regulating wall 77. By providing the reinforcing member 82, the support of the left and right wheels 52 of a so-called twin wheel caster can be reinforced and the caster 50 can be moved stably. Further, a brand logo 82a or the like can be stamped on the reinforcing member 82.

Next, the operation of the caster 50 described above will be described.
FIG. 7A is a view showing a state in which the position of the piston base 65 is at the lower end, and downward movement of the upper end portion of the long hole 68 b of the second piston 68 is restricted by the second fastening member 43. A gap is formed above the second piston 68 and above the first piston 64. When the wheel 52 rides on the convex portion 92 while moving on the road surface 91, the piston base 65 rises as shown by the arrow (1).

  FIG. 7B is a diagram showing a state in which the piston base 65 is lifted. When the piston base 65 is lifted, the first elastic member 62 and the second elastic member 66 are contracted to reduce the impact from the wheel 52. . The vertical position of the caster head 51 is not substantially changed, and the impact on the case 21 is also reduced. Further, since the two elastic members 62 and 66 of the first elastic member 62 and the second elastic member 66 are provided, the impact from the wheel 52 is dispersed and mitigated, and vibration and noise are reduced to reduce noise. Can be improved.

  Since the two pistons 64 and 68 slide, the two pistons 64 and 68 can slide smoothly even in the case of an impact applied from an oblique direction as compared with the case of one piston. Can do. Further, since the first piston 64 is slidably provided on the inner diameter portion 57 of the turning shaft 53, the shaft of the first piston 64 and the turning shaft 53 are arranged in a straight line so that the piston 64 slides. It is possible to smoothly support the wheel 52. As a result, vibration and noise of the kite 10 can be further reduced.

Next, another aspect of the inner diameter support mechanism 71 shown in FIG. 5 will be described.
As shown in FIG. 8, the inner diameter support mechanism 71 includes left and right arms 73 extending from the piston base 65 of the buffer mechanism 61, and an annular shape on the inner diameter side of the wheel 52 provided at the distal ends of these left and right arms 73. An annular support portion 75 formed and a bearing 83 provided on the outer diameter side of the annular support portion 75 and rotatably supporting the wheel 52 are provided.

  Since the bearing 83 is a general bearing 83 including an inner ring, a rolling element, and an outer ring, the component cost can be reduced. Further, an inner ring of the bearing 83 is provided on the outer diameter side of the annular support portion 75, and a rim 59 is provided on the outer ring of the bearing 83. Since a general bearing 83 is used, the assembly becomes easy and the number of assembling steps can be reduced.

Next, another aspect of the caster 50 will be described.
As shown in FIG. 9A, the inner diameter support mechanism 71 is provided with a notch 84 on the inner side of the through hole 72. A claw 86 is provided on the wheel cover 85 separate from the casters 71. The wheel cover 85 is sized to block the penetration part 85, and the claw 86 is provided at a position where it can be inserted into the penetration part 85. The wheel cover 85 can be attached to the caster 71 by engaging the claw 86 with the notch 84.

  As shown in FIG. 9B, a detachable wheel cover 85 is provided in the penetrating portion. The wheel cover 85 of various designs can be exchanged and attached, and the appearance can be improved.

  In addition, although the Example demonstrated the caster 50 provided in the case 21 of the main body side, the caster 50 provided in the case 22 of the lid | cover side is also the same structure. Further, although the elastic members 62 and 66 are compression springs, the present invention is not limited to this, and any elastic material such as rubber may be used. In the embodiment, the bag is a suitcase. However, the bag is not limited to this. A trunk or the like may be used, and any other general bag may be used as long as the baggage can be stored and moved by a caster.

  The present invention is suitable for a bag equipped with casters.

10 ... 鞄 21 ... Body side case 22 ... Cover side case 23 ... Bottom 50 ... Caster 51 ... Caster head 52 ... Wheel 53 ... Swivel axis 57. .. Inner diameter part 61 ... Buffer mechanism 62 ... First elastic member 63 ... First cylinder part 64 ... First piston 65 ... Piston base 66 ... Second elasticity Member 67 ... Second cylinder part 68 ... Second piston 71 ... Inner diameter support mechanism 72 ... Penetration part 73 ... Left and right arms 74 ... Tire 75 ... Annular support part 76 ... Rolling elements 82 ... Reinforcement members 83 ... Bearings 85 ... Wheel covers D1 ... Dimensions of the penetrating part D2 ... Wheel outer diameter

The invention according to claim 1 is a bag comprising a case for storing articles and a caster attached to the case, the caster extending from the case, and a wheel provided on the caster head. a buffer mechanism for mitigating the shock, the inner diameter support mechanism for supporting the inner diameter side of the wheel movably provided to the biasing direction in the buffer mechanism, and the wheel is rotatably supported on the inner diameter support mechanism The buffer mechanism is characterized in that a first elastic member and a second elastic member for urging the inner diameter support mechanism to an initial position are provided in parallel.

Claims (11)

A bag made up of a case for storing articles and a caster attached to the case,
The caster includes a caster head extending from the case, a buffer mechanism provided on the caster head to reduce the impact of the wheel, and the buffer mechanism movably provided in the biasing direction. An inner diameter support mechanism for supporting, and the wheel rotatably supported by the inner diameter support mechanism,
The hook is characterized in that a first elastic member and a second elastic member for urging the inner diameter support mechanism to an initial position are provided in parallel to the buffer mechanism.   2. The scissors according to claim 1, wherein a through-hole penetrating in the rotation axis direction is formed on the rotation center side of the inner diameter support mechanism.   The bag according to claim 1 or 2, wherein a maximum dimension of the through portion in a side view of the wheel is not less than 1/3 of an outer diameter of the wheel.   The scissor according to any one of claims 1 to 3, wherein the caster is pivotably provided on a pivot shaft extending vertically from a bottom of the case. The buffer mechanism is
A first cylinder part formed on the caster head and disposed on the pivot shaft, a first piston slidably provided on the first cylinder part, and a lower end of the first piston A piston base provided;
A second cylinder portion formed on the caster head and arranged in parallel with the first cylinder portion; a second piston slidably provided on the second cylinder portion; and The piston base provided at the lower end of the piston,
A part of the first elastic member is housed in the first cylinder part, provided between the caster head and the piston base, and the first piston is inserted therethrough,
The second elastic member is housed in the second cylinder portion, and is provided between an upper wall of the second cylinder portion and an upper end portion of the second piston,
The scissors according to claim 4, wherein one piston base is biased downward by the first elastic member and the second elastic member. The pivot shaft is formed in a cylindrical shape so as to open to the lower end,
The first cylinder part is formed by penetrating the caster head and includes a part of a turning shaft hole through which the turning shaft passes, and an inner diameter part of the turning shaft formed in a cylindrical shape,
6. The rod according to claim 5, wherein the first piston is slidably provided on the inner diameter portion.   The inner diameter support mechanism includes an arm extending from the buffer mechanism, an annular support portion provided on the arm and formed annularly on the inner diameter side of the wheel, and an outer diameter side of the annular support portion provided to rotate the wheel. The scissors according to any one of claims 1 to 6, further comprising a rolling element that can be supported.   The inner diameter support mechanism includes an arm extending from the buffer mechanism, an annular support portion provided on the arm and formed annularly on the inner diameter side of the wheel, and an outer diameter side of the annular support portion provided to rotate the wheel. The scissors according to claim 1, further comprising a bearing that can be supported. The buffer mechanism includes a left arm extending to the left and a right arm extending to the right, the left inner diameter support mechanism provided on the left arm, and the right inner diameter support mechanism provided on the right arm. With
9. The scissors according to claim 7, further comprising a reinforcing member that extends from the left inner diameter support mechanism to the right inner diameter support mechanism.   The scissors according to claim 2, wherein a detachable wheel cover is provided in the penetrating portion.   The said wheel is equipped with the flexible tire, The scissors of any one of Claims 1-10 characterized by the above-mentioned.

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