JP5501433B2 - Bag casters - Google Patents

Description

  The present invention relates to a bag caster. For example, the bag caster is attached to the bottom of a carry bag, a trunk, a suitcase, etc., and shocks transmitted to the bag are buffered to smoothly move, and the baggage packed in the bag is damaged. It is easy to manufacture and assemble and is robust in structure, and is excellent in maintenance and management and easy to clean.

  Conventionally, for example, as a shock-absorbing wheel assembly that suppresses the transmission of external shocks to fragile devices in a bag, between a first position and a second position in a wheel housing attached to the lower edge of the bag The column member is pivotally mounted so as to be movable, and a spring member made of a shock absorbing coil spring is interposed between the wheel housing and the column member, and a part of the column member extends outside the wheel housing. Thus, there was a wheel assembly in which a wheel member was rotatably attached. In the wheel assembly, when the wheel member is tilted and pulled by the bag, the wheel member engages and rotates with the surface, and the bag can run along the surface. Further, the support member is vertically aligned when the bag is tilted and pulled and when the support member moves between the first position and the second position (see, for example, Patent Document 1).

JP 2001-178520 A

  However, the conventional wheel assembly described in Patent Document 1 is often used for assembly work in which a spring member made up of a shock-absorbing coil spring is interposed between the wheel housing and the column member in manufacture and assembly. It took time and effort, and production and assembly were not easy.

  Further, the shock absorbing coil spring may be detached from between the wheel housing and the support member when an excessive force is applied due to an excessive shock.

  In addition, dust and muddy water during rainy weather easily enter the buffer wheel assembly, and cleaning cannot be performed easily. And when mud and dirt are clogged up with a coil spring, there was a possibility that the elasticity of a coil spring could not be exhibited smoothly and reliably.

  The present invention solves the above-mentioned conventional drawbacks, is excellent in shock-absorbing property to shock shock transmitted to the bag body, prevents damage to the baggage packed in the bag body, and reliably protects it, and is manufactured and assembled. The purpose is to provide a bag caster that is easy to construct, robust in structure, easy to maintain, easy to clean, and has a novel and smart appearance, and is inexpensive to manufacture. To do.

In the invention according to claim 1 of the present invention, the support member that is attached to the seat surface of the bottom portion of the bag body and rotatably supports the wheels of the caster is formed of a synthetic resin or a metal flexible material,
The support member is provided between the seating surface and the rotating shaft of the wheel, and is bent and stretched in the vertical direction and is formed by bending and bending, and the bending and stretching wall portion. A wall portion continuously provided at both ends of the C-shape and surrounding the outer periphery of the C-shape of the bent and stretched wall portion,
Between the bent and stretched wall portion and the wall portion, there is provided a hole portion that is formed by thinning the support member and surrounded by the wall portion,
The impact transmitted to the bag body is buffered by the bending and stretching of the bending and stretching wall portion.

According to the invention described in claim 1 of the present invention, the bearing member is formed by a flexible material of a synthetic resin or metal that rotatably supports a wheel of the caster with mounted on the seating surface of the bottom portion of the bag body, wherein The support member is provided between the seat surface and the rotating shaft of the wheel, and is bent and stretched in the vertical direction and is formed by being bent and continuously formed on the bend and stretch wall portion. And a wall portion surrounding the periphery of the bending / stretching wall portion. Between the bending / stretching wall portion and the wall portion, the support member is thinned and surrounded by the wall portion. Since the impact transmitted to the bag body is buffered by the bending and stretching of the bending and stretching wall portion, the bending and stretching wall portion exhibits elasticity when the bag body is pulled. The shock transmitted to the bag body is effectively buffered. It is. And the baggage packed in the bag body is prevented from being damaged, and is securely protected. In addition, since the support member is formed of a synthetic resin or a metal flexible material for both the buffering means, the manufacture and assembly are easy and the structure is robust, and the manufacturing cost is low. Furthermore, since the buffer means is exposed to the outside, it is excellent in maintenance and management and easy to clean. Furthermore, a new and smart bearing member can be obtained in appearance.

FIG. 1 is a perspective view showing Embodiment 1 of a bag caster according to the present invention. FIG. 2 is a longitudinal sectional view showing the caster portion. FIG. 3 is also a horizontal sectional view. FIG. 4 is a longitudinal sectional view showing another modification of the first embodiment. FIG. 5 is a side view showing a reference example 1 of a bag caster. FIG. 6 is also a longitudinal sectional view. FIG. 7 is a longitudinal sectional view showing Reference Example 2 of the bag caster. FIG. 8 is an exploded perspective view. FIG. 9 is a perspective view showing a third example of the bag caster in which the wheels are housed. FIG. 10 is a perspective view of the usage state where the wheels are exposed. FIG. 11 is a cross-sectional view showing a state where the wheel is housed. FIG. 12 is a cross-sectional view of the usage state where the wheels are exposed. FIG. 13 shows a reference example 4 of a bag caster, and is a bottom view in a state where wheels are housed. FIG. 14 is also a longitudinal sectional view. FIG. 15 is a perspective view of the usage state in which the wheels are also exposed. FIG. 16 shows a reference example 5 of a bag caster, and is a front view of a use state in which wheels are exposed. FIG. 17 is a side view of the same. 18 is a cross-sectional view taken along the line II in FIG. FIG. 19 is also a longitudinal sectional view. FIG. 20 is a perspective view of a bag caster according to a sixth example of use, with the wheel exposed. FIG. 21 is also a longitudinal sectional view. FIG. 22 is a cross-sectional view showing a state where the wheel is housed. FIG. 23 shows a reference example 7 of a bag caster, and is a perspective view of a use state in which a wheel is exposed. FIG. 24 is also a longitudinal sectional view. FIG. 25 shows a reference example 8 of a bag caster, and is a perspective view showing a state in which wheels are stored. FIG. 26 is a perspective view of the usage state where the wheel is exposed. FIG. 27 is a front view showing another modified example of wheel spokes in a bag caster. FIG. 28 is a front view showing a second modified example of wheel spokes in a bag caster.

  The details of the present invention will be described below according to the best mode for carrying out the present invention with reference to the drawings.

<Embodiment 1>
1 is a perspective view showing Embodiment 1 of a bag caster according to the present invention, FIG. 2 is a longitudinal sectional view showing the caster portion, FIG. 3 is a horizontal sectional view, and FIG. 4 is a longitudinal sectional view showing another modification. FIG.

  In the first embodiment, the support member 4 for rotatably supporting the wheel 3 of the caster A attached to the bottom portion 2 of the bag body 1 is formed of a synthetic resin or a metal flexible material. 1 and 2 that can be expanded and contracted in the vertical direction Y on one side of the rear side with respect to the traveling direction X, or thin and bent that are bent several times as in the modification shown in FIG. The wall portion 5 is provided with a buffer means 7 formed of a synthetic resin or a metal flexible material below the seat surface 6.

  Examples of the bag body 1 include a carry bag, a trunk, a suitcase, and the like, to which a handle 8 is attached to be extendable as shown in FIG. Reference numeral 9 denotes a rotating shaft for rotatably supporting the wheel 3.

  In the first embodiment, the support member 4 is a bracket for supporting the wheel 3, and the hole portion 10 is a wall portion 4 </ b> A around the support member 4 in order to sufficiently exhibit the buffer function by the buffer means 7. It is formed so as to be surrounded by. Further, four support members 4 are attached to the bottom of the bag body 1 on the bottom of the bag body 1 so as to be rotatable around the axis of the support shaft S using a support shaft S installed vertically.

  Examples of the synthetic resin include polyacetal resin, polyurethane resin, polycarbonate resin, polyethylene resin, polyamide resin, polyvinyl chloride resin, melamine resin, polypropylene resin, A.I. B. Examples thereof include S resin and biodegradable resin. Examples of the metal include aluminum, stainless steel, and steel.

  The first embodiment is configured as described above, and the support member 4 for supporting the wheel 3 provided at the lower portion of the seat surface 6 of the bottom portion 2 of the bag body 1 is formed of a synthetic resin or a metal flexible material. 1 and 2 which can be expanded and contracted in the vertical direction Y on one side, or a buffer comprising a bent and stretched wall portion 5 which is bent several times as shown in FIG. Since the means 7 is provided, when the handle body 8 is gripped and the bag body 1 is pulled, the bending / extension wall portion 5 exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered.

  At this time, the buffer means 7 is formed on one side of the back side of the support member 4 surrounded by a synthetic resin or metal flexible material around the hole portion 10 with respect to the traveling direction X of the wheel 3. Therefore, depending on the difference in the situation such as the traveling direction and inclination of the bag body 1, the load of the baggage packed in the bag body 1, the unevenness of the road surface, etc. 1 and 2 formed on one side surface of the support member 4 surrounded by a synthetic resin or metal flexible material with the hole 10 as the center, as shown in FIG. 1 and FIG. 2, or as shown in FIG. The buffer means 7 composed of the bent and stretched wall portion 5 bent several times exhibits a stretchability and freely changes to buffer the impact. At this time, as shown in FIG. 4, the bent wall portion 5 is formed several times more than the one having the single bent wall portion 5 as shown in FIGS. 1 and 2. Efficiently demonstrates the buffer function.

  Therefore, in the conventional baggage bag cushioning wheel assembly described in Patent Document 1, a shock absorber coil is provided in which a spring member made of a shock cushioning coil spring is interposed between the wheel housing and the column member. Unlike the case where an excessive force is applied to the spring due to excessive impact, the bent wall portion 5 exhibits elasticity and the bag body 1 is unlikely to come off between the wheel housing and the support member. The shock transmitted to can be buffered reliably.

  Further, as described above, the support member 4 for supporting the wheel 3 is integrally formed with the buffer means 7 made of the bent and stretched wall portion 5 on one side surface by a synthetic resin or metal flexible material. As in the conventional baggage wheel cushioning wheel assembly described in 1), it is not necessary to interpose a spring member made of a shock-absorbing coil spring between the wheel housing and the column member. Manufacture and assembly can be easily performed without much time and effort.

  Moreover, the support member 4 for supporting the wheel 3 is formed by integrally forming the buffer means 7 formed of the bent wall portion 5 on one side surface by a synthetic resin or metal flexible material as described above, and is exposed to the outside. However, it can effectively exhibit a buffer function when it rains, and like the buffer wheel assembly described in Patent Document 1, mud water, dust, etc. enter the coil spring and become clogged when it rains, so that the buffer function is not hindered. .

  Since the buffer means is exposed to the outside, it can be easily cleaned just by washing with water, it is excellent in maintenance and management, and is easy to clean. Furthermore, a new and smart bearing member can be obtained in appearance.

  In this way, the luggage (not shown) packed in the bag body 1 is prevented from being damaged and reliably protected. Further, since the support member 4 is formed of a synthetic resin or a metal flexible material for both the buffer means 7, it can be manufactured in large quantities, is easy to manufacture and assemble, is robust in structure, and is low in manufacturing cost. Become.

< Reference Example 1 >
5 and 6 show Reference Example 1 of a bag caster. The reference example 1 is characterized in that the bent and stretched wall portion 5 is formed as a torsion bar 11 having an upward gradient that receives the load W from the bag body 1 on the free end side 11a.

In this way, the torsion bar 11 having an upward slope that receives the load W from the bag body 1 on the free end side 11a at the lower portion of the seat surface 6 as the buffer means 7 of the support member 4 for supporting the wheel 3 is a flexible material made of synthetic resin or metal. Since it is formed of a material, when the bag body 1 is pulled, the torsion bar 11 exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. In this reference example 1 , the torsion bar 11 secures a desired length L, so that the load W from the bag body 1 is entirely received via the torsion bar 11, and the buffering means 7 is totally buffered. This is more advantageous than the first embodiment in that it is effectively received. And the baggage which is not shown in the figure packed in the bag main body 1 is prevented from being damaged, and is reliably protected. Further, since the support member 4 is also made of a synthetic resin or a metal flexible material for the buffer means 7, it is easy to manufacture and assemble and is robust in structure, and the manufacturing cost is low. Moreover, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Furthermore, the same configuration and operation as the first embodiment, which is novel and smart in appearance, are exhibited.

< Reference Example 2 >
Further, FIG. 7, and as shown in FIG. 8 is a reference example 2. In this reference example 2 , an axle 21 is rotatably mounted in a wheel housing 20 attached to the lower surface of the bag body 1, and the axle 21 is provided with a main shaft portion 21A and wheels 3, 3 at both left and right ends of the main shaft portion 21A. Is formed by crank-shaped wheel mounting shaft portions 21B and 21B that are eccentrically mounted so that the wheels 3 and 3 can be moved in and out of the wheel housing 20 by rotating the axle 21. It is provided.

And in the reference example 2 , the support member 4 which rotatably supports the wheels 3, 3 of casters attached to the bottom 2 of the bag body 1 is a spoke, and the spoke 22 is formed of a synthetic resin or a metal flexible material. At the same time, the bending / extension part 5 ′ in which the spoke 22 is bent so as to be stretchable in the vertical direction Y is formed, so that the impact transmitted to the bag body 1 is effectively exerted by the bending / extension part 5 ′. Buffered. Reference numeral 23 denotes a substantially U-shaped locking member for restraining the axle 21 at a predetermined position when the wheels 3 and 3 are extended from the wheel housings 20 and 20, and this locking member 23 is a flexible composite. A spring-like mounting portion 23a formed of resin and having one end pivoted downward in the wheel housings 20 and 20 and bent several times on the upper side is formed. Reference numeral 24 denotes a resting leg used when resting the movement of the bag body 1, and one end is pivotally attached to one side of the lower surface of the bag body 1 so as to be able to be tilted.

In the reference example 2 , when the axle 21 is rotated, the wheels 3 and 3 attached to the crank-like wheel attachment shafts 21 </ b > B and 21 </ b > B can freely move in and out of the wheel housing 20. The spoke 22 as the support member 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material is provided with a bending / extending portion 5 'that can be expanded and contracted in the vertical direction. When the bag is pulled, the bent portion 5 'exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. At this time, since the bending portion 5 'as the buffer means is formed on the spoke 22, the impact directly received by the wheels 3, 3 can be effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Furthermore, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Furthermore, the same configuration and operation as those of the first embodiment and the reference example 1 in which the support member 4 including the shock-absorbing means 7 which is novel and smart in appearance can be obtained are exhibited.

< Reference Example 3 >
9 to 12 show Reference Example 3 of a bag caster. In this reference example 3 , the storage section 30 provided in the bracket B attached to the lower surface of the bag main body 1 is provided with a substantially quadrant cross section. Since the wheel housings 32, 32 having a peripheral edge are pivotally attached to the wheel housings 32, 32, the wheels 3, 3 provided in the wheel housings 32, 32 so as to be rotatable are provided so as to be movable in and out of the bracket B. It is characterized by that.

Then, the wheel housings 32, 32 are rotated by holding the operation lever 31, so that the wheels 3, 3 provided in the wheel housings 32, 32 appear and disappear from the bracket B. Thus, the spoke 22 as the support member 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material formed in the lower portion of the seat surface 6 is provided with a bending portion 5 that can expand and contract in the vertical direction Y. Therefore, when the bag body 1 is pulled, the bending / extension part 5 'exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Furthermore, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Further, the same configuration and operation as in Reference Example 2 can be obtained, in which the support member 4 including the shock-absorbing means 7 which is novel and smart in appearance can be obtained.

< Reference Example 4 >
13 to 15 show a reference example 4 of a bag caster. In this reference example 4 , the base end mounting portions 40a of the left and right leg portions 40 on which the wheels 3 and 3 are rotatably provided are pivotally attached to the bracket B provided on the lower surface of the bag body 1 and locked. By pressing the button 41 against the spring force of the spring portion 41a, a locking portion 41b provided on the peripheral surface of the lock button 41 is provided so as to be lockable to the leg portion 40 and capable of being unlocked, One end of the operating lever 42 is pivotally attached to the base end mounting portion 40a, and the operating lever 42 is provided so as to be engageable with a locking pin body 43 provided facing the leg portion 40. The wheels 3 and 3 are provided so as to be able to appear and retract with respect to the wheel storage portions 30 and 30.

In the fourth reference example , when the lock button 41 is pushed against the spring force of the spring portion 41 a to release the lock of the lock button 41 and the operation lever 42 is rotated, the operation lever 42 is provided. The left and right leg portions 40, 40 accommodated in the bracket B are opened. A spoke 22 as a support member 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material formed in the lower portion of the seating surface 6 is provided with a bending portion 5 that can expand and contract in the vertical direction Y. Therefore, when the bag body 1 is pulled, the bending / extension part 5 'exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Furthermore, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Further, the same configuration and operation as those of Reference Example 2 and Reference Example 3 in which the support member 4 having the shock-absorbing means 7 that is novel and smart in appearance can be obtained are obtained.

< Reference Example 5 >
16 to 19 show Reference Example 5 of a bag caster. In the reference example 5 , a pair of left and right wheel accommodating portions 50, 50 are provided on the lower surface of the bag body 1, and arcuate guide holes 51, 51 provided in the left and right side walls 50a, 50b of the wheel accommodating portions 50, 50. The rotary shafts 9 and 9 of the wheels 3 and 3 are slidably fitted in 51 and 51, and the shaft body 53 provided at the free end of the projecting piece 52 protruding in the radial direction R on the rotary shaft 9; A base ring portion 54a of the torsion spring 54 is fitted, and the torsion spring 54 locks one spring leg 54b to the side edge of the projecting piece 52 and the other spring leg 54c to the wheel housing parts 50, 50. By engaging, an outward urging force is applied to the wheels 3, 3, and an operation lever 56 having its upper end exposed from the window hole 55 so as to be externally operable can be turned into the wheel housing portions 50, 50. A hook-like locking portion 56 a provided at the tip of the operation lever 56 is engaged with and disengaged from the projecting piece 52. It is characterized in that the wheels 3 and 3 are provided so as to be able to appear and retract with respect to the wheel housing portions 50 and 50 by being provided as possible.

In Reference Example 5 , when the operation lever 56 is rotated during use to disengage the engaging portion 56a of the operation lever 56 from the protruding piece 52, the spring force of the torsion spring 54 causes the wheels 3, 3, the rotary shafts 9 and 9 are automatically guided to the outside from the wheel housing portions 50 and 50 by being guided and moved into the arc-shaped guide holes 51 and 51; 51 and 51 provided in the left and right side walls 50 a and 50 b. Exposed. Further, when the wheels 3 and 3 exposed to the outside are pushed into the wheel housing portions 50 and 50 against the urging force of the torsion spring 54 when not in use, the rotating shafts 9 and 9 Guided and moved in arcuate guide holes 51, 51; 51, 51 provided in the left and right side walls 50a, 50b, the wheels 3, 3 are accommodated in the wheel accommodating portions 50, 50, and the locking portion of the operation lever 56 56a is locked to the projecting pieces 52 provided in the radial direction R on the rotating shafts 9 and 9 of the wheels 3 and 3, and is restrained from inadvertently jumping out of the wheel housing portions 50 and 50.

A spoke 22 as a support member 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material formed in the lower portion of the seat surface 6 is provided with a bending portion 5 that can expand and contract in the vertical direction Y. Therefore, when the bag body 1 is pulled, the bending / extension part 5 'exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Furthermore, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Further, Reference Example 2 to the same configuration as in Reference Example 4 of the bearing member 4 provided with a smart buffering means 7 is novel in appearance is obtained, cause an effect.

< Reference Example 6 >
20 to 22 show Reference Example 6 of a bag caster. In the reference example 6 , a pair of left and right wheel accommodating portions 50, 50 are provided on the lower surface of the bag body 1, and oval guide holes 60 provided on the left and right side walls 50a, 50b of the wheel accommodating portions 50, 50 are provided. The slider 63 provided outside the sliding plate 62 installed in the diameter direction of the rotating shaft cylinder 61 into which the rotating shafts 9 and 9 of the wheels 3 and 3 are rotatably inserted is slidable. In addition to loose insertion, at least the left and right outer sliders 63 are slidable to the outside through the guide holes 60, 60 provided in the outer walls of the wheel housing portions 50, 50, and the upper end 64a can be externally operated. An operation lever 64 having a substantially L-shaped side faced from the window hole 65 is pivotally mounted in the wheel housing portions 50, 50, and a locking portion 64b provided at the tip of the operation lever 64 is provided in the above-described manner. Provided in a locking recess 66 provided on the upper edge of the sliding plate 62 so as to be detachable and provided at the tip of the sliding plate 62 By disposing the eccentric spring material 68 between the locking portion 62a and the mounting member 67 provided in the wheel housing portions 50, 50, the wheels 3, 3 are attached to the wheel housing portions 50, 50. It is characterized by being provided freely.

In Reference Example 6 , when the engagement of the locking portion 64b with respect to the locking recess 66 is released by rotating the operation lever 64, the guide spring 60 slides in the guide hole 60 by the biasing force of the eccentric spring material 68. The wheels 3 and 3 are automatically exposed to the outside from the wheel accommodating portions 50 and 50 via the sliding plate 62 having the sliding element 63 to be guided. When the wheels 3, 3 exposed to the outside are pushed into the wheel receiving portions 50, 50 against the biasing force of the biasing plate spring 68, the slider 63 moves to the left and right side walls. Guided and moved into guide holes 60 provided in 50a and 50b, the wheels 3 and 3 are accommodated in the wheel accommodating portions 50 and 50, and the locking portion 64b of the operating lever 64 is provided on the upper edge of the sliding plate 62. It is locked in the locking recess 66.

  A spoke 22 serving as a support member 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material formed in the lower portion of the seat surface 6 is provided with a bending portion 5 'that can be expanded and contracted in the vertical direction. Therefore, when the bag body 1 is pulled during use, the bending / extension part 5 'exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Furthermore, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management, and can be easily cleaned by washing with water. Furthermore, the bearing member 4 having the shock-absorbing means 7 which is novel and smart in appearance can be obtained.

23 and 24 show Reference Example 7 of a bag caster. In this embodiment, the wheel housing portions 50, 50 are provided on the lower surface of the bag body 1, and the other end of the operation lever 70 having a substantially cross-sectional arc shape with the upper end 70a facing the window hole 71 so as to be externally operable in a stepping manner, for example. Is attached to the outer periphery of a shaft cylinder 72 into which the rotating shafts 9 and 9 having wheels 3 and 3 attached at both ends are fitted, and the shaft cylinder 72 is radially mounted with one end pivotally attached to the top surface of the wheel housing portions 50 Formed at the other end of the arm 73 extending to R, the wheels 3 and 3 are accommodated in the wheel accommodating portions 50 and 50 so as to be rotatable via the arm 73, and the shaft cylinder 72 and the wheel accommodating portion 50 are accommodated. , 50 and the inner side of the lower end thereof, by interposing both ends 74a, 74b of the eccentric spring material 74 formed in a plane U shape by a metal wire material, the wheels 3, 3 are accommodated in the wheel. It is characterized in that it is provided so as to be able to appear and retract with respect to the parts 50 and 50.

Then, according to Reference Example 7 , when the operating lever 70 is rotated by, for example, stepping on the operating lever 70 during use, when the engaging portion 70b is disengaged, the eccentric spring material 74 that is curved is curved. The arm 73 is rotated clockwise in FIG. 24 with one end pivotally attached to the top surface of the wheel accommodating portion 50, 50 by the urging force accompanying the return of the wheel. And exposed to the outside from the wheel accommodating portions 50, 50. When the wheels 3, 3 exposed to the outside are pushed against the urging force of the eccentric plate spring 74 when the wheels 3, 3 are pushed into the wheel accommodating portions 50, 50 when not in use, the wheels are accommodated. By rotating the arm 73 to the old position in the portions 50, 50, the wheels 3, 3 are accommodated, and the locking portion 70b of the operating lever 70 is locked to the lower surface of the bag body 1 to return to the old position. .

Also in the reference example 7 , the spokes 22 as the support members 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material formed in the lower part of the seat surface 6 are vertically expanded and contracted. Since the possible bending / extending part 5 'is provided, when the bag body 1 is pulled, the bending / extending part 5' exhibits elasticity and the shock transmitted to the bag body 1 is effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Moreover, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Furthermore, a bearing member having a shock-absorbing means 7 that is novel in appearance and smart can be obtained.

25 and 26 show Reference Example 8 of bag casters. In the reference example 8 , a pair of left and right wheel accommodating portions 50, 50 are provided on the lower surface of the bag body 1, and the wheels 3, 3 can be tilted through the leg plates 80, 80 in the wheel accommodating portions 50, 50. A pair of the leg plates 80, 80 are pivotally attached to each other, and a resting leg / operating lever 81 is pivotably attached to the front side (the rear side in the figure) of the intermediate portion of the leg plates 80, 80 so as to be able to be tilted. The suspension leg / operating lever 81 includes a pair of leg plates 80, 80 having a lower end 82 a pivotally attached to the inner side of the pair of leg plates 80, 80, and an operating arm 82, 82 having a substantially vertical cross section. A lower end 83a is pivotally mounted at a substantially middle portion on the inner side, and an upper end 83b is guided and moved between guide plates 84 and 84 provided in the front and rear direction substantially at the center in the wheel housing portions 50 and 50. And connecting members 85, 85 slidably arranged on the left and right of the guide plates 84, 84. Characterized by providing retractably said wheels 3,3 with respect to the wheel housing portion 50, 50 by the.

In Reference Example 8 , when the resting leg / operating lever 81 is tilted up and down, the resting arm / operating lever 81 slides between the guide plates 84 and 84 and slides on the upper end in the front-rear direction and the connecting member. The wheels 3 and 3 attached to the leg plates 80 and 80 connected to each other by the 85 and 85 and opened and closed via the left and right operating arms 82 and 82 are opened and closed in and out of the wheel housing portions 50 and 50.

  When the bag body 1 is pulled, the spoke 22 as the support member 4 for supporting the wheels 3 and 3 formed of a synthetic resin or a metal flexible material has a bending portion that can expand and contract in the vertical direction Y. Since 5 'is provided, when the bag body 1 is pulled at the time of use, the bending / extension part 5' exhibits elasticity and the impact transmitted to the bag body 1 is effectively buffered. And it is prevented that the package packed in the bag main body 1 is damaged, and is protected reliably. Further, since the spokes 22 are made of a synthetic resin or a metal flexible material for the buffer means 7, the production and assembly are easy and the structure is robust, and the production cost is low. Furthermore, since the buffer means 7 is exposed to the outside, it is excellent in maintenance and management and easy to clean. Furthermore, the bearing member 4 having the shock-absorbing means 7 which is novel and smart in appearance can be obtained.

  FIG. 27 shows another modification of the spoke for supporting the wheel 3 rotatably in the bag caster. In this modification, the spoke 22 has a small ring bent portion 5'B that is bent in an up-and-down direction Y in the large ring portion 5'A that supports the wheel 3 with the axle portion 5'C as a center. By arranging a plurality of equiangular angles (five in the figure), the whole is formed into a flower shape, that is, a plum flower shape.

And in this modification, when the bag main body 1 is pulled at the time of use, when the impact from the outside is applied to the bent portions 5'B of the plurality of small wheels due to the load W or unevenness of the road surface, the stretchability is exhibited. The above-described Reference Example 2 is effective except that the impact is distributed to the bends 5'B of the plurality of small wheels by being deformed into an elliptical shape so that the impact is effectively buffered and the resilience is excellent. Thru | or a structure similar to the reference example 8, and an effect | action.

  FIG. 28 shows a second modification of the spoke for rotatably supporting the wheel 3 in the bag caster. In this modified example, the spoke 22 has a petal-like bent portion 5'B bent in such a manner that it can be expanded and contracted in the vertical direction Y in the large wheel portion 5'A that supports the wheel 3, with the axle portion 5'C as a center. The whole is formed into a flower shape by being continuously installed.

In this modification, when the bag body 1 is pulled during use, the plurality of petal-like bent portions 5'B exhibit elasticity when external impact is applied by the load W or unevenness of the road surface. In addition to the above-described Reference Example 2 to Reference Example, the impact is distributed to the plurality of petal-like bent portions 5'B and effectively buffered by being deformed into an elliptical shape, and has an excellent restoring property. This is the same configuration and action as FIG.

In the first embodiment and the reference examples 1 to 8 , the caster of the bag has been described. However, this is a representative example, and the present invention is not limited to this. For example, a chair, a desk, a bookshelf. The present invention is also applicable to casters for furniture such as furniture, casters for luggage vehicles for carrying baby cars and luggage, and front wheels of wheelchairs.

  The present invention is excellent in shock absorbing property that shocks transmitted to the bag body, prevents damage to the baggage packed in the bag body, and protects it securely, and is easy to manufacture and assemble and is robust in structure. Furthermore, it is excellent in maintenance and management, is easy to clean, and has a novel and smart appearance, and is suitable for applications and functions that are inexpensive to manufacture.

DESCRIPTION OF SYMBOLS 1 Bag main body 2 Bottom part 3 Wheel 4 Bearing member 5 Bending / extending wall part 5 'Bending / extending part 6 Seat surface 7 Buffering means 9 Rotating shaft 22 Spoke A Caster X Traveling direction Y Vertical direction

Claims (1)

A support member that is attached to the seat surface of the bottom of the bag body and rotatably supports the wheels of the caster is formed of a synthetic resin or a metal flexible material,
The support member is provided between the seating surface and the rotating shaft of the wheel, and is bent and stretched in the vertical direction and is formed by bending and bending, and the bending and stretching wall portion. A wall portion continuously provided at both ends of the C-shape and surrounding the outer periphery of the C-shape of the bent and stretched wall portion,
Between the bent and stretched wall portion and the wall portion, there is provided a hole portion that is formed by thinning the support member and surrounded by the wall portion,
The bag caster, wherein an impact transmitted to the bag body is buffered by bending and stretching of the bending and stretching wall portion.

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