JPH08244617A - Cart - Google Patents

Abstract

PURPOSE: To shorten a prop simply by rotating the rotating part of an operation conversion means by the turning movement of a hand clip and sliding a sliding part and operating the engagingly locking operation means connected to the sliding part and only turning over a wrist grasping the hand clip. CONSTITUTION: The rotating part 4a of an operation conversion means 4 is displaced and rotated by the turning movement of a hand clip 60 toward its periphery direction and a sliding part 4b is risen. The sliding rod 3a connected to the end 58b of a connecting rod 58 is slided by being pulled from the connecting rod 58 like this and is contacted with engaging pieces 5, 5 by the replacement of a retreat part 3ad to a contact part 3aa, when the connecting rod 58 is moved upward against the energizing of a spring 8. Thereby, a part projected outside from through holes 6, 6 forcibly can be retreated. At this time, the engaging pieces 5, 5 can be retreated from receiving parts 7, 7 due to no back push and the engagingly locking state between an inside pipe 40 and outside pipe 30 is released and the inside pipe 40 is stored in the outside pipe 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cart such as a carry cart or a shopping cart.

[0002]

2. Description of the Related Art Conventionally, carts are often used to carry luggage and other heavy or bulky luggage.
This is because a pair of wheels are provided on the loading platform (loading section) to support the side of the load placed on the loading platform from above the loading platform and also to support the handle (the part that is gripped by the hand when pushing the cart). It is provided with a pillar.

As such a cart, one in which the above-mentioned support column expands and contracts is widely used in consideration of portability when not in use and space saving when stored. Recently, it has been found that the strut has been devised so that it can be easily expanded and contracted. Below, such an example (actual fairness 4-2)
No. 132).

FIG. 15 is a partial front view showing a pair of struts in a stretched state with one side in section, and FIG.
FIG. 15 is a sectional view taken along the line II-II in FIG. 15, and FIG. 17 is a front view in an expanded state in which the entire hand cart is partially broken and omitted.
FIG. 18 is also a side view, and the loading section 10 has a base 16 on which wheels 12 are supported on the left and right sides and a pair of pipe supporting sections 14 are erected, and an arrow with the folding shaft 18 as a rotation center. It can be folded by rotating in the direction. A pair of proximal end pipes 20 are inserted into and fixed to the pair of pipe support portions 14, and sleeps 24 integrally formed on the left and right of the carrying grip 22 are capped and fixed to the upper end portions of the proximal end pipes 20. A first locking hole 26 is formed in the side wall of the. The first locking hole 26 corresponds to the position of the escape space 28 formed in the sleep 24. Further, in the intermediate pipe 30 which is externally fitted to the base end side pipe 20 and is slidable, the first pin hole 32 is provided at the lower end portion corresponding to the first locking hole 26 of the base end side pipe 20, and the upper end portion is provided. Second locking hole 34
Has been established. Then, the first of the intermediate pipe 30
In the pin hole 32 and the first locking hole 26 of the proximal pipe 20,
The lock pin 36 with the first flange is fitted in a state in which the piano wire or the like is bent by the first spring 38 in a spring-biased state. Further, the tip pipe 40, which is fitted onto the intermediate pipe 30 and is slidable, has a second pin hole 42 at the lower end portion corresponding to the second locking hole 34 of the intermediate pipe. A lock release fitting 44, a second spring 46, and a second lock pin 48 with a flange are provided inside the lower end portion of the tip pipe 40.
4 and the second locking hole 34 of the intermediate pipe 30.
The lock pin 48 with the second flange is urged in the inserting direction by a second spring 46 formed by bending a piano wire or the like.

The lock releasing metal fitting 44 has a C-shaped cross section perpendicular to the longitudinal direction, and has second parallel cam edges 54 on both sides of the elongated slot 50 for sliding contact with the flange portion of the lock pin 48 with the second flange. The lock pin 3 with the first collar is formed on the lower end.
A first parallel cam edge portion 56 is formed to sneak under the collar of 6 and to be retracted against the first spring 38. Further, one end of a connecting rod 58 inserted into the tip pipe 40 is connected to the upper end portion of the lock release fitting 44.
A cap 62 connected by a handle clip 60 is capped on the upper end portion of the tip pipe 40, and the connecting rod 58 is spring-biased downward between the inner surface of the cap and the other end portion of the connecting rod 58. The spring 64 is interposed. Then, in the horizontal direction below the handle grip 60 where it can be held with one hand together with the handle grip 60, it enters the tip pipe 40 through the elongated hole 66 formed in the tip pipe 40 along the axial direction, and both ends are A movable handle 68 connected to the connecting rod 58 is provided. Both ends of the movable handle 68 are covered with an operation grip 72 that is integrated with a tubular portion 70 that is slidably fitted onto the tip pipe 40. still,
Reference numeral 80 in the figure denotes a support column constituted by the base end side pipe 20, the intermediate pipe 30, and the tip end pipe 40. Although not shown, each pipe is provided with a retaining member.

Next, the operation of contracting the support column 80 of the cart will be described. First, the handle grip 60 and the operation grip 72 are grasped with one hand, and the operation grip 72 is pulled toward the handle grip 60 while applying a downward force. As a result, the movable handle 6 in the operation grip 72 is
8 moves upwards along slot 66 and against spring 64. Since the movable handle 68 is connected to the connecting rod 58, the connecting rod 58 can be pulled upward by moving upward. Then, the lock release fitting 44 connected to the connecting rod 58 moves upward. By this movement, the second parallel cam edge 54 of the unlocking metal fitting 44 retracts the second flanged lock pin 48 against the elastic force of the second spring 52, and the middle of the tip end of the second flanged lock pin 48. The engagement of the second locking hole 34 of the pipe 30 is released, and the tip pipe 40 is housed in the intermediate pipe 30 by the force pressing downward. The first parallel cam edge 56 at the lower end of the unlocking metal fitting 44 and the flange of the first locking pin 36 and the intermediate pipe 30 is about to be stored in the intermediate pipe 30. The lock pin 36 with the first flange is retracted against the elastic force of the first spring 38 by penetrating between the inner walls of the first lock pin 36. As a result, the front end of the lock pin 36 with the first flange and the first locking hole 2 of the base end side pipe 20.
The engagement with 6 is released, the intermediate pipe 30 is housed in the proximal pipe 20, and the support column 80 contracts. On the other hand, when the column 80 in the contracted state is extended, each pipe is extended by simply holding the handle grip 60 and pulling it upward, and is biased by the first spring into the first locking hole. The lock pin 36 with the first flange is fitted, and the lock pin 48 with the second flange, which is spring-biased by the second spring, is fitted into the second locking hole 34 and locked. In addition, when the support 80 is contracted and the load carrying unit 10 is folded, the carrying grip 22 is carried.

According to the conventional cart constructed as described above, the prop can be extended and locked by simply grasping the handle grip and pulling it in the extension direction, and the handle grip and the movable handle can be grasped with one hand. If the movable handle is pulled toward the handle grip with the grip force and given downward,
The lock can be released to retract the stanchion. Therefore, the operation using both hands, such as performing the lock release operation with the conventional one hand and applying the contracting force with the other one hand, is eliminated, and the support column can be contracted by the operation with one hand.

[0008]

However, in the above-mentioned cart, the handle grip 60 and the operation grip 72 provided separately from the handle grip 60 are provided.
Both of them must be grasped with one hand, and the operation grip 72 must be pulled toward the handle grip 60 while applying downward force, which was very troublesome. This is because when the cart is folded, it is necessary to once open the finger that has been hung on the handle grip 60, hang the fingertip on the operation grip 72 again, and re-grip so that both the handle grip 60 and the operation grip 72 are grasped. Because. Even an ordinary person feels the troublesomeness of the above operation, but the inconvenience as described above becomes particularly noticeable for a person having a small hand or a person having a weak grip. The present invention is intended to solve the above problems.

[0009]

A cart according to the first invention of the present application comprises a loading section 10, wheels 12, 12, a handle grip 60, and columns 80, 80 for supporting the handle grip 60. Each of the support columns 80, 80 includes a plurality of pipes 30, 40 having different diameters. The support column 80 contracts by stacking the pipes and expands by unrolling the stacked pipes 40, and the pipes 30, 40 expand as appropriate. The following constitution is adopted in the cart having the locking means 2 for maintaining the locked state and the locking operation means 3 for releasing the locked state of the locking means 2 by sliding along the column 80. It is a thing. The handle grip 60 is
At least a part of it is rotatable with respect to its own circumferential direction r. The column 80 or the handle grip 60 includes a motion conversion unit 4 that converts a rotational motion into a linear motion.
The motion converting means 4 includes a rotating part 4a that performs a rotary motion and a sliding part 4b that performs a linear motion. The rotating portion 4a rotates together with the rotation of the handle grip 60 to slide the sliding portion 4b. The sliding portion 4b is connected to the locking operation means 3.

The cart according to the second invention of the present application is the above-mentioned first invention.
In the cart according to the invention, the column 80 includes at least three pipes of the proximal end side pipe 20, the intermediate pipe 30, and the distal end pipe 40 in the order of the diameter.
The tip pipe 40 is provided with a handle grip 60. The locking means 2 locks the tip pipe 40 and the intermediate pipe 30. The intermediate pipe 30 and the pipe 20 on the base end side capable of accommodating the intermediate pipe 30 and the second locking means 102 for maintaining the extended state and the locking means 2 by sliding along the support column 80. Second locking operation means 103 for releasing the locked state of the second locking means 102 for releasing the locked state. A pressing means for pressing the second locking operation means 103 is provided at an appropriate position below the tip pipe 40 including the locking means 2 and the locking operation means 3.

A cart according to a third invention of the present application is the above-mentioned first invention.
Alternatively, in the cart according to the second aspect of the present invention, the loading section 1
0 is axially fixed to the pipe 20 located closest to the base end side, and is foldable with respect to the pipe 20. The load carrying section 10 is formed with a rotation locking section that engages the most proximal end side pipe 20 and maintains an opened state from the pipe 20. Locking release means for the rotary locking portion is provided below the pipe connected to the most proximal end side pipe 20.

A cart according to a fourth invention of the present application is the above-mentioned first invention.
Alternatively, in the cart according to the second or third aspect of the invention, the locking means 2 and the second locking means 102 are provided on inner pipes accommodated in other pipes, respectively. And, an appropriate number of engaging elements inside each of the inner pipes,
It has a proper number of through holes provided on the outer peripheral surface of the inner pipe, and a receiving portion provided at a position overlapping the through hole of the outer pipe when the pipe is stretched. The locking operation means 3 and the second locking operation means 103 each have a sliding rod, and each of the sliding rods has an engaging element so that a part of the engaging element protrudes from the through hole to the outside. An abutting portion that abuts and a retracted portion that is retracted from the abutting portion are formed side by side in the sliding direction of the sliding rod. By abutting on the abutting portion of the sliding rod, the engaging element projects a part of the surface from the through hole to the outside, and the projecting portion of the engaging element enters the receiving portion and the inside pipe and the outside The pipes are locked and both pipes are maintained in a stretched state. The sliding rod receives the sliding movement of the motion converting means 4 or the pressing portion provided with another pipe, and the retracting portion replaces the abutting portion, so that the portion protruding from the through hole 6 of the engaging member to the outside can be retracted. Therefore, the inner pipe can be housed inside the outer pipe.

[0013]

In the cart according to the first aspect of the present invention, the handle grip 60 can be rotated in the circumferential direction r while holding the handle grip 60 by returning the wrist. Then, by rotating the handle grip 60, the rotating portion 4a of the motion converting means 4 is rotated to cause the sliding portion 4b to slide. At this time, the locking operation means 3 connected to the sliding portion 4b can be operated.
That is, by simply returning the wrist of the hand holding the handle grip 60, it is possible to easily shrink the support 80 without having to carry it around again.

The cart according to the second invention of the present application is the above-mentioned first invention.
The same effect as the cart according to the invention can be obtained. In particular, with respect to the column 80 having three or more pipes 20, 30, 40 having different diameters, the locking of the locking means 2 is released by returning the wrist of the hand holding the handle grip 60, and the handle grip is held as it is. When the distal end pipe 40 is housed in the intermediate pipe 30 as described above by pushing 60 toward the proximal end side of the support column 80, the sliding action of the distal end pipe 40 is utilized to move the next intermediate pipe 30 to the proximal end pipe 2
The work of storing in 0 can be performed at the same time.

The cart according to the third invention of the present application is the above-mentioned first invention.
Alternatively, the same operation as the cart according to the second invention can be obtained.
Furthermore, the load carrying section 10 can also be folded, further improving portability.

A cart according to a fourth invention of the present application is the above-mentioned first cart.
Alternatively, the same operation as the cart according to the second or third invention can be obtained. In addition to this, the outer pipe and the inner pipe can be engaged with each other by a relatively simple structure using an engaging element.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1, 2, 3 and 4 show the entire cart according to the present invention. As shown, the main body 1 of this cart
The load mounting unit 10, an appropriate number of wheels 12, 12, a handle grip 60, and an appropriate number of struts 80, 80 supporting the handle grip 60 and capable of expanding and contracting. Each of the columns 80 has a plurality of pipes 2 having different diameters.
It is equipped with 0, 30, 40. The support 80 is contracted by stacking the pipes 30 and 40 (FIG. 4), and the support 80 is extended by feeding out one of the pipes 30 and 40 accommodated in another pipe 30. This is the state (FIGS. 1 and 2). Pipe 3
0 and 40 have locking means 2 for maintaining the stretched state, and locking operation means 3 for releasing the locked state of the locking means 2. The locking operation means 3 is activated by receiving a force from the other inside the pipe, and the locking means 2
To release the locked state. Compared with the conventional carts shown in FIGS. 21 and 22, the cart of the embodiment shown in FIGS. 1 to 4 does not have an operation grip 72 in appearance, is structurally fixed to the handle grip 60, and serves as the support column 80. Except that the mechanism of the locking means and the locking operation means of the pipe is different, the external appearance and structure of other parts (for example, the loading section 10 and its folding structure, the positions of the wheels 12, 12, etc.) are large. It does not change. 14, 16, 1
As described above, reference numerals 8 and 22 respectively indicate the pipe support portion, the base body, the folding shaft, and the carrying grip. Incidentally, F indicates the front of the cart and B indicates the rear of the cart. The configuration of each unit will be described below in order.

As shown in FIG. 5, the handle grip 60 is a rod-shaped member having a length in a substantially horizontal direction, and both ends 60
a and 60a are the end pipes 40 and 4 of the columns 80 and 80 (
The handle grip 60 is pivotable in 0) and is rotatable in the circumferential direction r thereof.

The support column 80 is formed from the bottom to the pipe 20 on the base end side.
, A pipe 30 in the middle, and a pipe 40 at the tip end, are formed by three pipes having different diameters (FIGS. 1 and 2). Of these, the proximal end pipe 20 has the largest diameter, and the intermediate pipe 30 has the next largest diameter. Tip pipe 40
Has the smallest diameter. Therefore, the intermediate pipe 30 is accommodated inside the proximal end pipe 20, and the distal pipe 20 is accommodated inside the intermediate pipe 30. The number of pipes that form one support column 80 is not limited to the above three, and two or three or more pipes can be used.

Left and right struts 80, 8 extending substantially vertically
No. 0 tip pipes 40, 40 are provided with short pipes 41, 41 that bend in a substantially horizontal direction at their tip portions (upper end portions). As shown in FIG. 5, the two short tubes 41, 41 are bent in a state where their tip portions are aligned with each other, and a handle grip 60 is interposed therebetween. The handle grip 60 is a rod-shaped body having a substantially horizontal length. And both ends 60a, 60a are the tip pipes 4 of the columns 80, 80.
The short pipes 41, 41 of the 0, 40 are axially fixed to the tips of the short pipes 41, 41, respectively, and are rotatable in the circumferential direction r.

More specifically, as shown in FIG. 6, the outer periphery of the tip end portion 41a of the short tube 41 has a collar-shaped portion 41b having a larger outer diameter than the others. End 6 of handle grip 60
0a has a receiving recess 60c for receiving the tip 41a of the short tube 41 so that the outer periphery of the tip 41a of the short tube 41 can be covered. A groove 60d is formed on the inner peripheral surface of the receiving recess 60c.
The brim-shaped part 41b of the tip part 41a of the short pipe 41 is fitted. On the contrary, it is also possible to form the collar portion 41b on the handle grip 60 side and form the groove 60d on the short pipe 41 side. The handle grip 60 is
It is suitable that the lower surface 60b on which the finger is placed is formed of an elastic member such as rubber or vinyl so as to prevent slipping (FIG. 5).

An example most suitable for forming the receiving recess 60c and the lower surface 60b of the handle grip 60 is shown in FIG.
Show to. As shown in the drawing, the handle grip 60 has an upper half portion formed by a sheath-shaped body 60e formed in a state in which a tubular body is split in half. A rubber, which is formed in a substantially columnar shape, is formed in the center portion (with respect to the longitudinal direction) of the sheath-like body 60e.
A finger grip member 60f made of vinyl or another elastic material is inserted. This finger hook member 6
The portion of the 0f sheath-shaped body 60e exposed to the outside forms the lower surface 60b of the handle grip 60. The width in the longitudinal direction of the finger holding member 60f formed in the substantially cylindrical shape is
It is assumed that the longitudinal width of the sheath-shaped body 60e is smaller than that of the sheath-shaped body 6e.
When 0e is attached to the central portion, spaces 60i, 60i are secured at both ends of the sheath 60e. This space 60
i and 60i are cylindrical half-divided like the sheath 60e,
The space 60i is covered with small sheath members 60j and 60j having a longitudinal width equal to that of the space 60i. As a result, the above-mentioned receiving recess 60c is formed. Therefore, in the case of the embodiment shown in FIG. 6, as shown in FIG. 7, the groove 60d is formed on the inner peripheral surface of the sheath 60e in which the spaces 60i, 60i are provided and the inner peripheral surfaces of the small sheath members 60j, 60j. Form.

Further, as shown in FIG. 8, step portions 60k and 60k which come into contact with the edge of the sheath 60e are formed on the side surface of the finger-holding member 60f which is formed in a substantially columnar shape (see FIG. 8).
(It shows a central vertical cross section of the handle grip 60 of FIG. 7). As a result, the finger-holding member 60f attached to the sheath-shaped body 60e does not drop off or shift from the sheath-shaped body 60e even if a force is applied from the outside when the handle grip 60 is used, Caused by the rim,
It is possible to eliminate the step between the surface of the sheath-shaped body 60e and the surface of the finger-holding member 60f, and to provide a smooth handle that does not feel uncomfortable when grasped.

It should be noted that when the cart user grips the handle grip 60, the sheath 6 is provided so that the user's hands will not slip easily.
It is appropriate to form undulations 60g and 60h on the outer peripheral surface of 0e and on the exposed surface of the finger hook member 60f at appropriate positions.

As shown in FIG. 6, FIG. 7 and FIG. 8, the substantially columnar finger hook member 60f has a rod 60m penetrating along the central length thereof. 60m rod is 60m at both ends
a and 60 ma are projected from both ends of the sheath-shaped body 60 e (only one end portion 60 ma is drawn in FIGS. 6 and 7 for convenience of drawing). The rod 60m is formed integrally with the handle grip 60. That is, the rod 60m
Is integrated with the finger hook member 60f, and the finger hook member 6
When a force is applied to 0f, the protrusion 60mb is provided near the center of the surface so as not to be displaced with respect to the finger grip member 60f.
Are formed (FIG. 8). Then, the finger rest member 60
When the rod 60m of f is passed through, a recess 60n that fits into the protrusion 60mb is formed in a portion corresponding to the protrusion 60mb. By fitting the protruding portion 60mb and the recessed portion 60n, the rod 60m is moved relative to the finger hook member 60f.
Without shifting, as a part of the handle grip 60,
It is integrated with the handle grip 60. A plurality of protrusions 60mb may be provided along the length of the rod 60m, and the recess 60n may be formed as a groove for receiving all the protrusions 60mb. In particular, the recess 6
If 0n is formed as a groove reaching both ends of the finger hooking member 60f, a rod 60m to the hooking member 60f can be produced at the time of manufacturing.
It is convenient because it can be installed smoothly. As shown in FIG. 7, when the sheath-shaped body 60e and the small sheath members 60j, 60j have a partition wall 60p that serves as a stopper for restricting the shift of the hanging member 60f in the longitudinal direction, the partition wall 60p is
A hole (notch) 60s for passing the rod 60m is provided. As shown in FIG. 5 and FIG. 9, the handle grip 60 formed as described above is turned around the circumferential direction r from the front of the cart to the rear with respect to the column 80 by returning the wrist gripping the handle. It is possible to move.

The above-mentioned short pipes 41, 41 located near the handle grip 60, that is, at both ends of the handle grip 60.
Is provided with a motion converting means 4 therein for converting rotational motion of a piston crank mechanism or the like into linear motion (FIG. 6).
And the tip pipe 4 provided with the short pipes 41, 41
A connecting rod 58, which is a long strip of wire or the like, is slidable along the longitudinal direction inside 0, 40. The configuration around the operation conversion means 4 will be described below.

The motion converting means 4 comprises a rotating portion 4a which serves as a crank and a sliding portion 4b which serves as a piston. More specifically, the rotating portion 4a is a protrusion provided on the end surface of the rod 60m end portion 60ma, as shown in FIGS. 6 and 7. As shown in FIG. 7, the rotating portion 4a has a rod 60m.
It is formed at a position eccentric from the center x of the (handle grip 60). The state of the handle grip 60 when it is used to push a cart carrying luggage,
That is, in the state shown in FIG. 8, the rotating portion 4a is located at a low position (for example, a position lower than the center x. However, in the above state, it is not always necessary to be provided at a position lower than the center x, and the highest position H of the end face of the rod 60m is set. It may be formed at any position other than (FIG. 7). Then, by rotating the handle grip 60 in the circumferential direction r, that is, by bringing the handle grip 60 into the state shown in FIG.
a moves to a position higher than the lower position (it does not have to be the position H).

As shown in FIGS. 6 and 10, the sliding portion 4b is formed in a substantially columnar shape as a whole, and the upper portion thereof is formed in a half-split shape and has a flat portion 4ba. This plane part 4
ba is the end portion 60m of the rod 60m inside the short pipe 41.
It faces the a side. Further, the flat surface portion 4ba is formed with a groove 4bb having a substantially horizontal length. The rotating portion 4a is loosely fitted in the groove 4bb (FIG. 6). Since the rotating portion 4a is loosely fitted in the groove 4bb in this manner, the sliding portion 4b slides upward when the rotating portion 4a moves due to the rotation of the handle grip 60. At this time, the sliding portion 4b is arranged so as to guide the sliding of the sliding portion 4b.
A vertical groove 4bc is formed on the back of the. A ridge 41c that loosely fits into the vertical groove 4bc is formed on a portion of the inner peripheral surface of the short tube 41 that faces the back of the sliding portion 4b.
Further, in order to ensure the sliding guide of the sliding portion 4b, the short pipe 4
A bottleneck portion 41d having a cross-sectional shape is formed at an appropriate position inside 1 so that only the flat surface portion 4ba of the sliding portion 4b can pass and other portions of the sliding portion 4b cannot pass.

A projecting rod 4c is formed at the lower end of the sliding portion 4b, and a through hole 4 provided in the projecting rod 4c.
A turnback (hook) -shaped end portion 58a of the connecting rod 58 is engaged with ca. In this way, the continuous rod 58
One end portion 58a of the one end is the sliding portion 4 of the motion converting means 4.
It is connected to b.

As described above, the tip pipe 40 has the short tube 41 including the motion converting section 4 at the upper end thereof, and the cylindrical receiver 2a is attached to the lower end thereof as shown in FIG. 11 ( In FIG. 10, the main body of the pipe 40 is omitted). A part of the structure of the locking means 2 is provided in this receiver 2a.

More specifically, a step portion 2ad is formed at an appropriate position on the outer peripheral surface of the receptor 2a, and the step portion 2ad is formed.
At the boundary, the receptor 2a is divided into a large diameter portion 2ae and a small diameter portion 2af. The small diameter portion 2af is fitted inside the tip pipe 40, and the large diameter portion 2ae is exposed to the outside from the body of the tip pipe 40. Then, the receptor 2a has, as a part of the tip pipe 40, a hollow portion 2aa having a large cross-sectional area 2ab and a small area 2ac, both ends of which are open at the center of the inside thereof. The part 2ab having a large cross section and the part 2ac having a small cross section are connected to each other to form one hollow part 2
aa is formed, and the boundary between the two is a step portion 2ag.

The locking means 2 is a hollow portion 2aa of the receiving body 2a.
An appropriate number of engaging elements 5 and 5 accommodated in the above-mentioned portion 2ab having a large cross-sectional area, and a receiver 2 accommodating the engaging elements 5 and 5.
an appropriate number of through holes 6 and 6 which are provided on the outer peripheral surface in the vicinity of the portion 2ab having a large cross-sectional area of the hollow portion 2aa of a and are capable of projecting a part of the surface of the engaging elements 5 and 5; When the pipe 40 is extended from the intermediate pipe 30, it is provided at a position overlapping with the through holes 6 and 6 of the tip pipe 40 of the intermediate pipe 30 and capable of receiving the protruding portions of the engaging elements 5 and 5. It has receiving parts 7 and 7.

The respective parts of the locking means 2 will be described in detail. It is suitable to employ metal balls such as steel balls having excellent wear resistance for the engaging members 5 and 5, but other materials may be used. It is also possible to carry out. Further, the number of the engaging elements 5 and 5 is not limited to the two shown in the figure, and one or three or more engaging elements can be used. As shown in the drawing, the through holes 6 and 6 penetrate the region 2ab where the cross-sectional area of the hollow portion 2aa of the receptor 2a is larger than the outer peripheral surface of the receptor 2a. The minimum diameter of the through holes 6 and 6 is smaller than the diameter of the engaging element 5. Further, the minimum diameter portion is in the vicinity of the opening on the outer peripheral surface side of the receptor 2a, and from the hollow portion 2aa side of the receptor 2a toward the outer peripheral surface side opening of the receptor 2a. It has a mortar shape with a minute taper. This is effective in smoothly guiding the engaging elements 5, 5 to predetermined positions when locking. Through hole 6 of the above-mentioned tip pipe 40 of the intermediate pipe 30
An annular cap 30 a is attached to the outer peripheral surface of the end portion overlapping with 6. The receiving portions 7, 7 are spaces formed by covering the holes 7a, 7a formed on the outer peripheral surface of the intermediate pipe 30 with the cap 30a.

The locking operation means 3 is a sliding rod 3 shown in FIG.
a. The sliding rod 3a is a long columnar body having a length along the support column 80 and loosely fitted in the hollow portion 2aa of the cylindrical receiving body 2a. The sliding rod 3a comes into contact with the engaging elements 5 and 5 in the portion 2ab of the hollow portion 2aa of the receiving body 2a.

The sliding rod 3a has an abutting portion 3aa at an appropriate position in the sliding direction, and is adjacent to the abutting portion 3aa.
It has a retreat portion 3ab which is retracted from aa. More specifically, the abutting portion 3aa is as shown in FIG.
As shown to, it is a part formed like a collar, and the receptor 2
a At the center of the inside of the portion 2ab having a large cross-sectional area of the hollow portion 2aa, the engaging elements 5 and 5 are brought into contact with each other to project the engaging elements from the through holes 6 and 6 toward the receiving portions 7 and 7 of the intermediate pipe 30. It has an outer diameter sufficient to make it impossible to turn back. Then, the receding portion 3ab is at least as shown in FIG.
1 is a portion located below the brim-shaped contact portion 3aa.

As shown in FIG. 11, a through hole 3ac is formed in the upper end of the sliding rod 3a, and a lower part of the connecting rod 58 formed in the same turnback shape as the upper end 58a is formed in the through hole 3ac. The end 58b is engaged. In this way, the other end 58b of the connecting rod 58 is connected to the locking operation means 3. Inside the portion 2ab having a large cross-sectional area of the hollow portion 2aa and on the outer peripheral surface of the sliding rod 3a,
A spring 8 is fitted between the step portion 2ag and the contact portion 3aa of the sliding rod 3a. The spring 8 constantly biases the stepped portion 2ag and the contact portion 3aa of the sliding rod 3a so as to keep them away from each other. This spring 8
The sliding rod 3a tries to move downward with respect to the receiving body 2a by the urging of the receiving rod 2a. However, the lower end 58b of the above-mentioned turnback-shaped connecting rod 58 does not contact the upper surface of the receiving body 2a. It abuts and restricts the further downward movement of the sliding rod 3a.

As shown in FIG. 11, when the spring 8 is biased, the lower end portion 58b of the connecting rod 58 is moved to the upper surface 2a of the receiving body 2a.
In the state of being in contact with h, the engaging elements 5 and 5 have the sliding rod 3
It abuts against the abutting portion 3aa of a and projects a part of the surface from the through holes 6, 6 to the outside of the tip pipe 40.
At this time, as described above, the protruding portions of the engaging elements 5 and 5 are inserted into the receiving portions 7 and 7, whereby the inner pipe 4 is
0 and the outer pipe 30 are locked, and the column 80 is
The inner pipe 40 holds the state of being pulled out from the outer pipe 30.

As shown in FIG. 12, the sliding portion 4b of the motion converting means 4 is raised by the rotation of the handle grip 60 in the circumferential direction r, and is connected to the end portion 58b of the connecting rod 58. The sliding rod 3a slidingly slides when the connecting rod 58 moves upward against the urging force of the spring 8 by being pulled from the connecting rod 58 in this manner, and the retreat portion 3ab comes into contact with the sliding rod 3a. It replaces the portion 3aa and contacts the engaging elements 5 and 5. As a result, the portions that have been forced out of the through holes 6 and 6 can be retracted. At this time, the engaging elements 5 and 5 do not have anything to push backward (abutting portion 3aa of the sliding rod 3a),
It becomes possible to retreat from the receiving portions 7 and 7, and the retreat is performed so that the through-holes 6 and 6 cannot come out. In this way, the locked state of the inner pipe 40 and the outer pipe 30 is released, and the inner pipe 40 can be housed inside the outer pipe 30.

The locking means 2 locks the tip pipe 40 and the intermediate pipe 30 that accommodates the tip pipe 40 among the pipes 20, 30, 40 forming the support column 80. This lock is released and the middle pipe 3
As the tip pipe 40 enters (falls) in 0, the lower end portion of the tip pipe 40, that is, the lower surface 2ai of the receiving body 2a, overlaps the lower end portion of the intermediate pipe 20 and the upper end portion of the proximal pipe 20. I will go to the part. There, there is provided a second locking means 102 for maintaining the stretched state of the intermediate pipe 30 and the pipe 20 on the base end side that houses the intermediate pipe 30, and the second locking means 1
Second locking operation means 103 for releasing the locked state of 02 is provided. The second locking means 102 will be described below.

As shown in FIG. 13, the intermediate pipe 30 is fitted with a cylindrical second receiver 102a. A part of the configuration of the second locking means 102 is provided in the second receiver 102a. More specifically, the second receptor 102
A step portion 102ad is formed at an appropriate position on the outer peripheral surface of a, and the second receptor 102 is formed with the step portion 102ad as a boundary.
a is divided into a large diameter portion 102ae and a small diameter portion 102af. The small diameter portion 102af is fitted inside the intermediate pipe 30, and the large diameter portion 102ae is exposed to the outside from the main body of the intermediate pipe 30. Then, the second receptor 102a is
As a part of the intermediate pipe 30, there is a hollow portion 102aa in the center of the inside of which the both ends open to the outside and which has a large cross-sectional area 102ab and a small area 102ac. The above-mentioned large area 102ab and small area 102a
It is connected to c to form one hollow portion 102aa, and the boundary between the two is a step portion 102ag.

The second locking means 102 is the second receiver 102.
An appropriate number of engaging elements 55, 55 accommodated in the above-mentioned large area 2ab of the hollow portion 2aa of a and the engaging element 5
Hollow part 102 of the second receptor 102a accommodating 5, 55
a suitable number of through holes 106, 106 provided on the outer peripheral surface near the portion 102ab having a large cross-sectional area of aa and capable of projecting a part of the surface of the engaging elements 55, 55;
When the intermediate pipe 30 is extended from the base end side pipe 20, it is provided at a position overlapping the through holes 106, 106 of the intermediate pipe 40 of the base end side pipe 20 and the engaging element 5
5, 55, and the receiving portions 107, 107 capable of receiving the above-mentioned protruding portions.

The respective parts of the second locking means will be described in detail below.
Similar to the engaging elements 5 and 5 of the locking means 2, the engaging elements 55 and 5 described above.
It is suitable to adopt a metal ball such as a steel ball having excellent abrasion resistance for the material 5, but it is also possible to use other materials. Further, the number of the engaging elements 55, 55 is not limited to the two shown in the figure, and one engaging element or three or more engaging elements can be implemented. The through holes 106, 106 are, as shown in FIG.
From the outer peripheral surface of the second receptor 102a, the second receptor 102a
The hollow portion 102aa penetrates into a portion 102ab having a large cross-sectional area. The minimum diameter of the through holes 106, 106 is the engaging element 5.
It is smaller than the diameter of 5. Further, the minimum diameter portion is in the vicinity of the opening on the outer peripheral surface side of the second receiving body 102a, and from the hollow portion 102aa side of the second receiving body 102a,
The second receiver 2a has a mortar shape that is slightly tapered toward the opening on the outer peripheral surface side. By forming in this way, this is similar to the through holes 6 and 6 of the locking means 2 described above.
5 can be guided to a predetermined position. Base side pipe 2
An annular cap 20a is attached to the outer peripheral surface of the end portion of the intermediate pipe 30 which overlaps the through holes 106, 106 of No. 0. The receiving portions 107 and 107 are the proximal pipe 20.
This is a space formed by covering the holes 107a, 107a drilled on the outer peripheral surface of this with this cap 20a.

The second locking operation means 103 is a sliding body 103a shown in FIG. This sliding body 103a is a support 8
The hollow portion 2 of the cylindrical receiving body 2a having a length along 0
It is a long columnar body that is loosely fitted in aa. Sliding body 103a
Is the portion 10 of the hollow portion 102aa of the second receptor 102a.
It contacts the above-mentioned engaging elements 55, 55 within 2ab.

The sliding body 103a has a portion 103aa having a larger cross-sectional area and a portion 103ab having a smaller cross-sectional area at appropriate positions in the longitudinal direction. More specifically, the portion 103aa having a larger cross-sectional area than the other portions is shown in FIG.
As shown in FIG. 2, the sliding member 103a is a flange-shaped portion at the lower end portion thereof, and the second receiving member 102a hollow portion 102aa.
Of the through hole 10 by contacting the engaging elements 55, 55 at the center of the inside of the portion 102ab having a large cross-sectional area.
6, 106, receiving portions 107, 10 of the proximal pipe 20
It has an outer diameter sufficient to project toward 7 and not return. And the part 10 having a small cross-sectional area
The 3ab is a portion located at least above the collar-shaped portion 3aa having a large cross-sectional area in FIG.

As shown in FIG. 13, the upper portion of the sliding body 103a is exposed from above the second receiving body 102a. A pin 103ac that protrudes leftward and rightward (substantially in the horizontal direction) is provided near the upper end of the sliding body 103a. On the outer peripheral surface of the upper portion of the sliding body 103a, the pin 103ac
A spring 108 is mounted between the upper surface 102ah of the second receiver 102a and the upper surface 102ah. This spring 10
8 is the pin 103ac and the upper surface 10 of the second receptor 102a.
In order to keep away from 2ah, both are always energized. Therefore, the sliding body 103a receives an upward bias, and the upper surface of the portion 103aa of the sliding body 103a having a large cross-sectional area is pressed against the step portion 102ad of the hollow portion 103aa of the second receiving body 102a. . At this time, the engaging elements 55, 55 are connected to the contact portion 10 of the sliding body 103a.
3aa, thereby contacting the through holes 106, 10
6, a part of the surface is projected to the outside. Then, the protruding portions of the engaging elements 55, 55 are the receiving portions 107,
The intermediate pipe 30 and the base end side pipe 20 are locked by entering the inside of the support pipe 107, and the support column 80 holds the state where the middle pipe 30 is pulled out from the base end side pipe 20.

As shown in FIG. 3, in order to shrink the support column 80, when the tip pipe 40 is accommodated in the intermediate pipe 30, the lower surface 2 of the receiving body 2a forming the base end portion of the tip pipe 40.
As shown in FIG. 14, ai or the lower end surface 3ad of the sliding rod 3a comes into contact with the upper surface 103ad of the sliding body 103a and pushes it. As a result, the sliding body 103a slides, and the retreat portion 103ab replaces the contact portion 103aa and comes into contact with the engaging elements 55, 55. At this time, the portions that have been forced out of the through holes 106, 106 can be retracted, and the locked state of the proximal pipe 20 and the intermediate pipe 30 is released. In this way, the intermediate pipe 30 can be lowered and the intermediate pipe 30 can be housed inside the proximal pipe 40 (FIG. 4).

As the locking means 2 and its locking operation means 3,
Further, the second locking means 102 and the second locking operation means 103 thereof.
In addition to the structure described above,
It is also possible to adopt and implement the conventional structure shown in FIG. However, as described above, the locking means 2 and the second locking means 10
By adopting a spherical body that is completely independent of other constituent members such as the engaging elements 5 and 5 and the engaging elements 55 and 55 as the configuration of 2, the smooth locking or unlocking between the pipes forming the support column 80 can be achieved. It is durable and can withstand long-term use. This is the lock pin 4 of the conventional cart shown in FIG.
In No. 8, when the elastic force of the second spring 46 is weakened due to long-term use (the second spring 46 is bent each time the locking is released, fatigue and deformation occur). Although there is a fear that the spring will not be able to exert its stopping function, the problem due to such deterioration of the spring is independent of the above-mentioned other members (completely separate body, for example, an elastic body such as the direct spring 8 or 108). This is because the adoption of the engaging element (which does not contact with) does not cause a problem.

Although not shown in order to avoid complication of the drawing, the joints of the respective pipes forming the support column 80 are appropriately knitted by a conventionally well-known joint so that the pipes do not come apart from each other when they are stretched. Have means.
For example, the inner diameter of the end opening of the pipe for accommodating another pipe is made smaller (constricted) than the other, and a collar-shaped portion is formed at the end of the pipe to be accommodated. Should be taken.

Here, FIG. 15, FIG. 16, FIG. 17 and FIG.
8 is used to describe still another embodiment of the structure for fixing the loading portion 10 and the base end side pipe 20 (FIG. 15 shows a state viewed from the direction La in FIG. 16, and FIG. 17 shows FIG.
The view seen from the Lb direction of FIG. Lf in FIGS. 15 and 17 indicates the traveling direction of the cart). Each drawing is a schematic diagram of the configuration in the vicinity of the load carrying portion 10 (the configuration of the vicinity of the tip end of the load carrying portion 10 and the crosspieces or the like normally passed between the proximal end side pipes 20, 20 does not complicate the drawing. Omitted to avoid). In this embodiment, the column 80 is composed of two pipes 2.
It is composed of 0 and 30. 12a is a wheel 12
Indicates a wheel holder in which the axle is stopped, and 12b indicates an axle stop portion 12b of the wheel 12. The individual wheel holders 12a are
It is fixed to each of the base side pipes 20, 20. A skeleton 10a, which is a skeleton of the loading section 10, has its rear end and its vicinity fixed to the wheel holder 12a. 10b
Indicates this shaft stopper. The skeleton 10a is a horizontally extending pipe, and a locking pin 10c is provided therein (FIG. 16). The locking pin 10c includes a pressing spring 16d that is substantially V-shaped in plan view. And the skeleton 10
The outer side surface near the rear end of a is in contact with or close to the lower side surface of the proximal pipe 20. A hole 10e is formed on the outer side surface of the skeleton 10a. The pressing spring 10d is housed in the skeleton 10a against the resilience, and the tension locking pin 10c is held in the skeleton 10a.
Is urged so that the tip of the locking pin 10c is projected to the outside of the skeleton 10a through the hole 10e. A through hole 20b communicating with the inside of the proximal pipe 20 is formed in the lower side surface of the proximal pipe 20.
Are formed. As shown in FIG. 16, the tip of the locking pin 10c protruding from the hole 10e to the outside of the skeleton 10a enters the inside of the proximal pipe 20 from the through hole 20b. In this state, the load carrying unit 10 does not rotate with respect to the base end side pipe 20 or the wheel holder 12a that is the same as the base end pipe 20.

By operating the handle grip 60 described above, the pipe 30 is pushed down as shown in FIG. 12 described above (in this embodiment in which the individual support columns 80 are composed of two pipes, the base end side pipe). This pipe 30 housed in 20 has the same structure as the front end pipe 40 as the front end pipe 40, that is, the structure in which the operation of the handle grip 30 is transmitted by the connecting rod. The locking means (second locking means 102) is the same as that of the tip pipe 4 of FIG.
However, here, regarding the lower end surface 3ad of the sliding rod 3a,
It is shown not exposed downward in the other pipes). The lower end portion of the pipe 30 that has descended in the base end side pipe 20 pushes back the locking pin 10c that enters the inside of the base end side pipe 20 against the pressing spring 10d. By retracting the locking pin 10c, the rotation of the load carrying portion 10 is eliminated, and the load mounting portion 10 can be rotated around the shaft stopper portion 10b (FIG. 18). In this state, the loading section 10 can be folded (FIG. 17). In order to prevent the loading section 10 from being opened accidentally when folded, such as a raised portion or a stepped portion that the locking pin 10c rides up (retracts once) and then projects again until the folded state is reached. An obstacle or a recess into which the tip of the locking pin 10c can enter at a completely folded position is formed in the wheel holder 12a or a portion in the vicinity thereof (when the locking pin 10c is located) (when folded).
It may be formed (not shown).

As described above, in the state where the pipe 30 housed in the proximal end side pipe 20 is completely pushed down, the pipe 30 is provided with the (second) locking means 102 so that the pipe 30 is not lowered further. Receptive portions 20c, 20c capable of receiving a part of the engaging elements 55, 55 are formed on the inner peripheral surface of the proximal end side pipe 20 (FIG. 16). In FIG. 16, the receiving portions 20c, 20c are formed as through holes penetrating from the inside to the outside of the pipe 30, but unlike this, as the recesses that do not penetrate to the outside, the pipe 30 is formed.
It can be implemented even if it is formed on the inner peripheral surface. By forming in this way, when the pipe 30 is lowered, part of the engaging elements 55, 55 enters the receiving portions 20c, 20c, and further lowering is stopped. Base side pipe 2
When pulling out the pipe 30 from 0, the handle grip 30 is similarly actuated to retract the engaging members 55, 55 and release the engagement with the receiving portions 20c, 20c. That is, if the handle grip 30 is not operated, the pipe 30 is maintained in the state of being housed in the base end side pipe 20, and does not inadvertently extend.

In the structure shown in FIG. 1, a supporting piece 10f for supporting the cart together with the wheels 12 is formed at the lower end of the tip of the loading section 10 when the cart is stopped.
However, instead of such a configuration, it is also possible to provide a wheel on the tip end side of the load carrying unit 10 (not shown). By providing the wheels on both the front and the rear of the loading section 10 in this way, it is convenient to run the cart without having to lift the front to balance the cart. Further, unlike the carts shown in the above-described respective embodiments, a shopping cart provided with a bag portion for accommodating a load in the vicinity of the loading section 10 can be implemented (not shown).

[0053]

According to the first aspect of the present invention, it is possible to release the locking of the pipes forming the support by simply returning the wrist of the hand holding the handle grip.
Therefore, in that state, by pushing the handle grip toward the base end side of the support, it is possible to extremely easily contract the support and reduce the bulk of the cart.

By carrying out the second invention of the present application, the above first
It is possible to provide a cart suitable for obtaining such an effect as well as obtaining the same effect as the invention of. In particular, even if you have a pillar composed of three or more pipes,
That is, even when the support column is formed by connecting a large number of pipes, the operation of accommodating all the pipes and accommodating them in other pipes can be easily performed and the usability is significantly improved.

By carrying out the third invention of the present application, the above first
Alternatively, the effect of the second aspect of the invention can be obtained, and not only the pipe but also the load carrying portion can be folded, and portability is remarkably improved.

By carrying out the fourth invention of the present application, the above first
Alternatively, it is possible to provide the second or third effect and provide a locking structure in which the function is less deteriorated due to long-term use.

[Brief description of drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is a front view showing a state in which the support column of the embodiment is extended.

FIG. 3 is a front view showing a state in which the support column of the above-described embodiment is contracted partway.

FIG. 4 is a front view showing a state in which the support column of the embodiment is completely contracted.

FIG. 5 is a schematic perspective view of a handle grip 60 according to an embodiment of the present invention.

FIG. 6 is a schematic vertical cross-sectional view of an essential part showing a configuration near a short pipe 41 of the present invention.

FIG. 7 is an exploded perspective view of the handle grip 60 shown in FIG.

FIG. 8 is a schematic vertical cross-sectional view of the center of the handle grip 60.

FIG. 9 is a central vertical cross-sectional view showing a rotating state of the handle grip 60.

FIG. 10 is a perspective view of relevant parts showing a configuration around a sliding portion 4b, a sliding rod 58, a locking means 2 and a locking operation means 3.

11 is a schematic vertical cross-sectional view of essential parts showing the structure in the vicinity of the joint between the tip pipe 40 and the intermediate pipe 30. FIG.

FIG. 12 is a schematic vertical cross-sectional view of an essential part showing the configuration in the vicinity of the joint between the tip pipe 40 and the intermediate pipe 30.

FIG. 13 is a schematic vertical cross-sectional view of an essential part showing the configuration around the joint between the intermediate pipe 30 and the proximal end side pipe 30.

FIG. 14 is a schematic vertical cross-sectional view of an essential part showing a configuration in the vicinity of a joint between the intermediate pipe 30 and the proximal end side pipe 30.

FIG. 15 is a principal part explanatory view showing the vicinity of the load placing part 10 of another embodiment.

FIG. 16 is an essential part explanatory view showing a state in which the vicinity of the load placing portion 10 of the above embodiment is viewed from the rear of the cart.

FIG. 17 is an essential part explanatory view showing a state in which the load carrying section 10 of the embodiment is folded.

FIG. 18 is an essential part explanatory view showing a state in which the load placing section 10 of the above-described embodiment is folded, as viewed from the back of the cart.

FIG. 19 is a partially cutaway front view showing one extended state of a conventional cart column.

20 is a longitudinal sectional view of a main part taken along the line II-II of FIG.

FIG. 21 is an overall front view of a conventional cart.

FIG. 22 is an overall side view of the conventional cart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Locking means 3 Locking operation means 4 Motion conversion means 4a Rotating part 4b Sliding part 10 Loading part 12 Wheel 20 (Base end side) pipe 30 (Intermediate) pipe 40 (At the tip) pipe 58 Rod 58a (connecting rod) end 58b (connecting rod) end 60 Handle grip 60a (handle grip) one end 80 Strut r (handle grip) circumferential direction

Claims (4)

[Claims] 1. A support (10), a wheel (12), (12), a handle grip (60), and columns (80) (80) for supporting the handle grip (60). Each of (80) is provided with a plurality of pipes (30) (40) having different diameters, the strut (80) is contracted by stacking the pipes, and is stretched by feeding out the stacked pipes (40). (30) and (40) are locking means (2) for maintaining the stretched state, and a member for releasing the locking state of the locking means (2) by sliding along the support column (80). In the cart having the stopping operation means (3), at least a part of the handle grip (60) is rotatable with respect to its own circumferential direction (r), and the handle grip (60) or the handle grip (60). ) Is provided with a motion converting means (4) for converting a rotary motion into a linear motion, and the motion converting means (4) includes a rotating part (4a) performing a rotary motion and a sliding part (4b) performing a linear motion. Equipment This rotating part (4a) rotates together with the rotation of the handle grip (60) to slide the sliding part (4b), and the sliding part (4b) is locked. A cart characterized in that it is connected to a movement means (3). 2. The support column (80) comprises at least three pipes, a proximal end pipe (20), an intermediate pipe (30) and a distal end pipe (40) in order of increasing diameter, and the distal end pipe (40). Is provided with a handle grip (60), and the locking means (2) includes a tip pipe (40) and an intermediate pipe (3).
The intermediate pipe (30) and the proximal pipe (20) capable of accommodating the intermediate pipe (30) are the second locking means (102) for maintaining the extended state. And a second locking operation means (103) for releasing the locked state of the second locking means (102) by releasing the locked state of the locking means (2) by sliding along the column (80). ) And a tip pipe (4) including a locking means (2) and a locking operation means (3).
The cart according to claim 1, further comprising a pressing means for pressing the second locking operation means (103) at an appropriate position below the (0). 3. The loading section (10) is axially fixed to a pipe (20) located at the most proximal side, and the pipe (20) is
It is foldable, and the load carrying part (10) is formed with a rotation locking part that engages the most proximal end side pipe (20) and maintains an open state from this pipe (20). The cart according to claim 1 or 2, characterized in that lock release means of a rotation lock portion is provided at a lower portion of the pipe connected to the most proximal end side pipe (20). 4. The locking means (2) and the second locking means (102)
Are provided on inner pipes accommodated in other pipes, respectively, and an appropriate number of engaging elements are provided inside each of the inner pipes, and provided on the outer peripheral surface of the inner pipe. And a receiving portion provided at a position overlapping the through hole of the outer pipe when the pipe is stretched, and the locking operation means (3) and the second locking operation. Means (103) means
Each has a sliding rod, and each sliding rod has an abutting part that abuts the engaging part so that a part of the engaging part projects outward from the through hole, and a retreating part retracted from the abutting part. Are formed side by side in the sliding direction of the sliding rod, and by abutting on the abutting portion of the sliding rod, the engaging element projects a part of the surface to the outside from the through hole, and the engaging element projects. The part is to enter into the receiving part, the inner pipe and the outer pipe are locked, and both pipes are maintained in a stretched state, and the sliding rod is the motion converting means (4) or In response to the sliding of the pressing part of the other pipe, the retreating part replaces the abutting part, and the part projecting outside from the through hole (6) of the engaging element can be retracted, and the inner pipe becomes the outer pipe. The container according to claim 1, 2 or 3 is characterized in that it can be housed inside the container. To