JPH042132Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a foldable portable cart used for transporting baggage and the like.

[Conventional technology]

In general, a portable cart has a base that supports wheels on the left and right sides, and a load carrying section that is horizontally cantilevered and can be folded, and a vertically extendable handle column is attached to the base. It has a set configuration. And when not in use,
The handle strut is contracted, and the shrunken handle strut is folded down onto the loading surface to a size suitable for carrying.When ready for use, the handle strut is raised up from the loading surface and this After the handle support is extended to a length that allows it to be pushed or pulled by hand in an upright position, the cargo is placed on the cargo loading section for use. The expansion and contraction of the handle support of this carrying cart is locked to prevent contraction when it is in an extended state, and this lock is released when it is retracted. This locking means is constructed by inserting and holding a flanged lock pin in a spring-biased state into a pin hole formed in the wall surface of each expanding and contracting inner tube, and inserting it into a locking pin hole formed in the outer tube. The release means is such that the tip of the flange locking pin protruding from the outer tube is pushed in against a spring from the outside, for example, with a fingertip or on the slope of the release tube that slides within a certain range against the outer tube. . (For example, JP-A No. 52-59437) [Problem to be solved by the invention] However, in the above-mentioned release means, if the tip of the flanged lock pin is simply pushed in, it will return to its original state due to the spring, so that it will not return to its pushed state. It is necessary to maintain the position with one hand while applying force with the other hand in the direction of contracting the handle strut. In addition, for those equipped with a release tube, after sliding the release tube and pushing in the flanged lock pin, you can either apply force in the direction of contraction to the handle strut, or operate the release tube with one hand and press the handle strut with the other. It is necessary to apply force in the direction of contraction. As described above, conventional portable carts have the inconvenience of requiring two-step operation, especially when retracting the telescoping handle support, requiring the use of both hands.

The object of this invention is to eliminate the above-mentioned conventional inconveniences and to provide a portable cart whose handle support can be retracted by one-handed operation.

[Means for solving problems]

In order to achieve the above-mentioned object, this invention has a configuration in which the releasing means for the flanged lock pin can be operated with one hand using a movable handle that is linked to a releasing metal fitting provided in an extensible pipe. That is, a pair of handle struts in which an intermediate pipe is slidably inserted into the lower end side of the tip pipe, and a base pipe is further slidably inserted into the lower end side of the intermediate pipe, so that the entire length can be freely expanded and contracted; a handle grip that connects the upper ends of the tip pipes of the handle strut;
The lower ends of the foundation pipes of the pair of handle struts are vertically fixed, and the base body has a pair of wheels on the left and right sides, and is supported by the base in a cantilevered manner, and has positions at right angles and overlapping positions with respect to the handle struts. A carrying device comprising: a load carrying section which can be rotated freely between the handlebars; a lock that locks the pipes so that they do not slide against each other when the handle support is extended; and a lock that releases this lock; and a means for releasing the lock. In the mobile cart, the lock and its release means are connected to a first locking hole formed at the upper end of the base pipe, a first pin hole formed at the lower end of the intermediate pipe, and the first pin hole formed at the lower end of the intermediate pipe.
A first flanged lock pin inserted from inside the pipe in a state where the open positions of the pin hole and the first locking hole overlap, and a first flanged lock pin supported within the pipe and urged outward. A first spring provided at the upper end of the intermediate pipe, and a second spring provided at the upper end of the intermediate pipe.
A locking hole and a second hole provided at the lower end of the tip pipe.
a second flanged lock pin inserted into the pin hole from the inside of the pipe with the opening positions of the second pin hole and the locking hole overlapping; and the second flanged lock pin supported within the pipe. and a second spring disposed inside the pipe that enters from above between the inner wall surface of the pipe and the flange of the first flanged lock pin to force the first flanged lock pin outward. The second flanged lock pin is moved from below by entering between the first parallel cam edge to be retracted against the elastic force of the spring, the inner wall surface of the pipe, and the flange of the second flanged lock pin. a lock release metal fitting formed with a second parallel cam edge for retracting against the elastic force of a spring; a connecting rod disposed within the tip pipe and having one end connected to the lock release metal fitting; and a lower part of the handle grip. A movable handle is installed between the two end pipes in parallel thereto, and the other end of the connecting rod is fixed so that the handle can be pulled up toward the handle grip; The gist of the present invention is to provide a carrying cart characterized by comprising a spring that biases the handle in a direction that separates the handle.

[Effect]

The portable cart according to this invention configured as above is
When retracting the handle strut from its extended state, grasp the handle grip connecting the end pipes together with the movable handle connected to the connecting rod with one hand, and use the grip force to move the movable handle to the built-in spring. When the lock is pulled up toward the handle grip against the lock, the lock release metal fitting will move inside the tip pipe due to the link. With this movement,
First, the first flanged lock pin in the tip pipe is retracted from the second locking hole of the intermediate pipe against the second spring by the second parallel cam edge of the lock release metal fitting, and the lock is released. Therefore, when a force is applied in the direction of contraction in this state, the tip pipe slides into the intermediate pipe and is contracted, and as the tip pipe slides into the intermediate pipe, the first part provided at the tip of the lock release fitting The parallel cam edge enters between the flange of the first flanged lock pin provided in the intermediate pipe and fitted into the first locking hole of the base pipe and the inner wall surface of the intermediate pipe, and the first flanged lock pin is inserted into the middle pipe. It is moved backward against the first spring to release the lock between the intermediate pipe and the foundation pipe. For the time being,
The intermediate pipe that entered when the tip pipe contracted,
It then goes into the foundation pipe and the handle strut is contracted.

〔Example〕

An embodiment of the portable cart according to this invention will be described with reference to the drawings.

Fig. 1 is a partial front view showing one embodiment of this invention, with one of the handle struts in an extended state, with one section taken apart, Fig. 2 is a cross-sectional view of Fig. FIG. 4 is a front view of the entire cart in an extended state with some parts cut away, and FIG. 4 is also a side view.
The base body 16 supports the pipe 2 and has a pair of pipe support parts 14 erected thereon, and can be folded by pivoting in the direction of the arrow about a folding shaft 18. A pair of foundation pipes 20 are inserted and fixed into the pair of pipe support parts 14, and respective sleeves 24 integrally formed on the left and right sides of the carrying grip 22 are fixed to the upper ends of the foundation pipes 20, and are fixed to the side walls of the foundation pipes 20. A first locking hole 26 is formed therein. This first locking hole 26 is a relief space 2 formed in the sleeve 24.
It corresponds to position 8. Further, the intermediate pipe 30 which is fitted onto the foundation pipe 22 and is slidable has a first pin hole 32 at the lower end corresponding to the first locking hole 26 of the foundation pipe 20 and a second pin hole 32 at the upper end.
A locking hole 34 is provided. The first pin hole 32 of the intermediate pipe 30 and the foundation pipe 20
In the first locking hole 26, the first flanged lock pin 3 is inserted.
6 is inserted in a spring-biased state by a first spring 38 formed by bending a piano wire or the like. Further, the distal end pipe 40, which is fitted onto the intermediate pipe 30 and is slidable, has a second pin hole 42 at its lower end corresponding to the second locking hole 34 of the intermediate pipe. A lock release fitting 44, a second spring 46, and a second flanged lock pin 48 are installed inside the lower end of the tip pipe 40. The second flanged lock pin 48 passes through the hole 50 and is fitted into the second pin hole 42 of the tip pipe 40 and the second locking hole 34 of the intermediate pipe 30. 46, it is spring-biased in the insertion direction.

The lock release fitting 44 has a cross section perpendicular to the longitudinal direction of C.
A second flange is provided on both sides of the slide slot 50 and contacts the flange of the second flange lock pin 48.
A parallel cam edge 54 is formed, and a first parallel cam edge 56 is formed at the lower end of the first flanged lock pin 36 for sliding under the flange of the first flanged lock pin 36 and retracting it 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 of the lock release metal fitting 44. A cap 62 connected with a handle grip 60 is attached to the upper end of the tip pipe 40, and a connecting rod 58 is connected between the inner inner surface of the cap and the other end of the connecting rod 58.
A spring 64 is interposed to bias the spring downward. Then, it enters the tip pipe 40 through an axially long hole 66 opened in the tip pipe 40 horizontally below the handle grip 60 at a position where it can be gripped with one hand together with the handle grip 60, and connects both ends. Movable handle 6 connected to 58
8 are arranged. This movable handle 68 is covered at both ends with operating grips 72 that are integrated with a cylindrical portion 70 that is slidably fitted onto the tip pipe 40. In addition, 80 in the figure is the foundation pipe 20,
This is a handle support column composed of an intermediate pipe 30 and a tip pipe 40. Although not shown, each pipe is provided with a stopper.

Next, the operation when contracting the handle support column 80 of the carrying cart described above will be explained.

First, handle grip 60 and operation grip 7
2 with one hand, and pull the operating grip 72 toward the handle grip 60 while applying downward force. This causes the movable handle 68 in the operating grip 72 to move upward along the elongated hole 66 and against the spring 64. Since the movable handle 68 is connected to the connecting rod 58, moving forward and upward will pull the connecting rod 58 upward. and,
The lock release fitting 44 connected to the connecting rod 58 moves upward. By this movement, the lock release metal fitting 4
The second parallel cam edge 54 of No. 4 causes the second flanged lock pin 48 to retreat against the elastic force of the second spring 52,
The engagement between the tip of the second flanged locking pin 48 and the second locking hole 34 of the intermediate pipe 30 is released, and the tip pipe 40 is housed into the intermediate pipe 30 by the downward force. . Then, just before the distal end pipe 40 is completely housed in the intermediate pipe 30, the first parallel cam edge 56 at the lower end of the lock release fitting 44 is connected to the flange of the first flanged lock pin 36 and the intermediate pipe 30. The first flanged lock pin 36 enters between the inner walls and retreats against the elastic force of the first spring 38. As a result, the tip of the first flanged lock pin 36 and the foundation pipe 2
0 is disengaged from the first locking hole 26, the intermediate pipe 30 is housed in the base pipe 20, and the handle support column 80 is contracted. On the other hand, in order to extend the handle strut 80 in the contracted state, simply hold the handle grip 60 and pull it upward, and each pipe will extend and be biased toward the first locking hole by the first spring. A second flanged lock pin 48 into which the first flanged lock pin 36 is fitted and which is biased toward the second locking hole 34 by a second spring
are inserted and locked.
In addition, the handle support column 80 is retracted, and the load carrying section 10 is
In the folded state, the user carries it by holding the carrying grip 22.

[Effect of idea]

According to the portable cart of this invention, which is constructed and operates as described above, the handle support can be extended and locked by simply grasping the handle grip and pulling in the extension direction. Even when retracting the handle strut, if you grasp the handle grip and movable handle with one hand and use that grip to pull the movable handle towards the handle grip while applying downward force, the lock will be released easily and reliably, and the handle strut will be retracted. can be contracted. Therefore, it is no longer necessary to use both hands to perform the lock release operation with one hand while applying the contraction force with the other hand, as in the past, and the handle strut can be expanded and contracted with one-touch operation using one hand. We were able to provide a portable cart.

[Brief explanation of the drawing]

Fig. 1 shows one embodiment of this invention, a partial front view showing one of the pair of handle supports in an extended state as a cross section, Fig. 2 is a sectional view of Fig. 1,
FIG. 3 is a front view of the portable cart in an extended state, with some parts omitted, and FIG. 4 is a side view of the same. DESCRIPTION OF SYMBOLS 10...Loading part, 12...Wheel, 16...Base body, 18...Folding shaft, 20...Foundation pipe, 2
2... Carrying grip, 26... First locking hole, 3
0...Middle pipe, 32...First pin hole, 34...
...Second locking hole, 36...First flanged lock pin,
38...First spring, 40...Tip pipe, 42...
...Second pin hole, 44...Lock release fitting, 46...
...Second spring, 48...Lock pin with second flange, 5
4... Second parallel cam edge, 56... First parallel cam edge, 58... Connecting rod, 60... Handle grip,
64...Spring, 68...Movable handle, 72...
...Operating grip, 80...Stand for handle.

Claims (1)

[Scope of utility model registration request] A pair of handle struts, each of which has an intermediate pipe slidably inserted into the lower end of the tip pipe, and a base pipe slidably inserted into the lower end of the intermediate pipe so that the entire length can be expanded and contracted; A handle grip that connects the upper ends of the tip pipes of the handle struts, and a base body that vertically fixes the lower ends of the base pipes of the pair of handle struts, and has a pair of wheels on the left and right sides, and a cantilever type a load carrying section supported by the handle support column and rotatable between a position perpendicular to the handle support column and an overlapping position; In a portable cart comprising a lock for releasing the lock and a means for releasing the lock, the lock and the means for releasing the lock are provided in a first locking hole provided at the upper end of the base pipe and at the lower end of the intermediate pipe. a first flanged lock pin that is inserted from inside the pipe into the first pin hole, the first pin hole and the first locking hole overlap each other from the inside of the pipe; A first spring that urges the first flanged lock pin outward; a second locking hole formed at the upper end of the intermediate pipe; a second pin hole formed at the lower end of the tip pipe; With the opening positions of the two pin holes and the locking hole overlapping, a second flanged lock pin is inserted from inside the pipe, and the second flanged lock pin supported within the pipe is urged outward. a second spring disposed inside the pipe that enters from above between the inner wall surface of the pipe and the flange of the first flanged lock pin, and applies the elastic force of the first spring to the first flanged lock pin. The second flanged lock pin is moved from below by entering from below between the first parallel cam edge to be retreated and the inner wall surface of the pipe and the flange of the second flanged lock pin.
a lock release metal fitting formed with a second parallel cam edge for retracting against the elastic force of a spring; a connecting rod disposed inside the tip pipe and having one end connected to the lock release metal fitting; and a lower part of the handle grip. A movable handle is installed parallel to the above-mentioned end pipes between the two end pipes, the other end of the connecting rod is fixed, and can be freely pulled up toward the handle grip; A carrying cart comprising a spring that biases the handle in a direction that separates the handle from the handle.