JPH0740351U - Carrying cart - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the operating grip is accidentally activated when the carrying cart is moved, the pipes of the handle column are prevented from coming off. [Structure] An engaging projection 82 is provided near the lower end of the tip pipe 40 so as to elastically project outward from its outer wall surface, and a pin hole 42 and a locking hole are provided near the upper end of the intermediate pipe 30. An engaging hole 86 is formed in which the engaging protrusion is fitted when the engaging hole overlaps with 34.
The upper side of the engaging protrusion is formed so as to be engaged with the upper edge of the inner periphery of the engaging hole so that the engaged state is maintained. Engage with the lower edge of the inner periphery of the engaging hole so that the engaging projection is retracted inward from the outer wall surface of the tip pipe when it is slid downward with respect to the elastic force. It is formed on the guide side that is in sliding contact.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foldable carrying cart used for carrying baggage and the like.

[0002]

[Prior art]

 This kind of carrying cart is horizontally cantilevered by a base body having wheels mounted on the left and right and is foldable as disclosed in, for example, Japanese Utility Model Publication No. 4-2132. And a plurality of parallel pipes, for example, a front end pipe, an intermediate pipe, and a base pipe, are connected to the base body to extend and contract. It has been configured. Further, as shown in the upper portion of the handle support column 1 in FIG. 6, a handle grip, which is a handle for gripping the carrying cart by hand, is provided between the upper ends of the handle support columns 1 and 1. 2 is mounted. When the carrying cart is not in use, the handle column is contracted, and the contracted handle column side is raised to fold it to a size suitable for carrying. After tilting forward from the handle support pole to open the loading section at an angle of 90 ° with respect to the handle support, extend the handle support to a length that can be manually pushed or pulled in the standing position, and then load the support. I try to put luggage on the department.

When the handle strut of the carrying cart is extended / contracted, the handle strut is locked to prevent the handle strut from contracting in the extended state, while the handle strut is unlocked when the handle strut is about to be contracted. It is supposed to do. In this lock, one pipe is slidably inserted into the other pipe, and the handle strut is expanded and contracted, and is inserted into a pin hole formed in the wall surface of one pipe in a spring-biased state and held. The lock pin with a collar is fitted into a locking hole formed in the other pipe. On the other hand, to unlock, slide the release member with the cam edge that engages the collar of the collar lock pin along the pipe, and the tip of the collar lock pin protruding from the pipe springs the spring. This is done by pulling the pipe inward against the force.

[0004] In order to easily perform the expansion and contraction operation of the handle strut with one hand, the lock when the handle strut is extended is one leg of the carrying cart base with the handle strut contracted. When the handle grip 2 is held and fixed with one hand and pulled up, the pipes slide with each other as the operation proceeds, and the collar that is inserted into the pin hole of one of the pipes in a spring-biased state. The lock pin is fitted into the locking hole of the other pipe, so that it is automatically performed. On the other hand, as shown in FIG. 6, the lock is released when the handle strut is contracted, by operating the operation grip 3 provided at a position close to the hand grip 2 with one finger of one hand and pulling the handle grip upward. If 2 is pushed down with one hand and tip pipe 4 is pushed in, the release member slides with the series of operations to lock between the tip pipe and the intermediate pipe and between the intermediate pipe and the base pipe, respectively. The lock pin with a collar is automatically pulled in by sequentially pulling it into the pipe.

[0005]

[Problems to be solved by the device]

 However, when the carrying cart is moved, the operating grip may be mistakenly gripped without gripping the hand grip 2. Then, the operation grip 3 is pulled to the side of the hand grip 2 and, as a result, the release member is actuated to release the lock, and by the momentum at that time, one pipe of the handle strut that expands and contracts becomes the other pipe. It happens that it comes off. That is, the retaining means is provided between the pipes forming the handle strut, but if the operation grip 3 is pulled up while a heavy load is placed on the loading section, the retaining means will come off. One of the pipes comes off from the other pipe without stopping the protection. If the operation grip 3 is mounted away from the handle grip 2 in order to eliminate such a situation, there is a problem that it becomes difficult to perform the unlocking operation.

Further, when the handle support column in the extended state is contracted, as shown in FIG. 6, the operation grip 3 is operated and pulled up to release the lock. As a result, an upward force may be applied to the operation grip 3, and as a result, one pipe of the handle strut may come off from the other pipe.

The present invention has been made in view of the above circumstances. Even when the operating grip is erroneously actuated when the carrying cart is moved, or the contraction operation of the handle support column in the extended state is performed. In that case, even if you accidentally apply an upward force to the operating grip in the unlocked state, one pipe of the handle strut may come off from the other pipe. The purpose is to provide a portable cart that does not exist.

[0008]

[Means for Solving the Problems]

 In the carrying cart according to the present invention, the intermediate pipe is slidably inserted into the lower end side of the tip pipe, and the base pipe is slidably inserted into the lower end side of the intermediate pipe, so that the entire length can be expanded and contracted. A pair of parallel handle struts that are parallel to each other, a handle grip that connects upper end portions of the tip pipes of the pair of handle struts, and a lower end portion of the base pipe of the pair of handle struts are fixed. A base body having a pair of wheels on the left and right, and cantilevered by the base body, and rotatable between a position opened forward with respect to the handle strut and a position overlapping the handle strut. The load-carrying section and the lock and unlocking means for locking and unlocking the pipes so that the pipes do not slide when the handle strut is extended are provided. The locking means for the intermediate pipe and the tip pipe is provided with a locking hole formed near the upper end of the intermediate pipe and a hole near the lower end of the tip pipe in a circumferential position aligned with the locking hole. The pin hole provided, the lock pin with a flange inserted into the pin hole and the locking hole from the inside of the pipe in a state where the pin hole and the locking hole overlap each other, and the collar fixedly supported in the pipe. And a spring that urges the lock pin with a flange toward the outer side of the pipe, and the lock release means causes the lock pin with a collar to retract against the elastic force of the spring, and the tip of the lock pin with a collar. The part is pulled out from the locking hole of the intermediate pipe. The above-mentioned carrying cart is equipped with the following mechanism to prevent the tip pipe from coming off from the intermediate pipe. That is, an engaging member that elastically protrudes outward from the outer wall surface of the tip pipe is provided near the lower end of the tip pipe, and the pin hole and the pin hole are provided near the top end of the intermediate pipe. An engaging hole into which the protruding portion of the engaging member fits when the engaging hole overlaps is formed, and the upper side portion of the protruding portion of the engaging member is the inner peripheral upper edge portion of the engaging hole. Is formed at a right angle or an acute angle with respect to the axial direction of the wall surface of the intermediate pipe so that the engagement state is maintained. Slidingly engages with the lower edge of the inner periphery of the engaging hole so that the protruding part of the engaging member is retracted inward from the outer wall surface of the tip pipe against the resilient force. Formed a guide edge that touches.

Further, in the carrying cart having the above-described structure, a spring for urging the locking pin with the collar toward the outside of the pipe is provided in the tip pipe with one end fixed to the locking pin with the collar. -Shaped spring, the other end of the linear spring is bent to form an engaging member, and the protruding portion of the engaging member is housed in the vicinity of the lower end of the tip pipe to form a pin hole in the tip pipe. The storage hole may be formed so as to overlap the engaging hole of the intermediate pipe when the locking hole of the intermediate pipe overlaps with the engaging hole of the intermediate pipe.

[0010]

[Action]

 In the carrying cart configured as above, the lock between the leading end pipe and the intermediate pipe is released with the handle strut extended, and in the unlocked state, the leading end pipe and the tip end with respect to the intermediate pipe are released. Even if force is applied in the direction to pull up the pipe, the upper side of the part of the engaging member arranged near the lower end of the tip pipe that protrudes outward from the outer wall surface of the tip pipe is Since the engaged state is maintained by engaging the inner peripheral upper edge of the engaging hole formed near the upper end, the tip pipe does not come off from the intermediate pipe. On the other hand, when retracting the handle column, as in the conventional case, if the lock handle is released and then the handle grip is pushed down and the tip pipe is pushed in, the guide side formed on the engaging member is in the middle. It engages with the inner peripheral lower edge of the engaging hole drilled near the upper end of the pipe and makes sliding contact, and the protruding part of the engaging member resists elastic force and sinks inward from the outer wall surface of the tip pipe. Therefore, the tip pipe slides downward with respect to the intermediate pipe without any trouble and is accommodated in the intermediate pipe.

[0011]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and is a partial front view showing a state in which a pair of handle columns of a carrying cart are extended, and FIG. 2 is a partial front view. FIG. 2 is a sectional view taken along line II-II. Further, FIG. 3 is a front view in an expanded state in which the entire carrying cart is partially broken and omitted, and FIG. 4 is a side view of the same.

First, a configuration that has been conventionally provided will be described. The loading section 10 supports the wheels 12, 12 on the left and right, and turns the folding shaft 18 in the direction of the arrow with respect to the base body 16 on which the pair of pipe supporting portions 14, 14 are erected and folds. You can do it. Then, a pair of base pipes 20, 20 are inserted and fixed in the pair of pipe support portions 14, 14, and sleeves 24 integrally formed on the left and right of the carrying grip 22 are covered at the upper ends of the respective base pipes 20. The crown is fixed. Each base pipe 20 is provided with a first locking hole 26 at a position corresponding to an escape space 28 formed in each sleeve 24. In addition, each intermediate pipe 30 which is externally fitted to the base pipe 20 and is slidable, has its lower end portion aligned with the first locking hole 26 of each base pipe 20 in the circumferential direction so as to have the first pin. Holes 32 are bored, and second locking holes 34 are bored in the upper end portions, respectively. Then, in the first pin hole 32 of the intermediate pipe 30 and the first locking hole 26 of the base pipe 20, a lock pin 36 with a first brim is attached by a first spring 38 formed by bending a piano wire or the like. It is inserted in a vigorous state. Further, each tip pipe 40, which is fitted onto each intermediate pipe 30 and is slidable, has its lower end aligned with the second locking hole 34 of the intermediate pipe in the circumferential direction so as to be aligned with the second pin. A hole 42 is provided. Further, inside the lower end portion of the front end pipe 40, a lock release fitting 44, a second spring 46, and a second lock pin 48 with a flange are provided. Then, the second locking pin 48 with the flange penetrates the elongated hole 50 for sliding formed in the unlocking tool 44 and is inserted into the second pin hole 42 of the tip pipe 40 and the second locking hole 34 of the intermediate pipe 30. It is inserted and spring-biased in the fitting direction by a second ridge 46 formed by bending a piano wire or the like.

The lock releasing metal member 44 has a C-shaped cross section in a direction orthogonal to the longitudinal direction, and engages with the flange portion of the second locking lock pin 48 on both sides of the sliding long hole 50. A second parallel cam edge 54 is formed, and at the lower end, engages with the flange of the first lock pin 36 with the flange and resists the elastic force of the first spring 38 to the inside of the pipe. A first parallel cam edge 56 is formed for withdrawal. Further, the upper end portion of the lock release fitting 44 is connected to the lower end portion of the connecting rod 58 inserted through the tip pipe 40. The upper end of each tip pipe 40 is capped with each cap 62 connected by a handle grip 60, and the connecting rod 58 is lowered between the inner back surface of the cap 62 and the upper end of the connecting rod 58. A spring 64 for urging the spring is interposed. Below the handle grip 60, a long hole 66 is formed in the tip pipe 40 along the axial direction at a position where the handle grip 60 can be held with one hand and parallel to the handle grip 60. A movable handle 68, which extends through the tip pipe 40 and has both ends connected to the left and right connecting rods 58, is provided. Both ends of the movable handle 68 are covered with an operating grip 72 integrally formed with a pair of cylindrical portions 70, 70 slidably fitted on the tip pipes 40. Incidentally, reference numeral 80 in the figure is a handle support column constituted by the basic pipe 20, the intermediate pipe 30, and the tip pipe 40. Although not shown, each pipe is provided with a stopper.

When contracting the handle column 80 of the above-mentioned carrying cart, first, the handle grip 60 and the operating grip 72 are grasped with one hand, and the operating grip 72 is applied while applying downward force to the handle grip 60. To the handle grip 60. As a result, the movable handle 68 inside the operation grip 72 moves upward along the elongated hole 66 against the elastic force of the spring 64. Since the movable handle 68 is connected to the connecting rod 58, the upward movement of the movable handle 68 pulls up the connecting rod 58, and the lock releasing metal member 44 connected to the connecting rod 58 moves upward. To do. By the upward movement of the lock releasing metal fitting 44, the second parallel cam edge 54 of the lock releasing metal fitting 44 pulls the lock pin 48 with the second brim against the elastic force of the second spring 52 into the pipe. The engagement between the tip of the second lock pin 48 with the flange and the second locking hole 34 of the intermediate pipe 30 is released, and the tip pipe 40 is housed in the intermediate pipe 30 by the downward pushing force. become. Immediately before the end pipe 40 is completely stored in the intermediate pipe 30, the first parallel cam edge 56 at the lower end portion of the unlocking metal fitting 44 has the flange portion of the first flanged lock pin 36 and the intermediate pipe 30. Then, the lock pin 36 with the first collar is pulled inward against the inner wall surface of the pipe against the elastic force of the first spring 38. As a result, the engagement between the front end portion of the first flanged lock pin 36 and the first locking hole 26 of the base pipe 20 is released, and the downward pressing force causes the intermediate pipe 30 to move. It is stored inside, and the strut 80 for the handle is contracted. On the other hand, when the handle support column 80 in the contracted state is extended, if the base body 16 is held down by one foot and fixed, and the handle grip 60 is held with one hand and simply pulled up, the pipes Slides to expand the handle column 80, the lock pin 36 with the first collar, which is spring-biased by the first spring, automatically fits into the first locking hole, and the second spring 46 causes the spring to spring. The biased second lock pin 48 with the collar automatically fits into the second locking hole 34 and is locked. It should be noted that when the handle support column 80 is contracted and the load carrying section 10 is folded, the carrying cart is carried while holding the carrying grip 22 with one hand.

Although the above-described configuration is known, the carrying cart according to the present invention will be described below in order to prevent the tip pipe 40 from coming off from the intermediate pipe 30 when the lock is released. It is equipped with such a mechanism.

In this carrying cart, a storage hole 84 is formed in the vicinity of the lower end of the tip pipe 40 at a position facing the second pin hole 42, and a second locking is provided in the vicinity of the upper end of the intermediate pipe 30. An engagement hole 86 is formed at a position opposed to the hole 34 and overlaps the storage hole 84 of the tip pipe 40 when the second pin hole 42 of the tip pipe 40 and the second locking hole 34 of the intermediate pipe 30 overlap each other. Has been done. The other end of the second spring 46, to which the second locking pin 48 with the second collar is fixed, is horizontally (ie, may be acute) to the pipe outer side at a right angle to the axial direction of the pipe wall surface. After being bent inward, it is bent obliquely downward and inward, and an engaging protrusion 82 is integrally formed at the other end of the second spring 46. When the engagement projection 82 is always accommodated in the accommodation hole 84 of the tip pipe 40 and the second pin hole 42 of the tip pipe 40 and the second locking hole 34 of the intermediate pipe 30 overlap each other. Further, the tip pipe 40 is adapted to project outward from the outer wall surface of the tip pipe 40 and be fitted into the engagement hole 86 of the intermediate pipe 30. The engaging projection 82 is constantly urged toward the pipe outer side by the elastic force of the second spring 46.

In the carrying cart having the above-described structure, the operation grip 72 is operated as described above while the handle support column 80 is extended as shown in FIG. 1, and the lock pin with the second collar is operated. As shown in FIG. 5 (a), even if the valve 48 is pulled inward to release the engagement between the front end portion of the second lock pin 48 with the flange and the second locking hole 34 of the intermediate pipe 30. The engagement protrusion 82 remains fitted in the engagement hole 86 of the intermediate pipe 30. In this state, when a force is applied in the direction of pulling up the tip pipe 40, that is, in the direction of pulling out the tip pipe 40 from the intermediate pipe 30, the tip pipe is made perpendicular to the wall surface of the intermediate pipe 30 of the engaging protrusion 82. The upper side portion of the outer wall of the outer pipe 40, which protrudes outward, abuts and engages with the inner peripheral upper edge of the engaging hole 86 of the intermediate pipe 30, so that the tip pipe 40 faces upward with respect to the intermediate pipe 30. The movement to move is stopped. Therefore, the tip pipe 40 does not come off from the intermediate pipe 30. On the other hand, when the handle grip 60 is pushed down in order to contract the handle strut 80, when the handle grip 60 is pushed down, the lower side of the engaging protrusion 82 is the inner peripheral lower edge of the engaging hole 86 of the intermediate pipe 30. 5A, the lower edge portion is slid downwardly inward from the upper edge portion, so that the lower edge portion slidably contacts the inner peripheral lower edge portion of the engagement hole 86, and is shown in FIG. 5B. As described above, the engaging protrusion 82 is recessed inward from the outer wall surface of the tip pipe 40 against the elastic force of the second spring 46. Therefore, like the conventional carrying cart, the tip pipe 40 is stored in the intermediate pipe 30 without any trouble.

The carrying cart according to the present invention is configured as described above, but the scope of the present invention is not limited by the above description and the contents of the drawings, and various modifications can be made without departing from the scope of the invention. Variations may be included. That is, the shape of the handle column, the configuration of each pipe, and the detailed configuration of the lock mechanism of each pipe are not limited to the illustrated examples. For example, in the illustrated example, the intermediate pipe is inserted into the basic pipe, but the basic pipe is inserted into the intermediate pipe, and accordingly, the first spring and the first lock pin with a collar are attached to the basic pipe side. You may make it arrange | position. Further, in the illustrated example, the spring for urging the second lock pin with flange is extended to form the engaging member (engaging protrusion) at its end, but they are formed as separate members. The engaging member may be biased by another spring member.

[0020]

[Effect of device]

 Since the present invention is constructed and operates as described above, the carrying cart according to the present invention mistakenly operates the operation grip (movable handle) when moving a heavy load on the loading section. Even if it is grasped, or when the handle strut in the extended state is contracted, and if an upward force is accidentally applied to the operating grip in the unlocked state, each pipe of the handle strut There is no concern that they will fall apart, and the cart function will be maintained. The contraction operation of the handle support column in the extended state can be easily performed by the same operation as the conventional one without any trouble.

[Brief description of drawings]

FIG. 1 is a partial front view of a carrying cart according to an embodiment of the present invention, showing a pair of handle columns in an extended state in a partial cross section.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a front view of the portable cart shown in FIG. 1 in an extended state in which a part of the entire cart is omitted.

FIG. 4 is a side view of the carrying cart shown in FIG. 1 in an extended state, in which a part of the entire cart is omitted.

FIG. 5 is a longitudinal sectional view of an essential part for explaining the operation of the mechanism for preventing the tip pipe from coming off from the intermediate pipe.

FIG. 6 is a perspective view of an upper portion of a handle column of a carrying cart in an operating state.

[Explanation of symbols]

 10 Loading section 12 Wheel 16 Base 18 Folding shaft 20 Foundation pipe 30 Intermediate pipe 34 Second locking hole 40 Tip pipe 42 Second pin hole 44 Lock release fitting 46 Second spring 48 Lock pin with second collar 54 Second 2 Parallel cam edge 58 Continuous rod 60 Handle grip 64 Spring 68 Movable handle 72 Operation grip 80 Handle bar 82 Engagement protrusion (engagement member) 84 Tip pipe storage hole 86 Intermediate pipe engagement hole

Claims (2)

[Scope of utility model registration request] 1. An intermediate pipe is slidably inserted into the lower end side of the tip pipe, and a base pipe is slidably inserted into the lower end side of the intermediate pipe so that the entire length is expandable and contractable parallel to each other. A pair of handle struts, a handle grip that connects the upper end portions of the tip pipes of the pair of handle struts, and a lower end portion of the base pipe of the pair of handle struts are fixed, and a pair of left and right A base body having wheels, and a load-carrying portion which is supported by the base body in a cantilever manner and is rotatable between a position opened forward with respect to the handle support column and a position overlapping the handle support column, A lock and unlocking means for locking and unlocking the pipes so that they do not slide when the handle strut is extended; and the intermediate pipe and the tip pipe. The locking means has a locking hole formed near the upper end of the intermediate pipe, a pin hole formed near the lower end of the tip pipe at the same circumferential position as the locking hole, and the pin hole. And the locking hole are overlapped with each other, the lock pin with a collar inserted into the pin hole and the locking hole from the inside of the pipe, and the lock pin fixedly supported in the pipe and urged to the outside of the pipe. And a lock releasing means for retracting the locking pin with the collar against the elastic force of the spring so that the tip end of the locking pin with the collar is pulled out from the locking hole of the intermediate pipe. In the carrying cart described above, in the vicinity of the lower end of the tip pipe, an engaging member that elastically protrudes outward from the outer wall surface of the tip pipe is arranged, and in the vicinity of the upper end of the intermediate pipe, Pin hole and above An engaging hole is formed in which the protruding portion of the engaging member fits when the hole overlaps, and the upper side portion of the protruding portion of the engaging member engages with the inner peripheral upper edge portion of the engaging hole. Is formed at a right angle or an acute angle with respect to the axial direction of the wall surface of the intermediate pipe so that the engaged state is maintained, and the tip pipe is slid downward with respect to the intermediate pipe by the engaging member. A guide side that engages with the lower edge of the inner periphery of the engaging hole and slides so that the projecting portion of the engaging member retracts inward from the outer wall surface of the tip pipe against the elastic force. A carrying cart characterized by being formed. 2. A spring for urging the locking pin with a flange toward the outside of the pipe is a linear spring having one end fixed to the locking pin with the flange and arranged in the tip pipe. When the other end is bent to form an engaging member, and the protruding portion of the engaging member is housed in the vicinity of the lower end of the tip pipe, and the pin hole of the tip pipe and the locking hole of the intermediate pipe overlap each other. The carrying cart according to claim 1, wherein a storage hole that overlaps with the engagement hole of the intermediate pipe is formed in the.