JP2015147521A - hand cart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand cart in which a possibility that a handle may be stretched without intention of a user is reduced.SOLUTION: When an operating part 112 is pressed, a front pressing member 162 and a rear pressing member 162 are moved in a first direction so that a front pin 163 and a rear pin 163 are moved to insides of a front lower pipe 122F and a rear lower pipe 122R. While the operating part 112 is not pressed, the front pressing member 162 and the rear pressing member 162 are moved in a second direction so that the front pin 163 and the rear pin 163 are fastened in a state of penetrating through a first height adjustment hole 122X and a second height adjustment hole 122X.

Description

  The present invention relates to a push cart on which a travel bag or a shopping bag can be placed, and more particularly, to a push cart that can change the height of a handle.

  Traditionally, hand carts have been used to carry travel bags and other heavy and bulky items. The hand cart has a loading platform, a plurality of wheels attached to the lower surface of the loading platform, and a handle erected on the upper surface of the loading platform.

  For example, Japanese Patent Laid-Open No. 8-244617 (Patent Document 1) discloses a carrying cart in which a handle pipe can be easily expanded and contracted. According to Patent Document 1, one end of the handle grip is fixed to the handle pipe and is rotatable with respect to the circumferential direction of the handle grip. The handle pipe includes a motion conversion means for converting a rotational motion of a piston crank mechanism or the like into a linear motion, and includes a linkage that is slidable along the longitudinal direction. In the motion conversion means, the rotating part is the same body as the handle grip, and rotates together with the rotation of the handle grip to slide the sliding part. One end of the linkage is connected to the sliding portion of the motion converting means, and the other end is connected to the unlocking means. For this reason, by turning the wrist of the hand while holding the handle grip, the handle grip is rotated and the linkage is slid to operate the unlocking means.

  Japanese Utility Model Laid-Open No. 7-40351 (Patent Document 2) discloses a carrying cart in which the pipes of the handle pipes do not come off even when the operation grip is erroneously operated when the carrying cart is moved. It is disclosed. According to Patent Document 2, an engagement protrusion that elastically protrudes outward from the outer wall surface is disposed near the lower end of the tip pipe, and a pin hole and a locking hole are disposed near the upper end of the intermediate pipe. An engagement hole into which the engagement protrusion fits when the two overlap is formed. The upper side of the engagement protrusion is formed so as to engage with the upper edge of the inner periphery of the engagement hole and the engagement state is maintained, and the lower side of the engagement protrusion is used as the intermediate pipe. The engagement protrusion engages with the inner peripheral lower edge portion of the engagement hole so that the engagement protrusion immerses inward from the outer wall surface of the tip pipe against the elastic force when sliding downward with respect to It is formed on the guide side that is in sliding contact.

JP-A-8-244617 Japanese Utility Model Publication No. 7-40351

  However, in the carrying carts described in Patent Document 1 and Patent Document 2, when the bag hits the pin or when the hand hits the pin, the pin may enter the locking hole. There was a risk that the handle would expand and contract even though it was not intended.

  The present invention has been made to solve such a problem, and an object of the present invention is to reduce the possibility that the handle will expand and contract even though the user does not intend.

  According to one aspect of the present invention, a cart is provided that includes a loading platform for placing a bag, wheels attached to the lower surface of the loading platform, and a handle attached to the upper surface of the loading platform. The handle is erected directly or indirectly on the front part of the upper surface of the cargo bed, and includes a front lower pipe in which a plurality of first height adjustment holes are formed on a side surface, and a rear part of the upper surface of the cargo bed. A rear lower pipe that is vertically or indirectly erected and has a plurality of second height adjustment holes formed on its side surface, and a front upper pipe that moves up and down by sliding relative to the front lower pipe, A rear upper pipe that moves in the vertical direction by sliding relative to the rear lower pipe; a handle grip that is directly or indirectly connected to an upper part of the front upper pipe and an upper part of the rear upper pipe; It moves in the vertical direction in conjunction with the front upper pipe, moves in the vertical direction in conjunction with the front pin inserted into the first height adjustment hole, and the rear upper pipe, and moves in the second height. With rear pin inserted through the adjustment hole A front extrusion member for fixing the front pin in a state of passing through the first height adjustment hole, and a rear extrusion member for fixing the rear pin in a state of passing through the second height adjustment hole And an operating portion connected directly or indirectly to the front push member and the rear push member. When the operation portion is pushed, the front push member and the rear push member move in the first direction, so that the front pin and the rear pin are inside the front lower pipe and the rear lower pipe. Moving. When the operation portion is not pushed, the front push member and the rear push member move in the second direction, so that the front pin and the rear pin have the first height adjusting hole and the first push hole. It fixes in the state which penetrated 2 height adjustment holes.

  Preferably, the front push member has a first push portion for fixing the front pin to the surface on the first height adjustment hole side in a state of penetrating the first height adjustment hole, And a first recess for retracting the front pin from the first height adjustment hole. The rear push member includes a second push portion for fixing the rear pin to the surface on the second height adjustment hole side in a state of passing through the second height adjustment hole, and the rear pin. And a second recess for retracting the second height adjusting hole from the second height adjusting hole.

  Preferably, the front pushing member has a third surface for placing the front pin through the first height adjusting hole on a surface opposite to the surface on the first height adjusting hole side. A recess, and a third push-out portion for moving the front pin in a direction in which the front pin is retracted from the first height adjustment hole. The rear pushing member has a fourth recess for bringing the rear pin through the second height adjusting hole on a surface opposite to the surface on the first height adjusting hole side; A fourth push-out portion for moving the rear pin in a direction in which the rear pin is retracted from the second height adjustment hole.

  Preferably, the third pushing portion is a slope formed on a surface of the front pushing member opposite to the surface on the first height adjusting hole side. The fourth extruding portion is a slope formed on a surface of the rear extruding member on the opposite side of the surface on the second height adjusting hole side.

  Preferably, the front pushing member is slidable on the inner side of the front pin, and an inclined surface is formed on the inner peripheral surface of the front pin opposite to the front end of the front pin. The rear pushing member is slidable on the inner side of the rear pin, and an inclined surface is formed on the inner peripheral surface of the rear pin opposite to the tip of the rear pin.

  Preferably, tips of the front pin and the rear pin are tapered.

  As described above, according to the present invention, it is possible to provide a hand-held card with a reduced possibility that the handle will expand and contract even though the user does not intend.

1 is an overall perspective view of a hand cart 100 according to the present embodiment. It is a side view of the hand cart 100 concerning this Embodiment. It is a front sectional view of upper pipe 121 and lower pipe 122 of handle 105 concerning this embodiment. It is an expanded front sectional view of the portion where upper pipe 121 and lower pipe 122 concerning this embodiment overlap. It is a side view of the handlebar grip 110 concerning this Embodiment. It is side surface sectional drawing of the handlebar grip 110 concerning this Embodiment. It is a perspective view of the slide restriction | limiting mechanism 160 in the non-slidable state concerning 1st Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 160 in the non-slidable state concerning 1st Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 160 in the non-slidable state concerning 1st Embodiment. It is an AA arrow sectional view in Drawing 8 of slide restriction mechanism 160 in the non-slidable state concerning a 1st embodiment. It is BB arrow sectional drawing in FIG. 9 of the slide restriction | limiting mechanism 160 in the non-slidable state concerning 1st Embodiment. It is a perspective view of the mechanism outer member 161 concerning 1st Embodiment. It is a front sectional view of mechanism outside member 161 concerning a 1st embodiment. It is a perspective view of the mechanism internal member 162 concerning 1st Embodiment. It is a perspective view of pin 163 concerning a 1st embodiment. It is a top view of pin 163 concerning a 1st embodiment. It is a perspective view of the slide restriction | limiting mechanism 160 in the slidable state concerning 1st Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 160 in the slidable state concerning 1st Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 160 in the slidable state concerning 1st Embodiment. It is AA arrow sectional drawing in FIG. 18 of the slide restriction | limiting mechanism 160 in the slidable state concerning 1st Embodiment. FIG. 20 is a cross-sectional view of the slide limiting mechanism 160 in a slidable state according to the first embodiment, as viewed in the direction of arrows BB in FIG. 19. It is a perspective view of the slide restriction | limiting mechanism 260 in the non-slidable state concerning 2nd Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 260 in the non-slidable state concerning 2nd Embodiment. It is a 2nd side view of the slide restriction mechanism 260 in the non-slidable state concerning 2nd Embodiment. It is AA arrow sectional drawing in FIG. 23 of the slide restriction | limiting mechanism 260 in the non-slidable state concerning 2nd Embodiment. It is BB arrow sectional drawing in FIG. 24 of the slide restriction | limiting mechanism 260 in the non-slidable state concerning 2nd Embodiment. It is a front sectional view of member in mechanism 162 concerning a 2nd embodiment. It is a perspective view of the slide restriction | limiting mechanism 260 in the slidable state concerning 2nd Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 260 in the slidable state concerning 2nd Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 260 in the slidable state concerning 2nd Embodiment. It is AA arrow sectional drawing in FIG. 29 of the slide restriction | limiting mechanism 260 in the slidable state concerning 2nd Embodiment. It is BB arrow sectional drawing in FIG. 30 of the slide restriction | limiting mechanism 260 in the slidable state concerning 2nd Embodiment. It is a perspective view of the slide restriction | limiting mechanism 360 in the non-slidable state concerning 3rd Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 360 in the non-slidable state concerning 3rd Embodiment. It is a 2nd side view of the slide restriction mechanism 360 in the non-slidable state concerning 3rd Embodiment. It is AA arrow sectional drawing in FIG. 34 of the slide restriction | limiting mechanism 360 in the non-slidable state concerning 3rd Embodiment. It is BB arrow sectional drawing in FIG. 35 of the slide restriction | limiting mechanism 360 in the non-slidable state concerning 3rd Embodiment. It is a perspective view of pin 363 concerning a 3rd embodiment. It is a perspective view of the slide restriction | limiting mechanism 360 in the slidable state concerning 3rd Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 360 in the slidable state concerning 3rd Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 360 in the slidable state concerning 3rd Embodiment. It is an AA arrow sectional view in Drawing 40 of slide restriction mechanism 360 in a slidable state concerning a 3rd embodiment. It is a BB arrow sectional view in Drawing 41 of slide restriction mechanism 360 in a slidable state concerning a 3rd embodiment. It is a perspective view of the slide restriction | limiting mechanism 460 in the non-slidable state concerning 4th Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 460 in the non-slidable state concerning 4th Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 460 in the non-slidable state concerning 4th Embodiment. It is AA arrow sectional drawing in FIG. 45 of the slide restriction | limiting mechanism 460 in the non-slidable state concerning 4th Embodiment. It is a BB arrow sectional view in Drawing 46 of slide restriction mechanism 460 in a non-slidable state concerning a 4th embodiment. It is front sectional drawing of the member 162 in a mechanism concerning 4th Embodiment. It is a perspective view of the slide restriction | limiting mechanism 460 in the slidable state concerning 4th Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 460 in the slidable state concerning 4th Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 460 in the slidable state concerning 4th Embodiment. It is AA arrow sectional drawing in FIG. 51 of the slide restriction | limiting mechanism 460 in the slidable state concerning 4th Embodiment. It is a BB arrow sectional view in Drawing 52 of slide restriction mechanism 460 in a slidable state concerning a 4th embodiment. It is a 1st side view of the slide restriction | limiting mechanism 560 in the non-slidable state concerning 5th Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 560 in the non-slidable state concerning 5th Embodiment. It is AA arrow sectional drawing in FIG. 55 of the slide restriction | limiting mechanism 560 in the non-slidable state concerning 5th Embodiment. It is BB arrow sectional drawing in FIG. 56 of the slide restriction | limiting mechanism 560 in the non-slidable state concerning 5th Embodiment. It is a perspective view of pin 563 concerning a 5th embodiment. It is a 1st side view of the slide restriction | limiting mechanism 560 in the slidable state concerning 5th Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 560 in the slidable state concerning 5th Embodiment. It is AA arrow sectional drawing in FIG. 60 of the slide restriction | limiting mechanism 560 in the slidable state concerning 5th Embodiment. It is BB arrow sectional drawing in FIG. 61 of the slide restriction | limiting mechanism 560 in the slidable state concerning 5th Embodiment. It is a perspective view of the slide restriction | limiting mechanism 660 in the non-slidable state concerning 6th Embodiment. It is a 1st side view of the slide restriction | limiting mechanism 660 in the non-slidable state concerning 6th Embodiment. It is a 2nd side view of the slide restriction mechanism 660 in the non-slidable state concerning 6th Embodiment. It is AA arrow sectional drawing in FIG. 65 of the slide restriction | limiting mechanism 660 in the non-slidable state concerning 6th Embodiment. It is a BB arrow sectional view in Drawing 66 of slide restriction mechanism 660 in the non-slidable state concerning a 6th embodiment. It is a perspective view of the mechanism internal member 162 concerning 6th Embodiment. It is a top view of pin 163 concerning a 6th embodiment. It is a perspective view of the slide restriction | limiting mechanism 660 in the slidable state concerning 6th Embodiment. It is a 1st side view of the slide restriction mechanism 660 in the slidable state concerning 6th Embodiment. It is a 2nd side view of the slide restriction | limiting mechanism 660 in the slidable state concerning 6th Embodiment. It is an AA arrow sectional view in Drawing 72 of slide restriction mechanism 660 in a slidable state concerning a 6th embodiment. It is BB arrow sectional drawing in FIG. 73 of the slide restriction | limiting mechanism 660 in the slidable state concerning 6th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
[First Embodiment]
<Overall configuration>

  First, the overall configuration of the hand cart 100 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is an overall perspective view of the hand cart 100 according to the present embodiment. FIG. 2 is a side view of the hand cart 100 according to the present embodiment.

  The hand cart 100 includes a loading platform 131, a plurality of wheels 140 and 140 attached to the lower surface of the loading platform 131, a handle grip 110, a front upper pipe 121F and a front lower pipe 122F that support the handle grip 110 and are extendable. And a rear upper pipe 121R and a rear lower pipe 122R.

  In the following, the handle grip 110 and the front upper pipe 121F, the front lower pipe 122F, the rear upper pipe 121R, and the rear lower pipe 122R that support the handle grip 110 and can be expanded and contracted are also referred to as the handle 105. For the sake of explanation, the front upper pipe 121F and the rear upper pipe 121R are also collectively referred to as the upper pipe 121. Similarly, the front lower pipe 122F and the rear lower pipe 122R are collectively referred to as a lower pipe 122.

  The upper pipe 121 and the lower pipe 122 have different diameters, and the upper pipe 121 slides in the lower pipe 122 in the present embodiment. Specifically, when the upper pipe 121 and the lower pipe 122 overlap, a state where the handle 105 is contracted, that is, a state where the handle grip 110 is low is realized. Conversely, by pulling out the upper pipe 121 from the lower pipe 122, a state where the handle 105 is extended, that is, a state where the handle grip 110 is high is realized.

  In order to maintain the stretched state, the lower pipe 122 is formed with a plurality of pin holes 122X and 122X in the vertical direction for each height of the handle 105 that can be adjusted by the user. Specifically, first height adjustment holes 122X and 122X are formed in the front lower pipe 122F. And the front pin 163 which slides to the left-right direction is attached to the lower part of the front upper pipe 121F so that it may mention later. Similarly, second height adjusting holes 122X and 122X are also formed in the rear lower pipe 122R. A front pin 163 that slides in the left-right direction is attached to the lower part of the rear upper pipe 121R as will be described later.

  A rib 132 is formed at an end of the loading platform 131 so that a lower end of a travel bag or a shopping bag placed on the loading platform 131 does not fall from the loading platform 131.

In the present embodiment, the handle 105 is erected slightly closer to the rib 132 side than the left and right center of the loading platform 131. Further, a locking member for supporting the travel bag or the shopping bag is provided in the middle or upper part of the front lower pipe 122F and the rear lower pipe 122R so that the travel bag or the shopping bag placed on the loading platform 131 does not fall from the loading platform 131. 125, 125 are formed.
<Handle height adjustment mechanism>

  Next, a height adjustment mechanism of the handle 105 will be described with reference to FIGS. FIG. 3 is a front sectional view of the upper pipe 121 and the lower pipe 122 of the handle 105 according to the present embodiment. FIG. 4 is an enlarged front cross-sectional view of a portion where the upper pipe 121 and the lower pipe 122 according to the present embodiment overlap. FIG. 5 is a side view of the handle grip 110 according to the present embodiment. FIG. 6 is a side sectional view of the handle grip 110 according to the present embodiment.

  An operation button (operation unit) 112 is attached to the upper surface of the handle grip 110 so as to be pressed in the vertical direction. A cover 111 slidable in the front-rear direction is attached to the handle grip 110. With such a configuration, the user can prevent the operation button 112 from being accidentally pressed by moving the cover 111 onto the operation button 112.

  The lower part of the operation button 112 is attached to the front / rear bar 151. A front upper / lower bar 152F is connected to the front end of the front / rear bar 151 downward. A rear upper / lower bar 152R is connected to the rear end of the front / rear bar 151 downward. In the following description, the front upper / lower bar 152F and the rear upper / lower bar 152R are collectively referred to as the upper / lower bar 152 for the sake of explanation.

  A pressing member 153 is attached to the lower end of the upper and lower bar 152. The lower end of the pressing member 153 is in contact with the upper end of a slide limiting mechanism 160 described later. That is, when the user presses the operation button 112, the front / rear bar 151 moves downward, thereby moving the upper / lower bar 152 downward, thereby pushing the upper end of the slide limiting mechanism 160 downward.

  With respect to the slide limiting mechanism 160, the pin 163 is fixed in a state of penetrating the pin hole 122 </ b> X of the lower pipe 122 when not pressed from the upper and lower bars 152. That is, the pin 163 protrudes from the pin hole 122X of the lower pipe 122. In this state, even if a force is applied to the handle grip 110 in the vertical direction, the upper pipe 121 does not slide in the lower pipe 122, and the height of the handle 105 does not change.

On the contrary, when the slide restriction mechanism 160 is pushed from the upper and lower bars 152, the pin 163 moves to the inside of the upper pipe 121 and comes out of the pin hole 122X of the lower pipe 122. Thus, the user can adjust the height of the handle by applying a force to the handle grip 110 and sliding the upper pipe 121 within the lower pipe 122.
<Slide limiting mechanism 160>

  Next, the slide limiting mechanism 160 according to the present embodiment will be described. First, the slide restriction mechanism 160 in a non-slidable state will be described with reference to FIGS. FIG. 7 is a perspective view of the slide limiting mechanism 160 in a non-slidable state according to the present embodiment. FIG. 8 is a first side view of the slide restricting mechanism 160 in the non-slidable state according to the present embodiment. FIG. 9 is a second side view of the slide limiting mechanism 160 in the non-slidable state according to the present embodiment. FIG. 10 is a cross-sectional view taken along line AA in FIG. 8 of the slide limiting mechanism 160 in a non-slidable state according to the present embodiment. FIG. 11 is a cross-sectional view of the slide limiting mechanism 160 in the non-slidable state according to the present embodiment taken along the line BB in FIG. FIG. 12 is a perspective view of the mechanism outer member 161 according to the present embodiment. FIG. 13 is a front sectional view of the mechanism outer member 161 according to the present embodiment. FIG. 14 is a perspective view of the in-mechanism member 162 according to the present embodiment. FIG. 15 is a perspective view of the pin 163 according to the present embodiment. FIG. 16 is a plan view of the pin 163 according to the present embodiment.

  7 to 11, the slide limiting mechanism 160 includes a mechanism outer member 161, a mechanism inner member 162 (a front pushing member for the front upper pipe 121F and a front pushing member for the rear upper pipe 121R), and a pin 163. And a first spring 164 and a second spring 165.

  With reference to FIGS. 7 to 11, 12, and 13, the mechanism outer member 161 is fixed to the lower end portion of the upper pipe 121 and slides in the lower pipe 122 together with the lower portion of the upper pipe 121. A through-hole 161A is formed in the mechanism outer member 161 in the vertical direction. A mechanism internal member 162, which will be described later, is inserted into the through hole 161A so as to be slidable in the vertical direction. In the mechanism outer member 161, a pin through hole 161B is formed on the wall surface of the lower pipe 122 on the pin hole 122X side. A pin 163 is slidably inserted in the left-right direction through the pin through-hole 161B.

  With reference to FIGS. 7 to 11 and FIG. 14, the inner member 162 of the mechanism is connected to the pressing member 153 at the upper end, and slides in the vertical direction with respect to the outer member 161 according to the movement of the upper and lower bars 152. It is free. The first spring 164 biases the in-mechanism member 162 upward. That is, the mechanism inner member 162 moves downward relative to the mechanism outer member 161 against the urging force of the first spring 164 by being pushed from above by the upper and lower bars 152. On the contrary, when the user does not press the operation button 112, the upper and lower bars 152 are not pushed from the front and rear bars 151, and thus move upward of the mechanism outer member 161 by the force of the first spring 164.

  The outer peripheral surface 162B (the first pushing portion of the front upper pipe 121F and the second pushing portion of the rear upper pipe 121R) on the pin hole 122X side (the left side of the hand cart 100) on the lower side of the inner member 162 is the inner member. 162 protrudes into the pin hole 122X from the outer peripheral surface on the side of the pin hole 122X in the middle (the first concave portion of the front upper pipe 121F and the second concave portion of the rear upper pipe 121R). The outer peripheral surface 162C on the side opposite to the pin hole 122X on the lower part of the mechanism inner member 162 (the right side of the hand cart 100) is more pinned than the outer peripheral surface on the side opposite to the pin hole 122X in the middle of the mechanism inner member 162. (The third recess of the front upper pipe 121F and the fourth recess of the rear upper pipe 121R). In the present embodiment, an inclined surface 162D (a third extruded portion of the front upper pipe 121F and a fourth extruded portion of the rear upper pipe 121R) is formed above the outer peripheral surface 162C.

  7-11, FIG. 15, and FIG. 16, the tip 163A of the pin 163 jumps out of the pin hole 122X of the lower pipe 122 in accordance with the movement (vertical movement) of the in-mechanism member 162 ( The pin hole 122X is penetrated) or the pin hole 122X is retracted. A through hole 163B is formed in the pin 163 in the vertical direction. A slope 163C is formed on the inner peripheral surface of the through hole 163B on the side opposite to the tip 163A (on the right side of the hand cart 100). The lower part of the in-mechanism member 162 is slidably inserted in the through hole 163B in the vertical direction.

  The tip 163A of the pin 163 according to the present embodiment is formed in a tapered shape so as to easily enter and exit the pin hole 122X. Thus, as will be described later, when the user does not press the operation button 112, the user presses the operation button 112 while reducing the possibility that the pin 163 is accidentally retracted from the pin hole 122 </ b> X by being pressed by the in-mechanism member 162. When is pressed, the pin 163 can smoothly enter and exit the pin hole 122. Specifically, only the tip portion of the tip 163A may be tapered, or the tip 163A itself may have a tapered shape as a whole.

  As shown in FIGS. 7 to 11, the outer periphery of the mechanism inner member 162 is in contact with the inner periphery of the mechanism outer member 161, and the outer periphery of the mechanism outer member 161 is in contact with the inner periphery of the upper pipe 121. When the in-mechanism member 162 is not pushed downward by the upper and lower bars 152, the pin 163 is pushed by the lower part of the in-mechanism member 162 from the inside of the through hole 163B toward the pin hole 122X. Therefore, even if the user's hand or bag pushes the pin 163, the pin 163 is pushed by the in-mechanism member 162, and therefore does not retract into the upper pipe 121, that is, does not come out of the pin hole 122X. This prevents the pin 163 from accidentally coming out of the pin hole 122X and the upper pipe 121 from sliding in the lower pipe 122. That is, when the user does not intend, the height of the handle 105 does not change.

  The second spring 165 biases the pin 163 toward the pin hole 122X of the lower pipe 122.

  Next, the slide restriction mechanism 160 in the slidable state will be described. FIG. 17 is a perspective view of the slide limiting mechanism 160 in the slidable state according to the present embodiment. FIG. 18 is a first side view of the slide limiting mechanism 160 in the slidable state according to the present embodiment. FIG. 19 is a second side view of the slide limiting mechanism 160 in the slidable state according to the present embodiment. FIG. 20 is a cross-sectional view taken along line AA in FIG. 18 of the slide limiting mechanism 160 in the slidable state according to the present embodiment. FIG. 21 is a cross-sectional view taken along the line BB in FIG. 19 of the slide limiting mechanism 160 in the slidable state according to this embodiment.

Referring to FIGS. 17 to 21, contrary to the cases of FIGS. 7 to 11, when the mechanism inner member 162 is pushed down, the inner periphery of the through-hole 163 </ b> B of the pin 163 is the mechanism inner member 162. It is not pushed from the outer peripheral surface 162B of the lower part of. The inclined surface 163C of the pin 163 is pushed in the direction opposite to the pin hole 122X by the inclined surface 162D of the lower part of the in-mechanism member 162. As a result, the pin 163 moves in the direction opposite to the pin hole 122X. That is, the tip 163A of the pin 163 is removed from the pin hole 122X. As a result, the user can freely change the height of the handle 105.
[Second Embodiment]

Next, a second embodiment of the height adjustment mechanism of the handle 105 will be described. The overall configuration of the hand cart 100 and the handle height adjustment mechanism are the same as those in the first embodiment, and thus description thereof will not be repeated here.
<Slide restriction mechanism 260>

  Below, the slide restriction | limiting mechanism 260 concerning this Embodiment is demonstrated. First, with reference to FIGS. 22 to 27, the slide restriction mechanism 260 in a non-slidable state will be described. FIG. 22 is a perspective view of the slide limiting mechanism 260 in a non-slidable state according to the present embodiment. FIG. 23 is a first side view of the slide limiting mechanism 260 in the non-slidable state according to the present embodiment. FIG. 24 is a second side view of the slide limiting mechanism 260 in the non-slidable state according to the present embodiment. FIG. 25 is a cross-sectional view taken along the line AA in FIG. 23 of the slide limiting mechanism 260 in the non-slidable state according to the present embodiment. FIG. 26 is a cross-sectional view taken along the line BB in FIG. 24 of the slide limiting mechanism 260 in a non-slidable state according to the present embodiment. FIG. 27 is a front sectional view of the in-mechanism member 162 according to the present embodiment.

  With reference to FIGS. 22 to 26, the slide limiting mechanism 260 includes a mechanism outer member 261, a mechanism inner member 262, a pin 263, a first spring 264, and a second spring 265.

  With reference to FIGS. 22 to 26, 12, and 13, mechanism outer member 261 is similar to mechanism outer member 161 of the first embodiment, and therefore description thereof will not be repeated here.

  Referring to FIGS. 22 to 26 and FIG. 27, the mechanism inner member 262 has an upper end connected to the pressing member 153 and slides up and down with respect to the mechanism outer member 261 in accordance with the movement of the upper and lower bars 152. It is free. The first spring 264 biases the in-mechanism member 262 upward. That is, the mechanism inner member 262 moves downward relative to the mechanism outer member 261 against the urging force of the first spring 264 by being pushed from above by the upper and lower bars 152. On the other hand, when the user does not press the operation button 112, the upper and lower bars 152 are not pressed from the front and rear bars 151, and thus move upward of the mechanism outer member 261 by the force of the first spring 264.

  An outer peripheral surface 262B on the pin hole 122X side (left side of the hand cart 100) on the lower side of the mechanism inner member 262 protrudes from the outer peripheral surface on the pin hole 122X side of the inner portion of the mechanism inner member 262 in the pin hole 122X. The outer peripheral surface 262C on the opposite side to the pin hole 122X on the lower side of the mechanism inner member 262 (the right side of the hand cart 100) is more pinned than the outer peripheral surface on the opposite side to the pin hole 122X in the middle of the mechanism inner member 262. Indented. In the present embodiment, the upper part of the outer peripheral surface 162C is formed not horizontally but horizontally.

  With reference to FIGS. 22 to 26, FIGS. 15 and 16, pin 263 is similar to pin 163 of the first embodiment, and therefore description thereof will not be repeated here.

  22 to 26, the outer periphery of the mechanism inner member 262 is in contact with the inner periphery of the mechanism outer member 261, and the outer periphery of the mechanism outer member 261 is in contact with the inner periphery of the upper pipe 121. When the in-mechanism member 262 is not pushed downward by the upper and lower bars 152, the pin 263 is pushed by the lower part of the in-mechanism member 262 from the inside of the through hole 263B toward the pin hole 122X. Therefore, even if the user's hand or bag presses the pin 263, the pin 263 is pushed by the in-mechanism member 262, and therefore does not retract into the upper pipe 121, that is, does not come out of the pin hole 122X. As a result, the pin 263 is not accidentally pulled out of the pin hole 122X, and the upper pipe 121 does not slide in the lower pipe 122. That is, when the user does not intend, the height of the handle 105 does not change.

  The second spring 265 urges the pin 263 toward the pin hole 122X of the lower pipe 122.

  Next, the slide restriction mechanism 260 in the slidable state will be described. FIG. 28 is a perspective view of the slide limiting mechanism 260 in the slidable state according to the present embodiment. FIG. 29 is a first side view of the slide limiting mechanism 260 in the slidable state according to the present embodiment. FIG. 30 is a second side view of the slide restricting mechanism 260 in the slidable state according to the present embodiment. 31 is a cross-sectional view taken along the line AA in FIG. 29 of the slide limiting mechanism 260 in the slidable state according to the present embodiment. FIG. 32 is a cross-sectional view of the slide limiting mechanism 260 in the slidable state according to the present embodiment, taken along the line BB in FIG.

Referring to FIGS. 28 to 32, contrary to the case of FIGS. 22 to 26, when the inner member 262 is pushed downward, the inner periphery of the through hole 263 </ b> B of the pin 263 is It will not be pushed from the lower outer peripheral surface 262B. The inclined surface 263C of the pin 263 is pushed in the opposite direction of the pin hole 122X by the lower corner portion 262D of the in-mechanism member 262. As a result, the pin 263 moves in the direction opposite to the pin hole 122X. That is, the tip 263A of the pin 263 is removed from the pin hole 122X. As a result, the user can freely change the height of the handle.
[Third Embodiment]

Next, a third embodiment of the height adjusting mechanism of the handle 105 will be described. The overall configuration of the hand cart 100 and the handle height adjustment mechanism are the same as those in the first embodiment, and thus description thereof will not be repeated here.
<Slide limiting mechanism 360>

  Below, the slide restriction | limiting mechanism 360 concerning this Embodiment is demonstrated. First, the slide restriction mechanism 360 in the non-slidable state will be described with reference to FIGS. FIG. 33 is a perspective view of the slide limiting mechanism 360 in a non-slidable state according to the present embodiment. FIG. 34 is a first side view of the slide limiting mechanism 360 in the non-slidable state according to the present embodiment. FIG. 35 is a second side view of the slide limiting mechanism 360 in the non-slidable state according to the present embodiment. FIG. 36 is a cross-sectional view taken along line AA in FIG. 34 of the slide limiting mechanism 360 in a non-slidable state according to the present embodiment. FIG. 37 is a cross-sectional view taken along the line B-B in FIG. 35 of the slide limiting mechanism 360 in a non-slidable state according to this embodiment. FIG. 38 is a perspective view of the pin 363 according to the present embodiment.

  Referring to FIGS. 33 to 36, the slide limiting mechanism 360 includes a mechanism outer member 361, a mechanism inner member 362, a pin 363, a first spring 364, and a second spring 365.

  Referring to FIGS. 33 to 36, 12, and 13, mechanism outer member 361 is similar to mechanism outer member 161 of the first embodiment, and therefore description thereof will not be repeated here.

  With reference to FIGS. 33 to 36 and FIG. 14, the in-mechanism member 362 is the same as the in-mechanism member 162 of the first embodiment, and therefore description thereof will not be repeated here.

  33 to 36 and 38, the tip 363A of the pin 363 jumps out of the pin hole 122X of the lower pipe 122 to the outside (the pin hole 122X) in accordance with the movement (vertical movement) of the in-mechanism member 362. Or withdrawn from the pin hole 122X. A through hole 363B is formed in the pin 363 in the vertical direction. A slope is not formed in the through hole 363B according to the present embodiment. The lower part of the in-mechanism member 362 is inserted into the through hole 363B so as to be slidable in the vertical direction.

  As shown in FIGS. 33 to 36, the outer periphery of the mechanism inner member 362 is in contact with the inner periphery of the mechanism outer member 361, and the outer periphery of the mechanism outer member 361 is in contact with the inner periphery of the upper pipe 121. When the in-mechanism member 362 is not pushed downward by the upper and lower bars 152, the pin 363 is pushed by the lower part of the in-mechanism member 362 from the inside of the through hole 363B toward the pin hole 122X. Therefore, even if the user's hand or bag pushes the pin 363, the pin 363 is pushed by the in-mechanism member 362, and therefore does not retract into the upper pipe 121, that is, does not come out of the pin hole 122X. This prevents the pin 363 from accidentally coming out of the pin hole 122X and the upper pipe 121 from sliding in the lower pipe 122. That is, when the user does not intend, the height of the handle 105 does not change.

  Note that the second spring 365 biases the pin 363 toward the pin hole 122X of the lower pipe 122.

  Next, the slide restriction mechanism 360 in the slidable state will be described. FIG. 39 is a perspective view of the slide limiting mechanism 360 in the slidable state according to the present embodiment. FIG. 40 is a first side view of the slide limiting mechanism 360 in the slidable state according to the present embodiment. FIG. 41 is a second side view of the slide limiting mechanism 360 in the slidable state according to the present embodiment. 42 is a cross-sectional view taken along the line AA in FIG. 40 of the slide limiting mechanism 360 in the slidable state according to the present embodiment. 43 is a cross-sectional view taken along the line BB in FIG. 41 of the slide limiting mechanism 360 in the slidable state according to the present embodiment.

Referring to FIGS. 39 to 42, contrary to the case of FIGS. 33 to 37, when the inner member 362 is pushed downward, the inner periphery of the through hole 363 </ b> B of the pin 363 is It is not pushed from the lower outer peripheral surface 362B. The wall surface of the pin 363 opposite to the tip 363A of the through hole 363B is pushed in the opposite direction of the pin hole 122X by the inclined surface 362D of the lower part of the in-mechanism member 362. As a result, the pin 363 moves in the direction opposite to the pin hole 122X. That is, the tip 363A of the pin 363 is removed from the pin hole 122X. As a result, the user can freely change the height of the handle.
[Fourth Embodiment]

Next, a fourth embodiment of the height adjustment mechanism of the handle 105 will be described. The overall configuration of the hand cart 100 and the handle height adjustment mechanism are the same as those in the first embodiment, and thus description thereof will not be repeated here.
<Slide limiting mechanism 460>

  Below, the slide restriction | limiting mechanism 460 concerning this Embodiment is demonstrated. First, with reference to FIGS. 44 to 49, the slide limiting mechanism 460 in the non-slidable state will be described. FIG. 44 is a perspective view of the slide limiting mechanism 460 in the non-slidable state according to the present embodiment. FIG. 45 is a first side view of the slide limiting mechanism 460 in the non-slidable state according to the present embodiment. FIG. 46 is a second side view of the slide restricting mechanism 460 in the non-slidable state according to the present embodiment. FIG. 47 is a cross-sectional view taken along the line AA in FIG. 45 of the slide limiting mechanism 460 in the non-slidable state according to the present embodiment. FIG. 48 is a cross-sectional view of the slide limiting mechanism 460 in the non-slidable state according to the present embodiment, taken along the line BB in FIG. FIG. 49 is a front sectional view of the in-mechanism member 162 according to the present embodiment.

  44 to 48, the slide limiting mechanism 460 includes a mechanism outer member 461, a mechanism inner member 462, a pin 463, a first spring 464, and a second spring 465.

  44 to 48, FIG. 12, and FIG. 13, since the mechanism outer member 461 is the same as the mechanism outer member 161 of the first embodiment, the description thereof will not be repeated here.

  44 to 48 and FIG. 49, the mechanism internal member 462 is slidable in the vertical direction with respect to the mechanism external member 461 in accordance with the movement of the vertical bar 152. The first spring 464 biases the in-mechanism member 462 upward. That is, the mechanism inner member 462 moves downward relative to the mechanism outer member 461 against the urging force of the first spring 464 by being pushed from above by the upper and lower bars 152. Conversely, when the user does not press the operation button 112, the upper / lower bar 152 is not pressed from the front / rear bar 151, so that the first spring 464 moves upward of the mechanism outer member 461.

  The in-mechanism member 462 is formed with a recess 462E in a portion facing a surface on the tip 463A side of a through hole 463B of a pin 463 described later when it is pushed downward by the upper and lower bars 152. That is, when the in-mechanism member 462 is not pushed by the upper and lower bars 152, the surface on the tip 463A side of the through hole 463B of the pin 463 is on the pin hole 122X side (the left side of the hand cart 100) on the lower side of the in-mechanism member 462. By contacting the outer peripheral surface 462B, the tip 463A of the pin 463 is not retracted from the pin hole 122X.

  The outer peripheral surface 462C on the opposite side to the pin hole 122X at the lower part of the inner member 462 (the right side of the hand cart 100) is more pinned than the outer peripheral surface on the opposite side of the inner pin hole 122X in the inner member 462. Indented. In the present embodiment, a slope 462D is formed above the outer peripheral surface 462C.

  44 to 47, FIG. 15, and FIG. 16, pin 463 is similar to pin 163 of the first embodiment, and therefore description thereof will not be repeated here.

  44 to 47, the outer periphery of the mechanism inner member 462 is in contact with the inner periphery of the mechanism outer member 461, and the outer periphery of the mechanism outer member 461 is in contact with the inner periphery of the upper pipe 121. When the in-mechanism member 462 is not pushed downward by the upper and lower bars 152, the pin 463 is pushed by the lower part of the in-mechanism member 462 from the inside of the through hole 463B toward the pin hole 122X. Therefore, even if the user's hand or bag pushes the pin 463, the pin 463 is pushed by the in-mechanism member 462, and thus does not retract into the upper pipe 121, that is, does not come out of the pin hole 122X. This prevents the pin 463 from accidentally coming out of the pin hole 122X and the upper pipe 121 from sliding in the lower pipe 122. That is, when the user does not intend, the height of the handle 105 does not change.

  The second spring 465 urges the pin 463 toward the pin hole 122X of the lower pipe 122.

  Next, the slide restriction mechanism 460 in the slidable state will be described. FIG. 50 is a perspective view of the slide limiting mechanism 460 in the slidable state according to the present embodiment. FIG. 51 is a first side view of the slide limiting mechanism 460 in the slidable state according to the present embodiment. FIG. 52 is a second side view of the slide restricting mechanism 460 in the slidable state according to the present embodiment. 53 is a cross-sectional view taken along the line AA in FIG. 51 of the slide limiting mechanism 460 in the slidable state according to the present embodiment. 54 is a cross-sectional view of the slide limiting mechanism 460 in the slidable state according to the present embodiment, taken along the line BB in FIG.

Referring to FIGS. 50 to 54, contrary to the cases of FIGS. 44 to 48, when the mechanism inner member 462 is pushed down, the inner periphery of the through hole 463 </ b> B of the pin 463 is It will not be pushed from the lower outer peripheral surface 262B. Then, the inclined surface 463C of the pin 463 is pushed in the direction opposite to the pin hole 122X by the inclined surface 462D below the in-mechanism member 462. That is, the surface on the tip 463A side of the through hole 463B of the pin 463 enters the recess 462E of the in-mechanism member 462. As a result, the pin 463 moves in the direction opposite to the pin hole 122X. That is, the tip 463A of the pin 463 is removed from the pin hole 122X. As a result, the user can freely change the height of the handle.
[Fifth Embodiment]

Next, a fifth embodiment of the height adjustment mechanism of the handle 105 will be described. The overall configuration of the hand cart 100 and the handle height adjustment mechanism are the same as those in the first embodiment, and thus description thereof will not be repeated here.
<Slide limiting mechanism 560>

  Below, the slide restriction | limiting mechanism 560 concerning this Embodiment is demonstrated. First, the slide restriction mechanism 560 in the non-slidable state will be described with reference to FIGS. FIG. 55 is a first side view of the slide limiting mechanism 560 in the non-slidable state according to the present embodiment. FIG. 56 is a second side view of the slide limiting mechanism 560 in the non-slidable state according to the present embodiment. FIG. 57 is a cross-sectional view taken along line AA in FIG. 55 of the slide limiting mechanism 560 in the non-slidable state according to the present embodiment. 58 is a cross-sectional view taken along the line BB in FIG. 56 of the slide restricting mechanism 560 in the non-slidable state according to the present embodiment. FIG. 59 is a perspective view of the pin 563 according to the present embodiment.

  Referring to FIGS. 55 to 58, slide restriction mechanism 560 includes a mechanism outer member 561, a mechanism inner member 562, a pin 563, a first spring 564, and a second spring 565.

  Referring to FIGS. 55 to 58, FIG. 12 and FIG. 13, mechanism outer member 561 is similar to mechanism outer member 161 of the first embodiment, and therefore description thereof will not be repeated here.

  Referring to FIGS. 55 to 58 and FIG. 14, mechanism inner member 562 is similar to mechanism inner member 162 of the first embodiment, and therefore description thereof will not be repeated here.

  55 to 58 and 59, the tip 563A of the pin 563 protrudes from the pin hole 122X of the lower pipe 122 to the outside or retracts from the pin hole 122X in accordance with the movement of the in-mechanism member 562. A hole 563B is formed in the pin 563 in the vertical direction. In the hole 563B according to the present embodiment, a slope 563C is formed on the opposite side of the tip 563A.

  The lower part of the mechanism internal member 562 is inserted into the hole 563B so as to be slidable in the vertical direction. Specifically, the pin 563 extends longer than the pins of the first to fourth embodiments. The pin 563 has a space for accommodating the lower end portion of the in-mechanism member 562 therein. The in-mechanism member 562 is inserted into the space through a hole (hole) 563B.

  As shown in FIGS. 55 to 58, the outer periphery of the mechanism inner member 562 is in contact with the inner periphery of the mechanism outer member 561, and the outer periphery of the mechanism outer member 561 is in contact with the inner periphery of the upper pipe 121. When the in-mechanism member 562 is not pushed downward by the upper and lower bars 152, the pin 563 is pushed by the lower part of the in-mechanism member 562 from the inside of the hole 563B toward the pin hole 122X. Therefore, even if the user's hand or bag pushes the pin 563, the pin 563 is pushed by the in-mechanism member 562, and therefore does not retract into the upper pipe 121, that is, does not come out of the pin hole 122X. This prevents the pin 563 from accidentally coming out of the pin hole 122X and the upper pipe 121 from sliding in the lower pipe 122. That is, when the user does not intend, the height of the handle 105 does not change.

  The second spring 565 biases the pin 563 toward the pin hole 122X of the lower pipe 122.

  Next, the slide restriction mechanism 560 in the slidable state will be described. FIG. 60 is a first side view of the slide limiting mechanism 560 in the slidable state according to the present embodiment. FIG. 61 is a second side view of the slide restricting mechanism 560 in the slidable state according to the present embodiment. 62 is a cross-sectional view taken along line AA in FIG. 60 of the slide limiting mechanism 560 in the slidable state according to the present embodiment. 63 is a cross-sectional view taken along the line BB in FIG. 61 of the slide limiting mechanism 560 in the slidable state according to the present embodiment.

60 to 62, contrary to the case of FIGS. 55 to 58, when the mechanism inner member 562 is pushed downward, the inner periphery of the hole 563 </ b> B of the pin 563 is the lower part of the mechanism inner member 562. Is not pushed from the outer peripheral surface 562B. The inclined surface 563C of the hole 563B of the pin 563 is pushed in the opposite direction of the pin hole 122X by the inclined surface 562D of the lower part of the in-mechanism member 562. As a result, the pin 563 moves in the direction opposite to the pin hole 122X. That is, the tip 563A of the pin 563 is removed from the pin hole 122X. As a result, the user can freely change the height of the handle.
[Sixth Embodiment]

Next, a sixth embodiment of the height adjustment mechanism of the handle 105 will be described. In the present embodiment, when the front / rear bar 151 and the upper / lower bar 152 are pulled upward, a tip 663A of a pin 663 described later is pulled out from the pin hole 122X. In addition, since the whole structure of the hand cart 100 is substantially the same as that of the first embodiment, description thereof will not be repeated here.
<Handle height adjustment mechanism>

  In the present embodiment, an operation button is provided on the lower surface of the handle grip 110, for example. Then, the upper part of the operation button 112 is attached to the front / rear bar 151. A front upper / lower bar 152F is connected to the front end of the front / rear bar 151 downward. A rear upper / lower bar 152R is connected to the rear end of the front / rear bar 151 downward. In the following description, the front upper / lower bar 152F and the rear upper / lower bar 152R are collectively referred to as the upper / lower bar 152 for the sake of explanation.

  A pressing member 153 is attached to the lower end of the upper and lower bar 152. The lower end of the pressing member 153 is attached to the upper end of a slide limiting mechanism 160 described later. That is, when the user pushes up the operation button 112, the front / rear bar 151 is moved upward, whereby the upper / lower bar 152 is moved upward, whereby the upper end portion of the slide limiting mechanism 160 is pulled upward.

  Regarding the slide limiting mechanism 660 according to the present embodiment, when not pulled from the upper and lower bars 152, the pin 163 penetrates the pin hole 122X of the lower pipe 122, that is, the pin 163 is a pin of the lower pipe 122. It protrudes from the hole 122X. In this state, even if a force is applied to the handle grip 110 in the vertical direction, the upper pipe 121 does not slide in the lower pipe 122, and the height of the handle 105 does not change.

Conversely, with respect to the slide limiting mechanism 660, when pulled from the upper and lower bars 152, the pin 163 moves to the inside of the upper pipe 121 and comes out of the pin hole 122X of the lower pipe 122. Thus, the user can adjust the height of the handle by applying a force to the handle grip 110 and sliding the upper pipe 121 within the lower pipe 122.
<Slide limiting mechanism 660>

  Next, the slide limiting mechanism 660 according to the present embodiment will be described. First, the slide restriction mechanism 660 in the non-slidable state will be described with reference to FIGS. FIG. 64 is a perspective view of the slide limiting mechanism 660 in the non-slidable state according to the present embodiment. FIG. 65 is a first side view of the slide limiting mechanism 660 in the non-slidable state according to the present embodiment. FIG. 66 is a second side view of the slide limiting mechanism 660 in the non-slidable state according to the present embodiment. FIG. 67 is a cross-sectional view taken along line AA in FIG. 65 of the slide limiting mechanism 660 in a non-slidable state according to the present embodiment. FIG. 68 is a cross-sectional view taken along the line BB in FIG. 66 of the slide limiting mechanism 660 in the non-slidable state according to the present embodiment. FIG. 69 is a perspective view of the in-mechanism member 162 according to the present embodiment. FIG. 70 is a plan view of the pin 663 according to the present embodiment.

  With reference to FIGS. 64 to 68, the slide limiting mechanism 660 includes a mechanism outer member 661, a mechanism inner member 662, a pin 663, a first spring 664, and a second spring 665.

  64 to 68, FIG. 12, and FIG. 13, the mechanism outer member 661 is similar to the mechanism outer member 161 of the first embodiment, and therefore, the description thereof will not be repeated here.

  64 to 68 and FIG. 14, the mechanism internal member 662 is slidable in the vertical direction with respect to the mechanism external member 661 in accordance with the movement of the vertical bar 152. The first spring 664 biases the in-mechanism member 662 downward. That is, the mechanism inner member 662 is pulled upward from the upper and lower bars 152 and moves upward relative to the mechanism outer member 661 against the biasing force of the first spring 664. On the contrary, when the user does not push up the operation button 112, the upper and lower bars 152 are not pulled from the front and rear bars 151, and thus move downward of the mechanism outer member 661 by the force of the first spring 664.

  The outer peripheral surface 662B on the pin hole 122X side (left side of the hand cart 100) on the lower side of the mechanism inner member 662 is formed so as to be recessed from the outer peripheral surface on the pin hole 122X side on the inner part of the mechanism inner member 662. In addition, slopes 662D that face slopes 663C of pins 663, which will be described later, are formed on the front and rear sides of the inner member 662 of the mechanism.

  64 to 68 and FIG. 70, the tip 663A of the pin 663 jumps out of the pin hole 122X of the lower pipe 122 or retracts from the pin hole 122X in accordance with the movement of the in-mechanism member 662. A through hole 663B is formed in the pin 663 in the vertical direction. On the opposite side of the through-hole 663B from the tip 663A (on the right side of the hand cart 100), slopes 663C are formed at the front and rear ends and downward. The lower part of the in-mechanism member 662 is slidably inserted in the through hole 663B in the vertical direction.

  As shown in FIGS. 64 to 68, the outer periphery of the mechanism inner member 662 is in contact with the inner periphery of the mechanism outer member 661, and the outer periphery of the mechanism outer member 661 is in contact with the inner periphery of the upper pipe 121. When the mechanism internal member 662 is not pulled upward by the upper and lower bars 152, the pin 663 is pushed toward the pin hole 122 </ b> X from the inside of the through hole 663 </ b> B by the middle portion of the mechanism internal member 662. Therefore, even if the user's hand or bag pushes the pin 663, the pin 663 is pushed by the in-mechanism member 662, and therefore does not retract into the upper pipe 121, that is, does not come out of the pin hole 122X. As a result, the pin 663 does not accidentally come out of the pin hole 122X, and the upper pipe 121 does not slide in the lower pipe 122. That is, when the user does not intend, the height of the handle 105 does not change.

  The second spring 665 biases the pin 663 toward the pin hole 122X of the lower pipe 122.

  Next, the slide restriction mechanism 660 in the slidable state will be described. FIG. 71 is a perspective view of the slide limiting mechanism 660 in the slidable state according to the present embodiment. FIG. 72 is a first side view of the slide limiting mechanism 660 in the slidable state according to the present embodiment. FIG. 73 is a second side view of the slide limiting mechanism 660 in the slidable state according to the present embodiment. 74 is a cross-sectional view taken along the line AA in FIG. 72 of the slide limiting mechanism 660 in the slidable state according to the present embodiment. FIG. 75 is a cross-sectional view taken along the line BB in FIG. 73 of the slide limiting mechanism 660 in the slidable state according to the present embodiment.

Referring to FIGS. 71 to 75, contrary to the case of FIGS. 64 to 68, when the inner member 662 is pulled upward, the inner periphery of the through-hole 663 </ b> B of the pin 663 is the inner member 662. It is not pushed from the outer peripheral surface 662B of the lower part of. The inclined surface 663C of the pin 663 is pushed in the direction opposite to the pin hole 122X by the inclined surface 662D at the lower part of the in-mechanism member 662. As a result, the pin 663 moves in the direction opposite to the pin hole 122X. That is, the tip 663A of the pin 663 is removed from the pin hole 122X. As a result, the user can freely change the height of the handle.
[Seventh Embodiment]

  The handle 105 according to the first to sixth embodiments has a two-stage configuration of an upper pipe 121 and a lower pipe 122. However, the handle 105 may have a three-stage configuration or more, such as an upper pipe, a middle pipe, and a lower pipe. The slide limiting mechanism according to the first to sixth embodiments can be applied to any slide mechanism in a combination of continuous pipes.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

100: hand cart 105: handle 110: handle grip 121: upper pipe 121F: front upper pipe 121R: rear upper pipe 122: lower pipe 122F: front lower pipe 122R: rear lower pipe 122X: first (second) height Adjustment hole 131: Loading platform 140: Wheel 162D: Slope 163: Front pin
163A: Tip 163C: Slope 263: Pin 263A: Tip 263C: Slope 362D: Slope 363: Pin 363A: Tip 462D: Slope 462E: Concave 463A: Tip 463C: Slope 562D: Slope 563A: Tip 563C: Tip 563C: Tip 563C Slope 662D: Slope 663: Pin 663A: Tip 663C: Slope

Claims (6)

A loading platform for placing the bag;
Wheels attached to the lower surface of the loading platform;
A cart comprising a handle attached to the upper surface of the cargo bed,
The handle is
A front lower pipe that is erected directly or indirectly on the front part of the upper surface of the cargo bed, and in which a plurality of first height adjustment holes are formed on the side surface;
A rear lower pipe that is directly or indirectly erected on the rear part of the upper surface of the cargo bed, and in which a plurality of second height adjustment holes are formed on the side surface;
A front upper pipe that moves up and down by sliding with respect to the front lower pipe;
A rear upper pipe that moves up and down by sliding with respect to the rear lower pipe;
A handle grip directly or indirectly connected to the upper part of the front upper pipe and the upper part of the rear upper pipe;
A front pin that moves up and down in conjunction with the front upper pipe and is inserted through the first height adjustment hole,
A rear pin that moves up and down in conjunction with the rear upper pipe and is inserted through the second height adjustment hole,
A pre-extrusion member for fixing the front pin in a state of passing through the first height adjustment hole;
A rear extrusion member for fixing the rear pin in a state of passing through the second height adjustment hole;
An operation unit connected directly or indirectly to the front extrusion member and the rear extrusion member,
When the operation portion is pushed, the front push member and the rear push member move in the first direction, so that the front pin and the rear pin are inside the front lower pipe and the rear lower pipe. Move and
When the operation portion is not pushed, the front push member and the rear push member move in the second direction, so that the front pin and the rear pin have the first height adjusting hole and the first push hole. A hand cart that is fixed in a state of passing through two height adjustment holes. The front push member includes a first push portion for fixing the front pin to the surface on the first height adjustment hole side in a state of passing through the first height adjustment hole, and the front pin. A first recess for retracting the first height adjustment hole from the first height adjustment hole,
The rear push member includes a second push portion for fixing the rear pin to the surface on the second height adjustment hole side in a state of passing through the second height adjustment hole, and the rear pin. The hand cart according to claim 1, further comprising a second recess for retracting the second height adjustment hole from the second height adjustment hole. The front pushing member has a third recess for bringing the front pin through the first height adjusting hole on a surface opposite to the surface on the first height adjusting hole side; A third push-out portion for moving the front pin in a direction in which the front pin is retracted from the first height adjustment hole;
The rear pushing member has a fourth recess for bringing the rear pin through the second height adjusting hole on a surface opposite to the surface on the second height adjusting hole side; The push cart according to claim 1 or 2, further comprising a fourth pushing portion for moving the rear pin in a direction in which the rear pin is retracted from the second height adjustment hole. The third extruding part is a slope formed on a surface on the opposite side of the surface on the first height adjusting hole side in the pre-extruding member,
4. The hand cart according to claim 3, wherein the fourth pushing portion is a slope formed on a surface of the rear pushing member opposite to the surface on the second height adjusting hole side. The front pushing member is slidable inside the front pin, and an inclined surface is formed on the inner peripheral surface of the front pin opposite to the tip of the front pin.
The said back pushing member is slidable inside the said back pin, and the inclined surface is formed in the internal peripheral surface of the said back pin on the opposite side to the front-end | tip of the said back pin. Barrow cart.   The hand cart according to any one of claims 1 to 5, wherein tips of the front pins and the rear pins are tapered.

Images