JP2007313939A - Handcart for transportation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handcart for transportation with good workability capable of clamping a cylinder by a pair of holders even if an operation handle is not operated in order to turn the pair of holders at loading of the cylinder. <P>SOLUTION: The handcart for transportation 1 is provided with a body 2 provided with a scooping plate 3 insertable to a curved part of the cylinder at a lower side; and the pair of holders 18 turnable relative to the body 2. The pair of holders 18 is urged in the opened state by an extension coil spring 20 and when the pair of holders 18 is turned in resistant to the extension coil spring 20 by abutment with the cylinder and becomes in the closed state for clamping the cylinder, a stopper 24 maintains the closed state of the pair of holders 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hand truck for transporting a cylinder such as a welding acetylene gas cylinder or a propane gas cylinder.

  Conventionally, as a hand cart that transports a cylinder in a factory or the like, a main body provided with a handle on the upper side and a scooping plate that can be inserted into a curved portion formed around the bottom of the cylinder, and a rear side of the main body. There is known a wheel including a wheel fixed to a provided bracket and wound around a cylinder with a chain and fixed to a main body (see Patent Document 1).

There is also known a hand cart that includes a pair of left and right holders that can rotate with respect to the main body and an operation handle that rotates the holder in order to fix the cylinder to the main body (see Patent Document 2).
Japanese Utility Model Publication No. 55-32294 JP-A-11-91574

  In the above-mentioned conventional hand cart, when the cylinder is loaded, the cylinder is fixed to the main body, and it is necessary to wind the chain or to operate the operation handle for rotating the holder. Have.

  Therefore, an object of the present invention is to provide a hand cart that is excellent in workability when loading a cylinder.

  In order to achieve the above object, the present invention provides a manual pusher having a main body 2 provided below with a scooping plate 3 that can be inserted into a curved portion of a cylinder, and a pair of holders 18 that can rotate with respect to the main body 2. In the transport vehicle 1, an elastic member 20 that urges the pair of holders 18 in an open state, and the pair of holders 18 rotates against the urging force of the elastic member 20 by abutting against the cylinders, and the cylinders. There is provided a hand cart 1 having a stopper 24 that maintains the closed state when the closed state is held.

  The hand cart of the present invention can hold the cylinder by a pair of holders only by bringing the hand cart closer to an upright cylinder. Therefore, it is not necessary to operate the operation handle to rotate the pair of holders when loading the cylinder, and the workability when loading the cylinder is excellent.

 A hand cart according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, the handcart 1 includes a metal pipe body 2 including two column portions 2 a and an upper connection portion 2 b that connects the two column portions 2 a upward. Yes. The upper part of the two pillar parts 2a is bent, and the bent part of the two pillar parts 2a and the upper connecting part 2b are used as a handle. The rear ends of the L-shaped scooping plate 3 are welded to the inner sides of the lower ends of the two column portions 2a and extend forward from the two column portions 2a. A lower support frame 4 having a semicircular portion 4a with which the side surface of the cylinder placed on the scooping plate 3 abuts is welded to the lower end inside of the two column portions 2a above the welding position of the scooping plate 3. Yes. Further, an L-shaped reinforcing frame 6 having an auxiliary front wheel 5 attached to the tip is welded to the outside of the two pillars 2 a and the tip of the scooping plate 3 to reinforce the scooping plate 3.

  A bracket 7 is welded to the rear of the lower end of each of the two column portions 2a. An axle pipe 8 shown in FIG. 3 is welded to the two brackets 7, and wheels 10 are attached to both ends of an axle 9 that is rotatably accommodated in the axle pipe 8.

  As shown in FIG. 3, one end of two auxiliary rear wheel support pipes 11 is welded to the axle pipe 8 with a gap therebetween. The other ends of the two auxiliary rear wheel support pipes 11 are abutted on the upper surface of the auxiliary rear wheel mounting plate 12 and are welded to the auxiliary rear wheel mounting plate 12. An auxiliary rear wheel 13 is attached to the lower surface of the auxiliary rear wheel mounting plate 12.

  As shown in FIG. 5, an intermediate connection pipe 14 is welded at a position below the bent portion of the two column portions 2a to connect the two column portions 2a. A stopper mounting plate 15 to be described later is welded to the lower side of the intermediate position of the intermediate connecting pipe 14, and the lower surface of the stopper mounting plate 15 and the upper surface of the auxiliary rear wheel mounting plate 12 are welded as shown in FIGS. The main body support pipe 16 is welded.

  As shown in FIG. 5, an upper support frame 17 is welded to the two column portions 2a. The upper support frame 17 is provided in front of the extension part 17a extending from each of the two pillar parts 2a (upward in FIG. 5) and the extension part 17a. The holder installation portion 17b and the left and right holder installation portions 17b are connected to each other, and a semicircular portion 17c that contacts the side surface of the cylinder is provided.

  A pair of holders 18 each having a semicircular portion 18a for sandwiching a cylinder are rotatably attached to the left and right holder setting portions 17b of the upper support frame 17. Specifically, a cylindrical portion 18b is provided at a substantially central position on the outer periphery of the semicircular portion 18a of the holder 18, and the cylindrical portion 18b can be rotated to the holder installation portion 17b by a shaft (not shown). It is attached. In addition, the holder 18 includes an engagement portion 18c that engages with an engagement protrusion 24b of a stopper 24 described later when the holder 18 is in a closed state in which the cylinder 18 is sandwiched between the ends of the semicircular portion 18a. A small cylindrical portion 18d is provided on the outer periphery of the semicircular portion 18a at a substantially intermediate position between the tip of the semicircular portion 18a and the cylindrical portion 18b. A metal fitting 19 is provided on the small cylindrical portion 18 d, and a front hook 20 a of a tension coil spring 20 is hung on the metal fitting 19.

  A pin 22 having a metal fitting 21 on which a rear hook 20b of the tension coil spring 20 is hung is welded to the outer side surfaces of the two column portions 2a. The pair of holders 18 are urged to the open state shown in FIG. The tension coil spring 20 corresponds to an elastic member that biases the pair of holders 18 in the open state.

  As shown in FIGS. 1 and 2, the stopper mounting plate 15 has a wall portion 15a extending upward. A shaft 23 having a male screw at its tip is inserted into a hole (not shown) formed below the wall portion 15a, and the male screw is screwed into a stopper 24 and fixed. As shown in FIG. 5, a compression spring 25 is disposed around the shaft 23 between the stopper 24 and the wall portion 15a, and urges the stopper 24 to the position shown in FIG. The shaft 23 has a head portion 23a. The head portion 23a abuts against the rear surface of the wall portion 15a when the stopper 24 is urged forward (upward in FIG. 5) by the compression spring 25.

  As shown in FIGS. 1 and 2, a grip shaft 26 having a male screw at its tip is inserted into a hole (not shown) formed above the wall portion 15a, and the male screw is screwed into the stopper 24 and fixed. ing. As shown in FIG. 5, a grip 27 is fixed to the end of the grip shaft 26, and when the operator grasps the grip 27 and pulls it backward (downward in FIG. 5), the biasing force of the compression spring 25 The stopper 24 can be moved backward against this.

  The stopper 24 includes a base portion 24a and an engaging projection 24b that protrudes from the base portion 24a. The engagement protrusion 24b engages with the engagement portion 18c of the holder 18 when the holder 18 is in a closed state that sandwiches the cylinder.

  Next, the operation of the hand cart 1 according to this embodiment will be described. When loading the cylinder, first, the hand cart 1 in the state of FIG. 1 is moved to the vicinity of the cylinder using the wheel 10 and the auxiliary rear wheel 13. Next, using the handle, the hand cart 1 is brought into a state where the scooping plate 3 is parallel to the ground as shown in FIG. 2, and is brought closer to an upright cylinder using the auxiliary front wheels 5 and the wheels 10. As shown in FIG. 6, while the cylinder is not in contact with the engaging portion 18 c of the holder 18, the pair of holders 18 is kept open.

  As shown in FIG. 7, when the cylinder comes into contact with the engaging portion 18 c of the holder 18, the holder 18 rotates against the biasing force of the tension coil spring 20 that biases the holder 18 in the open state.

  In a state where the scooping plate 3 is inserted into a curved portion formed around the bottom of the cylinder and the side surface of the cylinder abuts on the semicircular portion 4a of the lower support frame 4, the side surface of the cylinder is upward as shown in FIG. It will be in the state contact | abutted also to the semicircle-shaped part 17c and the stopper 24 of the support frame 17. FIG. At this time, the stopper 24 is moved backward (downward in FIG. 8) against the urging force of the compression spring 25. The pair of holders 18 that are turned by the contact with the cylinders and are in the closed state that sandwich the cylinders try to return to the open state by the urging force of the tension coil spring 20, but the engaging portions 18 c of the pair of holders 18. Is engaged with the engagement protrusion 24b of the stopper 24 to prevent the return to the open state, and the closed state of the pair of holders 18 is maintained.

  After the cylinder is sandwiched between the pair of holders 18 in this way, the operator uses the handle to move the hand cart 1 from the state shown in FIG. 9 to the state shown in FIG. The cylinder is transported using 10 and the auxiliary rear wheel 13.

  When loading and unloading the cylinder, the operator uses the handle to bring the hand cart 1 again into the state shown in FIG. 9 and moves the stopper 24 by pulling the grip 27 backward (to the left in FIG. 9). The engagement between the engagement portion 18c of the holder 18 and the engagement protrusion 24b of the stopper 24 is released. In this state, when the handcart 1 is moved backward using the auxiliary front wheel 5 and the wheel 10, the scooping plate 3 is pulled out from the curved portion of the cylinder, and the pair of holders 18 are opened by the biasing force of the tension coil spring 20. Return to the state. Thus, the cylinder is unloaded from the hand cart 1 in an upright state.

  The handcart according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the elastic member that biases the pair of holders 18 to the open state is the tension coil spring 20 attached to the column part 2a and the holder 18, but is not limited thereto. By arranging a torsion spring or the like at the rotation center of the holder 18, the pair of holders 18 may be biased to the open state.

The side view of the handcart according to the embodiment of the present invention. The side view which shows the state before loading of the cylinder of the handcart according to embodiment of this invention, or after unloading. The front view of FIG. The principal part enlarged view of FIG. AA sectional drawing of FIG. The AA sectional view of Drawing 2 showing the state before a cylinder contacts a holder at the time of loading of a cylinder with a hand cart of an embodiment of the invention. The AA sectional view of Drawing 2 showing the state where the cylinder contacted the holder at the time of loading of the cylinder with the hand cart of an embodiment of the invention. The AA sectional view of Drawing 2 showing the state where the cylinder was pinched by the holder at the time of loading of the cylinder with the hand cart of an embodiment of the invention. The side view at the time of loading and unloading of the cylinder in the hand cart according to the embodiment of the present invention. The side view at the time of conveyance of the cylinder in the handcart of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Handcart 2 Main body 3 Scooping board 18 Holder 20 Tensile coil spring (elastic member)
24 Stopper 27 Grip

Claims (1)

In a hand cart having a main body provided below with a scooping plate that can be inserted into a curved portion of a cylinder, and a pair of holders that can rotate with respect to the main body, elasticity that biases the pair of holders to an open state And a stopper that maintains the closed state when the pair of holders are rotated against the urging force of the elastic member by the contact with the cylinder and the cylinder is held closed. A featured handcart.

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