JP2006111118A - Brake device for hand-pushed cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake device with a simple structure capable of certainly braking of a wheel. <P>SOLUTION: A first pedal and an arm piece are projectedly provided on a circumference side of a turning rod 5 supported on a lower surface rear part provided on a fixed wheel 20 of a load-carrying platform, a brake shoe 8 is provided on a projection end side of the arm piece 6 and a connection pin 12 is projectedly provided on the first pedal 7 along the turning rod 5. A pair of upper and lower curved engagement edges 9a, 9b in which a circumferential side of the connection pin 12 is engaged/disengaged so as to be fitted to contacting/leaving of the brake shoe 8 to the fixed wheel 20 is provided on a second pedal 13 turnably installed on the load-carrying platform adjacent to the first pedal 7 on a track circle making the turning rod of the connection pin as a center. Then, springs 10, 17 for turning/urging a pedal distal end side from the lower engagement edge 9b in the upper engagement edge 9a direction are interposed between the first and second pedals 7, 13 and the load-carrying platform 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a brake device for a hand cart (cart) used for easily moving an article in a factory or a store.

  In general, the brake device of a conventional hand cart is generally provided with a brake shoe on a fixed wheel arranged on the rear side of the loading platform and a handle (generally falling down) on the rear side of the loading platform. The structure is such that the operated lever and the pedal body (generally made up of bar rods) arranged on the loading platform side are selectively operated to make contact and separation.

  Since the conventional example adopts a configuration in which the brake (braking) operation is performed by selecting either the hand side or the foot side, the structure of the brake device as a whole is complicated, and the device unit for the loading platform (hand truck) There is a tendency for the assembly to be complicated.

  The present invention has been devised to provide a brake device with a simplified structure, paying attention to the drawbacks of such a conventional example.

  In a brake device for a handcart that has a brake shoe that contacts and separates from a fixed wheel provided on the rear bottom of the loading platform, the first pedal and arm pieces protrude from the periphery of the rotating rod supported on the rear bottom of the loading platform. The brake shoe is provided on the projecting end side of the arm piece, and a connecting pin is provided on the first pedal along the rotating rod so that the peripheral side of the connecting pin is connected to and separated from the fixed wheel of the brake shoe. A pair of upper and lower curved engagement edges that are engaged and disengaged according to the second pedal, which is adjacent to the first pedal and is rotatable on the loading platform, is centered on the rotating rod of the connecting pin. Provided on the locus circle, and between the first and second pedals and the loading platform, a spring is interposed between the first and second pedals, and the spring is biased to rotate from the lower engagement edge toward the upper engagement edge. It is a configuration.

  According to the present invention, by selectively pressing the first pedal and the second pedal, the restricted state and the released state of the wheel can be easily obtained, and the structure is simple, so that an inexpensive brake device can be provided. .

  The drawings show one embodiment of a brake device for a hand cart according to the present invention, FIG. 1 is a bottom view, FIG. 2 is a sectional view, and FIG. 3 is a sectional view during braking.

  A hand cart A to which the present invention is applied has a pair of left and right universal wheels on the front side of the loading platform 1 and a pair of left and right fixed wheels 20 on the rear side, and receives and supports the loading platform 1. And a brake device B associated with the fixed wheel 20 on the rear lower surface side of the cargo bed 1.

  In the figure, reference numeral 3 denotes a device board of the brake device B. The device board 3 is superposed on the lower surface of the loading platform 1, and a mounting bolt 19 is secured to the loading platform 1 with a support frame 2 </ b> A pivotally supported by the handle 2. The support pieces 4 and 4 are hung so as to face each other on both the left and right (longitudinal direction) sides of the apparatus substrate 3. 4 and 4 are provided with a round rod-like rotating rod 5 that is supported rotatably.

  The rotating rod 5 has a pair of arm pieces 6 and 6 (one arm piece 6) projecting so as to correspond to the fixed wheel 20 (one wheel is not shown) on the peripheral sides of both ends. Is provided with a first pedal 7 projecting in the same manner as the arm piece 6 on one arm piece 6 side between the arm pieces 6, 6. The brake shoe 8 provided on the projecting end side of the arm piece 6 is in contact with the wheel 20a of the fixed wheel 20 to restrict its rolling.

  The first pedal 7 is rotated by passing the base portion of the side plate constituting piece 7b of the frame body in which the side plate constituting pieces 7b and 7b are relatively provided on both sides of the upper plate constituting piece 7a (which becomes a stepping plate) through the base portion. It is welded to the flange 5 and protruded from the peripheral side of the rotating rod 5 as described above. Then, through the side plate constituting pieces 7b, 7b, a round bar rod is welded, and the locking pin 11 is connected to the opposite side surface 7 'and the connecting pin 12 is connected to the other side surface 7'. The other end of the coil spring 10, which has one end locked to the device substrate 3 (loading platform 1), is locked to the locking pin 11, and the connecting pin 12 is connected to the first pedal 7. It is connected to the second pedal 13 arranged adjacently.

  That is, the first pedal 7 and the loading platform 1 (device base frame 3) are arranged in a direction in which the upper surface (of the upper plate component piece 7a) maintains a substantially horizontal state where the first pedal 7 faces the lower surface of the loading platform 1. Energized by the coil spring 10 stretched between them, and in the horizontal state, provided at the projecting end of the arm piece 6 projecting from a pivot rod 5 that pivots integrally with the first pedal 7. The brake shoe 8 is disengaged from the step (circumferential) surface position of the wheel 20a, and the wheel 20a rolls freely.

  The second pedal 13 has side plates 13b and 13b 'provided on both sides of an upper plate 13a serving as a stepping plate, and is operated by welding a base end (upper end) portion to one side plate 13b on the first pedal 7 side. A plate 14 is hung, and is opposed to one of the support pieces 4 in the vicinity of the support piece 4, and is hung on the apparatus substrate 3 on the rear side of the loading platform 1 with respect to the rotary rod 5. The support piece 4 and the second support piece 16 support the end of the support shaft 15 interposed between the two support pieces 16 and penetrated through the side plates 13b and 13b '(and the working plate 14 welded to the side plate 13b). And arranged adjacent to the first pedal 7.

  The second pedal 13 has one end of a second spring 17 wound around the support shaft 15 that rotatably supports the pedal 13 as the pedal 13 (the upper plate 13a) and the other end as the loading platform. 1 (apparatus substrate 3), and the upper surface (upper plate 13a) of the first pedal 7 is opposed to the lower surface of the loading platform 1 by the urging of the spring 17 so as to maintain a substantially horizontal state. .

  The operation plate 14 constituting the second pedal 13 includes a window 18 engaged with the connecting pin 12 provided on the first pedal 7, and the front edge of the window 18 is centered on the rotating rod 5. A pair of upper and lower curved engagement edges 9a and 9b are arranged adjacent to each other so as to be positioned on the moving path (rotation locus) of the connecting pin 12 along the circle. The upper and lower engaging edges 9a and 9b are moved in and out beyond the boundary wall 9c between the edges 9a and 9b.

  The brake shoe 8 provided at the protruding end (tip) portion of the arm piece 6 is constituted by a bolt body, and the position is adjusted by changing the screwing position of the bolt body (brake shoe 8) with the arm piece 6. (After being changed, the nut member 8a is tightened to be placed at the adjustment position), and the brake (braking) function is not lowered following the wear of the wheel 20a.

  Thus, when the front end side of the first pedal 7 arranged so as to protrude from the rear end of the loading platform 1 is depressed, the arm piece 6 provided in the rotating rod 5 integrated with the first pedal 7 is provided. The brake shoe 8 at the front end is in contact with the wheel 20a of the fixed wheel 20 (one wheel is not shown) and restricts its rolling, and this restricted state projects from the first pedal 7. The continuous connecting pin 12 is maintained by being engaged with the lower engagement edge 9b on the second pedal 13 side whose rotation is restricted by the bias of the second spring 17 (FIG. 3).

  In this braking state, when the front end (free end) side of the second pedal 13 protruding from the rear end of the loading platform 1 is depressed in the same manner as the first pedal 7, the front end of the second pedal 13 is centered on the support shaft 15 and The second connecting member 17 is pivoted and lowered against the urging force of the second spring 17, and the connecting pin 12 is moved away from the lower engaging edge 9b, that is, relative to the upper engaging edge 9a along the boundary wall 9c. When the boundary wall 9c is moved, the coil spring 10 momentarily moves to the upper engagement edge 9a side when the coil spring 10 is biased. The shoe 8 is detached from the contact position with the wheel 20a, and the wheel 20a is allowed to roll freely. In this state, the connecting pin 12 is locked to the upper engagement edge 9a, and this state is referred to as the coil spring 10. Is maintained by holding (FIG. 2) and the first pedal By rotating the rotation bar 5 presses the front end side, it is possible to obtain the brake the brake shoe 8 is in contact with the wheel 20a again.

Bottom view. Sectional drawing. Sectional drawing at the time of braking.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 5 Rotating rod 6 Arm piece 7 First pedal 8 Brake shoe 9a Upper engagement edge 9b Lower engagement edge 10 Spring 12 Connecting pin 13 Second pedal 17 Spring 20 Fixed wheel

Claims (1)

In a brake device for a handcart that has a brake shoe that contacts and separates from a fixed wheel provided on the rear bottom of the loading platform, the first pedal and arm pieces protrude from the periphery of the rotating rod supported on the rear bottom of the loading platform. The brake shoe is provided on the projecting end side of the arm piece, and a connecting pin is provided on the first pedal along the rotating rod so that the peripheral side of the connecting pin is connected to and separated from the fixed wheel of the brake shoe. A pair of upper and lower curved engagement edges that are engaged and disengaged according to the second pedal, which is adjacent to the first pedal and is rotatable on the loading platform, is centered on the rotating rod of the connecting pin. Provided on the locus circle, and between the first and second pedals and the loading platform, a spring is interposed between the first and second pedals, and the spring is biased to rotate from the lower engagement edge toward the upper engagement edge. , Brake equipment for handcarts.

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