JPH0741076U - Braking device for flexible casters in a hand truck - Google Patents

Abstract

(57) [Summary] [Purpose] The wheels are braked regardless of the directional position of the universal casters. A caster having a wheel support frame 7 having a groove-shaped cross section which freely rotates about a main shaft 5 in a longitudinal axis, and a wheel 11 mounted on a side plate 9 of the wheel support frame 7 so as to be able to roll laterally. 3 is attached to the bed 1 on which the handle rod 2 is erected. Between the upper plate 8 of the wheel support frame 7 of the universal caster 3 and the wheel 11, a brake shoe 12 that is biased by a coil spring 15 in the direction of separating from the wheel 11 is provided on the side plate 9 so as to rotate around the lateral axis. Assemble freely. An upper end of an operation wire 17 whose lower end is connected to the brake shoe 12 is led out above the luggage carrier 1 through a through hole 16 provided on the axis of the main shaft 5 and is rotatably attached to the handle bar 20. Connect to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the handle rod is provided with a swivel caster including a wheel support frame having a groove cross-section which rotates about a main shaft in a longitudinal axis and a wheel mounted on a side plate of the wheel support frame so as to be able to roll laterally. The present invention relates to a braking device for a universal caster in a hand truck mounted on an established loading platform.

[0002]

[Prior art]

 There is a structure in which a pedal is provided on a side plate of a wheel support frame having a groove-shaped cross section, and when the pedal is depressed, the pedal is brought into contact with and separated from a brake shoe wheel interlocked with the pedal.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional example, since the pedal for operation is provided on the side plate of the wheel support frame which rotates about the axle in the longitudinal axis, the pedal turns along with the wheel support frame, so that the braking of the wheel is performed. When the operation is performed, the position is not always present at a position suitable for the stepping operation, and the position must be corrected in advance to perform the operation, and the operation is sometimes complicated.

The present invention has been made by paying attention to such a conventional example.

[0005]

[Means for Solving the Problems]

 The handle rod is installed upright on a universal caster consisting of a wheel support frame with a grooved section that freely rotates about the main shaft in the longitudinal axis and a wheel that is mounted on the side plate of the wheel support frame so that it can roll on the horizontal axis. In a hand truck mounted on a loaded platform, a brake shoe, which is biased by a coil spring in a direction of being pressed against or separated from the wheel by a coil spring, is provided between the upper plate of the wheel support frame of the universal caster and the wheel. The upper end of the operating wire, whose lower end is connected to the brake shoe, is attached to the side plate so that it can rotate freely, and the upper end of the operating wire is led out through the through hole provided on the axis of the main shaft to the upper side of the loading platform and turned to the handle bar. The configuration is such that it is connected to an operation handle that is freely attached.

[0006]

【Example】

 The drawings show an embodiment of a braking device for a universal caster in a hand truck according to the present invention. FIG. 1 is a front view of a main portion and FIG. 2 is a front view.

In the figure, 1 is a loading platform on which a handle rod 2 is erected, 3 is a swivel caster mounted on the loading platform 1, 4 is a base of the swivel caster 3, and a bearing 6 is supported by a spindle 5 on the substrate 4 fixed to the loading platform 1. , And a wheel support frame 7 that freely swivels with the main shaft 5 as the vertical axis via the bearing 6 is assembled to the main shaft 5.

The support frame 7 is composed of a cross-sectional groove shape body composed of an upper plate 8 and a pair of side plates 9 and 9 arranged on the left and right of the upper plate 8. A wheel 11 is attached to the main shaft 5, and a wheel 11 is rotatably and pivotally attached by an axle 10 installed on side plates 9 and 9.

Further, 12 is a brake shoe interposed between the wheel 11 and the upper plate 8, and the brake shoe 12 is rotated by attaching an intermediate portion to a support shaft 13 installed between the side plates 9 and 9. The brake shoe 12 is freely attached to the side plate 9, that is, the wheel support frame 7. One end of the brake shoe 12 is provided with a braking piece 14 for contacting and separating the wheel 11, and the other end is provided with the braking piece 14. One end of the coil spring 15 for urging in the separating direction is locked, and the other end of the coil spring 15 is locked to the side plate 9 of the wheel support frame 7.

The brake shoe 12 is arranged so as to be separated from the wheel 11 by the bias of the coil spring 15, and is pressed against the wheel 11 against the bias of the coil spring 15 to regulate the rolling of the wheel 11. To do.

Reference numeral 16 in the drawing denotes a through hole formed in the main shaft 5 on the axis of the main shaft 5, that is, the axis of the turning vertical axis of the wheel support frame 7, and the operation wire 17 penetrating the through hole 16. The lower end of the operation wire 17 is penetrated through the through hole 18 of the brake shoe 12, and the lower end protruding from the through hole 18 is provided with a locking body 19 to be connected to the brake shoe 12 and the through hole 16 is penetrated. Is led out above the loading platform 1 through the loading platform 1 and is connected to an operation handle 20 rotatably mounted on the handle bar 2.

The operation handle 20 is rotatably pivoted at a lower end portion by a support shaft 22 to a support piece 21 protruding from the handle rod 2, and an upper end of a link 24 is provided at a middle portion of the operation handle 20 by a pin 23. The parts are rotatably assembled with each other, and the upper end of the operation wire 17 is connected to the lower end of the link 24 located below the handle 20.

Reference numeral 25 in the drawing denotes an outer tube.

Therefore, when the operation handle 20 is in the position shown by the chain line in FIG. 1, the coil spring 15 is contracted, the braking portion 14 of the brake shoe 12 is separated from the wheel 11, and the braking restriction of the brake shoe 12 is suppressed. Wheels 11 that are not rolled freely roll.

In this state, when the operation handle 20 is rotated about the support shaft 22 to the position shown by the solid line in FIG. 1, the link 24 attached by the pin 23 to the intermediate portion of the operation handle 20 causes the operation handle 20 to move. As a result, the operation wire 17 having the upper end attached to the link 24 is pulled upward, and the brake shoe 12 connecting the lower end of the wire 17 resists the bias of the coil spring 15. When the brake shoe 12 rotates, the braking portion 14 of the brake shoe 12 comes into pressure contact with the wheel 11 to regulate the rolling of the wheel 11.

When the wheel 11 is in the rolling restriction state, each member is so arranged that the support shaft 23 is located outside the virtual straight line connecting the upper end of the wire and the pin 23 (in the separating direction from the handle bar 2). As a result, rotation of the operating handle 20 (return of the brake shoe 12 to the original position) due to the bias of the coil spring 15 is restricted.

Further, in the embodiment, the brake shoe 12 is biased by the coil spring 15 from the wheel 11 in the separating direction, but it may be biased in the pressing direction.

[0018]

[Effect of device]

 Since the present invention is configured as described above, wheel braking can be freely performed regardless of the direction of the universal caster.

[Brief description of drawings]

FIG. 1 is a front view of a main part.

FIG. 2 is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Loading platform 2 Handle rod 3 Flexible caster 5 Spindle 7 Wheel support frame 8 Upper plate 9 Side plate 11 Wheels 12 Brake shoes 15 Coil spring 16 Through hole 17 Operation wire 20 Operation handle

Claims (1)

[Scope of utility model registration request] 1. A handle for a swivel caster comprising a wheel support frame having a grooved cross section which freely rotates about a main shaft in a longitudinal axis and a wheel mounted on a side plate of the wheel support frame so as to be able to roll on a horizontal shaft. In a hand truck with a rod installed upright, a brake shoe that is biased by a coil spring between the upper plate of the wheel support frame of the universal caster and the wheel so that the shoe is pressed against or separated from the wheel. Is rotatably attached to the side plate, and the upper end of the operation wire whose lower end is connected to the brake shoe is led out to the upper side of the loading platform through a through hole provided on the axis of the main shaft, and is turned to the handle bar. A braking device for a flexible caster in a hand truck that is connected to a freely assembled operation handle.