JP2007083966A - Locking mechanism for hand-pushed dolly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking mechanism of a wheel used for a hand-pushed dolly in which rotation of the wheel is automatically locked at stopping of the vehicle and the lock state is easily released at traveling. <P>SOLUTION: The hand-pushed dolly is constituted as follows. The locking mechanism of the wheel used for the hand-pushed dolly is provided with a handle mounted to an upper part of a frame constituting a vehicle body; and the wheel mounted to a lower part of the frame. The locking state is maintained by fitting a pin urged by an elastic body to a recession part of a locking board connected to the wheel or integrally provided on the wheel. A wire is pulled and the pin is removed from the recession part accompanying with turning of the handle, thereby, the locking state of the wheel is released. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

    The present invention relates to a wheel locking mechanism used in a hand cart, and more particularly to a wheel locking mechanism that is in a locked state, that is, in a braking state when the vehicle is stopped, and that can be driven by being released by a human action during transportation.

  An example of a hand cart which is in a braking state when the vehicle is stopped and which can travel by releasing a locked state by a human action during transport is disclosed in Japanese Patent Laid-Open No. 10-181610.

Here, the hand cart described in this publication is provided with a brake release rod in the vicinity of the pusher and releases the braking state by simultaneously grasping the pusher and the brake release rod during traveling.
Japanese Patent Laid-Open No. 10-181610

  In a hand cart used to carry a load, it is desirable that the rotation of the wheel is automatically locked when the vehicle is stopped such as when the load is reloaded. This is to prevent the transporter from traveling in other directions.

  Further, it is desired that the locked state of the wheel is easily released for the convenience of traveling.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a wheel locking mechanism used in a handcart that is automatically locked when the vehicle is stopped and is easily released when the vehicle is traveling.

  In order to solve the above-described problems, the handcart according to the present invention is configured as follows.

  A wheel locking mechanism used in a handcart having a handle attached to an upper part of a frame constituting a vehicle body and a wheel attached to a lower part of the frame, which is connected to or integrated with the wheel. The locked state is maintained by fitting a pin urged by an elastic body into the recessed portion of the lock plate, and the lock state of the wheel is released by pulling the wire from the recessed portion as the handle rotates and the pin is removed from the recessed portion. Like that.

  In the present invention, the locked state is maintained by fitting the pin urged by the elastic body as described above, and the locked state is released along with the rotation of the handle. When the user is away from the transport vehicle, the wheel rotation is automatically locked.

  On the other hand, when the user holds and rotates the handle, the locked state is released. That is, the locked state is easily released during traveling.

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

  1 is a schematic explanatory view of the present invention, FIG. 2 is a reference perspective view showing a use state, FIG. 3 is a front view showing the vicinity of a wheel in a locked state, and FIG. 4 is a plan view thereof. 5 is a front view showing the vicinity of a wheel that has been unlocked, FIG. 6 is a plan view thereof, FIG. 7 is a perspective view showing a wheel portion provided with a lock member, and FIG. 8 is a relationship between the bracket and the wheel. FIG. 9 is an explanatory view showing another embodiment of the handle part.

  The push cart lock mechanism according to the present invention is used in a push cart having a handle 20 at the top of the frame 10 and wheels 11, 12, 13 at the bottom as shown in FIG. As shown in FIG. 1, the outline of the present invention is that the wire 21 is pulled by the rotation of the handle 20, and the sliding body 23 is slid along with this, and is fitted in the recess 24 a provided in the lock plate 24. The pin 23a is disengaged from the recess 24a, the locked state is released (see FIGS. 3 and 5), and the wheel 13 can be rotated. On the other hand, when the user releases the handle 20, the sliding body 23 is pushed back by the pressing spring 25, which is an elastic body, and the pin 23a is fitted into the recess 24a so that the wheel 13 is braked or locked.

  3 and 4 show the vicinity of the wheel in the locked state. The wheel 13 is attached to the bracket 26 so as to be rotatable about the rotation shaft 13a. The bracket 26 is fixed to the mounting plate 27, and the mounting plate 27 is fixed to the frame 10.

  A lock plate 24 is fixed to the wheel 13, or the wheel 13 and the lock plate 24 are integrally provided. Therefore, the lock plate 24 rotates together with the wheel 13, and the rotation of the lock plate 24 is restricted. When this is done, the wheels 13 are braked. The lock plate 24 is a disk-shaped plate body, and a plurality of recesses 24a are provided on the outer peripheral edge. A sliding body 23 is slidably attached to the bracket 26. The sliding body 23 is a plate-like body bent approximately 90 degrees in the middle as shown in FIGS. The sliding body 23 is provided with a hole 23b, and the screw 28 is loosely inserted into both the holes 23b and 26a in a state where the hole 26a and the hole 23b provided in the bracket 26 shown in FIG. ing. Thus, the sliding body 23 is slidably attached to the bracket 26.

  The sliding body 23 is provided with a pin 23a which is a cylindrical protrusion. The pin 23a has a diameter that can be fitted into the recess 24a. The pin 23a has a length that allows the hole 26a provided in the bracket 26 to be loosely inserted and fit into the recess 24a.

  The handle 20 is a cylindrical rod, and is provided on the upper portion of the frame 10 as shown in FIG. The handle 20 is provided so as to be rotatable about the rotation shaft 29 in the direction indicated by the arrow in FIG.

  The handle 20 and the sliding body 23 are connected via a wire 21. The end portion of the wire 21 on the handle 20 side is bifurcated, and is fixed to the handle 20 by a fastener 20a substantially on a diagonal line. On the other hand, the end of the wire 21 on the sliding body 23 side is fixed to the sliding body 23 with a screw 30. Therefore, even if the handle 20 is rotated clockwise or counterclockwise in FIG. 1, the sliding body 23 slides leftward in FIG. Note that the method of fixing the handle 20 and the wire 21 is not limited to the method in which the wire 21 is bifurcated at the end. For example, the handle 20 and the wire 21 may be fixed at one place as shown in FIG. .

  The wire 21 is loosely inserted into a resin protective tube 22 except for the vicinity of both ends. The wire 21 and the protective tube 22 are loosely inserted into the frame 10 from an insertion hole 10a provided in the lower part of the frame 10 and are installed in the frame 10 which is a hollow pipe body except for the vicinity of the wheels 13.

  A pressing spring 25 is interposed between the mounting plate 27 to which the bracket 26 is attached and the bent portion of the sliding body 23 as shown in FIGS. 3 to 6 (FIGS. 3 and 5 show drawings). For better visibility). The sliding body 23 is always urged by the pressing spring 25 in the direction in which the rotation of the wheel is locked, that is, in the right direction in the figure.

  When the handle 20 is rotated, the sliding body 23 is pulled by the wire 21 and slides in the left direction in FIGS. 3 to 6 to release the locked state. On the other hand, when the user releases the handle 20, the sliding body 23 is pressed and slid in the right direction in the figure by the pressing force of the pressing spring 25, and the pin 23a is fitted into the recess 24a to be in a locked state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The reference perspective view which shows a use condition. The front view which shows the wheel vicinity in a locked state. FIG. The front view which shows the wheel vicinity which canceled the locked state. FIG. The perspective view which shows the wheel part which provided the lock member. Explanatory drawing which shows the relationship between a bracket and a wheel. An explanatory view showing other embodiments of a handle part.

Explanation of symbols

13. ・ Wheel 20 ・ ・ Handle 21 ・ ・ Wire 23a ・ ・ Pin 24 ・ ・ Locking board 24a ・ ・ Recess

Claims (1)

  A lock mechanism for use in a handcart having a handle attached to an upper part of a frame constituting a vehicle body and a wheel attached to a lower part of the frame, the lock mechanism being connected to the wheel or integrally provided with the wheel. The locked state is maintained by fitting a pin urged by an elastic body into the recess of the board, and the lock state of the wheel is released by pulling the wire with the rotation of the handle and removing the pin from the recess. A lock mechanism of a hand cart characterized by that.

Images