JP5002469B2 - Handle device for handcart with brake device - Google Patents

Description

  The present invention relates to a handle device for a hand cart with a brake device.

  At the rear end of the loading platform supported by the front and rear wheels, a mandrel-like operation handle is provided, with leg rods provided on both sides of the operation rod. A brake device that keeps the rear wheel in a non-running state at all times, supports a downward U-shaped brake release handle so that it can rotate, and has an operation rod on the operation handle and mounting rods on both sides of the release rod. 2. Description of the Related Art A hand cart is known in which a release rod of a brake release handle is positioned in the vicinity where it can be grasped simultaneously with a hand (for example, Patent Document).

Japanese Utility Model Publication No. 7-31560

  The hand cart described in the above publication employs a configuration in which a release rod of the brake release handle is arranged on the lower rear side of the operation rod of the operation handle (which controls the moving direction of the vehicle). When releasing and setting the rear wheel or the handcart to the running state, it is necessary to hold the release rod with the thumb of the hand and hold the release rod together with the operation rod, which is a thumb against spring bias. Holding the release rod by only requires a certain amount of physical strength.

  The present invention pays attention to the disadvantages of such a conventional example, and holds the release rod so that the release rod can be held by the other four fingertips except the thumb by positioning the release rod in front of the operation rod. The invention was devised for the purpose of providing an apparatus that can be performed relatively easily and that avoids the disadvantages of disposing the release rod in front of the operation rod.

  At the rear end of the loading platform supported by the front and rear wheels, a gate-like operation handle is installed with leg rods on both sides of the operation rod, and the rear of the operation handle is spring-biased. A brake device that has a downwardly U-shaped brake device that keeps the side wheels in a non-running state at all times. The brake release handle is rotatably supported, and the operation handle of the operation handle and the attachment rods are provided on both sides of the release rod. In a handcart with a brake device in which the release rod of the brake release handle is positioned in the vicinity of being gripped at the same time by a hand, a central rod and side rods provided on both sides of the central rod are provided at the front edge of the operation handle. A guard frame comprising: the side rod fixed to the leg rod and protruding toward the front of the operation handle; and the release of the brake release handle between the center rod of the guard frame and the operation rod of the operation handle. From the central wall And towards it to a configuration in which is interposed.

  According to the present invention, since the brake release handle release rod is arranged in front of the operation handle operation rod, the thumb does not have an external force load when the handcart is moved and moved. Since the other four fingers hold the release handle against the external force and grip them simultaneously, the brake release state with the brake release handle against spring bias can be easily and maintained. Can do. In the non-running state, even if the load collapses, the center rod of the guard frame located in front of the brake release handle receives the load from the load and prevents the load from being applied to the brake release handle. The risk of releasing the brake state due to the load of can be eliminated, and a highly safe handcart can be provided.

  The drawings show an embodiment of a handle device for a hand cart with a brake device according to the present invention, FIG. 1 is a partially cutaway front view, FIG. 2 is a partially enlarged view of FIG. Is a right side view of FIG. 2, and FIG. 4 is another partially enlarged view of FIG.

  The handle device according to the present invention supports a loading platform 1 with a pair of front and rear wheels 2 and 3, and is a brake device that restricts rolling of a rear wheel 3 constituted by fixed wheels (fixed casters) in the wheels 2 and 3. 4, a brake release handle 5, an operation handle 6 for controlling the moving direction of the loading platform 1, that is, the transport vehicle A, and a guard frame 7.

  The brake device 4 has a plurality of locking holes 10,... Arranged concentrically around the axle on a locking plate 9 overlaid on one side of a disc wheel that constitutes the rolling wheel 8 of the rear wheel 3 together with a rubber tire. Then, a base portion of the brake rod 11 that engages and disengages the appropriate locking hole 10 is interposed between one free ends of the pair of L-shaped actuating pieces 12 and 12 and is pivotally attached to each other. The operating piece 12 is pivotally attached to the device base frame 14 projecting from the vehicle frame (side piece) 13 of the rear wheel 3 at the base end portion so as to be rotatable in the vertical axis. The front end of the moving member 15 is connected to the end portion by a connecting shaft 20 which is rotatable in the vertical axis and guided by the long hole of the device base frame 14, and a connecting pin is connected to the rear end portion of the moving member 15. 16 protrudes along the axle, and the moving member 15 is moved forward between the connecting pin 16 and the device base frame 14. A coil spring 17 to be urged is stretched, and an arm piece 18a projecting from one end of an intermediate rod 18 supported rotatably on the loading platform 1 is connected to the connecting pin 16 and the intermediate rod 18 A second arm piece 18 b protruding from the other end is connected to the brake release handle 5 via a link mechanism 19.

  Then, when the rolling wheel 8 is in the rolling state, when the fingertip is released from the brake release handle 5, the connection pin 16 is pulled and moved from the rear end side to the front end side by the action of the coil spring 17, Since the connecting pin 16 protrudes (assembles) on the moving member 15, the moving member 15 moves forward so as to be pressed by the connecting pin 16 (moves in the front end direction), and is attached to the device base frame 14. Since the operating piece 12 pivotably attached is connected to the moving member 15 by the connecting shaft 20, it rotates about the support shaft as the connecting shaft 20 moves along the guide long hole. As a result, The brake rod 11 connected to the actuating piece 12 moves along the axis of the rolling wheel 8 and engages with a locking hole 10 existing at the tip position to restrict the movement of the rolling wheel 8 (braking operation is performed). .

  Further, the brake release handle 5 is operated with a fingertip, and the connecting pin 16 is moved in the opposite direction (from the front end side to the rear end side direction of the loading platform 1) against the bias of the coil spring 17 via the link mechanism 19. As a result, the moving member 15 and the operating piece 12 connected to the connecting pin 16 are also returned to their original positions, and the brake rod 11 is detached from the locking hole 10, and the rolling state of the wheel can be obtained from the wheel braking state.

  In short, in the brake device of the embodiment, the brake rod 11 always restricts the movement of the rear wheel by the urging of the coil spring 17, and the release rod 5a of the release handle 5 is operated by the operation handle 6 in this restricted state. The above restriction is released by grasping with the fingertip together with the heel 6a, and the directionally movable movement of the transport vehicle (the direction of which is braked by the operation handle 6) is permitted.

  The operation handle 6 is composed of a gate-like frame body in which leg rods 6b and 6b are relatively provided on both sides of the operation rod 6a, and the upper side of the leg rod 6b is bent and inclined rearward, and a lower end portion of the leg rod 6b. Is connected to the rear end of the loading platform 1 and is erected on the loading platform 1 (usually freely foldable). In general, an operation rod 6a composed of a central rod arranged between the leg rods 6b and 6b is provided. The movement direction is controlled by holding the fingertip.

  The upper portion 6 'of the operation handle 6 is inclined because the operation rod 6a of the upper portion 6' is separated from the loading platform 1 so that the foot does not hit the loading platform 1 during the moving operation. This is to ensure a space between the load placed on 1 and the operating rod 6a and to smoothly hold the operating rod 6a by the hand.

  A piece 6b 'protrudes rearward from an intermediate portion of the leg rod 6b of the upper portion 6' of the operation handle 6, and mounting rods 5b and 5b are provided on both sides of the release rod 5a relative to the piece 6b '. The downward U-shaped brake release handle 5 configured as described above (located between the leg rods 6b, 6b of the operation handle 6) is pivotally attached to the support shaft 21 at the base of the mounting rod 5b. An upper end portion of the upper component hook 9a of the link mechanism 19 is pivotally connected to the middle portion of the mounting rod 5b of the brake release handle 5 by a connection pin 22, while the release rod 5a of the handle 5 is an operation handle. 6 is disposed between the operating rod 6a and the upper rod 7a of the guard frame 7, that is, in front of the operating rod 6a, behind the upper rod 7a and below, and simultaneously with the operating rod 6a. Arranged in a positional relationship that can be held (held) by the hand, Location position, the coil spring 17, connecting pin 16, is ensured at all times by the urging through the intermediary rod 18 and the link mechanism 19.

  The guard frame 7 is composed of a downwardly U-shaped frame that is configured by providing side flanges 7b and 7b on both sides of the upper flange 7a. The upper rod 6b is welded to the upper edge of the leg rod 6b and is erected in a direction substantially perpendicular to the side rod 7b. The upper rod 7a between the side rods 7b and 7b is the lower portion 6 of the operation handle 6. It is located behind the front edge of the leg rod 6 part arranged substantially vertically on the ″ side so as not to interfere with the loading of the load on the loading platform 1 and to be located on the upper front side from the release rod 5a. Is arranged.

  Since the operation handle 6, the brake release handle 5 and the guard frame 7 are in the above arrangement relationship, even if the load collapse on the loading platform 1 occurs above the release bar 5a, the fallen load is released by the guard frame 7. Since it does not fall directly onto the handle 5 (release rod 5a) and no movement occurs against the bias of the coil spring 17 of the release handle 5 due to the fall, the wheel braking is released due to the collapse of the load. Therefore, it is possible to provide a hand cart with a brake device that does not cause an unexpected accident.

Partially missing front view. The elements on larger scale of FIG. 1 of this invention principal part. The right view of FIG. The other partially enlarged view of FIG.

Explanation of symbols

1 Loading platform 2 Front wheel 3 Rear wheel 4 Brake device 5 Brake release handle 5a Release rod 5b Mounting rod 6a Operation rod 6b Leg rod 7 Guard frame 7a Center rod 7b Side rod

Claims (1)

  At the rear end of the loading platform supported by the front and rear wheels, a gate-like operation handle is installed with leg rods on both sides of the operation rod, and the rear of the operation handle is spring-biased. A brake device that has a downwardly U-shaped brake device that keeps the side wheels in a non-running state at all times. The brake release handle is rotatably supported, and the operation handle of the operation handle and the attachment rods are provided on both sides of the release rod. In a handcart with a brake device in which the release rod of the brake release handle is positioned in the vicinity of being gripped at the same time by a hand, a central rod and side rods provided on both sides of the central rod are provided at the front edge of the operation handle. A guard frame comprising: the side rod fixed to the leg rod and protruding toward the front of the operation handle; and the release of the brake release handle between the center rod of the guard frame and the operation rod of the operation handle. From the central wall If in the interposed therebetween, the carts of the handle device with a braking device.

Images