JPH0780461B2 - Wheelbarrows for baby car, shopping car for the elderly, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Object of the Invention" a. Field of Industrial Application The present invention relates to a handcart such as a baby stroller or a shopping cart for the elderly that performs a braking operation and a locking operation at hand.

b Related Art Although there are models that perform a brake operation above the handle bar of a stroller or the like, that is, at the hand, the lock operation is performed by locking or releasing the wheels by depressing the pedal with the feet. As a model for performing both the brake operation and the lock operation at hand, there is a device according to Japanese Utility Model Publication No. 61-31893, in which the abutting ends of two rods are connected in a sliding manner. Both ends of the formed brake main body are pivotally attached to the rear pipe, the lower end of the inner wire that can be operated at hand is connected to the sliding connection part, and both ends of the brake main body are pressed against the rear wheel to operate the brake and lock the wheel. You are operating.

c Problems to be solved by the invention A locking device for performing a locking operation needs to be provided separately from the braking device, and the locking operation by the toes causes a strong urge to win, which may damage the locking device. In addition, the operation of the toes is often uncertain, and therefore the operator may have to perform a complicated bending operation by holding his / her back and operating it with fingers. Further, in the device disclosed in Japanese Utility Model Publication No. 61-31893, when both ends of the brake main body are pressed against the rear wheels to lock the wheels, if the vehicle body is pushed hard, the wheels may be forced to rotate. Not safe.

[Structure of the Invention] a Means for solving the problem A rod rod is rotatably laterally extended between the leg rods equipped with wheels at a position slightly above the axle, and an operating rod is T-shaped at the end of the rod rod. It is fixed, and one end of the operating rod is bent to the wheel side to form a braking part, and a lock rod is projected at the other end of the operating rod toward the inside of the wheel, and the lock rod is detachably engaged. A radial groove is formed so as to project from the inner center of the wheel to form a lock member, which is close to the horizontal portion of the gate-shaped handle rod, and is provided with a brake operating rod in parallel with one end of the brake operating rod. A lock member provided with a long hole slidably inserted loosely and a cam contactor holding one end of the brake operating rod is fixed to the upper part of the handle rod, and one end of the brake operation rod loosely inserted into the long hole and the above-mentioned operation Connect the traction member over the end of the rod, and
A pressing spring for urging the lock rod provided on the operating rod in the direction of engaging with the groove of the lock member provided on the wheel is mounted on the lower part of the leg rod and near the end of the operating rod, and the cam contactor rises. The braking part of the operating rod is separated from the rear wheel to make it a neutral state, and then the brake operating rod is pulled up by hand to apply braking, and the falling action of the cam contact causes the locking rod of the operating rod to move to the wheel. The purpose of the present invention is to securely lock the wheel by engaging with the groove provided in the lock member.

b Actions and Examples Therefore, according to the present invention, by pulling up the brake operating rod at hand with the fingers, the operating rod is pressed against the wheel through the pulling member to brake and the operation handle at the pressing side is pushed down. Even if the lock rod of the operating rod is engaged with the lock member provided on the wheel by releasing the grip of the brake operating rod, the wheel is locked and the vehicle body stops.

An embodiment of the present invention will be described below with reference to the drawings. The rod rod (4) is rotatable over the rear leg rods (3) (3) at a position slightly higher than the axle (2) equipped with the rear wheel (1). Supported on the rod rod (4), the center portion of the operating rod (5) having a braking portion (5a) bent at both ends of the rod rod (4) is fixed in a T shape, and the braking portion (5a) is attached to the rear wheel (1). ) To make a braking action, and further, a locking rod (5b) is projected from the other end of the operating rod (5) so as to face the braking part (5a), and a large number of radials are formed at the center of the rear wheel (1). Locking member (6) provided with the groove (6a), the lock rod (5b) is disengageably engaged with the groove (6a), and the lock rod (5b) is attached to the one operating rod (5). ) The inner wire fastening piece (6b) is projected from the projecting point of () toward the fixed side of the rod (4) .The center of the gate-shaped handle rod (7) is attached to the rear leg rod (3).
The pivot side is pivotally attached to the central part of the to form an open side on the front leg rod (7a), and the brake operating rod (8) is provided parallel to and close to the horizontal portion of the handle rod (7), A vertically elongated hole (9a) for loosely inserting one end of the brake operating rod (8) is provided, and the brake operating rod (8) is brought into contact with the lower surface of the brake operating rod (8) loosely inserted in the vertically elongated hole (9a) to make the vertically elongated hole (8). A cam contactor (9b) to be slid along 9a) is fitted up and down freely, and an operation handle (10) is fixed to the side end surface of the cam contactor (9b),
When the operating handle (10) is erected in the direction along with the handle rod (7), the cam contactor (9b) is erected and pushes up the handle operating rod (8) diagonally upward, and when operating it 90 degrees forward, the handle is operated. The rod member (8) is slid downwardly downward, and when the operating handle (10) is erected, a lock member (a magnet fixed to a predetermined position for adsorbing the operating handle (10) and holding the standing state ( Secure 9) to the handle rod (7) in place. The outer tube (13) covering the inner wire (12) constituting the pulling member is inserted into the lock member (9) to fix the upper end of the inner wire (12) to the tip of the brake operating rod (8), and the rear leg rod ( The inner wire (3) provided with a bracket (14) at a position close to the rod (4) to fix the lower end of the outer tube (13) and the lower end of the inner wire (12) to the operating rod (5). It is fixed to the fastening piece (6b) and a pressing spring (15) is mounted between the bracket (14) and the inner wire fastening piece (6b), and a rod may be used instead of the inner wire. . Further, with the cam contactor (9b) standing upright as shown in FIG. 4, the brake operating rod (8) is positioned in the middle of the vertically elongated hole (9a), and the braking portion (5a) of the operating rod (5) is moved. ) And lock bar (5
b) is kept in a neutral state, and then the brake operating rod (8) is pulled up to press the braking portion (5a) against the rear wheel (1) for braking, and the cam contactor (9b) is moved forward. When tilted, the elastic force of the pressing spring (15) causes the lock rod (5b) integrated with the brake operating rod (8) and the operating rod (5) to move downward and engage with the groove of the lock member (6). Lock the rear wheel (1) so that it does not rotate.

[Advantages of the Invention] According to the present invention, the lock device and the brake device can be operated at hand, which is convenient, and it is not necessary to separately provide both devices. Further, since the operation is performed by fingers, there is no risk of damaging the locking device as compared with the conventional locking operation by the toes, and the operation by the fingers is sure, and when the locking is uncertain like the operation by the toes, one by one The inconvenience of bending over to fix the lock is eliminated.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is an enlarged front view showing a braking part and a lock part, and FIG. 3 is a right side view showing the same.
FIG. 4 is a front view showing the operating portion, FIG. 5 is a left side view of the same, and FIG. 6 is a plan view showing an operating rod. (1) …… Rear wheel, (2) …… Axle, (3) …… Rear leg rod,
(4) …… rod rod, (5) …… operating rod, (5a) …… braking part, (5b) …… lock rod, (6) …… lock member, (6
a) ... groove, (7) ... handle rod, (8) ... brake operating rod, (9) ... lock member, (9a) ... longitudinal hole,
(9b) …… Cam contact, (10) …… Operating handle, (1
2) …… Inner wire, (13) …… Outer tube, (1
5) ... Pressing spring

Claims (1)

[Claims] 1. A rod rod is rotatably laterally extended between leg rods mounted with wheels at a position slightly above the axle, and an operating rod is fixed to the end of the rod rod in a T-shape, and one end of the operating rod is attached. Is bent toward the wheel side to form a braking portion, and at the other end of the operating rod, a lock rod is projected toward the inside of the wheel, and a radial groove for engaging the lock rod in a detachable manner is formed in the center of the inside of the wheel. A long hole that is formed by projecting on the above-mentioned part to form a locking member, approaches the horizontal part of the gate-shaped handle rod, and is provided with a brake operating rod in parallel with it, and one end of the brake operating rod is slidably loosely inserted. And a lock member rotatably provided with a cam contactor that holds one end of the brake operation rod is fixed to the upper part of the handle rod, and the operation handle is fixed to the side end surface of the cam contactor, which is loosely inserted into the long hole. Connect a traction member across one end of the brake operating rod and near the end of the operating rod. In addition, a stroller and an old man, in which a pressing spring for urging the lock rod provided on the operating rod in the direction of engaging with the groove of the lock member provided on the wheel is mounted on the lower portion of the lever rod and near the end of the operating rod, For shopping carts and other wheelbarrows.