JPH0627427U - Brake structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a brake structure having a simple structure and capable of being brought into a braking state and a locking state only by a hand operation. [Structure] A gate-shaped frame 14 that can be gripped together with a grip bar 11 is swingably provided. Interlocking mechanism 33 for contacting and separating the brake member 15 from the wheel 9 by swinging the gate-shaped frame 14
To provide. Decelerate depending on the swing angle of the gate type frame 14.
A braking / lock switching mechanism (38) is provided for shifting to a braking state where it can be stopped and a locked state where it cannot run.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brake structure for a silver car or the like.

[0002]

[Prior art]

 In the past, some silver cars, strollers, etc. were equipped with a stopper mechanism that locked the wheels to prevent self-propelling, but the stopper mechanism had a structure that could not be used as a braking brake. .

[0003]

[Problems to be solved by the device]

 Moreover, since the stopper mechanism is disposed near the wheels, it cannot be operated at hand, which is inconvenient. Further, if both brakes and stoppers are to be provided, the structure becomes complicated and the number of parts increases.

Therefore, an object of the present invention is to provide a brake structure that solves the above-mentioned conventional problems.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an interlocking mechanism in which a gate frame that can be held together with a grip bar is swingably provided, and the brake member is brought into contact with and separated from a vehicle wheel by swinging the gate frame. Further, according to the swinging angle of the gate-shaped frame, a braking / lock switching mechanism for shifting to a braking state where deceleration / stop is possible and a locked state where self-propelling is impossible is provided.

[0006]

[Action]

 From the non-braking state where the brake member is separated from the wheel, grasp and grasp the grip bar and the gate frame, and swing the gate frame upward within a predetermined angle range. Can contact the wheels to put them in a braking state.

From this braking state, if the gate-shaped frame is further swung beyond the above-mentioned predetermined angle range, the brake member is pressed against the wheels to be locked, and the locking is performed by the braking / lock switching mechanism. The state can be retained.

In this way, the braking operation and the locking operation can be performed easily and smoothly at hand, and the wheels can be reliably locked. Moreover, since the braking (mechanism) and the lock (mechanism) are shared, the structure is simple.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 1 shows an embodiment of a brake structure according to the present invention. The brake structure 1 is used, for example, in a pushcart 2 such as a silver car or a stroller.

The handcart 2 in the illustrated example has a U-shaped body frame 3, front and rear stays 4, 4, 5 and 5 and handle posts 6, 6 pivotally attached or fixed to the body frame 3, and front and rear stays. Front and rear axles 7, 8 fixed to 4, 4, 5, 5; wheels 9 pivotably attached to the front and rear axles 7, 8; and U-shaped handle members attached to the handle posts 6, 6. 10 and.

The handle member 10 is composed of a horizontal grip bar 11 and left and right vertical support portions 12a and 12b, and a portal frame is provided between the flat protruding case portions 13a and 13b of the left and right vertical support portions 12a and 12b. 14 is swingably attached.

Further, in the illustrated example, a brake member 15 made of a band plate material or the like is attached to the rear stays 5 and 5 so as to be swingable around the axes A and A, and protrusions 16 at the left and right ends of the brake member 15 are provided. 16 is configured to be able to contact and separate from the rear wheels 9, 9.

A first elastic member 18 such as a tension coil spring is interposed between the horizontal connecting portion 17 of the brake member 15 and the rear axle 8, and the protrusions 16 and 16 have rear wheels 9, It is always urged in a direction away from 9.

On the other hand, inside the case portions 13a and 13b of the left and right vertical support portions 12a and 12b, as shown in FIGS. 2 and 3, an operation lever 19 which can be swung around an axis B and a small bulge are provided. An engaging pin 21 having a portion 20 and a second elastic member 22 such as a compression coil spring are provided respectively.

The tip of the operating lever 19 projects to the outside through the upper wall window 23 of the case 13a (13b) so that it can be operated from the outside.

The tip end portion 24 of the engagement pin 21 is slidably inserted into the through hole 25 of the operation lever 19, and the small bulge portion 20 abuts on one end surface of the operation lever 19. The base end portion 26 of the engagement pin 21 is slidably held by the holding piece 27 of the case portion 13a (13b).

The second elastic member 22 is externally fitted to the base end portion 26 of the engagement pin 21, and is interposed between the holding piece 27 and the small bulge portion 20. As a result, the operating lever 19 and the engagement pin 21 are constantly elastically urged inward in the left and right direction (direction of arrow C).

In FIG. 3, 28 is a side wall hole portion of the case portion 13a (13b), which is formed so that the front end portion 24 of the engagement pin 21 can be inserted therethrough.

Further, as shown in FIGS. 2, 3 and 4, a disk-shaped rotating member 30 is attached to the outer surface of the side wall 29 of the case portion 13a (13b) so as to be rotatable around the axis D. Further, the portal frame 14 is connected to the rotating member 30.

The rotating member 30 has locking holes 31 arranged on a predetermined circular pitch centered on the axis D, and the locking holes 31 are engaged with the distal end portions 24 of the engaging pins 21. Formed possible. A bowl-shaped cover 32 is attached to the case portion 13a (13b).

The rotating member 30, the operating lever 19, the engaging pin 21, the second elastic member 22 and the like constitute a braking / lock switching mechanism 38 for shifting to a braking state and a locking state as described later. In this way, the braking / lock switching mechanism 38 is provided in each of the case portions 13a and 13b.

Further, in the illustrated example, the brake member 15 is swung toward the left vertical support portion 12 a side by the swing operation of the portal frame 14, and the protrusions 16 and 16 are connected to the rear wheels 9 and 9. An interlocking mechanism 33 for contacting / separating is provided.

The interlocking mechanism 33 has a wire 34 that connects the rotating member 30 on the left vertical support portion 12 a side and the horizontal connecting portion 17 of the brake member 15, and a cover hose 35 that inserts the wire 34. One end of 35 is attached to the holding portion 36 of the cover 32, and the other end of the cover hose 35 is attached to the holding projection 37 of the rear stay 5.

Then, in a non-braking state in which the protrusion 16 of the brake member 15 is separated from the rear wheel 9 (is capable of running), the gate-shaped frame 14 in the example shown in FIG. The length of the wire 34 is adjusted so that the tip end 24 of the engaging pin 21 contacts the rotating member 30.

In order to bring the protrusion 16 of the brake member 15 into contact with the rear wheel 9 from this non-braking state to bring it into the braking state, as shown in FIGS. 2 and 4, the grip bar 11 and the gate frame 14 are provided. It is sufficient to grasp and grasp and to swing the gate type frame 14 upward (direction of arrow E).

That is, the rotating member 30 rotates in the direction of the arrow E as the gate frame 14 swings, the wire 34 is pulled upward, and the brake member resists the elastic force of the first elastic member 18. 15 swings (as indicated by an imaginary line), the protrusion 16 comes into contact with the rear wheel 9 to enter a braking state, and the handcart 2 can be decelerated and stopped. In this case, the front end portion 24 of the engagement pin 21 makes sliding contact with the rotating member 30.

Further, from the braking state, the maximum swing angle range θ of the braking state is exceeded in order to bring the protruding portion 16 of the brake member 15 into pressure contact with the rear wheel 9 and lock the vehicle in the locked state. Then, the gate-shaped frame 14 may be further swung in the arrow E direction until the positions of the locking hole 31 and the engaging pin 21 are aligned.

That is, when the locking hole 31 of the rotating member 30 rotates in the direction of the arrow E with the swing of the gate-shaped frame 14 to reach the lock angle (maximum swing angle range) θ, the locking hole 31 The position of the engaging pin 21 and the position of the engaging pin 21 are aligned with each other, and the elastic force of the second elastic member 22 causes the front end portion 24 of the engaging pin 21 to be locked in the locking hole 31 and locks the handcart 2. It is possible to prevent self-propelling.

At this time, the small bulge portion 20 of the engaging pin 21 holds the operating lever 19 in a state of inclining to the left and right inward (direction of arrow C) (see FIG. 3).

In order to release this locked state, it is sufficient to tilt the operation lever 19 laterally outward (direction opposite to the arrow C direction) against the elastic force of the second elastic member 22. The tip 24 of the engagement pin 21 is disengaged from the locking hole 31, and the elastic force of the first elastic member 18 causes the gate frame 14 and the rotating member 30 to move in the direction opposite to the arrow E direction. Swing and rotate to return to the original non-braking state.

In this way, the braking force of the brake member 15 can be gradually increased / decreased and the locked state can be easily brought about only by the hand (swing) operation of the portal frame 14.

Moreover, the locked state cannot be released without operating the left and right operation levers 19, 19 at the same time, so it is safe because the lock is not released by accidentally touching with a hand or an object. .

[0034]

[Effect of device]

 Since the present invention is constructed as described above, it has a great effect as described below.

The grip bar 11 and the gate-shaped frame 14 are gripped and grasped, and the gate-shaped frame 14 can be brought into a braking state by swinging the gate-shaped frame 14 upward within a predetermined angle range. If 14 is further swung beyond the above-mentioned predetermined angle range, it can be locked.

As described above, in the brake structure of the present invention, the so-called brake (braking) and stop (lock) are combined, so the structure is simple, the number of parts is small, and it is easy to handle. Moreover, the braking operation and the locking operation can be performed smoothly.

Moreover, since the operation portion is of a gate type, it is convenient because it can be operated at any position. In addition, it can be securely locked, which is safe.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part.

FIG. 3 is an explanatory diagram showing an internal structure of a case section viewed from the front.

FIG. 4 is an explanatory diagram of a usage state seen from a side surface.

[Explanation of symbols]

 9 Wheels 11 Grip bar 14 Gate type frame 15 Brake member 33 Interlocking mechanism 38 Braking / lock switching mechanism

Claims (1)

[Scope of utility model registration request] 1. A portal frame 14 that can be gripped together with a grip bar 11 is provided so as to be swingable, and an interlocking mechanism 33 that makes the brake member 15 contact and separate from the wheel 9 by the swinging of the portal frame 14 is provided. Further, a braking structure characterized by further comprising a braking / lock switching mechanism 38 for shifting to a braking state where deceleration / stop is possible and a locked state where self-propelling is impossible depending on the swing angle of the gate frame 14.