JP7203310B2 - Locking mechanism with brake - Google Patents

Description

The present invention relates to a mechanism for decelerating and locking wheel rotation.

The brake mechanism of the handcart not only enables secure locking during parking, but also has a brake mechanism that can decelerate and stop when driving and avoid acceleration on slopes, etc., and is inexpensive and simple. A type that can be attached to the body is desired.

There is a patent application 2012-218935 as a prior art having both a wheel lock mechanism and a brake mechanism, but it is a unit configuration in which the brake mechanism and the stop mechanism are directly attached to the support leg, and can be retrofitted to a general-purpose caster. However, it is unsuitable for a trolley or the like because it is relatively expensive in terms of cost.

Patent application 2012-218935

The present invention has been made to solve the problems of the conventional method, and includes a braking mechanism for decelerating the rotation by pressing a brake piece against the tire of the wheel, and a stopping body attached to the wheel so that the rotation is stopped by the pawl. To provide a locking mechanism with a brake which constitutes a braking tool with a locking mechanism and is attached to a caster so that the same operation tool can be used as the braking mechanism and the locking mechanism.

Claim 1 is a braking tool to be mounted on a caster in which a wheel is rotatably supported on a wheel support frame, comprising a stopping body having an uneven groove on its periphery, and a pawl meshing with the stopping body on the frame. A brake body that presses the body and the wheel is mounted so that it can be lifted and lowered, and a lift body that has a vertical shaft and a pressure plate attached to the left and right of the rotating shaft is mounted rotatably below the braking body, and the vertical shaft is connected to the claw body. and a driving body in which the pressure plate is adjacent to the brake body and a rotating frame is connected to the lifting body, the stopping body is attached to the wheel of the caster, and the driving body is attached to the wheel support frame of the caster. By pulling the rotating frame after mounting, the claw body is released from the stop body to unlock the wheel, and when the rotating frame is further pulled, the brake body presses the wheel.
As a result, it is possible to steplessly decelerate the rotational speed of the wheel or to stop it completely by simply changing the way of gripping the same operating lever, which contributes to the safe running of a hand-pulled vehicle such as a trolley. Moreover, it is easy to spread by adopting the form of a braking tool.

The invention of the present application has a simple structure that interlocks the brake and the lock with a small stroke, and is a mechanism that is effective in terms of versatility and economy.

Front view of locking mechanism with brake Right side view of Fig. 1 Plan view of FIG. Front view of locking mechanism with brake built into caster Right side view of FIG. Front view showing locked state of lock mechanism with brake Front view showing unlocking of lock mechanism with brake Front view showing brake state of lock mechanism with brake Front view of trolley incorporating lock mechanism with brake Right side view of FIG.

Embodiments of the present invention will be described below.
First, the locking mechanism with brake will be described with reference to FIGS.
The locking mechanism with brake consists of a stop 3 attached to the wheel and a driver 4 for locking said stop and decelerating said wheel.
The stop body 3 has a circular plate with an uneven groove 3-1 on the peripheral edge thereof and a screw seat 3-2 for mounting to the wheel on the inner side of the groove. Incidentally, the screw seat is set to a dimension that meshes with a pawl body 18, which will be described later, when attached to the caster.
On the other hand, the driving body 4 is composed of a frame body 5 , a brake body 13 , a pawl body 18 , elevating bodies 20 and 21 and a rotating frame 22 .

First, the individual construction of the driver will be described.
The frame body 5 includes a bottom plate 6 having mounting holes 6-1 for simultaneously fixing the casters to a vehicle or the like, a front plate 7 having bearing holes 7-1a and 7-1b and guide holes 7-2, and the front plate. A rear plate 8 having bearing holes 8-1a and 8-1b and a guide hole 8-2 in the same manner as the plates, a left side plate 9 having a hole 9-1 for inserting a suspension bolt 17a for the brake body 13, Like the plate, it is composed of a right side plate 10 with holes 10-1 and an outer support plate 11 for wires at the right end.
The brake body 13 is configured by combining a holder 14 with elongated holes 14-1a and 14-1b and a guide plate 14-2 on the side and a brake piece 15 with screw holes 15-1a and 15-1b on the side. Screw holes 14-3a and 14-3b for supporting the elastic bodies 16a and 16b are provided in the vicinity of both ends thereof.
The pawl 18 has a protruding pawl 18-1 at its tip to be fitted into the concave-convex groove 3-1 of the stop body, a square groove 18-2 for guiding in the center, and vertical shafts 20-3 on both sides of the square groove. A long hole 18-3a for connecting to the vertical shaft 21-3 and a long hole 18-3b for connecting with the vertical shaft 21-3 are provided.
The lifting bodies 20 and 21 are connected to rotary shafts 20-1 and 21-1, pressing plates 20-2 and 21-2 for pressing the brake body 13 on the left side of the rotary shaft, and a rotating frame 22 which will be described later. Connecting pins 23 are provided at four locations, and vertical shafts 20-3 and 21-3 for moving the claw body 18 up and down are provided on the right side of the rotating shaft.
The rotating frame 22 is constructed by providing connection holes 22-1a, b, c, and d of the connecting pins 23 and a wire connector 22-2 at the tip.

Next, the overall configuration of the driving body will be described.
The lifting body 20 is placed in the bearing hole 7-1a of the front plate 7 attached to the frame 5 and the bearing hole 8-1a of the rear plate 8 with the pressure plate 20-2 attached to the lifting body on the left side and the rotating shaft 20-1. Similarly, the lifting body 21 is inserted into the bearing hole 7-1b of the front plate and the bearing hole 8-1b of the rear plate with the pressure plate 21-2 attached to the lifting body on the left side of the rotating shaft 21- A guide plate 14-2 attached to the holder 14 is placed above the elevating body 20 and the elevating body 21 in such a manner that the guide groove 7-2 of the front plate 7 and the rear plate Hanging bolts 17a and 17b, which are fitted in guide grooves 8-2 of frame 5 and have elastic bodies 16a and 16b in screw holes 14-3a and 14-3b provided near both ends of the holder, are attached to left side plate 9 of frame 5. and a hole 10-1 attached to the right side plate 10, the brake body 13 is fixed so that it can move up and down, and always biases the brake body 13 in the direction away from the wheel. .
Next, the claw body 18 is fitted into the guide plate 14-2 of the holder 14 in the square groove 18-2 of the claw body, and the vertical shaft 20-3 of the lifting body 20 is inserted into the long hole 18-3a attached to the claw body. After inserting the vertical shaft 21-3 of the lifting body 21 into the long hole 18-3b, respectively, the pin 19 is inserted into the guide plate 14-2 so as to vertically move up and down, and then the lifting body 20 is rotated. Connecting pins 23 are inserted into connection holes 22-1a and 22-1b attached to the frame 22 and holes 20-4a and 20-4b attached to the lifting body. A driving body 4 is constructed by inserting a connecting pin 23 into holes 21-4a and 21-4b attached to the elevating body and attaching an elastic body 24 between the left end of the rotating frame and the left side plate 9. are doing.
In this configuration, the lifting body is arranged in two places on the left and right in consideration of horizontal lifting and pressure uniformity of the brake body, but if the wheel diameter is small, etc., it may be arranged in one place in the center according to the application. .

Next, the state in which the lock mechanism with brake is incorporated in the caster and its operation will be described with reference to the drawings.
First, the state in which the lock mechanism with brake is incorporated in the caster will be described with reference to FIGS.
The stop body 3 is fastened to the screw seat 3-2 of the stop body by passing a bolt 25 through a hole 2-1 attached to the wheel of the wheel on the side of the wheel 2 which is rotatably attached to the wheel support frame 1 of the caster. The driving body 4 is built in at a position where the mounting hole 6-1 provided in the bottom plate 6 of the frame body 5 and the hole for fixing the wheel support frame are aligned under the stopping body, The caster and the carriage can be fixed simultaneously. Therefore, in the above state, the brake piece 15 is positioned appropriately to press against the wheel 2, and the pawl 18 is positioned to mesh with the stopping member 3 precisely, as shown in FIGS. There is.
Next, the operation of the brake-equipped lock mechanism will be described with reference to FIGS. 6, 7 and 8 omit illustration of the wheel support frame 1 for the sake of convenience.
FIG. 6 shows the positions of the brake piece 15 and the pawl 18 before the wire 25 is pulled. By rotating, the pressure plates 20-2 and 21-2 are separated from the holder 14, and the vertical shafts 20-3 and 21-3 lift the pawl 18 and engage with the stopper 3. As shown in FIG.
In other words, the brake mechanism for decelerating the rotation of the wheels 2 is free, and the lock mechanism for stopping the rotation of the wheels is active.
Next, when the wire 25 is pulled from the state shown in FIG. 6, the rotating frame 22 contracts the elastic body 24 and moves to the right, and the lifting bodies 20 and 21 connected to the rotating frame rotate clockwise. Then, as shown in FIG. 7, the pressure plates 20-2 and 21-2 come into contact with the holder 14 and start lifting the brake piece 15 toward the wheel, and the vertical shafts 20-3 and 21-3 push down the pawl 18, This is a state in which the pawl body is separated from the stop body 3 .
In other words, the brake mechanism that decelerates the rotation of the wheels 2 and the lock mechanism that stops the rotation of the wheels are in a free state.
When the wire 25 is further pulled from the state shown in FIG. 7, the rotating frame 22 further contracts the elastic body 24 and moves to the right, and the lifting bodies 20 and 21 rotate further clockwise, as shown in FIG. The vertical shafts 20-3 and 21-3 keep the pawl 18 separated from the stop body 3, and the pressure plates 20-2 and 21-2 further lift the brake piece 15 through the holder 14 and press against the wheel 2. state.
In other words, the lock mechanism for restraining the rotation of the wheels 2 is free, and the brake mechanism for decelerating the rotation of the wheels is active.

Next, the method of attaching and operating the lock mechanism with brake according to the present invention will be described.
First, an example of the mounting method to the truck will be described with reference to FIGS.
9 and 10 show locking mechanisms 50 and 51 with brakes built into the casters shown in FIGS. 4 and 5 on the base plate 101 of the truck 100, and the operating tool 200 in Japanese Patent Application No. 2013-244115 on the handle 102 of the truck. is attached, the other end of the right wire 202 connected to the operation tool is connected to the wire connection tool 22-2 attached to the lock mechanism 50 with a brake on the right side, and the left wire connected to the operation tool 202 is connected to the wire connector 22-2 attached to the locking mechanism 51 with brake on the left side, and FIG. The position of lever 201 is shown.

Next, an operation method in the above state will be described with reference to FIGS. Since the wire and brake-equipped locking mechanism after the operating tool are the same on the left and right sides, only the right side will be described.
When the operation lever 201 of the operation tool 200 is pulled upward from position A in FIG. 7, the trolley 100 can travel without using the brake, and even if the operating lever is pulled further upward from this state, the pawl 18 is further separated from the stopping body. In this detached state, the bogie can continue to run without using the brakes.
Then, when the operating lever is at the position C, the brake piece 15 comes into contact with the wheel 2, resulting in the state shown in FIG.
By further pulling the operating lever upward from the position C, the force with which the brake piece 15 presses against the wheel 2 is increased, and the braking force for decelerating the rotation of the wheel can be increased proportionally. .
When the operation lever 201 is released from the state shown in FIGS. 7 and 8 and returned to the position A, the pawl 18 is engaged with the stopping member 3 shown in FIG. 6 to lock the rotation of the wheel 2. .
Thus, by adjusting the way of gripping the same operation tool, it is possible to freely use locking of the wheels when the vehicle is parked or stopped, normal running without applying the brake, and deceleration running with applying the brake.
Although the lock mechanism with brake of the present invention is configured to be mounted on casters, it may be configured to be directly attached to the wheel support frame of casters without using a frame.

1 Wheel support frame 2 Wheel wheel 2-1 Hole 3 Stopper 3-1 Groove 3-2 Screw seat 4 Driver 5 Frame 6 Bottom plate 6-1 Mounting hole 7 Front plate 7-1a, b Bearing hole 7-2 Guide groove 8 Rear plate 8-1a, b Bearing hole 8-2 Guide groove 9 Left plate 9-1 Hole 10 Right plate 10-1 Hole 11 Outer support plate 12 Wire 13 Brake body 14 Holder 14-1a, b Long hole 14 -2 Guide plate 14-3a,b Screw hole 15 Brake piece 15-1a,b Screw hole 16-1a,b Elastic body 17-1a,b Hanging bolt 18 Claw body 18-1 Claw 18-2 Square groove 18-3a , b long hole 19 pin 20 lifting body 20-1 rotating shaft 20-2 pressure plate 20-3 vertical shaft 20-4a, b hole 21 lifting body 21-1 rotating shaft 21-2 pressure plate 21-3 vertical shaft 21- 4a, b Hole 22 Rotating frame 22-1a, b, c, d Connection hole 22-2 Wire connector 23 Connection pin 24 Elastic body 25 Bolt 50 Lock mechanism with brake 51 Lock mechanism with brake 100 Carriage 101 Base plate 102 Handle 200 Operation tool 201 Operation lever 202 Right wire 203 Left wire

Claims (1)

A braking device attached to a caster in which a wheel is rotatably supported by a wheel support frame,
a stopping body having uneven grooves on its periphery;
A pawl meshing with the stop body and a brake body press-contacting the wheel are attached to the frame so as to be vertically movable,
A vertical shaft and a pressure plate are provided below the brake body on the left and right sides of the rotating shaft. a driving body connected to the frame and rotatably attached to the frame,
Attaching the stop body to the wheel of the caster, mounting the driving body on the wheel support frame of the caster, and
A brake-equipped lock characterized in that the wheel is unlocked by pulling the rotating frame to disengage the pawl from the stopping body, and further pulling the rotating frame presses the wheel with the brake body. mechanism.

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