JP2011235662A - Caster with brake, caster unit, truck including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caster to be reliably braked independently of a state of a peripheral surface of a wheel of the caster and the direction of the wheel, and to provide a caster unit with two or more casters, and to provide a truck with the casters attached thereto.SOLUTION: The caster with brake includes: a brake drum and a brake shoe which can be brought into pressure-contact with each other or can be released from the pressure-contact; a shoe operating tool for opening and closing the brake shoe; a driving mechanism for operating the shoe operating tool; and an operating section for operating the driving mechanism. The operation of the operating section is transmitted to the shoe operating tool to operate the shoe operating tool. When the driving mechanism is operated by the operation of the operating section, the shoe operating tool brings the brake shoe into pressure-contact with the brake drum to brake the wheel. When the operation of the operating section is released, the pressure-contact is released to release the braking.

Description

  The present invention relates to a caster with a brake suitable for use by being attached to a carriage, a caster unit in which two or more casters with a brake are unitized, and a carriage to which these are attached.

  A caster is provided on the bottom of the body of the handcart used for carrying the luggage. A cart with casters is easy to move and very convenient for carrying luggage, but it is difficult to brake the casters (braking), so when carrying heavy loads such as steel materials and carrying downhill slopes, There was a problem that the dolly traveled by the load, and the dolly traveled on the down slope without permission. In order to solve this problem, a hand cart equipped with a brake device has been proposed. As an example, there is a cart with a brake device that brakes the movement of the cart by controlling the rotation of the wheel by pressing a brake plate against the outer peripheral surface of the wheel of the caster (Patent Document 1).

JP 2002-250370 A

  Since the cart with a brake device described in Patent Document 1 presses the brake plate directly against the outer peripheral surface of the wheel of the caster, depending on the case where the wheel is wet with rain or the state of the outer peripheral surface of the wheel, the rotation of the wheel Cannot be reliably braked, or there is a problem that the wheel is worn by pressing of the brake plate, and the use of the brake may be deteriorated by long-term use. In addition, since the brake plate is fixed to the rear surface of the vehicle body, in the case of a rotary caster in which the wheel of the caster can rotate 360 degrees, there is a problem that the brake plate does not press the wheel depending on the direction of the wheel.

  The problem to be solved by the present invention is that a caster that can reliably brake (brake) regardless of the state of the outer peripheral surface of the wheel of the caster and the direction of the wheel, a caster unit having two or more casters, and It is to provide an installed carriage.

  The caster with a brake according to the present invention is a caster with a brake having a brake for braking and releasing the rotation of the wheel of the free caster. The brake drum, the brake shoe, and the brake shoe that can be pressed and released from each other can be opened and closed. A shoe operating tool; a drive mechanism for operating the shoe operating tool; and an operating unit for operating the driving mechanism. One of the brake drum and the brake shoe is provided on a wheel, and the other is provided near the side. The operation tool is provided near the brake shoe, and the drive mechanism is provided between the operation unit and the shoe operation tool, and the operation of the operation unit is transmitted to the shoe operation tool to operate the shoe operation tool. When the drive mechanism is operated by operating the operation unit, the operating tool presses the brake shoe against the brake drum to brake the wheel, Wherein the operation of the operation part is released the pressure is released is obtained as braking is released.

  The caster with brake according to the present invention is the caster with brake. In the caster with brake, the drive mechanism moves up and down by operating the operation unit, and the shoe operating tool is operated by following the up and down movement of the lift to operate the brake shoe. A link mechanism that press-contacts the brake drum may be provided. It is preferable that the lifting tool is disposed on the rotation center axis of the free caster so as not to be displaced from the rotation center axis even when the free caster rotates. The drive mechanism may be an operation shaft, and the operation shaft may be attached to the pedestal so as to be rotatable in the direction around the axis or slidable in the axial direction. A pedestal for mounting the caster frame is provided, and the operation unit can be arranged in the pedestal.

  The caster unit with a brake according to the present invention is arranged such that the caster with a brake is arranged two or more sideways or front and rear at intervals, and the drive shaft of the caster with a brake is common, and the drive shaft is operated by one operation unit. It is made to drive by. In this case, the base of the caster with a brake can also be connected with one connecting material.

  The cart of the present invention is a cart having a caster on a vehicle body capable of carrying a load, and the caster with a brake or a caster unit is rotatably attached to the vehicle body. In this case, a caster with a brake or a pedestal of a caster unit can be attached to the vehicle body, and the operation unit can be arranged in the space of the pedestal.

The caster with brake of the present invention has the following effects.
(1) The above-described operation, which can brake the rotation of a wheel of a caster by press-contacting a wheel and a brake shoe and a brake drum provided in the vicinity of the wheel by operating an operation unit (for example, a manual or stepping type handle). By releasing the operation of the part, the brake shoe and the brake drum are separated from each other and the wheel rotates, so that braking and release of the wheel can be easily and reliably performed only by operating the operation part.
(2) A lift mechanism in which the drive mechanism of the brake device moves up and down by operation of the operation unit, and a link mechanism that presses the brake shoe against the brake drum by operating the shoe operating tool by following the lifting operation of the lifting tool. When it is provided, the configuration is simplified.
(3) Since the lifting tool is arranged on the rotation center axis of the free caster so that the position of the caster wheel does not shift from the rotation center axis even if the free caster rotates, the wheel of the caster is in any direction of 360 degrees in the horizontal direction. Even if it is facing, it is possible to reliably brake the rotation of the wheel.
(4) When the operation unit is used as an operation shaft and the operation shaft is attached to the pedestal so as to be rotatable around the axis or slidable in the axial direction, the configuration of the operation unit is simplified.
(5) When a pedestal for mounting a caster frame is provided and the operation unit is arranged in the pedestal, the operation unit can be easily attached to the carriage, and the operation unit can be made compact and concise and downsized.

  Since the caster unit with brake of the present invention has a common drive shaft for two or more casters with brake, the wheels of two or more casters can be braked and released by operating one operation unit.

  Since the cart of the present invention is provided with a caster or unit with a brake on the vehicle body, it is possible to reliably brake and release the wheel, and it is easy to control the stop and start of the vehicle even if a heavy load is mounted on the vehicle body.

The disassembled perspective view which shows an example of the usage condition of the trolley | bogie provided with the caster with a brake device of this invention. The disassembled perspective view which shows an example of the caster with a brake device of this invention. Sectional drawing which shows an example of the caster with a brake device of this invention. It is operation | movement explanatory drawing of the brake shoe of the caster with a brake device of this invention, (a) is explanatory drawing of a non-contact state, (b) is explanatory drawing of a contact state. The vertical side view at the time of the non-braking which shows an example of the caster with a brake device of this invention. The vertical side view at the time of braking which shows an example of the caster with a brake device of this invention. An example at the time of making the operating shaft of this invention into a slide type is shown, (a) is explanatory drawing before sliding an operating shaft, (b) is explanatory drawing after a slide.

(Overview of casters with brakes, units, and carts)
A caster with a brake, a unit thereof, and a carriage according to the present invention will be described with reference to the drawings. What is shown in FIG. 1 is an outline of the caster 1 with a brake, the unit 2, and the carriage A, and the operation shaft 3 of the two casters 1 with a brake arranged at intervals on the left and right is shared by one axis. The casters 1 with both brakes are connected by a horizontally long plate-like connecting member 4 (the intermediate portion in the horizontal direction is omitted in the figure) to form a caster unit 2.

(Caster with brake)
The two casters with brakes 1 shown in FIG. 1 are the same, and an upward U-shaped base 5 is attached under the plate-like connecting material 4, and the brakes 7 are provided on the casters 6.

(caster)
The caster 6 shown in FIG. 1 is a free caster, and the basic structure is the same as that of an existing rotary caster. As shown in FIG. 2, between the two side walls 8a and 8b of the downward U-shaped caster frame 8. A wheel 9 is rotatably attached to the wheel. The wheel 9 passes the axle 12 through a bearing 11 (FIG. 3) attached to the shaft hole 10, and a cylindrical spacer 13 (FIG. 2) is covered on both ends of the axle 12 in the axial direction as shown in FIG. Is prevented from laterally moving in the axial direction of the axle 12.

  As shown in FIG. 3, the caster 6 is attached to a caster substrate 14 by a rotary bearing 15 so as to be rotatable 360 degrees in the horizontal direction. The rotary bearing 15 includes a caulking pipe 16, a ball 18, a receiving plate 19, and a ball 21, which is similar to the rotary bearing of an existing universal caster, and is opened at the center of the upper plate 8 c of the caster frame 8 (FIG. 2). The caulking pipe 16 (FIG. 3) is inserted into the through-hole 13 (FIG. 2), and a number of steel balls 18 disposed in the ring-shaped upward receiving grooves 17 formed at the lower end of the caulking pipe 16 are provided. A number of steel balls 21 are arranged in a ring-shaped upward receiving groove 20 formed on the outer peripheral edge of the receiving plate 19 that is brought into contact with the inner surface of the upper plate 8c and is fitted to the outer periphery of the caulking pipe 16, The caster frame 8 is placed on the caster substrate 14 with the ball 21 sandwiched between the receiving plate 19 and the caster substrate 14 fitted to the outer periphery of the caulking pipe 16. There a rotatable 360 degrees direction. The caulking pipe 16 has its upper end portion 22 (FIG. 2) folded back and caulked so that the receiving plate 19 and the caster substrate 14 do not come out of the caulking pipe 16. The rotary bearing 15 may have another structure. In FIG. 1, the caster substrate 14 is fixed to the bottom surface of the pedestal 5 by welding, and the casters 8 can be rotated 360 degrees horizontally under the pedestal 5.

(pedestal)
The pedestal 5 shown in FIG. 1 is made of metal, and as shown in FIG. 3, the pedestal substrate 5a has an upward U-shape with upward side walls 5b and 5c on both sides in the width direction. A circular through hole 5d (FIG. 2) is opened, a shaft insertion hole 5d (FIG. 3) is opened at the center of both side walls 5b and 5c, and the upper ends of the side walls 5b and 5c are connected to each other as shown in FIG. 4 (FIG. 3) is fixed to the bottom by welding.

(Connecting plate)
The connecting plate 4 shown in FIG. 1 is a rectangular flat plate, but may have other shapes and sizes such as a polygon and a circle as long as the connecting plate 4 can be attached to the bottom surface of the vehicle body B (FIG. 1) of the carriage A. The connecting plate 4 is made of metal, and can be attached and fixed to the bottom surface of the vehicle body B with bolts and nuts, screws, welding, and other various fixing means.

(Brake device)
The brake (braking device) 7 of the universal caster 6 includes two brake shoes 23 (FIGS. 2 and 4) and a brake drum 24 (FIG. 2, FIG. 2) in which the outer peripheral surfaces of the two opened brake shoes 23 are in contact (pressure contact). 5 and 6).

  The brake shoe 23 (FIGS. 3 and 4) is approximately half the radius smaller than the inner radius of the cylindrical brake drum 24 (FIGS. 2 and 5) provided on the side surface of the frame 9a of the wheel 9 (FIG. 2). It has a circular ring shape (horse-shoe shape), and two brake shoes 23 are arranged in a substantially ring shape inside one side wall 8b (FIGS. 2 and 4) of the caster frame 8, and the circumferential lower ends of both brake shoes 23 A support shaft 25 (FIG. 4) is disposed therebetween, and a shoe operating tool 26 (FIGS. 2 and 4) is disposed between circumferential upper ends.

  A screw shaft (FIG. 2) is used as the support shaft 25, and the screw shaft (support shaft) 25 is inserted from the outside of the side wall 8b through a washer 27 and passes through the side wall 8b to the inside. A nut 28 is screwed onto the tip end side of the protruding screw shaft 25 from the inside of the side wall 8b and is fixed to the side wall 8b.

  As shown in FIG. 2, the shoe operating tool 26 has a cylindrical threaded shaft 26b on the outer side of the circular collar 26a, a longitudinally long bar (eccentric cam portion) 26c on the inner side of the collar 26a, and the cylindrical threaded shaft 26b. As shown in FIG. 3, it is inserted into the side wall 8b from the inside and is rotatably attached to the side wall 8b. As shown in FIG. 2, the cylindrical screw shaft 26b is attached to the side wall 8b by a cylindrical spacer 32 (FIG. 2) in which a set screw 29 is disposed from the outside of the arm 31 through the washer 30 to the outside of the side wall 8b. 3) and inserted into the cylindrical screw shaft 26b (FIG. 2) by rotating the set screw 29 protruding inside the side wall 8b into the cylindrical screw shaft 26b (FIG. 2). It is installed freely.

  The two brake shoes 23 are arranged opposite to each other as shown in FIGS. 4A and 4B, and are drawn between the two brake shoes 23 by being pulled toward each other by two springs 33. The support shaft 25 and the shoe operating tool 26 are sandwiched. The brake shoe 23 is disposed inside the brake drum 24 (FIG. 2).

  The shoe operating tool 26 is normally in a vertical state as shown in FIG. 4A, and the eccentric cam portion 26c is also vertical. However, when the arm 31 (FIG. 2) rotates, the eccentric cam portion 26c is shown in FIG. Rotating from the vertical position of a) to the inclined position of FIG. 4B, the two brake shoes 23 are spread outward, the diameter of the ring formed by both brake shoes 23 is expanded, and the brake shoes 23 The outer peripheral surface is pressed against the inner peripheral surface of the cylindrical brake drum 24 to brake the rotation of the brake drum 24 so that the wheel 9 to which the brake drum 24 is attached is braked (the wheel is braked). It is. When the shoe operating tool 26 returns to the vertical state as shown in FIG. 4A, the outer peripheral surface of the brake shoe 23 is separated from the inner peripheral surface of the cylindrical brake drum 24, and the rotational braking of the brake drum 24 is released. The braking of the wheel 9 to which the brake drum 24 is attached (the brake applied to the wheel) is released.

  The brake drum 24 (FIG. 2) can be the same as the existing one or a new one. The brake drum 24 shown in FIG. 2 has a cylindrical shape that can accommodate the brake shoe 23 shown in FIG. 4, and is fixed to the side surface of the wheel 9a (FIG. 2) of the wheel 9 by welding. The brake drum 24 can be prepared in various sizes according to the size of the brake shoe 23 and the wheel 9 used.

(Operation section)
The shoe operating tool 26 is activated by the operation of the arm 31 as described above. The arm 31 is activated when the drive mechanism is activated by the operation of the operation unit 34 (FIG. 3).

  The operation unit 34 includes a drive shaft 3 (FIGS. 1, 3, and 5) and a handle (a handle that can be manually operated, a foot pedal, or the like) that is projected from the drive shaft 3 in a direction orthogonal to the axial direction. The operation unit 34 is disposed at a position (outside or above the loading platform B of the carriage A) where an operator who pushes the handle H (FIG. 1) of the carriage A (FIG. 1) can operate the manual operation or the stepping operation. . The operation unit 34 can be rotated from the vertical position of FIGS. 1 and 5 in the direction of the arrow X in FIGS. 1 and 6, and the drive shaft 3 is rotated in the same direction by the rotation.

  The drive shaft 3 (FIG. 2) is a metal round bar. As shown in FIG. 3, the shaft insertion hole 5e (opened at the center of both side walls 5b, 5c of the upward U-shaped base 5 is provided. In FIG. 2), it is arranged to rotate freely. An eccentric cam (pushing cam) 35 (FIGS. 3 and 5) is provided at the axial center of the drive shaft 3. When the eccentric cam 35 is rotated by rotating the drive shaft 3 by a handle operation, the eccentric cam 35 is rotated. The eccentric protrusion 36 (FIGS. 2 and 5) of the (pushing cam) 35 rotates from the lateral state in FIG. 5 to the obliquely downward state in FIG. 2, 3, and 5) are pushed down. A metal round bar is suitable for both the drive shaft 3 and the operation unit 34. The eccentric cam 35 is disposed at the center of the through hole 13 (FIG. 1) opened at the center of the upper plate 8c of the caster frame 8 (FIG. 2).

(Drive mechanism)
The drive mechanism includes the piston 37 (FIGS. 1 and 5) provided between the operation portion 34 and the shoe operating tool 26 (FIG. 4), and as shown in FIGS. The arm 31 (FIGS. 2 and 5) is provided.

  The piston 37 includes a cylindrical piston cover 37a (FIG. 2) having a downward opening and a piston rod 37b. The piston cover 37a is disposed at the center of the through hole 13 (FIG. 2) opened at the center of the upper plate 8c of the caster frame 8 (FIG. 2). Both the piston cover 37a and the eccentric cam 35 are disposed at the center of the through hole 13 (FIG. 1) opened at the center of the upper plate 8c of the caster frame 8 (FIG. 2), so that the caster frame 8 ( 2), the piston cover 37a and the eccentric cam 35 are always located at the center of the through hole 13 (FIG. 2), and the eccentric cam 35 securely secures the caster frame 8 (FIG. 2). Can be pushed down.

  In the piston rod 37b, a support pipe 37c and a slide pipe 37d longer than the support pipe 37c are connected in a substantially T shape as shown in FIG. The support pipe 37c is disposed in the piston cover 37a and is rotatably supported on the piston cover 37a as shown in FIG. 5 by support pins 37f (FIG. 2) inserted into the support pipe 37c from the outside of the piston cover 37a. Has been. The slide pipe 37d (FIG. 3) protrudes out of the piston cover 37a as shown in FIG. 5, and is arranged between both side walls 8a and 8b of the caster frame 8 as shown in FIG. In the slide pipe 37d, the support shaft 39 inserted into the curved elongated hole 38 (FIG. 2) of the side wall 8b from the outside of the side wall 8b is inserted into the slide pipe 37d, and the support shaft 39 is inserted into the side wall 8a from the opposite side of the slide pipe 37d. Projecting to the outside of the curved elongated hole 38, a washer 40 is put on the projecting end of the support shaft 39 from the outside of the side wall 8a, and a nut 41 is screwed to prevent it from coming off between the side walls 8a and 8b. It is supported freely.

  When the piston cover 37a is pushed down by the eccentric protrusion 36 (FIG. 5) of the eccentric cam 35 of the operation shaft 3, the slide pipe 37d and the support shaft 39 are curved elongated holes 38 (FIG. 3) on both side walls 8a and 8b. The arm 31 (FIG. 2) is tilted in the sliding direction by this slide (from the position of FIG. 5 to the position of FIG. 6). The lower end of the arm 31 is pulled by the return spring 42 (FIG. 3), and the arm 31 lowered as shown in FIG. 6 is pulled back as shown in FIG.

  With this configuration, when the arm 31 slides and the eccentric cam portion 26c rotates from the state shown in FIG. 4A to the state shown in FIG. 4B, the upper end portions in the circumferential direction of the two brake shoes 23 are on the outer sides. The outer peripheral surfaces of the two brake shoes 23 are pressed against the inner peripheral surface of the cylindrical brake drum 24 (FIG. 2), and the rotation of the brake drum 24 is braked. In this case, since the brake drum 24 is fixed to the wheel side surface 9a (FIG. 3) of the wheel 9, the rotation of the wheel 9 is braked and stopped. When the eccentric cam portion 26c returns from the state shown in FIG. 4B to the state shown in FIG. 4A by the operation release or switching operation of the operation shaft 3, the two brake shoes 23 are released along the circumferential upper ends. Thus, the outer peripheral surfaces of the two brake shoes 23 are separated from the inner peripheral surface of the cylindrical brake drum 24 (FIG. 2), the restriction of rotation of the brake drum 24 is released, and the rotational braking of the wheel 9 is released. 9 can freely rotate.

(Operation of brake device and caster with brake device)
The caster with brake 1 having the above structure operates as follows.
1. When the handle (operation unit) 34 in FIG. 5 is operated and tilted in the direction of the arrow X in FIG. 6 from the state in FIG. 5 (normal state), the operation shaft 3 rotates around its central axis. With the rotation, the eccentric cam 35 rotates in the same direction.
2. The rotated eccentric cam 35 pushes down the piston cover 37a of the piston 37 and moves it downward, and along with that movement, the slide pipe 37d and the support shaft 39 move along the curved elongated holes 38 of the side walls 8a and 8b of the caster frame 8. Move down.
3. By the movement of the slide pipe 37d, the arm 31 attached to the end of the slide pipe 37d is tilted from the position shown in FIG. 5 to the position shown in FIG.
4). The eccentric cam portion 26c (FIG. 2) tilts (rotates) from the state of FIG. 4 (a) to the state of FIG. 4 (b) due to the tilt of the arm 31, so that the distance between the brake shoes 23 increases. The outer peripheral surface of 23 comes into contact with the inner peripheral surface of the brake drum 24 and the rotation of the brake shoe 23 is braked, and the rotation of the wheel is braked (the brake is applied).
5). When the operation of the handle (operating part) 34 in FIG. 5 is released, the operating shaft 3, the eccentric cam 35, and the arm 31 perform the reverse operation thereafter, and the eccentric cam part 26c (FIG. 2) is in FIG. The state returns to the state shown in FIG. 4A from the state shown in FIG. As a result of this return, the outer peripheral surface of the brake shoe 23 that is in contact with the inner peripheral surface of the brake drum 24 is separated from the inner peripheral surface of the brake drum 24 so that braking of the brake drum 24 is released and braking of the wheels 9 is also released. (The brake is released).

(Caster with lock mechanism)
The caster with a brake may be provided with a lock mechanism (not shown) that can maintain the braking state (the brake is applied) of the operation unit 34. Even if the operation of the operation unit 34 is released by setting the lock mechanism to the locked state, the braking state is maintained (braking is not released). An existing operation lock can be used. Locking ensures the freedom of the operator's limbs.

(Caster unit)
A caster unit 2 shown in FIG. 1 has two casters 1 with brakes arranged side by side as an example, and the drive shaft 3 of both casters 1 with brakes is shared by one. The caster unit 2 can also connect three or more casters 1 with brakes. In the case of the caster unit 2, the drive shaft 3 is rotated by operating the operation unit 34 attached to one place of the drive shaft 3, and all casters with brakes sharing the shaft are braked. The brake is released (the brake is released) when the operation of the operation unit 34 is released.

  In FIG. 1, two casters with brakes are arranged side by side and connected. However, in some cases, two casters with brakes can be arranged at the front and back to be connected.

(Embodiment of trolley)
In the cart of the present invention, the caster with brake 1 is attached as a front wheel and a rear wheel in the vicinity of the four corners of the rear surface of the vehicle body B. Select the mounting position and number of mounting as required. The cart A in FIG. 1 is provided with a handle H for hand pushing on the vehicle body B, but may be a cart without the handle H. Moreover, a cart with a basket (cart) or a cart with another structure and method may be used.

(Drive shaft slide)
In the above description, the operating shaft 3 is a rotary type. However, the operating shaft 3 of the present invention is slidable in the axial direction as shown in FIGS. When the operating shaft 3 is slid in the right direction in FIGS. 7A and 7B, the protrusion 50 can contact the piston cover 37a of the piston 37 and push it down.

  In this invention, it can also be set as the drive mechanism of structures other than an operating shaft and piston 37. FIG. For example, when a foot pedal is depressed, a drive body that replaces the operation shaft is actuated, and the piston 37 or a movable body that replaces the piston 37 is pushed downward by the actuation, and the arm 31 can be actuated.

  In the present invention, an elevator having another structure is used instead of the arm 31, and the shoe operating tool 26 is actuated from the vertical position to a position inclined laterally by raising and lowering the elevator 31. Can be opened and closed.

  The caster with brake and the caster unit according to the present invention can be attached to a mobile vehicle such as a shopping cart, a wheelchair or a baby carriage.

DESCRIPTION OF SYMBOLS 1 Caster with brake 2 Caster unit 3 Operation shaft 4 Connection material 5 Base 5a Base board 5b, 5c Base side wall 5d Base board shaft insertion hole 5e Base side wall shaft insertion hole 6 Caster 7 Brake 8 Caster frame 8a, 8b Side wall of frame 8c Upper plate of caster frame 9 Wheel 9a Wheel frame 10 Wheel shaft hole 11 Bearing 12 Axle 13 Spacer 14 Caster board 15 Rotating bearing 16 Caulking pipe 17 Upward receiving groove 18, 21 Steel ball 19 Receiving plate 20 Upward receiving groove 22 Upper end portion of caulking pipe 23 Brake shoe 24 Brake drum 25 Support shaft 26 Shoe operating tool 26a ２６ 26b Cylindrical screw shaft 26c Long rectangular bar (eccentric cam portion)
27 Washer 28 Nut 29 Set screw 30 Washer 31 Arm 32 Spacer 33 Spring 34 Operation part 35 Eccentric cam part 36 Eccentric protrusion part 37 Piston 37a Piston cover 37b Piston rod 37c Support pipe 37d Slide pipe 37f Support pin 38 Curved elongated hole 39 Support shaft 40 Washer 41 Nut 42 Return spring 50 Projection A Bogie B Bogie body H Bogie handle

Claims (9)

  Brake casters with brakes that brake and release the rotation of the wheels of the universal caster, and brake drums and brake shoes that can be pressed and released from each other, shoe operating tools that can open and close the brake shoes, and shoe operating tools The brake drum and the brake shoe, one of which is provided on the wheel, the other is provided on the side thereof, and the shoe operating tool is provided on the side of the brake shoe. The drive mechanism is provided between the operation unit and the shoe operation tool, and transmits the operation of the operation unit to the shoe operation tool to operate the shoe operation tool. The shoe operation tool is operated by operating the operation unit. When the drive mechanism operates, the brake shoe is brought into pressure contact with the brake drum to brake the wheel, and when the operation portion is released, the pressure contact is made. Brake casters, characterized in that as the brake is released is released.   The caster with a brake according to claim 1, wherein the drive mechanism is moved up and down by operation of the operation unit, and the shoe operation tool is operated by following the lifting and lowering movement of the lifting tool to press the brake shoe against the brake drum. A caster with a brake, characterized in that it is equipped with a link mechanism.   The caster with a brake according to claim 2, wherein the lifting tool is disposed on the rotation center axis of the free caster so that the position of the lifting tool is not shifted from the rotation center axis even if the free caster rotates. Caster with.   The caster with a brake according to any one of claims 1 to 3, wherein the drive mechanism is an operation shaft, and the operation shaft is attached to the pedestal so as to be rotatable around the axis or slidable in the axial direction. A caster with a brake.   The caster with a brake according to any one of claims 1 to 4, further comprising a pedestal to which a caster frame is attached, and an operation unit disposed in the pedestal.   In a caster unit having two or more casters, two or more of the brake casters according to any one of claims 1 to 5 are arranged laterally or front and rear at intervals, and a drive shaft of the brake casters is provided. A caster unit with a brake, which is common and the drive shaft is driven by operation of one operation unit.   The caster unit with a brake according to claim 6, wherein the base of the caster with a brake is connected by a single connecting member.   In a cart provided with a caster on a vehicle body capable of carrying a load, the caster with a brake according to any one of claims 1 to 5 or the caster unit according to claim 6 or 7 is provided under the vehicle body. A cart with casters, characterized by being mounted rotatably.   9. The cart with casters according to claim 8, wherein a caster with a brake or a pedestal of a caster unit is attached to a vehicle body, and an operation portion is arranged in a space of the pedestal.

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