JPH04122201U - Casters with braking mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a caster with a simple braking mechanism that does not require the operation of a lever or the like. [Configuration] When the downward load on the mounting rod (13) is small, the brake part (19) at the tip of the brake body (17) and the wheel
(7) When the engagement force between the annular projections (6) is large and the downward load on the mounting rod (13) is large,
Brake part (19) at the tip of brake body (17) and annular protrusion (6) on wheel (7)
It is characterized by the fact that the engagement force between them is small or completely absent.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is used by being attached to the lower end of furniture such as chairs, as in the past. When the load applied to the wheels is large, the braking force on the wheels decreases or is completely applied. Casters with a structure that increases braking force when the load is small. - related.

0002

[Conventional technology]

Furniture that changes the load on it, such as a chair on which a person sits Casters attached to the lower end of etc., which have a braking mechanism added to them, are This is already known, for example, as disclosed in Japanese Utility Model Publication No. 55-21845. This is a caster - By operating the lever protruding from the outside of the cover with your finger, you can release the brake pin. It engages with a recess provided in the wheel to apply braking.

0003

[Problem that the idea aims to solve]

However, this is quite troublesome as it requires operation each time the brake is applied. be.

0004 As a caster that solves this problem, as shown in Figure 7, a mounting rod is installed. a is pivotally attached to the shaft support b so that it can slide up and down, and one end linked to the mounting rod a is attached to the upper It is elastically biased toward one end by a spring c, and at the other end there is a braking section e against the rolling surface of the wheel d. There is a braking body f which has a braking body f which is pivotally attached to a shaft support b through a pin g at its center. . However, this caster has many parts, and the braking body f is centered at the center of the caster. The structure is complicated, such as having to be attached to the shaft support b via the pin g, and in order to reduce costs. There are problems that hinder the development of Also, the brake part e of the brake body f engages with the rolling surface of the wheel d. Because of this, the rolling surfaces may be damaged over a long period of time, which may impede the smooth rolling of the wheels. There are also problems.

[0005] This invention was devised to solve these problems, and the operation of levers, etc. Aimed at casters with a simple braking mechanism that does not require .

[0006]

[Means to solve the problem]

In order to achieve such an objective, in the present invention, both sides of the bottom wall 2 having a required width are provided. An axle 5 is provided protruding from a pair of axes on both sides of a shaft support 1 on which opposing walls 3, 3 are erected, Moreover, a wheel 7 having an annular protrusion 6 formed on the outer periphery of the axle 5 side is arranged, and the axle 5 is From the outside of both opposing walls 3, 3 to the inside, the tip side is inserted into the shaft hole provided at the lower center of the opposing wall 3. The upper half of the pair of wheels 7, 7 is attached to the shaft support 1, and the upper half of the pair of wheels 7, 7 is removed from the shaft A covering cover 9 is attached, and a cover 9 is attached between both opposing walls 3, 3 of the shaft support 1. The rod 13 has its upper mounting portion 14 passed through the cover 9 and protrudes upward to attach the upper and lower shafts. It is designed to be able to ride, and is also elastically biased upward by a spring attached to this mounting rod 13. Also, one end of the brake body 17 is attached to the mounting rod 13 between the opposing walls 3, 3, and the brake body 17 is The other end of the movable body 17 is made into a free end and directed onto the axle 5, and further extended to both sides to form the shaft support 1. The inner circumferential surface of the annular protrusion 6 of the wheel 7 is made to pass through both opposing walls 3, 3 of the Forms a braking part 19 that can be engaged from the opposite direction, and applies a downward load to the mounting rod 13. is small, the engagement force between the brake part 19 at the tip of the brake body 17 and the annular protrusion 6 of the wheel 7 is large and the downward load on the mounting rod 13 is large, the braking The engagement force between the brake part 19 at the tip of the body 17 and the annular protrusion 6 of the wheel 7 is small or not present at all. A caster with a braking mechanism characterized by:

[0007]

[Effect]

Therefore, as with conventional casters, the mounting part 14 on the upper part of the mounting rod 13 is For example, a required number of such devices are attached to the lower end of a chair or the like through the device.

[0008]

【Example】

The details of the caster according to the present invention will be further explained based on the attached FIGS. 1 to 4. 1 is a pair of opposing walls on both sides of a bottom wall 2 having the required width by bending a metal plate into a concave cross section. This is a shaft support with 3 and 3 erected. Then, almost at the bottom of the center of both opposing walls 3 and 3, A cylindrical axle is mounted at the center of a cylindrical bearing 4 that protrudes outward from the periphery of a shaft hole provided in the an axle of a wheel 7 having a protruding portion 5 and an annular protrusion 6 formed on the outer periphery of the axle 5 side; 5 is inserted from the outside of both opposing walls 3, 3 with the tip side protruding inward, and this shaft support A pair of wheels 7, 7 are rotatably supported on both sides of 1. 8 is both opposing walls 3, 3 Both ends are inserted into the cylindrical axles 5, 5 facing each other between the axles 5, 5, and installed in a suspended state between the axles 5, 5. It is a metal shaft pin attached. 9 is a pair of wheels 7 disposed on the upper side of the shaft support 1; This is a semi-cylindrical cover made of synthetic resin that covers the upper half of the 7. This is the inside Both opposing walls 3, 3 are inserted into locking holes 11 provided in a mounting plate 10 protruding at intervals in the width direction of the It is attached to the shaft support 1 by locking the locking protrusions 12, 12 protruding from the outer surface of the shaft. Reference numeral 13 denotes a mounting part 14 formed in the threaded part at the upper part of the shaft support 1 on one side between the two opposing walls 3, 3. is a mounting rod that penetrates the cover 9 and protrudes upward; A large diameter portion 15 provided on the outer periphery of the upper portion is locked to the upper portion of the cover 9, and this lower end portion A locking protrusion 16 provided on the shaft support 1 is locked and attached to the lower surface of the bottom wall 2 of the shaft support 1, and the large diameter portion 15 and the locking protrusion 16 is larger than the distance between the top of the cover 9 and the lower surface of the bottom wall 2 of the shaft support 1. Therefore, it is slidable in the axial direction, that is, in the vertical direction.

[0009] 17 is a brake body, one end of which is inserted through and attached to the mounting rod 13, and the other end is a free end. and point it above the axle 5, then point it slightly upwards, and extend it from this tip to both sides. Insertion holes 18, 18 provided in both opposing walls 3, 3 of the shaft support 1 and the mounting plate 10 of the cover 9. The insertion hole provided in the same manner is inserted into the inner peripheral surface of the annular protrusion 6 of the wheel 7 so as to be able to move up and down. A braking portion 19 that can be engaged from below is formed.

0010 20 is a step-shaped stopper provided almost in the center of the mounting rod 13, and this stops the braking body 17. The braking body 17 can be moved up and down together with the mounting rod 13 by determining the position of It looks like this. This stopper 20 is formed by inserting a pin into the mounting rod 13. Good too.

[0011] 21 is fitted onto the mounting rod 13 between the upper surface of the bottom wall 2 of the shaft support 1 and the lower surface of one end of the brake body 17. A coil spring is inserted between the mounting rod 13 and the brake body 17 through the washer 22. It is elastically biased in the opposite direction. When the mounting rod 13 is moving upward, the spring force The brake part 19 at the tip of the brake body 17 engages and presses against the inner peripheral surface of the annular protrusion 6 of the wheel 7. It is supposed to be done.

0012 In addition, the locking protrusion 16 of the mounting rod 13 is provided with a C-shaped washer on the mounting rod 13. It is inserted into the groove, but this is done by caulking the end of the mounting rod 13 to make it larger in diameter. Alternatively, it can also be formed by passing a stopper pin through the mounting rod 13.

[0013] Furthermore, as shown in FIG. 5, an engaging protrusion 23 is provided on the inner peripheral surface of the annular protrusion 6 of the wheel 7, It is also possible to engage the brake portion 19 of the brake body 17 therewith.

[0014] Also, instead of the coil spring 21, a leaf spring 24 bent into a U-shape as shown in Fig. 6 can be used. In this embodiment, both ends of the leaf spring 24 are inserted through the mounting rod 13. It is installed.

[0015] Therefore, as with conventional casters, the mounting part 14 on the upper part of the mounting rod 13 is For example, the required number of cables are attached to the lower end of a chair or the like through the cable.

[0016] In this way, when no one is sitting on the chair, multiple casters can be used. The elasticity of the spring overcomes the weight of the chair and lifts the mounting rod 13 upward. Therefore, one end of the brake body 17 on the mounting rod 13 side is also lifted in the same way, and the brake body 17 The brake part 19 at the other end moves upward, and therefore, as shown in FIG. is engaged with the inner circumferential surface of the annular protrusion 6 of the wheel 7 from below and is pressed against it, and the engagement between the two is The resultant force brakes the rolling of the wheels 7, making it impossible for the chair to move freely. And people When an unoccupied chair is struck by a walking person or other object, the chair will most likely collapse. Because it is immovable, when the person who was standing sits down again, the chair has moved. It is possible to prevent the chair from falling or colliding with other objects.

[0017] Also, when a person sits on the chair, the weight of the person resists the elasticity of the spring and connects the mounting rod 13. Since the braking body 17 is also moved downward, the braking part 19 at the other end of the braking body 17 is moved from the axle 5 of the wheel 7. Once separated, the wheels 7 are free to roll and the chair can be moved. In other words, there is a person in the chair. When the chair is seated, the braking of the wheels 7 by the braking body 17 is released, allowing the chair to move freely. When a person stands up, the wheels 7 are braked, making it impossible for the chair to move. Therefore, the analogy For example, when I lift my hips up from my chair to pick up the phone or take a document, does the brake apply to the wheels 7? Even if your feet hit the chair when you lift your hips, the chair will hardly move. This allows you to sit down safely when you sit down again, and prevents the chair from moving accidentally. Always use the chair safely by preventing falls due to be able to.

[0018] Further, the brake body 17 moves up and down together with the vertical movement of the mounting rod 13, and furthermore, the brake body 17 Since there is no need for a pivot pin etc., the number of parts can be reduced and costs can be reduced. It becomes possible.

[0019]

[Effect of the idea]

The casters according to the present invention as described above are easy to install when used on chairs, etc. As the pad 13 moves up and down, the braking body 17 also moves up and down at the same time. When using a chair, etc., even if the person stands up, it is necessary to make complicated operations such as levers, etc. This prevents the chair from moving unintentionally, and on the other hand, when a person sits down, it automatically moves. A highly safe chair in which the brakes on the wheels 7 are released and the chair can be moved freely. becomes.

[0020] Also, the braking force applied to and released from the wheels 7 is controlled by the mounting rod to which the load is directly applied. 13, the operation is reliable.

[0021] Furthermore, since the structure of the braking body 17 for applying braking force is simple, costs can be increased. It is possible to provide inexpensive casters without raising them.

[0022] In addition, the brake part 19 of the brake body 17 may be directly connected to the rolling surface of the wheel 7. Moreover, there is no problem of long-term damage to the rolling surface and hindrance to the smooth rolling of the wheels 7. It is.

[0023] In addition, sand, dirt, and dust adhering to the rolling surface of the wheels 7 can cause wear and malfunction of various parts. There is little chance of it becoming a cause.

[Brief explanation of drawings]

[Fig. 1] A partially sectional front view showing a caster having a braking mechanism according to the present invention.

[Figure 2] Perspective view showing the shaft support

[Fig. 3] Fig. 4 is a vertical sectional view showing the installation state of the shaft support and cover mounting plate.

[Fig. 4] A vertical cross-sectional view showing a wheel;

FIG. 5 is a partially sectional front view showing the main parts of another axle embodiment;

[Fig. 6] A partially sectional front view showing the main parts of another embodiment.

[Fig. 7] Vertical front view showing a caster with a conventional braking mechanism

[Explanation of symbols]

1 shaft support 2 Bottom wall 3 Opposing wall 4 Bearing 5 Axle 6 Annular protrusion 7 Wheels 8 axis pin 9 Cover 10 Mounting plate 11 Locking hole 12 Locking protrusion 13 Mounting rod 14 Mounting part 15 Large diameter section 16 Locking protrusion 17 Braking body 18 Insertion port 19 Braking part 20 Stopper 21 Coil spring 22 Washer 23 Engagement protrusion 24 Leaf spring

Claims (1)

[Scope of utility model registration request] [Claim 1] An axle (5) is mounted on a pair of axles on both sides of an axle support (1) with opposing walls (3) (3) erected on both sides of a bottom wall (2) having a required width. A wheel (7) is provided that protrudes and has an annular protrusion (6) formed on the outer periphery of the axle (5), and the axle (5) is provided approximately at the bottom of the center of the opposing wall (3). Both opposing walls in the shaft hole (3)
A cover (9) that is rotatably supported with the tip side protruding from the outside to the inside of (3), and that covers the upper half of the pair of wheels (7) (7) on this shaft support (1). is installed, and the shaft support (1)
Between the opposing walls (3) (3), there is a mounting rod (13) whose upper mounting portion (14) passes through the cover (9) and projects upwards so that it can slide up and down. (13) is elastically biased upward by a spring attached to the brake body (13), and one end of the brake body (17) is attached to the mounting rod (13) between the opposing walls (3). ) is made into a free end so that it faces above the axle (5), and further extends to both sides to connect the opposite walls (3) of the axle support (1).
(3) so as to be vertically movable, and the annular protrusion (6) of the wheel (7)
A braking portion (19) that can be engaged from below is formed on the inner circumferential surface of the
When the downward load on the mounting rod (13) is small, the engagement force between the braking part (19) at the tip of the braking body (17) and the annular protrusion (6) of the wheel (7) is large, and the mounting When the downward load on the rod (13) is large, the braking body (17)
A caster having a braking mechanism characterized in that the engagement force between the braking part (19) at the tip and the annular protrusion (6) of the wheel (7) is small or completely eliminated.