JPS63203402A - Castor with fixed stand - Google Patents

Abstract

PURPOSE:To make a wheel part unslidable and thereby lifting motion of a fixed stand easily performable, by depressing a supporting leg part with leverage of each of upper and lower levers, and moving a ground plane of a shoe part in the part lower than the wheel part of a castor. CONSTITUTION:In this castor 1, a fixed stand is solidly attached to a support yoke 4. In this case, the fixed stand is constituted of a casing 5 set up in a position to be held between rear side central parts in symmetrical wheel parts 2, a support leg part 6 screwed in a shoe part 7 and each of upper and lower levers 9 and 8 making this support leg part 6 move up and down. With this constitution, when the fixed stand is used, these upper and lower levers 9 and 8 are moved in cross-form, and a pin P1 at a tip of the lower lever 8 is slidden in the lower part, while a setting surface of the support leg part 6 or the shoe part 7 is moved in a lower part than the lowermost position of the wheel part 2. and, respective pins 1-P3 are linearly arranged whereby these upper and lower levers 9 and 8 are locked.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an improvement in a caster equipped with a fixed stand that moves up and down from a standby position above the ground contact position of the wheels of the caster to a fixed position below.

[Conventional technology]

Conventionally, as this type of caster, for example,
Mobile stabilizer for equipment related to No. 7661 and Utility Model Application No. 60-3
A swivel vehicle with an installation base according to No. 6303 is known,
In order to adjust the height of the fixed stand, these are rotated by threaded screws to move the ground surface up and down, thereby performing height articulation. Therefore, when it is necessary to move up and down a large amount, the operation is time-consuming and complicated.

[Problems to be solved by the invention]

This invention was devised as a result of intensive research in order to solve the above-mentioned drawbacks, and its main problem is to raise and lower the fixed stand with a single touch, and to make fine adjustments by rotating the shoe part as necessary. To provide a caster with a fixed stand that has excellent operability.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a caster equipped with a fixed stand that moves upward and downward from the ground contact position of the wheel portion of the caster, in which (a) the fixed stand is integrated with the support yoke; A cylindrical casing extending vertically is provided. (b) A supporting leg portion biased in an upward direction is built into the casing. (C) A shoe is attached to the lower end of the support leg so as to be adjustable in the height direction. (d) The base end is pivotally connected to the supporting leg portion using a thrust pin, and a lower lever is attached to the pivot point so that the pivot point is movable. (e) A long hole is provided in the casing to allow the driving pin to slide in the height direction within a predetermined range. (f) An upper lever □ whose base end is pivotally connected above the casing, the pivot point is fixed, the midway part is pivotally connected to the midway part of the lower lever, and the tip extends in the direction away from the lower lever. We are taking technical measures to install the .

[For use]

Due to the pushing action of the upper and lower levers, the pivot point at the tip of the lower lever is displaced downward by thrust, pushing the support leg downward by a predetermined stroke against the biasing force, and the contact surface of the shoe section is connected to the caster wheel. move it downward beyond the lowest position of the section. As a result, only the shoe portion comes into contact with the floor surface, so the sliding function of the caster does not work, and the main body to which the caster is attached can be fixed. At this time, the height can be finely adjusted by rotating the shoe part and moving the shrimp forward and backward in the axial direction of the supporting leg part. Next, when the upper lever and the lower lever are unlocked, the supporting leg moves upward by a predetermined stroke due to the biasing force, returning the □ ground contact surface of the shoe to the upper position beyond the lowest position of the caster wheel. . As a result, only the wheel portions are in contact with the floor surface, so that the sliding function of the casters can be increased to 1ej.

【Example】

Below, preferred embodiments of the caster with fixed stand according to the present invention will be described based on the drawings. The casters l with fixed stands shown in Figs. 1 and 4 are
It consists of a fixed stand 3 integrally attached to a support yoke 4 of a twin-wheeled caster. That is, the fixed stand includes a casing 5' which is integrally connected to the axle bearing of the wheel part 2.2 at a position sandwiched between the rear centers of the left and right wheel parts 2, 2, and a supporting leg part 6 on which the shoe part 7 is attached. , it has a lower lever 8 and an upper lever 9 that move the support leg up and down. Here, the casing 5 has a cylindrical shape with an open upper square and a bottom hole 5b through which the tip of the support leg 6 is inserted at the lower part. The support leg 6 is made of a pin having a threaded part 61 set to a small diameter from the head 6a and has a thread carved on the outer periphery, and is inserted into the hollow of the casing 5 with a spring S externally fitted to the threaded part. It is built in and can be freely retracted from the bottom hole 5b. Next, the shoe part 7 has a threaded groove 71 passing through it vertically, and is engaged with the threaded part 61 of the supporting leg part 6. The tip of the lower lever 8 is pivotally attached to a through hole 62 formed in the head of the support leg 6 and passing through in the lateral direction via a driving pin P1. Both ends of the driving pin P1 are restrained by long holes 5a formed on both sides of the casing 5, and are configured to slide up and down with a predetermined stroke. Further, the tip of the upper lever 9 is pivotally attached to a receiver portion 51 having a hole formed above the casing 5 and passing through in the lateral direction by a fixing pin P3. The middle part of the upper lever 9 overlaps the middle part of the lower lever 8 from the outside, and a pair of movable pins P2. They are pivotally connected at P2, and their respective tips extend in the direction of separation. In this embodiment, the upper lever 9 and the lower lever 8 each have a shape in which a pair of abbreviated plates are separated and integrated with a connecting plate placed laterally in the width direction on the distal end side. A plurality of anti-slip protrusions 81 and 91 are respectively formed on the upper part of the plate to improve operability. Attachment screws 10 for fixing to the body to which the caster is attached are fitted from above into the upper part of the casing 5 in which the supporting legs 6 are incorporated, and are fixed thereto. In this embodiment, the mounting screw 10 has a threaded portion on the upper side, and the lower portion thereof is inserted into the casing 5 through a base portion in the middle. A groove 11 is annularly bored at the lower end of the groove 1.
1 has a spring washer 12 fitted onto it, and a mounting screw 10
is restrained within the casing 5. In the illustrated example, the wheel portion 2 is composed of a pair of left and right wheels, and is arranged on both the left and right sides of the casing 5. With this structure, when using the fixed stand, the upper lever 9 and the lower lever 8 are moved in an intersecting manner from the solid line position to the dashed line position in the figure, and the tip of the lower lever is pushed by the screw action. The pin P1 is slid downward by the thrust, and the contact surfaces of the supporting legs 6 to shoe parts 7 are displaced downward beyond the lowest position of the wheel part 2 of the caster. Then, the fixed pin P3, the movable pin P2, and the driving pin PI are aligned in a straight line, or the movable pin P2 exceeds this state and enters the toggle state in the outer (right side in FIG. 1) position, so that the upper lever 9 and the lower lever 8 are locked. As a result, the wheel portion 2 of the caster does not slide, and the main body to be mounted is supported at a fixed position by the fixed stand. Next, to release the fixed state, move the lower lever 8 and the upper lever 9 in the opposite direction, and the movable pin P2 will move from the straight line formed by the fixed pin P3 and the driving pin P1 to the inside (the first
The locked state is released by the displacement to the left side in the figure, and the repulsive force of the spring S causes the support legs 6 to 7 to be displaced from the dashed-dotted line position to the solid line position, allowing the supporting legs 6 to 7 to return to their upper positions. This allows the wheel portion 2 to freely slide on the floor surface. The caster 1 with a fixed stand shown in FIG. 5 has a single wheel portion 2, and in this case, the edge of the fixed stand is placed behind the wheel. Since the other configurations are the same as those of the previous embodiment, the same configurations are denoted by the same reference numerals and the explanation thereof will be omitted.

【Effect of the invention】

Since the present invention has the above configuration, it is possible to vertically move the fixed stand integrated with the caster by a large stroke with a single touch, and it is advantageous that the raising and lowering operation of the fixed stand can be extremely simplified. In particular, if the main body to which the casters are attached is a table or stage that has a folding structure,
When the main body to which it is attached is folded, its pillars extend, and the surface on which the casters and stand are attached becomes a slope that gradually rises in the direction of sliding, so that the raised position of the fixed stand is far greater than the ground position of the caster wheels. If the height is not high enough, the shoes of the fixed stand may rub against the floor surface when folded, hindering the sliding of the casters.However, if the casters with the fixed stand of this invention are used, they will always return to the predetermined raised position. Because
This is suitable because it does not impair the sliding function of the casters. In addition, the structure of the fixed stand is simple, and there is no need to make it large, so it does not get in the way, and especially when used for twin-wheeled casters, it can be placed between the wheel parts, allowing for further miniaturization. At the same time, it is possible to minimize the difference between the caster and the ground surface during the folding process, which is advantageous.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a caster with a fixed stand showing a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is a plan view, FIG. 4 is a front view, and FIG. FIG. 3 is a side sectional view showing a different embodiment. 1... Caster with fixed stand 2... Wheel part 3... Fixed stand 4... Support yoke 5... Casing 6... Support leg part 7... Shoe part 8... Lower lever 9 ... Upper lever 10 ... Mounting screw Pl ... Drive pin Fig. 1 Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] (1) A caster equipped with a fixed stand that moves up and down from the ground contact position of the wheel portion of the caster, comprising: a cylindrical casing in which the fixed stand extends vertically integrally with a support yoke; and the casing. a support leg built into the support leg and biased in the upward direction; a shoe screwed onto the lower end of the support leg so as to be adjustable in the height direction; a lower lever with which the pivot point is movable; a long hole provided in the casing that allows the driving pin to slide in the height direction within a predetermined range; and a base end pivotably mounted above the casing. A caster with a fixed stand, comprising: an upper lever whose pivot point is fixed, whose midway part is pivotally connected to the midway part of the lower lever, and whose tip is bent in a direction away from the lower lever.