JP2001206678A - Jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack usable even at a low gap section by forming the whole height low. SOLUTION: A push-up plate is rotatably journalled on a substrate. A drive source having a rod is provided on the substrate. A push lever pushing-up the push-up plate is pivotally supported on the tip of the rod. A front tilt application section inclining the push lever forward is provided in the advancing direction of the push lever, and the push lever is inclined forward when it is advanced. The push-up plate is pushed up by the rear wheel of the push lever when the rod is extended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a jack.

[0002]

2. Description of the Related Art Conventionally, jacks, particularly jacks for automobiles, pivotally support a push-up plate on a substrate and pivotally support a cam plate on a substrate or the like when the press-up plate is pushed up by a driving source. By pulling or pressing one of the cam plates, for example, a lower portion by a rod reciprocating by a drive source, the cam plate is rotated, and a push-up plate fixed or locked to the upper end thereof is rotated or raised. Was. For this reason, since a cam plate is required, the total height must be equal to or longer than the cam length.

[0003]

However, for example, in the case of a jack for a car, for example, the under-floor dimension of the car is configured to be low, and in a conventional jack, it is more than the ability to limit the height of the cam plate. The limit is that it cannot be used for cars that are lower than a certain level.

[0004]

Therefore, in the present invention, the above-mentioned point of the conventional system using a lever-type cam plate is reformed, and a jack that can be formed with a low overall structure by using no cam plate is provided. In a jack that pivotally supports the push-up plate so as to be able to raise and lower on the substrate, the push-rod is pivotally supported so as to be able to raise and lower on the rod that reciprocates by the drive source. It is characterized in that a front inclination applying portion for applying a front inclination force is provided at a desired position on a push rod, a substrate, or a push-up plate.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a substrate on which a push-up plate 2 is pivotally supported 3 so as to be capable of being raised. The substrate 1 is provided with wheels and the like so as to be movable, and it is free to provide a stopping device such as a wheel stopper. Reference numeral 4 denotes a placing plate provided at the tip of the push-up plate 2. Reference numeral 5 denotes a driving source, which is preferably pivotally supported 6 on the substrate 1, and a hydraulic or pneumatic cylinder is often used. Reference numeral 7 denotes a rod reciprocated by the drive source 5. The drive unit 8 is constituted by the drive source 5 and the rod 7. For this reason, the drive source 5 is pivotally supported on the substrate 1, but the position may be changed and the rod 7 may be pivotally supported on the substrate 1. Further, the drive source 5 operates the rod 7, and when pushing up the push-up plate 2, the rod 7 may be pushed or pulled, and either of them can be selected.

Reference numeral 9 denotes a push rod, the center of which is pivotally supported 10 at the drive unit 8, preferably at the tip of the rod 7. The push rod 9 may be provided with wheels 91 and 92 rotatably at both ends thereof, or a sliding portion may be provided instead of the wheels 91 and 92. The two push rods 9 may be parallel to each other, and may be pivotally supported 94 on both sides of the shaft 93. At this time, the shaft 93 is fixed or pivotally supported 71 on the rod 7. The wheels 91 and 92 may move on the substrate 1, or may move on rails 101 separately provided on the substrate 1.

Reference numeral 11 denotes a forward inclination imparting portion for imparting a forward inclination to the push rod 9. The simplest mechanism is a center point 9 of the push rod 9.
5. For example, it can be configured by forming a center point of a line connecting the axis of the wheel 91 and the wheel 92 and the pivot point 94 vertically apart. In this case, the pushing rod 9
Is advanced by the wheels 91 and 92, but the difference in the point of force causes the rear side of the push rod 9 to be pushed up by the wheel 92. Then, when pressure is applied to the push rod 9 to move forward, the push-up becomes even steeper. For example, in the traveling direction of the wheel 92, the inclined portion 102 is provided on the substrate 1 and the inclined portion 20 is provided on the push-up plate 2.
It is recommended that 2 be formed to intersect in a wedge shape,
At this time, the wheel 91 enters between and presses the inclined portions 102 and 202, and pushes up the push-up plate 2 via the inclined portion 202. Of course, here the load is applied to the wheel 91,
The wheel 92 side, which is the rear part of the push rod 9, is pushed up, and pushes up the push-up plate 2. Further, the front inclination imparting portion 11 may be formed by forming a guide 110 having an inclination on which the wheel 92 rides in the forward direction of the wheel 92 behind the push rod 9.

When the wheel 92 rides on the guide 110, the push rod 9 receives the initial load of the rod 7 and tilts forward. When the push rod 9 is further stopped or slowed down by the inclination of the push rod 9, the push rod 9 is more clearly pushed by the rod 7, and the inclination is further increased. Then, the rear wheel 92 pushes up the push-up plate 2 and further pushes up the push-up plate 2 with the pivot 3 as a fulcrum. Alternatively, the inclined portion 102 may not be inclined but formed vertically to serve as a stopper. In this case, the inclined portion 202 of the push-up plate 2 is not required.

Further, as another configuration of the front inclination imparting portion 11, the indented portion into which the front wheel 91 falls is formed by the substrate 1 to the rail 101.
The indented portion also acts as a stopper, and can increase the inclination of the push rod 9 and the pushing force of the push-up plate 2.
Also, although the drive unit 8 is installed in a direction to push out the push rod 9,
The push rod 9 can be installed in the direction in which it is pulled backward.
Further, by providing the pivot point 94 on the drive source 5 side from the center point 95 of the push rod 9, the inclination of the push rod 9 can be further facilitated.

Next, the operation will be described. When using this product, it is moved by a wheel or the like provided on the substrate 1 to a position where a desired location is placed on the mounting plate 4 and, if necessary, by a stop device. Stop. Then, the drive source 5 is driven to extend the rod 7. At that time, the push rod 9 moves forward in the horizontal direction. Then, the push rod 9 comes to a certain point and inclines forward. That is, when the wheel 92 of the push rod 9 gets on the guide 110 of the inclination applying portion 11 and rides on it,
9 will be inclined forward in the traveling direction. When the push rod 9 is tilted forward and the wheels 92 are raised, the drive unit 8 is rotated about the pivot 6 to be raised. At this time, if the front wheel 91 hits the inclined portion 101 of the substrate 1, the rod 7
The pushing rod 9 is further inclined by being pushed by the button. And the rear wheel 92
Presses the push-up plate 2 and pushes it up. This inclined part 10
If 2 is formed in the vertical direction, the inclination of the push rod 9 proceeds faster. The portion placed on the placing plate 4 is lifted by the lifting of the push-up plate 2.

[0011]

According to the first aspect of the present invention, in the jack for pivotally supporting the push-up plate so as to be able to descend on the substrate, the push-rod is pivotally supported so as to be able to descend on the rod which reciprocates by the driving source. When the rod moves forward, a forward inclination applying portion that applies the forward inclination force to the pushing rod is provided at a desired position on the pushing rod, the substrate, or the pushing plate, so that the lifting of the pushing plate starts from the horizontal movement of the driving source. Therefore, it is not necessary to replace the power of the drive source with the force of the lever, and the height of the lever is not used as a constituent element. Therefore, the lever can be constituted only by the height of the drive source, and the overall height can be reduced. Therefore, it can be used in extremely low places, and can be used in places where conventional use is difficult, and the range of use has been expanded.

According to the second aspect of the present invention, the front inclination applying portion for applying the front inclination force to the push rod is installed by shifting the pivot point of the push rod to the rod from the center point of the push rod. The force of the source can be configured very simply by tilting the push rod forward without any other mechanism.

According to the third aspect of the present invention, the front tilt applying portion for applying the front tilt force to the push rod can be constituted only by using the front tilt cam, since the front tilt cam is provided on the substrate.
The purpose of low configuration can be easily achieved, and manufacturing and maintenance are simple.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention.

FIG. 2 is a side view of an operation state of another embodiment of the present invention.

FIG. 3 is a side view of an operation state of another embodiment of the present invention.

FIG. 4 is a side view of another embodiment of the present invention.

FIG. 5 is an enlarged plan view of an essential part of one embodiment of the present invention.

FIG. 6 is an enlarged side view of an essential part of one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Push-up plate 4 Placement tray 5 Drive source 7 Rod 8 Drive part 9 Push rod 11 Front inclination provision part

Claims (3)

[Claims] 1. A jack in which a push-up plate is pivotally supported on a substrate so as to be liftable and a push-up plate is raised by a drive source. A jack comprising a push rod, a substrate, or a push-up plate provided at a desired position on a push rod, a substrate, or a push-up plate, when the push rod is moved. 2. The push-rod inclining portion for applying a forward tilt force to the push rod is provided such that a pivot point of the push rod to the rod is shifted from a center point of the push rod. Jack. 3. The jack according to claim 1, wherein the front inclination applying portion for applying the front inclination force to the push rod is provided with a front inclination cam on the substrate.