JP2003226490A - Jack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a jack by making it jack up an object with a cylinder with smaller thrust than a conventional one and disposing an arm and the cylinder parallel to each other. <P>SOLUTION: The jack has the arm 5 with a tray 7 on the upper end side and a link 9. The lower end 6 of the arm 5 can be moved to the front and rear along guide rails 4. The lower end 10 of the link 9 is rotatable and the upper end is rotatably connected to the middle of the arm 5. The top of a rod 15 in the cylinder 12 is connected rotatably to a connection part 11 of the arm 5 and the link 9. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack, and more particularly to a jack used when jacking up a vehicle during repair or inspection of the vehicle.

[0002]

2. Description of the Related Art Conventionally, when repairing or inspecting the bottom of an automobile or the like, as shown in FIG.
02 to the jack point 104 of the car 103,
A garage jack that raises the automobile 103 by rotating and raising the arm 101 around a support shaft 105 is generally used.

However, in the above garage jack, when the saucer 102 is raised together with the arm 101, the saucer 102 rises along the locus of the arc of arrow A in FIG. 6, whereas the jack point 104 of the automobile is the ground contact surface. 106
There is a problem that the vehicle moves up and down along the locus of the arc of the arrow B centering around, and the vehicle moves in the front-back direction.

Therefore, conventionally, as shown in the schematic view of FIG. 7, a guide rail 201 parallel to the floor FL is provided, and a fulcrum C at the lower end of the arm 202 is provided on the guide rail 201 so as to be movable in the front-rear direction. A saucer 203 (this point is designated as D) is provided at the tip of the arm 202, a fulcrum E at the lower end of the link 204 is rotatably (not moved in the front-back direction), and the upper end of the link 204 is provided at the arm 20.
2 is rotatably connected to a middle portion of the fulcrum F, and the rod 2 of the cylinder 205 is connected to the fulcrum C at the lower end of the arm 202.
There is known a garage jack in which 06 is connected to vertically move the tray 203 by horizontally moving the rod 206 in the front-rear direction by the cylinder 205.

[0005]

In the prior art shown in FIG. 7, when the tray 203 is raised, the link 204 is erected via the arm 202 that tilts the horizontal thrust of the rod 206 in the cylinder 205. Since it is converted into a force, the thrust of the rod 206 is efficiently linked 2.
It has not been converted to an upright force of 04.

Further, since the cylinder 205 is arranged in series with the arm 202, there is a problem in downsizing the jack.

Therefore, the present invention has an object to provide a jack which solves the above problems.

[0008]

In order to solve the above-mentioned problems, a first invention according to claim 1 is an arm having a lower end movably provided by a guide rail in the front-rear direction and a saucer provided at the upper end. A jack having a link rotatably provided at a lower end thereof and rotatably connected to an intermediate portion of the arm at an upper end thereof, wherein the link is directly undulated by a cylinder.

According to a second aspect of the present invention, an arm having a lower end movably provided by a guide rail in the front and rear direction and a saucer provided at the upper end, and a lower end rotatably provided at the upper end in an intermediate portion of the arm. In a jack having a rotatably connected link, a tip of a rod of a cylinder is rotatably connected to a connecting portion between the arm and the link.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described with reference to the examples shown in FIGS.

FIG. 1 is a side sectional view showing a state where the tray is raised, and FIG. 2 is a side sectional view showing a state where the tray is lowered (stored).
2 is a plan view of FIG. 2, FIG. 4 is a rear view of FIG. 2, and FIG. 5 is a schematic view of the present invention.

In FIGS. 1 to 4, reference numeral 1 is a frame provided on both sides, on which wheels 2 are provided, and at a rear portion, a handle 3 is provided upright.

Inside the frame 1, there is provided a guide rail 4 in which an upper side edge 4a and a lower side edge 4b are juxtaposed in the horizontal direction with an appropriate interval. An arm 5 has a roller 6 attached to the lower end thereof, and the roller 6 is rotatably fitted between the upper side edge 4a and the lower side edge 4b of the guide rail 4. Therefore, the roller 6 can be moved in the front-rear direction along the guide rail 4 parallel to the floor surface FL. This roller 6 part is designated as point C in the schematic diagram shown in FIG. A receiving tray 7 is rotatably provided on a support shaft 8 at a tip portion of the arm 5 opposite to the roller 6. The 7 parts of the tray are designated as point D in the schematic diagram shown in FIG.

Reference numeral 9 is a link, the lower end of which is the support shaft 6
It is rotatably connected to the frame 1 side by a support shaft 10 in front of. The support shaft 10 is a frame 1
It does not move in the front-back direction. The supporting shaft 10 is designated as point E in the schematic diagram shown in FIG. The upper end of the link 9 is rotatably connected to the arm 5 by a support shaft 11. The spindle 1
1 is arranged in the arm 5 at an intermediate portion between the roller 6 and the tray 7. The supporting shaft 11 is designated as point F in the schematic diagram shown in FIG.

A cylinder 12 for generating hydraulic pressure is disposed between the frames 1 and 1, and a rear end of the cylinder 12 is supported by a switching valve 13 fixed to the frame 1 side behind the shaft 6. It is rotatably equipped with. The support shaft 14 is designated as point G in the schematic diagram shown in FIG. The tip of the rod 15 of the cylinder 12 is rotatably connected to the support shaft 11.

Reference numeral 16 is a link rod, the lower end of which is rotatably connected to the link 9 by a support shaft 17, and the upper end of which is rotatably connected to the tray 7 by a support shaft 18, so that the arm 5 is moved up and down. The saucer 7 is also kept in a horizontal state by the movement.

As shown in FIG. 3, the two arms 5 are arranged in parallel with each other, and the link 9 has an inner link 9a and an outer link 9a arranged on both sides of the two arms 5 and 5, respectively. It is composed of a link 9b, and two cylinders 12 are arranged.

An air pump 19 is provided with an air port 20a at the other end of the air hose 20 in the handle 3, and a compressor (not shown) is connected to the air port 20a. And the operation valve 2
1 is turned on to supply air to the air pump 19 to drive the air pump 19 to drive the oil tank 22.
The oil inside is pressed into each cylinder 12 through the switching valve 13 to drive the rod 15 forward. Further, the operation valve 21 is turned off, and the release knob 23 provided on the upper end of the handle 3 is loosened to switch the switching valve 13, thereby releasing the hydraulic pressure in the cylinder 12 and allowing the rod 15 to retreat. 5 is lowered by the load acting on it.

Next, the operation will be described.

When the tray 7 is to be raised from the storage state shown in FIG. 2, the release valve 23 is tightened while the compressor is connected to the air port 20a, and the operation valve 21 is turned on. As a result, the air pump 19
Is driven to supply oil from the oil tank 22 into the cylinder 12, the rod 15 moves forward, and the support shaft 11 (point F) provided at the tip of the rod 15 moves leftward in the drawing. By the forward movement of the support shaft 11 (point F), the link 9 is erected as shown in FIG. 1 around the stationary support shaft 10 (point E), and the support shaft 11 (point F) at the tip end thereof is pushed up. To be

As the support shaft 11 is pushed up, the support shaft 6 (point C) at the lower end of the arm 5 moves forward in the guide rail 4 and the support shaft 6 (C
Standing up around the point), the saucer 7 (point D) provided at the tip of the arm 5 rises.

Then, the saucer 7 is further raised in a state where it is in contact with the jack point of the automobile, and after the automobile is jacked up to a desired position, the operation valve 21 is turned off to stop the rise of the saucer 7.

When the tray 7 is lowered from the jack-up state shown in FIG. 1, the release knob 23 is loosened to release the hydraulic pressure in the cylinder 12, so that the rod 15 is retracted by the weight of the vehicle and the arm 5. Then, the arm 5 and the link 9 are laid down, the tray 7 is lowered substantially vertically, and is stored as shown in FIG. Therefore, the saucer 7
Moves up and down substantially vertically, and the jack of this embodiment is an approximately vertical lifting type garage jack.

The following effects are exhibited by the above structure and operation.

When the arm 5 is raised and the tray 7 is raised, the link 9 is directly raised by the cylinder 12, so that the link 204 is raised by the arm 202 as shown in FIG. In comparison, the thrust force of the cylinder 12 can be efficiently transmitted to the link 9,
It is possible to reduce the thrust force of No. 2 and downsize the cylinder.

Further, in the conventional structure shown in FIG. 7, since the rod 206 of the cylinder 205 moves horizontally, only the point C can move horizontally, but in the embodiment of the present invention, the arm 5 of the arm 5 moves. Since the lower end portion, that is, the roller 6 (point C) fitted to the guide rail 4 is not connected to the rod 15 of the cylinder 12, the rail 4 is deformed to move the roller 6 (point C) also in the vertical direction. You can also

That is, the guide rail 4 is connected to the chain line 4A in FIG.
As shown in FIG. 5, by forming the front side to incline upward, the arm 5 is erected in the forward leaning state when the arm 5 is erected, and the tray 7 is moved forward as indicated by arrow B in FIG. Can be raised while doing. As described above with reference to FIG. 6, this makes it possible to match the trajectory of the pan 7 with the trajectory B of the jack point 104 when the vehicle 103 rises around the ground contact surface 106. The movement in the front-back direction can be reduced.

Further, by deforming the guide rail 4 in the vertical direction as desired, the ascending / descending trajectory of the tray 7 can be set as desired.

Further, by connecting the rod 15 of the cylinder 12 to the support shaft 11 in the middle portion of the arm 5, the cylinder 12 can be arranged adjacent to the arm 5 in parallel, as shown in FIG.
As compared with the conventional structure in which the cylinder 205 is connected to the lower end of the arm 202 in series as shown in FIG. 1, the length of the jack in the front-rear direction can be shortened and the size can be reduced.

Further, in FIG. 1, when the load W of the automobile is applied to the tray 7, the arm 5 rotates about the support shaft 11, so that the roller 6 (C) at the lower end of the arm 5 is rotated.
The point) abuts on the upper edge 4a side. That is, the load of the automobile is supported by the upper side edge 4a, and the lower side edge 4b can be omitted to simplify the structure of the guide rail 4.

In the above embodiment, the tip of the rod 15 in the cylinder 12 is connected to the connecting portion between the arm 5 and the link 9, that is, the support shaft 11, but the tip of the rod 15 is connected to the link 9. The link 9 may be rotatably connected to a portion other than the support shaft 11, that is, an intermediate portion between the support shaft 10 and the support shaft 11.

[0032]

As described above, in the present invention, since the link is directly erected by the cylinder, the thrust of the cylinder can be efficiently converted into the erection actuation force of the arm, and the jack can be downsized by downsizing the cylinder. You can

Furthermore, since the arm and the jack can be arranged in parallel, the length of the jack in the front-rear direction can be shortened and the jack can be miniaturized as compared with the conventional arrangement in series. be able to.

Further, since the lower end of the arm is separated from the rod of the cylinder, it is possible to move the lower end of this arm along a desired locus by means of a deformed guide rail to move the saucer up and down along the desired locus. .

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, showing a raised state.

FIG. 2 is a side sectional view showing a state in which an arm or the like is laid down and stored from the state of FIG.

FIG. 3 is a plan view of FIG.

4 is a rear view of FIG.

FIG. 5 is a schematic diagram of the present invention.

FIG. 6 is a schematic view showing a usage state of a conventional jack.

FIG. 7 is a schematic diagram of a conventional jack.

[Explanation of symbols]

4 guide rails 5 arms 6 Roller on the lower end side of the arm 7 saucer 9 links 10 Roller at the bottom of the link 11 Connection 12 cylinders 15 rod

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akihiro Nagasaki             2 Suma-cho, Hekinan-shi, Aichi 2 Nagasaki Jack             Inside the corporation

Claims (2)

[Claims] 1. A jack having a lower end movably provided by a guide rail in the front-rear direction and having an upper end provided with a pan, and a lower end rotatably provided with a link rotatably connected to an intermediate portion of the arm. 2. A jack characterized in that the link is directly undulated by a cylinder. 2. A jack having a lower end movably provided by a guide rail in the front and rear direction and having an upper end provided with a pan, and a lower end rotatably provided with a link rotatably connected to an intermediate portion of the arm. In the jack, the tip of the rod of the cylinder is rotatably connected to a connecting portion between the arm and the link.