JPH088923Y2 - Rotating jack angle setting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an angle of a rotary jack which can be mounted on a leg member with casters such as a workbench and ground the desired rotation position jack around the leg member. Regarding the deciding mechanism.

(Prior Art) The second and third conventional rotary jack angle determining mechanisms are provided with a bracket b at the lower end of a leg member 1 such as a workbench, and one side of the jack body 8 is rotated around the bracket b. It is movably mounted and the jack j is attached to the other side of the jack body 8.
Is provided.

A caster 2 is attached to the lower end of the bracket b, and a workbench or the like is usually installed on the floor via the caster 2.

In the specific configuration of the angle determining mechanism shown in FIG. 3, a bracket b is provided between the leg member 1 and the casters 2.

In the bracket b, the upper support plate 3 and the lower support plate 4 are opposed to each other, and the connecting member 5 is provided between the facing portions of the upper support plate 3 and the lower support plate 4. Then, the connecting member 5 is welded to one ends of the upper and lower supporting plates 3 and 4, and the upper supporting plate 3 and the lower supporting plate 4 are integrated via the connecting member 5.

Further, the upper support plate 3 and the lower support plate 4 are respectively formed with a shaft hole 3a and a shaft hole 4a having the same axis as the leg member 1, and the shaft member 6 is held by these shaft holes 3a and 4a. ing. The openings of the shaft holes 3a and 4a are closed by a pair of lid members 7, and both lid members 7 are attached to the upper and lower support plates 3,
Fixed to 4 respectively.

Then, one side of the jack body 8 is inserted between the facing portions of the upper support plate 3 and the lower support plate 4 of the bracket b,
The jack body 8 is rotatably attached to the shaft member 6, and the other side is projected outward from the outer periphery of the bracket b.

In the jack body 8, the upper arm 8a and the lower arm 8b are opposed to each other, and a pair of left and right frame members 8c are welded to both ends of the upper and lower arms 8a and 8b.
The upper and lower arms 8a and 8b are integrated with each other.

Further, a jack j is provided near the tip of the jack body 8 protruding outward of the bracket b. The jack j has a holding member 9 mounted between the upper arm 8a and the lower arm 8b. ing.

Further, the holding member 9 has its axis parallel to the axis of the shaft member 6, and has a shaft hole 9a and a bore 9b formed around this axis.

Then, the nut member 10 is attached to the bore 9b, the jack bolt 11 is inserted into the shaft hole 9a, the jack bolt 11 is screwed into the nut member 10, and the tip thereof is projected toward the floor surface.

Further, a pin hole 12 penetrating the lid member 7 fixed to the upper part of the bracket b and the upper support plate 3 is formed. The pin hole 12 is defined with a predetermined radius with the axis of the shaft member 6 as the center. A plurality of units are arranged on the locus at a predetermined interval. Then, the bracket b is made to face the pin hole 12.
A plurality of holes 13 are formed inside the lower support plate 4.
Further, the upper arm 8a and the lower arm 8b of the jack body 8 facing the inside of the upper support plate 3 and the lower support plate 4, respectively, at least one of which is defined by the same radius as the pin hole 12 Drill holes 14 and drill holes 15 are formed at the respective locations.

That is, when the jack body 8 is rotated, the upper arm 8a
The drilled hole 14 formed in 1 can be opposed to any one of the pin holes 12 formed in the bracket j. Further, if the pin hole 12 and the drill hole 14 face each other in this way, the drill hole 15 formed in the lower arm 8b and the hole 13 formed in the lower support plate 4 face each other, and eventually, the pin hole. 12, the drill holes 14, 15 and the holes 13 are arranged on the same axis as shown.

Then, when the workbench or the like is installed at a desired place, the jack body 8 is rotated so that the drill hole 14 is provided with a plurality of pin holes 12 so that the ground contact position of the jack j does not interfere with an obstacle.
One of them is opposed to the pin hole 12.

Pin holes 12, which are arranged on the same axis as described above,
A positioning pin 16 is inserted into the drill holes 14, 15 and the hole 13, and the jack body 8 is connected and fixed to the bracket b through the positioning pin 16 so as to maintain the illustrated state of use of the rotary jack angle determining mechanism. I was doing.

The jack bolt 11 is grounded so that the jack bolt 11 supports a workbench and the like, and the caster 2 is separated from the floor surface.

(Problems to be Solved by the Present Invention) In the conventional rotary jack angle determining mechanism as described above, the jack j is rotated around the leg member 1 to attach the jack body 8 to the pin hole 12 formed in the bracket b. Drill hole formed
14 were facing each other. Then, the pin holes 12, the drill holes 14, 15
Insert the positioning pin 16 into the hole 13 and the hole 13
Was fixed to the rotating position, and the jack j was grounded around the leg member 1 via the jack body 8.

As described above, the jack body 8 can be connected and fixed to the bracket b only at the rotating position where the pin hole 12 and the drill hole 14 face each other.

Therefore, there is a problem in that the jack provided on the jack body cannot be freely fixed in rotation around the leg member at 360 degrees even at its rotation position, and the jack cannot be grounded at a desired rotation position.

Further, as described above, the jack cannot be freely grounded at the desired rotation position. Therefore, there is also a problem that even if the obstacle interferes with the jack in a small installation place, the jack cannot be grounded while avoiding the obstacle.

Furthermore, since there is a gap between the pin hole and the drill hole, which is the connecting portion between the bracket and the jack body, and the outer periphery of the positioning pin, when the load such as the workbench is applied to the jack, the gap is provided through the gap. There was also a problem that the workbench rattled.

The object of the present invention is to provide a rotary jack angle determining mechanism that can freely fix the rotation at any rotation position of 360 degrees around a leg member such as a workbench and ground the jack at a desired rotation position. It is to be.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the invention provides a bracket having an upper support plate at one end of a shaft member and a lower support plate at the other end, and a bracket at the lower end of the leg member. The angle of the rotary jack, which is configured such that one side of the jack body is rotatably mounted on the shaft member and the other side is mounted with the jack body, and the jack body is rotatable around the leg member via the jack body. In the deciding mechanism, an annular groove is formed on the outer periphery of the upper support plate, and a hook portion formed on one side of the stopper member is rotatably held in the annular groove and a boss portion formed on the other side. When a positioning bolt is screwed into the shaft and the stopper member or the jack body is rotated, the tip of the positioning bolt and the jack body face each other.

(Operation of the present invention) As described above, when the positioning bolt of the stopper member is opposed to the jack body and the positioning bolt is screwed in, the tip of the positioning bolt abuts the jack body and the lower side of the jack body is the bracket. The upper side of the stopper portion of the stopper member is also pressed against the bracket.

Then, a frictional force is applied to the contact surface between the jack body and the bracket, and by the action of this frictional force, the jack body is coupled and fixed to the bracket and the jack body is prevented from rotating.

Further, since the jack body can be rotated around the shaft member of the bracket, the jack provided at one end of the jack body can be freely rotated 360 degrees around the leg member.

(Effects of the present invention) According to the rotary jack angle determining mechanism of the present invention, from the above, if the jack body is rotated, the jack body is rotated at 360 degrees regardless of the rotation position, and the jack body is rotated at any rotation position. Can be connected and fixed to the bracket.

Therefore, the jack provided on the jack body can be freely pivoted at any pivot position around 360 degrees around the leg member, and the jack can be grounded at the desired pivot position.

Further, as described above, the jack can be freely grounded at a desired rotational position, so that even if an obstacle interferes with the jack even in a narrow installation place, it is possible to avoid this and ground the jack.

Furthermore, since the bracket and the jack body are connected and fixed by the action of the frictional force applied to the contact surface,
There is no gap in the connecting part.

Therefore, when a load such as a workbench acts on the jack, the workbench or the like does not rattle due to the interposition of the gap of the connecting portion.

(Embodiment of the present invention) In the embodiment of the present invention shown in FIG. 1, an upper support plate 17 to which a hook member 17a is welded is provided at the tip of a leg member 1. Then, the hook member 17a is fitted to the leg member 1, the hook member 17a is hooked to the leg member 1 via the bolt 18, and the upper support plate 17 is connected and fixed to the leg member 1.

A recess 19 is formed in the upper support plate 17, one side of the shaft member 20 is fitted into the recess 19, and the shaft member 20 is
A lower support plate 20a is formed on the other side.

Then, the upper support plate 17 and the shaft member 20 are fastened with bolts 21, and a bracket B is constituted by the shaft member 20 in which the upper support plate 17 and the lower support plate 20a are integrated. B upper support plate 17 and lower support plate 20a
A jack body 22 is provided between the portions facing each other.

The jack body 22 provided as described above has one side rotatably mounted on the outer periphery of the lower support plate 20a and the other side protruding outward from the outer periphery of the upper support plate 17.

In the jack body 22, the upper arm 22a and the lower arm 22b are opposed to each other, and the upper and lower arms 22a, 22b are
Is welded to a pair of left and right frame members 22c, and the upper arm 22a and the lower arm 22b are integrated via the frame member 22c.

The jack j is provided near the tip of the jack body 22 as described above. Since the structure of the jack j is the same as that of the conventional one, the same reference numerals as those in the conventional case of FIG. The conventional description is quoted as it is, and the detailed description is omitted.

An annular groove 23 is formed on the outer periphery of the upper support plate 17, and a step portion 24 is formed on the lower end of the outer periphery of the upper support plate 17. Then, the hook member 27 is attached to the stepped portion 24, and the bent portion of the outer end thereof is formed as a bent portion 27a.

A stopper member s is provided in contact with the outer circumference of the annular groove 23. The stopper member s has a hooking portion 25 formed on one side thereof attached to the annular groove 23 and is provided outside the annular groove 23. The other side that is projected is the boss portion 26. Above boss
A screw hole 26a is formed in the axial direction of 26, and a positioning bolt 28 is screwed into the screw hole 26a.

Further, on the lower side of the hook portion 25, at the base of the hook portion 25 and the boss portion 26, a hook groove 25a is formed, and the hook member 27 is folded in the hook groove 25a. The curved portion 27a is projected.

The bent portion 27a prevents the stopper member s from coming off, and the boss portion 26 is held so as to be freely rotatable along the outer periphery of the upper support plate 17.

In the upper arm 22a located below the boss portion 26 as described above, the recess 29 is formed so as to face the tip of the positioning bolt 28 provided in the boss portion 26. Then, by rotating either the stopper member s or the jack body 22, the concave portion 29 and the positioning bolt 28 are opposed to each other, and the tip of the concave portion 29 is projected into the concave portion 29. s and the jack body 22 are connected.

As described above, when the stopper member s and the jack body 22 are connected via the positioning bolt 28 and the jack body 22 is rotated around the shaft member 20, the stopper member s connected to the jack body 22 is It moves with the body 22 and rotates along the outer periphery of the upper support plate 17. And the jack body 22
The jack j provided at the tip of can be freely rotated 360 degrees around the leg member 1.

Then, when a workbench or the like is installed at a desired place, the positioning bolt 28 as described above is further screwed in, and the tip end thereof is brought into contact with the recess 29. Thus, when the positioning bolt 28 comes into contact with the recess 29, the positioning bolt 28
This pressing force acts on the jack body 22, and this reaction force acts on the stopper member s via the positioning bolt 28.

The lower arm 22b of the jack body 22 is pressed against the upper surface of the lower support plate 20a by the action of pressure p ₁ , and the upper surface of the hooking portion 25 formed on the stopper member 22 is pressed against the upper support plate 17. It is pressed by the action of p ₂ .

As described above, when the stopper member s is pressed against the upper support plate 17 and the jack body 22 is pressed against the lower support plate 20a, pressure is applied to the contact surface between the stopper member s and the upper support plate 17. The frictional force due to the action of p _{2 and} the frictional force due to the action of pressure p ₁ are applied to the contact surface between the jack body 22 and the lower support plate 20a. The bracket B and the jack body 22 are connected and fixed to each other by the frictional forces, and the jack body 22 is prevented from rotating and held in the illustrated use state.

According to the above-described embodiment, both the jack body 22 and the stopper member s can be freely rotated about the shaft member 20 by 360 degrees. Then, the jack body 22 is rotated to a desired rotation position, and a positioning bolt that opposes the jack body 22.
Screw in 28 and push the jack body 22
A frictional force is applied to the contact surface between the bracket B and the bracket B. By the action of this frictional force, the jack body 22 is fixedly connected to the bracket B and prevented from rotating.

From the above, if the jack body 22 is rotated, the jack body 22 can be connected and fixed to the bracket B at any rotation position by 360 degrees regardless of the rotation position.

Therefore, the jack provided on the jack body can be freely pivoted at any pivot position around 360 degrees around the leg member, and the jack can be grounded at the desired pivot position.

Further, as described above, the jack can be freely grounded at a desired rotational position, so that even if an obstacle interferes with the jack even in a narrow installation place, it is possible to avoid this and ground the jack.

Furthermore, since the bracket and the jack body are connected and fixed by the action of the frictional force applied to the contact surface,
There is no gap in the connecting part.

Therefore, when a load such as a workbench acts on the jack, the workbench or the like does not rattle due to the interposition of the gap of the connecting portion.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG.
FIG. 3 shows a conventional device. FIG. 2 is a schematic view of a workbench and the like, and FIG. 3 is a sectional view of a conventional mechanism. 1 ... Leg member, B ... Bracket, 17 ... Upper support plate,
20 ... Shaft member, 20a ... Lower support plate, 22 ... Jack body, j ... Jack, 23 ... Annular groove, s ... Stopper member, 25 ... Hooking portion, 26 ... Boss portion, 28 …… Positioning bolt.

Claims (1)

[Scope of utility model registration request] 1. A bracket having an upper support plate provided at one end of a shaft member and a lower support plate provided at the other end is attached to the lower end of a leg member, and one side of a jack body is rotatable on the shaft member. In the angle setting mechanism of the rotary jack, which is configured so that the jack is attached to the other side and the jack can be rotated around the leg member through the jack body, an annular groove is formed on the outer periphery of the upper support plate. , While retaining the hooking portion formed on one side of the stopper member in the annular groove in a rotatable manner,
When a positioning bolt is screwed into a boss formed on the other side so that either the stopper member or the jack body is rotated, the tip of the positioning bolt and the jack body face each other. Angle determination mechanism.