JPH02266194A - Elevating mechanism - Google Patents

Abstract

PURPOSE:To enable the reinforcement of a fork part and a neckpiece, their stable supporting and smooth elevation by completing the assembly of an elevating structure through a fulcrum plate, a fulcrum bolt and nut before assembling the neckpiece in the fork part of a support. CONSTITUTION:Symmetrical fulcrum plates 32, 31 are installed in a neckpiece 6 with a fulcrum bolt 23 and a nut 35, through which installation of a torsion spring 26, a spring body 28 and an engaged body 29 to the neckpiece 6 is completable. In addi tion, the neckpiece 6 is pivotally supported on these symmetrical fulcrum plates 32, 31 free of angle adjustments with the fulcrum bolt 23. Engagement to an elevating angle adjusting position is carried out with engagement of the engaged body 29 to a detachable hole 48 formed in the left fulcrum plate 32. Then, assembly of a fulcrum mechanism of the neckpiece 6 can be completed before inserting it into a fork part 3 hereat. Next, an insertional through hole 54 of a screw 40 is formed in a rear connecting wall 53 of this fork part 5, and this screw 40 is screwed in a tapered hole of the left fulcrum plate 32, whereby both these fulcrum plates 32, 31 are clamped to the form part 5 so that they can be unified in one end, what is more, any possible expansion to the outside of these fulcrum plates 32, 31 is retrained from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an elevating device used for electric fans, bonnet dryers, microphone stands, lighting equipment, and the like.

(B) Prior Art As a technology prior to the present invention, there is an elevation angle adjusting device (elevation device), which is typified by Japanese Utility Model Application Publication No. Sho 63-84498. The elevation angle adjustment device involves inserting a neck piece that supports the main device into the forked part of the stand (support body), inserting a pivot bolt that passes through the neck piece from the outside of the forked part, and
A nut was screwed into the tip of the pivot bolt to prevent it from being pulled out, and the two prongs were held from both sides.

Since the fork part and neckpiece are made of synthetic resin, the dimensions between the pivot bolt and nut and the fork part may change due to resin fatigue over time, causing loosening of the neckpiece. The slack becomes even greater when the head is tilted and rotated,
Backlash occurs between the forked part and the neck screw, making it impossible to perform stable and safe elevation and elevation adjustments.

<C) Problems to be Solved by the Invention It is an object of the present invention to provide an elevating device that prevents the occurrence of backlash during long-term use, improves ease of assembly, and simplifies the structure. .

(d) Means for solving the problem In the present invention, a pair of pivot plates are attached to both sides of a neckpiece that supports the main body of the device using pivot bolts and a neck piece, and the side edges of the pivot plates are overlapped. A connecting mounting piece is formed, and a neck piece with a pivot plate attached is inserted into the forked part formed on the support body,
The problem is solved by means of fixing the connecting wall of the two-pronged part and the connecting mounting piece with screws.

Further, in the above-mentioned means, a locking body that is biased outward by a spring body is housed in the outer periphery of the neckpiece, and the locking body supports an engaging portion that engages and disengages when the neckpiece rotates. The problem can also be better solved by means of forming the

Furthermore, in each of the above-mentioned means, an annular recess centered on the pivot bolt is formed in the neck piece, one end of the torsion spring housed in the annular recess is engaged with the neck piece, and the other end is engaged with the pivot plate. The problem can be solved even better by means of forcing people to do so.

(E) Function The present invention provides pivot plates on both sides of the neckpiece.
・By attaching it with the nut, the neckpiece can be pivoted against the pivot plate.

By forming the connecting mounting pieces on the side edges of the pivot plate so that they overlap and fixing the connecting wall of the knee fork and the connecting mounting piece with screws, the pivot plate and the two prongs are integrated, and the pivot Prevents the plate from spreading outward.

(F) Embodiment The configuration of the present invention will be explained in detail based on the illustrated electric fan 1, which is a 4# structure to which the present invention is applied.

The one-fan wind ja1 is formed to have the appearance shown in the perspective view shown in FIG. The electric fan 1 includes a base 3 with a pillar 2 projecting thereon, a lifting vibrator 4 that is inserted into the pillar 2 and moves up and down, and a neck piece that is pivoted to a bifurcated part 5 formed at the upper end of the lifting vibe 4 so that the angle of elevation can be adjusted. 6, and a fan main body 7 pivotably supported on the neckpiece 6. The base 3 and the support column 2 are integrally formed of synthetic resin. In this structure, the base 3 is formed in a circular shape, has a circular stepped portion 8 formed around it, and forms an arcuate curved wall 9 facing outward from the circular stepped portion 8. An annular hanging wall 10 is formed in the part of the base 3 that corresponds to the circular step part 8, and a boss 13 into which a screw 12 for fixing the back plate 11 is screwed is formed in a part of the hanging wall 10 having an opening angle of 90 degrees. is formed. The boss 13 and a portion of the hanging wall 10 near the post 13 are formed to be lower than the other hanging walls 10 by at least the material thickness of the back plate 11. An annular hanging wall 14 is formed around the boss 13 and extends to the lower surface of the curved wall 9.

The back plate 11 is made of sheet metal, has external dimensions that match the inside of the hanging wall 10, and has a fixed lug 15 formed in a portion corresponding to the boss 13, and the fixed lug 15 is surrounded by the hanging wall 14.

By forming the annular hanging wall 10 at the circular step portion 8 and forming the annular hanging wall 14 at the curved wall 9, sink marks on the surface of the base 3 can be prevented. The fixed lug 15 comes into contact with the boss 13 and is surrounded by the hanging wall 10.14, thereby preventing rotation and positioning. A switch 16 for controlling the electric motor of the fan main body 7 is fixed to the base 3.

The electric fan main body 7 is swingably supported by the neck piece 6 and changes the direction of air blowing from the blower blades covered by the guard body.

In this structure, the support body in which the bifurcated part 5 is formed is the lifting vibrator 4.
It is formed by the pillar 2 and the base 3. The shape, structure, and material of the support forming the bifurcated portion 5 vary depending on the device that employs the present invention.

The neck piece 6 is made of synthetic resin.

The neck piece 6 has a pivot portion 21 which is inserted and held between the forked portions 5.
and a support portion 22 of the fan main body 7.

An insertion hole 24 is formed in the center of the pivot portion 21, through which the pivot bolt 23 passes. On one side of the pivot portion 21, four annular portions 25 are formed around the insertion hole 24.

A torsion spring 26 is housed in the four annular portions 25, and the torsion spring 2
One end of the annular recess 25 is engaged with a locking portion on the inner wall of the annular recess 25 .

The other end of the torsion spring 26 extends in the outer circumferential direction from a notch 27 formed in the lower part of the annular recess 25 .

A recess 30 is formed on the outer periphery of the other side of the neck piece 6 to accommodate a spring body 28 and a locking body 29 that is biased by an external force by the spring body 28.

A. Attach the right pivot plate 31 and the left pivot plate 32 to both sides of the ivy piece 6, and attach the neck piece 6 to the left and right pivot plates 32.3.
Clamp at 1. The left and right pivot plates 32 and 31 are formed by bending sheet metal. Through holes 33 and 34 for the pivot bolts 23 are formed in the right pivot plate 31 and the left pivot plate 32. Insert the pivot bolt 23 into the neck piece 6 through the through hole 34 of the left pivot plate 32.
through the insertion hole 24 of the right pivot support plate 31, protrude from the through hole 33 of the right pivot support plate 31, and screw the neck I. 31, and the neck piece 6 is pivotally supported on the left and right pivot support plates 32 and 31. Both sides of the pivot 21 and left and right pivot plates 32.3
1 is formed with recesses 36, 37, 38 for housing the head of the pivot bolt 23 and the nut 35, and the left and right pivot plates 32, 31
The head of the pivot bolt 23 and the nut 35 are prevented from protruding from the top.

A right connecting mounting piece 41 is formed at the rear edge of the right pivot plate 31 to be bent toward the left pivot plate 32, and an insertion hole 42 for a screw 40 is formed therein. A right pivot plate 31 is attached to the rear edge of the left pivot plate 32.
A left connecting attachment piece 43 is formed which overlaps the right connecting attachment piece 41. A screw hole 44 into which a screw 40 is inserted is formed in the left connection mounting piece 32. A protruding piece 46 is formed on the edge of the left connecting attachment piece 43 to be inserted into the insertion locking hole 45 of the right connecting attachment piece 31. A torsion spring 2 is attached to the lower edge of the left connecting mounting piece 31.
The locking moon 47 at the other end of 6 is formed by bending.

Attach the left and right pivot plates 32 and 31 to the neck piece 6 with the pivot bolt 2.
3 and the nut 35, it is possible to complete the installation of the torsion spring, the spring body 28, and the JL body 29 to the neckpiece 6. The neck piece 6 is pivotally supported by a pivot bolt 23 with respect to the left and right pivot plates 32 and 31 so as to be able to freely adjust the elevation angle by one angle. Locking to the elevation angle adjustment position is performed by locking the locking body 29 into a locking hole 48 formed in the left pivot plate 32. Before inserting the neckpiece 6 into the fork 5, the assembly of the pivot mechanism of the neckpiece 6 can be completed.

The pronged portion 5 has a stepped portion 51 formed on the inner surface for positioning the left and right pivot plates 32.31 in the front-rear direction and guiding the insertion thereof, so as to position the left and right pivot plates 32.31 to the back. A stepped portion 52 is formed. A through hole 54 for the screw 40 is formed in the rear connecting wall 53 of the fork 5. By screwing the screw 40 into the screw hole 44 of the left pivot plate 32, the left and right pivot plates 32
．． 31 can be fixed to the forked part 5 and fixed together.

A protrusion 55 is formed at the north end of the fork 5.

The protrusion 55 is formed in a portion that covers the ``Y'' end of the three-pronged portion 5 of the neck piece 6, and is inserted into the door groove portion 56. The groove 6 regulates the range of elevation angle of the neckpiece 6, and the protrusion 55 abuts both ends of the groove 56. Fig. 1 shows the most prone position, and Fig. 2 shows the most upward position. By inserting the protrusion 55 into the groove 56, the forked portion 5 is also prevented from expanding.

In order to prevent the bifurcated portion 5 from expanding, the groove portion 56 may have a structure in which both ends are open and the upper edge of the bifurcated portion 5 is inserted into the groove portion 56.

Also, by supporting the left and right pivot plates 32 and 31 of the portion 5, the neck piece 6 is mainly supported by the left and right pivot plates 32 and 31, and sufficient strength can be ensured with the sheet metal. The bifurcated portion 5 can be made thin as long as it functions as a cover for the left and right pivot plates 32 and 31, and the reduction in strength and deflection due to the thinness can be avoided by engaging the protrusion 55 with the neck piece 6. This can be done by Neck piece 6, left and right pivot plates 32, 31, and bifurcated portion 5
interact with each other, so that the support portion of the neckpiece 6 can be made smaller.

(G) Effects of the Invention The present invention allows the assembly of the elevating structure using the pivot plate, the pivot bolt, and the nut to be completed before the neckpiece is assembled into the fork part of the support body, and the pivot plate can be attached to the fork part of the support body. By wearing it, the fork and neckpiece can be reinforced and stably supported, allowing for smooth elevation.

[Brief explanation of drawings]

The figures show the present invention; FIG. 1 is a vertical cross-sectional right side view of the main part with the neckpiece in the most downward position, FIG. 2 is a vertical cross-sectional front view of the main part with the neckpiece in the most upward position, and FIG. Figure 4 is an exploded right side sectional view of the main part, Figure 4 is a vertical front view of the main part, Figure 5 is a front exploded front view of the main part, Figure 6 is a perspective view of the electric fan, Figure 7 is an exploded perspective view of the neck piece, FIG. 8 is a plan view taken across the support, FIGS. 9 and 10 are side longitudinal sectional views of different parts of the base, and FIG. 11 is a bottom view of the base. 2... Support column, 3... Base, 4... Lifting pipe, 5
...Two prongs, 6...Neck piece, 7...Fan main body, 23...Pivot bolt, 24...Insertion hole, 26
...Torsion spring, 28...Spring body, 29...Locking body, 31...Right pivot support plate, 32...Left pivot support plate, 35...
・Syto, 40...Screw, 41...Right connection mounting piece,
43...Left connection mounting piece, 53...Rear connection wall.

Claims (1)

[Claims] 1. A pair of pivot plates are attached to both sides of the neckpiece that supports the main body of the device using pivot bolts and nuts, and connecting mounting pieces are formed that overlap the side edges of the pivot plates; An elevating device in which a neckpiece with a pivot plate attached is inserted into two prongs formed on a support body, and a connecting wall of the two prongs and a connecting mounting piece are fixed with screws. 2. In claim 1, an engagement body in which a locking body that is biased outward by a spring body is housed in the outer periphery of the neckpiece, and the locking body is engaged and released by rotation of the neckpiece. An elevation angle adjustment device in which a pivot plate is formed with a pivot plate. 3. In claim 1 or 2, an annular recess centered around the pivot bolt is formed in the neck piece, one end of a torsion spring accommodated in the annular recess is locked to the neck piece, and the other end is fixed to the neck piece. An elevation device or an elevation angle adjustment device which is made by locking a pivot plate. 4. A device having an elevation device or an elevation angle adjustment device according to claim 1, 2, or 3. 5. The blower device according to claim 4, wherein the neckpiece supports an electric motor that drives the blower blades.