JPH0743073B2 - Fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement of an elevation device of a fan.

(B) Conventional Technique As a technique prior to the present invention, a fan represented by Japanese Utility Model Laid-Open No. 63-84498 is known. In this fan, a U-shaped pivot support plate is attached to the neck piece, and in this state, the neck piece is inserted into the forked portion of the support, and from the outside of the forked portion,
Insert the pivot bolt through the neck piece and pivot plate, screw the nut to the tip of the pivot bolt to prevent the pivot bolt from coming off, and sandwich the fork from both sides. ing.

However, in this configuration, the pivot bolts and nuts are exposed to the outside, and the appearance is not good.In addition, when a cover covering the pivot bolts and nuts is attached, the upper part of the support body looks large and looks bad. As a result, the number of parts is increased and assembly workability is poor.

In addition, the locking body is housed in the neck piece, and the locking body is engaged with and disengaged from the engagement hole of the pivot plate to adjust the vertical angle of the neck piece with respect to the effort. Since it is formed in a U-shape, the neck piece must be inserted into the pivot support plate while pressing the locking body with the fingers and the arm, and there are drawbacks such as poor assembly workability.

(C) Problem to be Solved by the Invention The present invention has been made in view of the above-described drawbacks, and an object of the present invention is to provide a fan that can improve appearance and assembling workability and simplify the structure.

(D) Means for Solving the Problems The present invention is directed to a neck piece that supports a fan main body, a pair of pivot support plates arranged on both side surfaces of the neck piece, and a spring body that is housed in the neck piece. A locking body that is biased outward, an engagement portion that is formed on the pivot support plate and that locks the locking body and adjusts the elevation angle of the neck piece with respect to the pivot support plate, and one pivot support plate. A connecting attachment piece that is bent and formed to be connected to the other pivot support plate, a pivot support bolt and a nut that couple the neck piece and the pair of pivot support plates, and a neck in a state where the pivot support plates are coupled. It is characterized in that it is provided with a fork of the support body into which the piece is inserted, and a screw for fixing the connecting wall of the fork and the connecting attachment piece of the pivot support plate.

Further, an annular recess centering on the pivot bolt in the above means 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. .

(E) Action The present invention mounts the pivot piece on both sides of the neck piece with the pivot bolts and nuts, thereby unitizing the neck piece and the pivot board to attach the neck piece to the pivot piece. Pivot. In this state, the pair of pivot support plates are connected to each other by the connecting attachment piece formed by bending from one pivot support plate, so that the pivot support pieces do not shift from each other and the neck piece is reliably supported. .

This unit is inserted into the bifurcated portion, and the connecting wall of the bifurcated portion and the connecting mounting piece of the pivotal supporting plate are fixed by screws, whereby the pivotal supporting plate and the bifurcated portion are integrated.

(F) Embodiment One embodiment of the present invention will be described below in detail with reference to the drawings.

The electric fan 1 is formed in the appearance shown in the perspective view of FIG. The fan 1 includes a base 3 having a pillar 2 projecting therefrom, a lift pipe 4 that is inserted into the pillar 2 to move up and down, and a neck piece that pivotally supports a fork 5 which is formed at an upper end of the lift pipe 4 so that the elevation angle can be adjusted. 6 and a fan main body 7 pivotably supported on the neck piece 6 so as to swing freely. The base 3 and the columns 2 are integrally formed of synthetic resin. In this structure, the base 3 is formed in a circular shape, a circular paragraph 8 is formed on the periphery thereof, and an arcuate curved wall 9 facing outward from the circular paragraph 8 is formed. An annular hanging wall 10 is formed in the portion of the base 3 for the circular paragraph 8 and the hanging wall 10 is formed.
A boss 13 into which a screw 12 for fixing the back plate 11 is screwed is formed in a portion having an opening angle of 90 degrees. Boss 13 and boss
A portion of the hanging wall 10 near 13 is formed to be lower than other hanging walls 10 by at least the material thickness of the back plate 11. Around the boss 13,
An annular hanging wall 14 reaching the lower surface of the curved wall 9 is formed. Back plate
Reference numeral 11 is formed of a sheet metal, and has an outer dimension that matches the inside of the hanging wall 10, and a fixed ear piece 15 is formed in a portion corresponding to the boss 13, and the fixed ear piece 15 is surrounded by the hanging wall 14.

The circular hanging wall 10 is formed in the circular paragraph 8 part, and the circular hanging wall is formed.
By forming 14 on the curved wall 9 portion, sinking to the surface of the base 3 can be prevented. The fixed ear piece 15 contacts the boss 13, and the hanging wall
By being surrounded by 10 and 14, rotation can be stopped and positioning can be performed. A switch 16 for controlling the electric motor of the fan main body 7 is fixed to the base 3.

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

The support having the fork 5 formed in this structure means the lifting pipe 4
It will be formed by the pillar 2 and the base 3. The shape, structure, and material of the support forming the bifurcated part 5 may vary depending on the equipment adopting the present invention.

The neck piece 6 is made of synthetic resin.

The neck piece 6 is a pivotal support portion 21 that is inserted and clamped in the forked portion 5.
And the support portion 22 of the fan main body 7. An insertion hole 24 through which a pivot bolt 23 penetrates is formed in the center of the pivot portion 21. An annular recess 25 centered on the insertion hole 24 is formed on one side surface of the pivot plate 21. A torsion spring 26 is housed in the annular recess 25, and one end of the torsion spring 26 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 peripheral direction from a notch 27 formed in the lower portion of the annular recess 25.

A spring body 28 and a spring body are provided on the outer periphery of the other side surface of the neck piece 6.
At 28, a concave portion 30 for accommodating the locking body 29 biased outward is formed.

A right pivot support plate 31 and a left pivot support plate 32 are attached to both side surfaces of the neck piece 6, and the neck piece 6 is sandwiched between the left and right pivot support plates 32, 31. The left and right pivotal support plates 32, 31 are formed by bending a metal plate. The right pivot plate 31 and the left pivot plate 32 have through holes 33 for the pivot bolts 23,
Forming 34. Insert the pivot bolt 23 into the through hole of the left pivot plate 32.
34 through the insertion hole 24 of the neck piece 6 so as to protrude from the through hole 33 of the right pivot plate 31, and a nut at the end of the pivot bolt 23.
35 is screwed in to connect the neck piece 6 and the left and right pivotal support plates 32 and 31, and the neck piece 6 is pivotally supported to the left and right pivotal support plates 32 and 31. Recesses 36, 3 for accommodating the head of the pivot bolt 23 and the nut 35 are provided on both side surfaces of the pivot plate 21 and the left and right pivot plates 32, 31.
7 and 38 are formed so that the head of the pivot bolt 23 and the nut 35 do not protrude from the left and right pivot plates 32 and 31.

At the rear edge of the right pivotal support plate 31, a right connection mounting piece 41 in which the left pivotal support plate 32 is bent is formed, and an insertion hole 42 for the screw 40 is formed. At the rear edge of the left pivot plate 32, the right connection mounting piece of the right pivot plate 31 is attached.
The left connection mounting piece 43 overlapping 41 is formed. The left connecting attachment piece 32 is formed with a screw hole 44 into which the screw 40 is screwed. At the edge of the left connecting mounting piece 43, the insertion locking hole 45 of the right connecting mounting piece 31
Forming a protrusion 46 to be inserted into. The other end locking piece 47 of the torsion spring 26 is bent and formed on the lower edge of the left connection mounting piece 31.

By attaching the left and right pivot plates 32 and 31 to the neck piece 6 with the pivot bolts 23 and the nut 35, the attachment of the torsion spring 26, the spring body 28, and the locking body 29 to the neck piece 6 can be completed. The neck piece 6 is pivotally supported on the left and right pivot plates 32, 31 by pivot bolts 23 so that the elevation angle can be adjusted. The locking at the depression / elevation angle adjustment position is performed by locking the locking body 29 in the engagement / disengagement hole 48 formed in the left pivotal support plate 32. Before the neck piece 6 is inserted into the fork 5, the assembly of the pivotal support mechanism of the neck piece 6 can be completed.

The bifurcated portion 5 is formed with a step portion 51 on the inner surface for positioning the left and right pivotal support plates 32, 31 in the front-rear direction and guiding the insertion, and positions the left and right pivotal support plates 32, 31 inward. The step portion 52 is formed. An insertion hole 54 for the screw 40 is formed in the rear connecting wall 53 of the bifurcated portion 5. By screwing the screw 40 into the screw hole 44 of the left pivotal support plate 32, the left and right pivotal support plates 32 and 31 can be fixed to the fork portion 5 and integrated.

A protrusion 55 is formed at the upper end of the bifurcated portion 5. Protrusion 55
Is inserted into a groove portion 56 formed in a portion of the neck piece 6 which covers the upper end of the forked portion 5. The groove portion 6 regulates the elevation angle range of the neck piece 6, and the protrusion 55 abuts on both ends of the groove portion 56. FIG. 1 shows the most depressed state, and FIG. 2 shows the most elevated state. By inserting the protrusion 55 into the groove 56, the spread of the fork portion 5 is also prevented.

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

The fork 5 supports the left and right pivot plates 32 and 31, so that the left and right pivot plates 32 and 31 mainly support the neck piece 6, and sufficient strength can be secured with 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, 31, and the strength is reduced due to the thinness. For bending, the projection 55 is engaged with the neck piece 6. Can be done with. The neck piece 6, the left and right pivot plates 32 and 31, and the fork portion 5 interact with each other, so that the supporting portion of the neck piece 6 can be downsized.

(G) Effect of the Invention According to the present invention, a pair of pivot plates are pivotally supported on both sides of the neck piece by pivot bolts and nuts, and are assembled into the forked portion in a united state. In addition to being able to improve, the pair of pivot support plates are connected by the connecting attachment piece, so the neck piece pivot support strength can be improved,
The neck piece can be reliably supported. Also,
Since the fork and the connecting attachment piece of the pivot support plate are fixed, the fork can be reinforced by the pivot support plate, and the neck piece is firmly and stably supported on the fork via the support plate. It is possible to do a smooth elevation. Furthermore, the pivot bolts and nuts can be covered by the fork,
By arranging the screw for fixing the bifurcated portion and the pivotal support plate on the back side, it is possible to improve the appearance.

[Brief description of drawings]

FIG. 1 shows the present invention, FIG. 1 is a right side vertical cross-sectional view of the main part of the neck piece with the neck piece being most depressed, and FIG. FIG. 4 is an exploded right side sectional view of an essential part, FIG. 4 is a vertical sectional front view of an essential part, FIG. 5 is an exploded vertical front view of an essential part, FIG. 6 is a perspective view of a fan, and FIG. 7 is an exploded perspective view of a neck piece part. FIG. 8 is a plan view crossed by a supporting column, FIGS. 9 and 10 are longitudinal side sectional views of different parts of the base, and FIG. 11 is a bottom view of the base. 2 ... Posts, 3 ... Base, 4 ... Lifting pipe, 5 ... Fork, 6
… Neck piece, 7… Fan, 23… Pivot bolt, 24
… Insertion hole, 26… Torsion spring, 28… Spring body, 29… Locking body, 31
... right pivot plate, 32 ... left pivot plate, 35 ... nut, 40 ... screw, 41
… Right connecting piece, 43… left connecting piece, 53… rear connecting wall.

Claims (2)

[Claims] 1. A neck piece for supporting a fan main body, a pair of pivot support plates arranged on both side surfaces of the neck piece, and a lock housed in the neck piece and urged outward by a spring body. A body, an engaging portion formed on the pivot support plate for adjusting an elevation angle of the neck piece with respect to the pivot support plate by locking the locking body, and one pivot support plate bent to form the other pivot member. A connecting attachment piece connected to the support plate, a pivot support bolt and a nut for connecting the neck piece and the pair of pivot support plates, and a support body into which the neck piece with the pivot support plate connected is inserted. An electric fan comprising: a fork portion; and a screw for fixing the connecting wall of the fork portion and the connecting attachment piece of the pivot support plate. 2. An annular recess centering on a pivot bolt is formed in a neck piece as claimed in claim 1, and one end of a torsion spring housed in the annular recess is locked to the neck piece, and the other end. An electric fan that locks the to the pivot plate.