JPH0743074B2 - Fan - Google Patents

Description

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

(B) Conventional technology Conventionally, as an elevation device for an electric fan, for example, the actual machine 63-8449
Publication No. 8 (F16M 11/10) and the like are known. In this elevation device, pivot support plates are arranged on both side surfaces of the neck piece and inserted into the bifurcation of the support, and the pivot support plate and the neck piece are penetrated from the outside of the bifurcation to insert pivot support bolts. The neck piece is supported by screwing the nut to the pivot bolt and tightening the fork.

However, since the pivot bolts and nuts are exposed to the outside, it does not look good, and when a cover is attached to hide the pivot bolts and nuts, the upper part of the support body looks large and looks bad. There were drawbacks such as increased points and poor workability.

Therefore, the neck piece is provided with a shaft biased outward, and this shaft is fitted into the forked part of the support from the inside thereof. JP-A-62-20692 (F04D 25 / 08)
Was proposed in.

However, in this configuration, when a force is applied to the fan mainly in the lateral direction and the force for expanding the bifurcated portion is applied to the outside, the expansion of the bifurcated portion is not restricted by the pivot bolt as in the above-described conventional technique. As a result, the forked portion may bend outward, and in extreme cases, it may be damaged. (C) Problem to be Solved by the Invention An object of the present invention is to provide a fan capable of preventing the spread of the fork portion.

(D) Means for Solving the Problems The present invention is directed to a neck piece that supports a fan main body, a pivot support plate that is arranged on the side surface of the neck piece, and a neck piece that is housed in the neck piece and is directed outward by a spring body. A biasing locking body, an engaging / disengaging hole provided in the pivot support plate for adjusting the depression / elevation angle of the neck piece with respect to the pivot support plate by locking the locking body, the neck piece and the pivot support plate, A support bolt and a nut for connecting the pivot support plate and a bifurcation of a support body into which the neck piece in a state in which the pivot support plate is coupled is inserted, the neck piece being close to the bifurcation end edge. A protruding portion is formed, and a groove portion extending in the elevation / rotation direction is formed in a portion of the protruding portion facing the bifurcated end edge, and a protrusion to be inserted into the groove portion is formed on the bifurcated end edge. It is characterized by being formed.

(E) Operation According to the present invention, by inserting the protrusion formed on the fork into the groove formed on the neck piece, the expansion of the fork is prevented, and the protrusion causes the groove to form a neck piece. It guides you to turn up and down.

(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 held by 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.
A left connecting attachment piece 43 is formed so as to overlap with 41. 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 As described above, according to the present invention, it is possible to prevent the outward extension of the bifurcated portion with a simple configuration, and it is possible to achieve the effect of smoothly raising and lowering the neck piece. Play.

[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 in the most lowered position, and FIG. 2 is a vertical right side view of the main part in the state where the neck piece is most elevated. 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 sectional 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 of the base crossed, FIG. 9 and FIG. 10 are 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 (1)

[Claims] 1. A neck piece for supporting a fan main body, a pivot support plate disposed on a side surface of the neck piece, a locking body housed in the neck piece and urged outward by a spring body. An engagement / disengagement hole provided in the pivot support plate for adjusting an elevation angle of the neck piece with respect to the pivot support plate by a locking body being engaged, and a pivot support bolt and a nut for connecting the neck piece and the pivot support plate. A bifurcation part of a support body into which the neck piece in a state in which the pivot support plate is connected is inserted, and the neck piece is formed with an overhanging portion that is proximate to an end edge of the bifurcation part. An electric fan, wherein a groove extending in the elevation / rotation direction is formed at a portion of the overhanging portion facing the fork end edge, and a protrusion to be inserted into the groove is formed at the fork end edge.