JPH0219125A - Suction cleaner - Google Patents

Abstract

PURPOSE:To automatically exclude a thread wound around a pulley and to dispense with a maintenance by graving a spiral groove on the outer circumferential surfaces of both or either pulley of a driving pulley and a slave pulley. CONSTITUTION:By a driving pulley 10 fixed to a rotary shaft 5a of a driver 5 and a belt 7 strung between the pulley 10 and a slave pulley 4 fixed to a rotary brush 3, the rotary brush 3 is driven. On the outer circumferential surface of the pulley of both or either of the driving pulley 10 and slave pulley 4, a spiral groove 11 is graved. As a result, the thread wound around the pulley can be automatically excluded, and the maintenance can be made unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vacuum cleaner equipped with a rotating brush driven by a belt. It is about prevention.

[Conventional technology]

As a conventional vacuum cleaner equipped with a rotating brush, there is one shown in FIG. 8, for example.

This is a suction tool for a vacuum cleaner, in which brush bristles 2 are erected in a suction tool main body 1 with an open bottom surface, and are fixedly disposed on a rotary brush 3 that is rotatably supported. driven pulley 4 and a rotating shaft 5 of a drive device 5 such as a motor.
A drive belt 7 is stretched between a drive pulley 6 and a drive pulley 6 fixedly attached to a.

In the configuration described below, by rotating the drive device 5, the rotating brush 3 rotates on the floor surface 8.

As a result, the dust 9 on the floor is swept up, and the suction force of the suction device of the vacuum cleaner body (not shown) is used to join the join i □
1a and stored in a dust box (not shown). However, threads, hair, cotton waste, etc. (hereinafter collectively referred to as thread waste) are guided by the intake air flow and tend to wrap around the outer peripheral surface of the drive pulley 6.
Therefore, the outer diameter of the drive pulley 6 becomes large, and the tension of the belt becomes excessive, causing damage. Also, as a result of applying an excessive load to the motor etc., there is a risk of burnout, or
There were many problems such as the belt coming off the drive pulley 6.

Conventionally, as a countermeasure against these problems, for example, Japanese Patent Application Laid-open No.
Publication No. 5 discloses a device in which a pulley is provided with a separate idle pulley adjacent to the pulley, and when thread entanglement occurs, the belt moves to the idle pulley and stops the rotation of the rotating brush. , Utility Model Application Publication No. 60-171249 discloses a suction device that is provided with a detection body for detecting the locked state of the belt due to thread entanglement, and lights up a lamp to notify the user of the occurrence of thread entanglement. There is. Further, in Japanese Utility Model Application Publication No. 63-12353, a pulley is formed from a shape memory alloy, and the circumferential surface of the pulley has a convex cross section at room temperature, but the temperature rises due to frictional heat due to thread entanglement. A suction tool is disclosed in which the belt becomes linear or concave in cross section as the belt rotates idly. however,
Do any of these suction devices notify you of line entanglement?
Alternatively, the purpose is to stop the rotation of the rotating brush in the event of thread entanglement, thereby preventing damage to the belt or pulley.

[Problem to be solved by the invention]

However, these conventional techniques only notify the user of the phenomenon of entanglement and encourage them to remove it.
There was an inconvenience in that the user had to remove the twisted thread waste each time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a suction vacuum cleaner equipped with a pulley that can automatically remove entangled threads, so that the above-mentioned maintenance is unnecessary for the user. be.

[Means for Solving the Problems] In order to achieve the above object, a suction cleaner according to the present invention has a spiral groove carved on the outer peripheral surface of a drive pulley that is fixed to a rotating shaft of a drive device. It is.

[Effect]

The basic principle is to utilize the relationship between a bolt (male thread) and a nut (female thread).

In other words, if you hold the nut screwed into the bolt with your fingers and twist the bolt (rotate), the nut will move either to the right or to the left in the longitudinal direction of the bolt, depending on the twisting direction of the helical groove of the bolt. do.

The present invention was devised by replacing the bolt (male thread) with a thread waste wrapped around a nut (female thread) around a drive pulley, and replacing the fingers with a belt.

The premise of the above thread discharge principle is that there must be a relative speed difference between the "wound thread" and the "helical grooved pulley". If both rotate at the same time, the thread simply remains in that position and does not move along the helical height. As mentioned in the basic principle, pressing the nut with your fingers means that a relative velocity is generated between the two, but
In the present invention, in which "fingers" are replaced with "belts," the belt itself also moves in a manner equivalent to "rotation," making it difficult to maintain a relative speed difference between the thread and the helical grooved pulley. However, if a sufficient amount of thread is wrapped around the machine without affecting the body, the thread will be interposed between the pulley and the belt, and 100% of the rotation of the pulley will not be transmitted to the belt. A so-called slip phenomenon occurs.

In other words, even though the pulley is rotating, the belt may rotate more slowly or in extreme cases may stop.
The wound thread waste moves to the right or left along a spiral groove carved on the outer peripheral surface of the pulley. The direction in which the thread moves is determined by the relationship between the rotational direction of the pulley and the spiral direction carved on the outer circumferential surface, so which direction is set can be selected depending on the design of the main body.

Since the thread waste wrapped in this way moves along the spiral groove carved into the pulley, it would be easier to move the thread if the pulley became gradually thinner as it progresses in the direction of movement. become.

Based on this principle, the thread wound between the belt and the outer circumferential surface of the pulley can be moved in the axial direction of the pulley and eventually eliminated.

〔Example〕

FIG. 1 shows a first embodiment of the present invention, in particular an embodiment of the apparatus set forth in claim 2. In FIG. Note that the same parts as in FIG. 8 are indicated by the same reference numerals, so redundant explanation will be omitted.

The drive pulley 10 is fixed to a rotating shaft 5a that is cantilevered by the drive device 5, and the outer peripheral surface 10 of the drive pulley 10
A spiral groove 11 is carved in a.

In FIG. 2, the rotational relationship of the drive pulley 10 is as indicated by the arrow, which means that when the drive device 5 is viewed from the drive pulley 10 side, it is counterclockwise.

As is clear from the figure, a spiral groove is carved in the outer circumferential surface 10a of the drive pulley 10 in the same twisting direction as the "left-hand thread".

In the above configuration, the thread waste 9 located between the outer periphery of the drive pulley 10 and the drive belt 7 (see FIG. 2) becomes an obstacle to transmitting the rotation of the drive pulley 10 to the drive heald 7. Belt 7 begins to slip.

For example, if the drive pulley lO is rotating at 5.000rr+m and the belt 7 is moving at a rotation rate of, for example, 4.3QQrpm, the difference in relative rotational speed is 5.0
00rpm-4,80Orpm=20Orpm. This means that the belt is at rest and the drive pulley 10
rotates at 200 rpm, which means that the belt 7 prevents only the thread waste 9 from rotating together with the driving pulley 10 and the thread waste 9 wound around it. Therefore, the thread waste 9 is pushed out along the spiral groove 11 as shown in FIGS. 2(b) and 2(c), moves in the direction of the arrow, and is removed as a result. The removed yarn waste 9 is stored in a dust box by a suction device (not shown).

Incidentally, if the pitch of the spiral groove 11 is too large, it becomes difficult to remove the thread waste 9, and if it is too small, the movement of the thread waste 9 becomes slow, so the number of pitches may be selected appropriately. Since the above-mentioned theory of male threads and female threads applies to these, detailed explanations will be omitted.

Furthermore, when a large amount of thread waste 9 is wrapped around the belt 7 to the extent that it slips, the tension of the belt 7 increases, and the thread waste 9 is pulled into the spiral groove 1.
1, which makes it difficult for the thread waste 9 to move, but since the principle of the present invention applies the screw theory as described above, the force to be removed is It can be obtained in minutes.

In the first embodiment, the case has been described above in which the rotation of the drive boob is counterclockwise when the drive device 5 is viewed from the drive pulley 10 side. However, by design,
Due to the arrangement of the drive device 5 or the setting of the rotation direction of the rotating brush 3, if the rotation of the drive boo is clockwise when looking at the drive device 5 from the drive pulley 10 side, the drive pulley 10 A spiral groove may be carved in the outer circumferential surface 10a of the screw in the same direction as the right-hand thread. With this configuration, the wound thread waste 9 is moved to the side opposite to the drive device 5 and removed in the same manner as described above. FIG. 3(a) shows a second embodiment of the present invention, and particularly specifically shows the structure of claim 3. The relationship between the rotational direction of the drive pulley 1000 and the direction of the spiral groove 11 and the basic principle are the same as in the first embodiment, so a description thereof will be omitted. As illustrated, the drive pulley 100 is
The diameter on the drive device 5 side is large and the diameter on the opposite side is small.
It has the shape of a so-called truncated cone, and a spiral groove 11 is carved on the circumferential surface of this truncated cone. As in the first embodiment, the wrapped thread is removed by moving it to the opposite side of the drive device, but unlike the case where the drive pulley 100 is cylindrical as in the first embodiment, the thread waste is removed. With the movement, the diameter of the drive pulley 100 around which the thread waste is wound becomes smaller, so the frictional force between the drive pulley 100 and the thread waste becomes weaker, and the thread waste can be moved and removed very easily.

However, since the belt 7 has the characteristic of easily moving toward the pulley with a larger diameter, if the drive pulley 100 axis and the rotation axis of the driven rotating brush 3 are arranged parallel to each other, the belt 7 will move toward the drive pulley 100 side. It may move to the larger diameter side and eventually come off to the rotating shaft 5a side, which is inconvenient. As shown in FIG. 3(b), the angle β between the axis of the drive boot 100 and the axis of rotation of the rotary brush 3 is appropriately selected according to the cone angle α of the drive pulley 100, and the belt is corrected. It has been devised to be placed in the correct position.

4 and 5 further show another embodiment according to the present invention, in which a drive pulley 101 is provided with a flange 102 having a diameter larger than the maximum diameter of the drive pulley 101 at the end on the drive device 5 side. It is being The purpose of providing the flange 102 is that the yarn waste carried by the belt is removed from the drive pulley 1.
01, one end of the thread waste is prevented from wrapping around the rotating shaft 5a and hindering the movement and removal of the thread waste. Another meaning is that in the unlikely event that the belt
If the belt comes off to the side, there is a risk of damage to the belt, so this should be prevented.

Similarly, on the rotating brush 3 side, a spiral groove 2 is formed on the driven pulley 20 provided at the shaft end or at an arbitrary position between both shaft ends.
1 can be engraved. FIG. 6 shows a rotating brush 3 equipped with a driven pulley 20 with a spiral groove 21 carved in the center, and FIG. 7 shows a rotating brush 3 equipped with the driven pulley 20 at the shaft side end. . Note that in these embodiments, a blade 22 is provided instead of the brush bristles 2. As in the case of the drive pulley 10, thread waste wrapped around the pulley can be removed.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Thread debris wrapped around the pulley is ejected from between the pulley and drive belt along the direction in which the spiral groove carved on the outer circumferential surface of the pulley rotates, and is reliably removed, making it easy to clean. It improves efficiency and eliminates the need for maintenance.

Further, by providing a flange on the end face of the pulley on the driving device side, it is possible to prevent thread waste from being entangled around the rotating shaft.

[Brief explanation of the drawing]

FIG. 1 is a partially cross-sectional schematic perspective view showing a first embodiment of the present invention, FIGS. b) (C) is a schematic perspective view of the main part showing the operating state, FIGS. 3(a) and 3(b) show the second embodiment, (a) is a schematic perspective view of the main part, and (a) is a schematic perspective view of the main part. The explanatory drawings and FIGS. 4 to 7 are explanatory drawings showing other embodiments, respectively, and FIG. 8 is a partially sectional schematic side view showing a conventional suction port. Symbol 1... Suction port body 2... Brush bristles 4... Driven pulley 5a... Rotating shaft 7... Drive belt 9... Thread waste 10a... Contact surface 20... Driven pulley 22...Blade

Claims (1)

[Claims] 1. Suction cleaning equipped with a rotating brush driven by a belt stretched between a driving pulley fixed to a rotating shaft of a drive device and a driven pulley fixed to a rotating brush. A suction vacuum cleaner in which a spiral groove is carved on the outer peripheral surface of both or one of the drive pulley and the driven pulley. 2. The driving pulley is fixed to the rotating shaft of the driving device at one side end, and the spiral groove on the outer peripheral surface of the driving pulley is such that the rotating direction of the rotating shaft is clockwise when viewed from the pulley side. 2. The suction vacuum cleaner according to claim 1, wherein the thread is carved in the same twisting direction as a right-hand thread, and the thread is carved in the same twisting direction as a left-hand thread when the thread is counterclockwise. 3. The suction cleaner according to claim 1 or 2, wherein the drive pulley has a truncated cone shape with a diameter larger on the drive device side than the other end. 4. The suction vacuum cleaner according to claim 1, wherein a flange having a diameter larger than the maximum diameter of the drive pulley is provided at the end of the drive pulley on the drive device side. .