JPS6127592Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a tension pulley support device for a drum type dryer, etc., which is designed to improve assembly ease.

[Technical background of the invention]

For example, in a drum dryer, a tension pulley that comes into pressure contact with a belt for driving a rotating drum is rotatably provided at the tip end of a rotating arm, and the rotating arm is bent at its base end. The pivot portion is rotatably supported by inserting the pivot portion into a bearing hole of a support member fixed within the outer box. In this case, the rotation arm is conventionally prevented from slipping out by forming a protrusion on the pivot portion and forming a notch on the peripheral edge of the bearing hole, and aligning the protrusion with the notch. When the pivot is inserted into the bearing hole and the tension pulley comes into pressure contact with the belt to exert a tensioning action, the protrusion is misaligned with the notch and comes into contact with the periphery of the bearing hole. The configuration is as follows. Therefore, recent drum dryers are of the so-called circulation type, in which hot air discharged from the rotating drum is dehumidified by a heat exchanger without being released outside the machine, and then returned to the rotating drum again. However, in this device, the motor for driving the rotating drum is covered with a cover from the viewpoint of dehumidification.

[Problems with background technology]

In the above configuration, since the support member that supports the rotating arm is also covered by the cover, it is difficult to see the bearing hole when inserting the pivot part into the bearing hole when assembling the tension pulley. The problem is that the notch of the bearing hole has to be matched with the notch, so to speak, and the workability is extremely poor.

[Purpose of invention]

The object of the present invention is to provide a drum type that can easily align the retaining protrusion with the notch of the bearing hole when inserting and supporting the pivot portion of the rotating arm into the bearing hole, thereby improving assembly efficiency. The present invention provides a tension pulley support device for a dryer, etc.

[Summary of the idea]

The present invention is characterized in that a positioning portion is provided to set the pivot arm at a position where the protrusion for preventing slipping out and the notch coincide with each other when the pivot portion of the pivot arm is inserted into the bearing hole.

[Embodiment of the invention] An embodiment in which the invention is applied to a drum dryer will be described below with reference to the drawings. 1 is the outer box,
A rotary drum 2 is rotatably disposed inside these. Reference numeral 3 denotes a heat exchanger disposed at the lower front of the outer box 1, which has a flow path for passing outside air and a flow path for passing exhaust air from the rotating drum 2, and is located on the inlet side of the exhaust air flow path. is communicated with a clothing inlet/outlet (not shown) on the front surface of the rotating drum 2 via a duct 4, and the outlet side 3a is opened toward the inside of the outer box 1. Reference numeral 5 denotes a double-shaft motor, which is mounted and fixed on a base plate 6 provided at the inner bottom of the outer box 1. Reference numeral 7 denotes a cover that is formed continuously on the left side of the duct 4 and covers the motor 5 together with the base plate 6, which covers the shaft 5a of the motor 5.
The rear end portion protrudes from the cover 7, and a driving pulley 8 is fitted into the protruding portion. 9 is a flat belt stretched between the drive pulley 8 and the outer circumference of the rotating drum 2, which transfers the rotational force of the motor 5 to the rotating drum 2.
I am trying to communicate this to the public. Although not shown, the front end of the shaft 5a of the motor 5 protrudes into a casing provided at the front of the motor cover 7, and a fan for supplying outside air to the heat exchanger 3 is attached thereto. When an operation switch (not shown) is turned on, the rotary drum 2 is rotated by the motor 5 via the flat belt 9, and the fan for supplying outside air to the heat exchanger 3 is also rotated, and at the same time, the outer box 1 is rotated.
After the air inside is sucked in by the blower, it is heated by a heater (none of which is shown) and supplied into the rotating drum 2. After drying the material inside, it is passed through the heat exchanger 3 and returned to the outside. It is released into box 1 and circulated. Then, in the heat exchanger 3, the air that has removed moisture from the material to be dried is cooled and dehumidified by the outside air.

Now, reference numeral 10 denotes a tension pulley that constantly presses against the flat belt 9 to apply a predetermined tension to the flat belt 9. The support structure of this tension pulley 10 will be described below. That is, 11 is a rotating arm,
The upper and lower ends of this are bent at right angles in opposite directions, and the tension pulley 10 is rotatably attached to the upper bent portion 11a, and the lower bent portion rotates the rotating arm 11 itself. It is configured as a movably supporting pivot 12. Reference numerals 13 and 14 designate protrusions, which are integrally protruded from the pivot portion 12 of the rotating arm 11 at a predetermined interval in the axial direction, and whose protruding direction coincides with the length direction of the rotating arm 11. ing. On the other hand, reference numeral 15 denotes a bearing hole formed in the rear plate portion 6a of the base plate 6, and the rotational position of the rotation arm 11 (see FIG. (Indicated by the middle two-dot chain line)
A notch 16 through which the protrusion 13 of the pivot portion 12 is inserted is formed at a position apart from the pivot portion 12 . A bearing plate 17 is fixed to the inner bottom of the base plate 6, and has a through hole 18 for pivotally supporting a portion of the pivot portion 12 near the front end. Reference numeral 19 denotes an insertion tube formed in the cover 7, which projects toward the base plate 6 so as to be substantially concentric with the bearing hole 15, and contacts the base plate 6 so as to surround the bearing hole 15. 20 is cover 7
A positioning plate that is a positioning part provided on the rear end surface.
This is formed at a position where the rotating arm 11 abuts at a rotating position where the protrusion 13 of the rotating arm 11 coincides with the notch 16 of the bearing hole 15 (see solid line in FIG. 4). Reference numeral 21 denotes a tension spring, which is tensioned between the rotating arm 11 and a hook hole 22 formed in the folded portion 7a of the motor cover 7, and the tension pulley 10 presses the rotating arm 11 against the flat belt 9. It is always biased in the direction.

The procedure for assembling the above-described structure will now be described with reference to the case of assembling the tension pulley 10, which is directly related to the present invention. First, the pivot portion 12 of the rotating arm 11, which has the tension pulley 10 attached to the upper horizontal shaft portion 11a in advance, is inserted into the bearing hole 15 of the base plate 6 through the insertion cylinder portion 19 of the motor cover 7. Then, when the protrusion 13 of the pivot portion 12 contacts the peripheral edge of the bearing hole 15, the rotating arm 11 is rotated clockwise until it contacts the positioning plate 20. Then, when the rotating arm 11 comes into contact with the positioning plate 20, the retaining protrusion 13 and the notch 16 of the bearing hole 15 align, so if the pivot part 12 is pushed into the bearing hole 15 a little further, the protrusion 13 passes through the notch 16. In this state, when the rotating arm 11 is rotated counterclockwise, the pair of protrusions 13 and 14 of the pivot portion 12 will come to sandwich the peripheral portion of the bearing hole 15 and be located on both sides thereof. Rotating arm 1
1 is held in its normal position without being pushed in or pulled out any further. Thereafter, the tension spring 21 is tensioned between the rotation arm 11 and the hook hole 22 of the motor cover 7, and the assembly of the tension pulley 10 is thus completed.

[Effects of the invention] As described above, the present invention includes a positioning portion that positions the rotating arm at a rotational position where the protrusion for preventing removal provided on the pivot portion of the rotating arm and the notch of the bearing hole coincide. As a result, it is possible to easily align the retaining protrusion with the notch, which greatly facilitates the work of inserting and supporting the pivot into the bearing hole, and improves ease of assembly. A tension pulley support device for a drum dryer or the like can be provided.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a rear view of the outer box with the back plate removed, Fig. 2 is a perspective view of the main parts, Fig. 3 is an enlarged longitudinal sectional view of the same, and Fig. The figure is an enlarged rear view of the same. In the figure, 9 is a flat belt (belt), 10 is a tension pulley, 11 is a rotating arm, 12 is a pivot part,
Reference numeral 13 indicates a protrusion for preventing removal, reference numeral 15 indicates a bearing hole, reference numeral 16 indicates a notch, and reference numeral 20 indicates a positioning plate (positioning portion).

Claims (1)

[Scope of utility model registration request] A tension pulley that is in pressure contact with the belt is pivotally supported by a rotating arm whose pivot part is inserted into a bearing hole, and the pivot part is formed with a protrusion for preventing slippage, and the protrusion is attached to the pivot arm. The pivot part is rotated so that the protrusion does not match the notch part to prevent the pivot part from coming out when the pivot part passes through a notch part continuously formed on the peripheral edge of the bearing hole, and when the pivot part is inserted, the A tension pulley support device for a drum dryer, etc., characterized in that a positioning portion is provided for setting the rotating arm to a rotating position where the protrusion and the notch coincide.