JP3087475B2 - Vibrating drum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating drum suitable for use in, for example, mixing, drying and cooling of bulk materials, and particularly suitable for separating sand from castings.

[0002]

2. Description of the Related Art Recently, the present applicant has proposed various structures for a vibration drum having a circular vibrating force generator attached to a peripheral wall portion of a drum body supported on the ground by a vibration isolating coil spring. Has been proposed. Each of these uses a vibration-preventing coil spring. As shown in FIG. 5, a part of the vibration-prevention coil spring is provided between the drum main body 1 and the spring support 3 supported on the ground. A vibration coil spring 7 is provided. In this, a mounting block 2 is mounted on the bottom surface of a drum main body 1, and a mounting block 4 is mounted on a support 3 in the same manner as opposed to the mounting block 2, and a cylindrical body 5 as a support member of a vibration isolating coil spring 7 is mounted on these. , 6 are mounted in alignment. A coil spring 7 for vibration isolation is supported by these in a compressed state. Although not shown, when the circular exciting force generator attached to the peripheral wall of the drum main body 1 is driven, various modes of elliptical vibration are performed on the circumference in a plane perpendicular to the axis of the drum main body. The loose material in 1, for example the casting material to be sanded, has a stirring and circulating movement over a certain angular range around the axis. With this, predetermined processing, for example, for castings to be sanded,
Cooling of the casting and sand removal, which is the main function, are performed. When the drive of the circular exciting force generator is started and stopped, the total weight of the drum body 1 and the coil spring for such vibration isolation are mainly used. 7 are usually disposed at least four positions in front and rear and left and right, but the resonance frequency determined by these spring constants is
The upper and lower ends of the vibration isolating coil spring collide with the cylinders 5 and 6 to generate rattling noise. . This can be quite loud and cause noise to nearby residents.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a vibrating drum capable of eliminating noise, which causes the above-mentioned pollution.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide a structure in which a peripheral wall of a drum body supported on the ground by a vibration isolating coil spring is provided.
In a vibration drum to which an excitation force generator is attached, a rectangle having two upper and lower sides extending at least along the axis of the drum main body between a pair of support members for supporting upper and lower ends of the vibration isolating coil spring. This is achieved by a vibrating drum to which a plate-shaped rubber plate or a leaf spring is attached.

[0005]

When the driving of the vibrating drum is started and stopped, the drum body swings greatly. At this time, the drum body is stretched between a pair of supporting members for supporting the upper and lower ends of the vibration isolating coil spring. The rectangular plate rubber or plate spring has a small bending strength along an axis extending in the vertical direction, but has a sufficiently large bending strength in a direction perpendicular thereto, so that vibration in this direction can be suppressed. Therefore, it is possible to prevent the vibration-preventing coil spring from colliding with the support member and generating a rattling noise.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vibration drum according to an embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show the entirety of a vibrating drum according to an embodiment of the present invention. The vibrating drum is indicated generally by 10 and has a cylindrical drum body 12 at the right end in FIG. An inlet Q for bulk material is formed in the wall, and an outlet 16 for discharging the processed material is formed in the left end. The drum main body 12 is disposed so as to be inclined downward as a whole in the material transfer direction. Also, coil springs 20a, 20 are supported on spring support blocks 18a, 18b, 19a, 19b disposed on the ground in front, rear, left and right, and disposed in pairs.
a, 20b, 20b, 21a, 21a, 21b, 21b
Is supported. This upper end is a pair of front and rear left and right spring support plates 24a attached to the peripheral wall of the drum body 12,
It is supported by 24b, 25a, 25b. 14
A and 14B are observation rooms.

The details of these support portions are shown in FIG. 3, but a vibration-proof spring support block 30 attached to the drum body 12 or a spring support block 32 attached to the column side.
Further, spring supporting members 34 and 36 similar to the conventional one are attached to these. The spring support members 34, 36
A vibration isolating coil spring 38 which is in a compressed state by receiving the entire weight of the drum main body 12 is disposed therebetween. Further, according to the present invention, as shown in FIGS. 1 and 2, plate rubbers 40 whose upper and lower sides extend along the axial direction of the drum main body 12 are provided on the spring support blocks 30 and 32, respectively. Are attached by bolts 42, 42, which are rectangular as a whole. In the present embodiment, the central portion has a curved shape. Such a plate rubber 40 is shown in FIG.
As shown in the figure, all the vibration isolating coil springs 20a, 20a,
It is similarly attached to 20b, 20b, 21a, 21a, 21b, 21b.

Next, the vibration exciter 50 according to the present embodiment will be described. In this embodiment, an electric motor 52 is attached to the peripheral wall of the drum body 12 near the left end in FIG. The unbalanced weights 54, which are aligned in the axial direction
55, 56, and 57 are supported by shafts 70 and 72 rotatably supported by bearings 60 supported by ribs R attached to the drum body 12, respectively. In the central part, a support shaft 70 is provided by an intermediate universal joint 80,
72 are connected.

The embodiment of the present invention is constructed as described above. Next, this operation will be described.

When the motor 52 is driven, the unbalance
The weights 54, 55, 56, and 57 rotate, and the resultant centrifugal force causes the drum body 12 to vibrate in various elliptical modes on a circumference around its axis. The material is agitated and circulated, undergoes a predetermined process, and is discharged to the outside through the discharge port 16. When the driving of the vibrating drum 12 is started, the entire vibrating drum 10 swings greatly as is well known. However, at this time, according to the present invention, since the plate rubber 40 is easily bent in the vertical direction, each of the coil springs 20a, 20b,
21a and 21b do not hinder the vibration damping action, but the vibration in the horizontal direction with respect to the vertical direction, particularly the shaking in the axial direction, is effectively suppressed by the plate rubber 40. The upper and lower ends of the spring 38 collide with the spring support members 34 and 36 to eliminate the rattling noise. Therefore, noise, which has conventionally been a problem, is prevented.

Although the embodiment of the present invention has been described above, the present invention is, of course, not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the plate rubber 40 is attached only to one side of the vibration isolating coil springs 20a, 20b, 21a, 21b. The rubber 40 may be attached. Alternatively, instead of the plate rubber 40, a plate spring 90
May be attached as shown in FIG. In this modification,
A leaf spring 91 having a similar shape is attached to the front with respect to the transfer direction of the vibration isolating coil spring 38. It is not clear that such a configuration also has the same effect as the above embodiment.

In the above embodiment, the circular vibrating force generator 50 is attached to the drum main body 12, but a pair of vibrating electric motors are mounted instead, and the linear vibrating force is applied to the drum main body 1.
The present invention is also applicable to a vibrating drum configured to be added to 2.

[0015]

As described above, according to the vibrating drum of the present invention, the drum main body swings largely at the start of driving and at the stop of driving, but at this time, no noise causing pollution is generated in the surroundings. .

[Brief description of the drawings]

FIG. 1 is a side view of a vibration drum according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged sectional view of a main part of the vibration drum.

FIG. 4 is an enlarged cross-sectional view of the main part of a modified example.

FIG. 5 is an enlarged sectional view of a main part of a conventional vibration drum.

[Explanation of symbols]

 40 leaf rubber 90 leaf spring 91 leaf spring

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-69109 (JP, A) JP-A-5-15965 (JP, A) JP-A-4-371362 (JP, A) 327359 (JP, A) JP-A-4-210864 (JP, A) JP-A-3-193262 (JP, A) JP-A-3-189067 (JP, A) JP-A-63-268555 (JP, A) JP-A-61-150768 (JP, A) JP-A 4-453 (JP, U) JP-A-55-119378 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 29/00 F16F 15/04 F16F 15/06

Claims (1)

(57) [Claims] 1. A vibrating drum having a vibrating force generator attached to a peripheral wall portion of a drum body supported on the ground by a vibration isolating coil spring for supporting upper and lower ends of the vibration isolating coil spring. A vibrating drum having a rectangular plate rubber or a plate spring having at least two upper and lower sides extending at least along the axis of the drum body between a pair of support members.