JP2511113B2 - Form vibration device in concrete molding machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mold vibrating device in a concrete molding machine, and more particularly, to effectively transmit a fine swing of the vibrating machine to the mold during pressure molding to make the concrete While shortening the molding time,
It is intended to suppress noise caused by vibration noise as much as possible.

(Prior Art) Conventionally, in a concrete vibration molding machine, a form vibration device is installed in the lower part of a frame, and a pressurizing device of concrete material is installed in the upper part. The formwork vibrating device is configured such that a support table for the formwork is attached to a frame via a vibration-proof material, and a pair of vibrators has rotating shafts fixed to the lower surface of the support table and a pair of reverse rotating units fixed to the bottom of the frame. A belt is stretched around the shaft of the motor, and the concrete material put into the form is vibrated by a vibrating machine, and further pressed by a pressure plate in a pressure device to compact the material in a short time. To do.

(Problems to be solved by the invention) The vibration isolator in the conventional concrete molding machine described above needs to reliably transmit the fine swing of the vibrator to the mold in a state of being sunk by the pressing force of the pressure plate. For that purpose, it is desirable that the vibration damping material is flexible. This is clear from the experimental examples below.

Now, a vibration-proof rubber with a diameter of 100 mm and a height of 50 mm is 700 kg from above.
When the load was applied, a strain of 3.5 mm was generated. That is 1 kg
This means that a strain of 0.005 mm was generated for each load. On the other hand, a cylindrical body with an outer diameter of 90 mm, an inner diameter of 57 mm, and a height of 225 mm,
Anti-vibration rubber with coil spring inserted is 100 kg from above
When a load of 1 was applied, a strain of 20 mm occurred. That is, 1K
This means that a strain of 0.2 mm was generated for a load of g. Therefore, the former is held by the anti-vibration rubber to the top and bottom of the form, and a load of 100 kg is applied from above by the pressure plate, and the vibration amplitude of the vibrator is 0.5 mm.
Assuming that, to move the formwork upward 0.5 mm,
The upper anti-vibration rubber will receive a force of 100 Kg from the bottom to cause a 0.5 mm distortion or push the pressure plate upward. Also, at this time, the lower anti-vibration rubber moves the mold frame upward by 0,5 mm, so to maintain the amplitude of 0,5 mm, the anti-vibration rubber of 0,495 mm is extended upward. That means
This power becomes 99Kg. Similarly, holding the upper and lower sides of the formwork by the latter's anti-vibration rubber and applying a load of 100 kg from the upper side with a pressure plate, assuming that the vibration amplitude of the vibrator is 0,5 mm,
When the mold moves upward by 0.5 mm, the upper anti-vibration rubber receives a force of 2,5 Kg from the bottom, which causes a 0.5 mm distortion or pushes the pressure platen upward. At this time, the lower anti-vibration rubber tries to move the formwork upward by 0.5 mm, so
In order to maintain a swing of 0,5 mm, it is pushed up by a vibration-proof rubber by 0,3 mm, and this force becomes 1,5 Kg. In short, the soft vibration-proof rubber can transfer the fine vibration width of the vibrator to the mold properly with a smaller load.

However, when the motor shaft and the shaft of the vibrator are connected by a belt, when the contraction amount of the vibration isolator, that is, the descending amount is large,
Since the belt tension is different, the belt is easily damaged,
In addition, there is a drawback that the vibrations of both vibrators become out of sync with each other and cause a growl. In order to eliminate this drawback, a solid vibration-proof material may be used, but in this case, the vibration-proof effect is reduced and vibration is transmitted to the frame side, so the compaction time of the concrete material becomes longer. Also, there was a drawback that noise was generated from the frame.

Further, when fixing the pair of motors to the lower part of the frame, the concrete material cut and removed from the frame adheres to the motor and the belt, which is troublesome to clean.

(Means for Solving the Problems) In order to solve such a problem, the present invention provides a drive device for a vibrator supported by a frame through an elastic vibration isolator, which has a weightless drive device. In this state, the vibrator and the driving device are connected to each other by a flexible member so that the movement of the vibrator is transmitted to the driving device. The transmission shaft of the drive device is connected by a flexible shaft.

(Operation) The mold is integrally clamped and held on the vibrator, and while the vibrator vibrates the mold vertically up and down, concrete material is put into the mold and the upper surface is pressed by the pressure plate.
Although the concrete material is rapidly compacted by vibration, the drive unit also moves following the movement of the vibrator during molding, and the flexible shaft can be rotated smoothly. By increasing the width, it is possible to reliably transmit the microvibration by the vibrator to the mold, and to block the transmission of the vibration to the frame side, and to reduce the noise as much as possible.

(Embodiment) Next, one embodiment of the present invention will be described with reference to the drawings.
Is a frame in a concrete molding machine, which is provided with a pressure plate 2 at the upper part, a vibration device 4 of a form 3 at the lower part, and a drive device 5 behind it. The vibration device 4 of the mold 3 is
Elastic vibration-damping materials 7 are provided at four corners of a support frame 6 integrally projecting from the front side of the frame 1, and a base 8 is installed on the elastic vibration-damping material 7, and the base 8 is rotated in opposite directions to each other. A pair of left and right vibrators 9 are fixed. The base 8 has
A pair of left and right air cylinders 10 for tightly holding the mold 3 are vertically mounted on the upper surface thereof, and a head 12 of a piston rod 11 thereof is projected upwardly and downwardly on a base 8. Further, the drive device 5 suspends a weight 15 by a chain 14 at the rear ends of a pair of left and right ladle 13 whose center portion is axially attached to the frame 1, and horizontally suspends a base 17 by a chain 16 at the front end.
A pair of left and right motors 18 are attached to this base 17. Lateral bearings 19 and 20 are coaxially opposed from the base 8 and the base 17, and are horizontally fitted to both ends of a flexible member 21 made of a rubber tube for transmitting the movement of the vibrator 9 to the drive unit 5. are doing. In addition, a pair of left and right transmission shafts supported horizontally on the base 17
A belt 24 is stretched around the rear end of the motor 22 and the shaft 23 of the motor 18,
The front end of 22 and the rotary shaft 25 of the vibrator 9 are coaxially opposed to each other and are connected by a flexible shaft 26 made of rubber.

Since one embodiment of the present invention has the above-mentioned structure, the mold 3 is placed on the base 8 of the vibrator 9 and formed on the lower surface of the mold 3 as shown by the chain line in FIG. After the head 12 at the upper end of the piston rod 11 is fitted in the connecting groove 27 and the piston rod 11 is lowered to hold the mold 3 tightly on the base 8,
When the vibrator 9 is started by the motor 18 and the concrete material 28 is put into the mold 3 and the pressurizing plate 2 is lowered by the air cylinder (not shown) and pressed from the surface of the concrete material 28, the load is applied. The base 8 descends and compresses the elastic vibration isolator 7. On the other hand, since the base 17 is suspended by the weight 15 in a weightless state, it moves up and down with an extremely small force. Therefore, the base 17 descends together with the base 8 connected by the flexible member 21, and the horizontal state of the flexible shaft 26 is maintained.

In the above-described embodiment, the vibrator 9 is attached to the base 8 supported by the elastic vibration isolator 7, but in order to effectively transmit the fine swing of the vibrator 9 to the mold 3, In some cases, the vibrator 9 is directly attached to the mold 3, and the form 3 is supported by the elastic vibration isolator 7.

(Effects) The form vibration device according to the present invention keeps the flexible shaft horizontal even if the elastic vibration isolator contracts due to pressure from above and the vibrator descends. The vibration can be reliably transmitted to the vibrator, and the flexible shaft does not bend to cause barking or damage. Moreover, since a soft elastic vibration isolator can be used, the fine amplitude of the vibrator is transmitted to the mold without waste during molding, which can shorten the molding time and prevent the vibration from being transmitted to the frame. Since it is blocked, the vibration noise can be reduced as much as possible.
Further, in the case of the present invention, since the drive device can be separated from the vibrator rearward, there is an advantage that the concrete material does not adhere to the drive device and therefore the cleaning operation is facilitated.

[Brief description of drawings]

FIG. 1 is a longitudinal side view showing an embodiment of the present invention, FIG. 2 is a plan view of a vibrating device according to the above embodiment, and FIG. 3 is a rear view of a drive device according to the above embodiment, 1: frame, 2: Pressure board 3: Form, 4: Vibration device 5: Drive device, 6: Support frame 7: Elastic vibration isolation material, 8: Base 9: Vibration device, 10: Air cylinder 13: Hammer, 15: Weight 17: Base , 18: Motor 21: Flexible material, 22: Transmission shaft 25: Rotation shaft, 26: Flexible shaft

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A vibrator, which is supported by a frame so as to be able to move up and down via an elastic vibration-proof material, and a drive device, which is suspended in the frame in a weightless state, are connected by a flexible material and coaxially. A form vibrating device in a concrete molding machine, characterized in that a rotating shaft of a vibrating device and a transmission shaft of a driving device which are opposed to each other are connected by a flexible shaft.