JPH0324770Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a slurry transfer device used in a concrete placing device, a sludge distribution device, etc.

(Prior Art) The applicant has developed a concrete pressure conveying hose,
a rotatable first drum that winds up or unwinds the pouring point side of the hose near the tip; a rotatable second drum that winds up or unwinds the concrete supply source side of the hose near the root; and the first drum. We have already proposed a concrete pouring device that consists of a retractable boom that supports the distal end of a hose extending from the hose, and that supports each of the above parts in a rotatable manner (if necessary, see Utility Model Application No. 59-93686 (Utility Model Application No. No. 9456) (see specification).

(Problems to be solved by the invention) In the above-mentioned concrete placing device, when the hose for concrete pressure feeding is wound around the first drum or when the hose is fed out from the first drum, the hose on the first drum is Since the winding height of the hose changes, if the height position of the guide roller that supports the hose near the first drum is kept constant, the hose will be rubbed and damaged early, and the first drum requires a large driving torque to rotate.

The present invention addresses the above-mentioned problems, and includes a slurry pumping hose, a rotatable first drum that winds up or unwinds the side of the hose near the tip, and a rotatable first drum that winds up or unwinds the side of the hose near the root. a rotatable second drum for winding or unwinding;
In the slurry transfer device, the slurry transfer device includes a telescoping boom that supports the distal end side of the hose extending from the drum, and supports each of the parts in a rotatable manner, in which the hose extending from the first drum is supported in the vicinity of the first drum. A slurry transfer device comprising a guide roller and an elevating drive device that moves the guide roller up and down to match the lifting height of the guide roller with the winding height of the first drum, The purpose is to prevent damage to the slurry pumping hose as much as possible. Another object of the present invention is to provide an improved slurry transfer device that can reduce the driving torque required to rotate the first drum.

(Means for Solving the Problems) As described above, the present invention includes a slurry pressure feeding hose, a rotatable first drum that winds up or unwinds the side near the tip of the hose, and a slurry pump near the base of the hose. A slurry transfer device comprising a rotatable second drum that winds up or lets out a supply source side, and a telescopic boom that supports a distal end side of a hose extending from the first drum, and supporting each of the parts in a rotatable manner, a guide roller that supports the hose extending from the first drum near the first drum; and a guide roller that is raised and lowered to match the lifting height of the guide roller with the winding height of the first drum. Since the lifting height of the guide roller matches the winding height of the first drum, rubbing of the slurry pumping hose is eliminated and damage to the hose is prevented as much as possible. In addition, the driving torque required to rotate the first drum is reduced.

(Example) Next, the slurry transfer device of the present invention will be explained with reference to an example shown in FIGS. 1 to 4 in which the slurry transfer device of the present invention is applied to a concrete pouring device. Cases 2a and 2b are boom bodies that are extended and contracted by the cylinder 1,
The boom case 2 is rotatably attached to the skid 4 via a swing bearing 3, and when the swing motor 5 is driven, the boom case 2 can be turned horizontally to any desired position. Reference numeral 6 denotes a first winding drum for winding and unwinding a rubber hose 8 for pumping concrete on the side of the pouring site, and is mounted on the boom case 2 via a winding bearing 7. 9 is the winding drum 6
A winding motor drives the rubber hose 8 for pumping concrete onto the winding drum 6 at a constant tension, and a second winding motor 10 winds up and unwinds the rubber hose 12 for pumping concrete on the concrete supply source side. The winding drum is mounted on the boom case 2 via a winding bearing 11. Further, reference numeral 13 denotes a winding motor that drives the winding drum 10 and constantly winds up the concrete pressure feeding rubber hose 12 on the winding drum 10 with a constant tension. means an S-shaped steel transport pipe 14 having a rotating joint (transport pipe joint, etc.) 18.
(See Figure 2). The boom is composed of a boom case 2 and boom bodies 2a and 2b, and a rubber hose 8 for pumping concrete is supported on a roller 19 attached to the boom. The concrete pumping rubber hose 8 is pulled out, and the concrete pumping rubber hose 8 is wound around the first winding drum 6 by operating the telescoping boom in the retracting direction. At this time, the concrete pressure feeding rubber hose 8 is supported by the guide rollers 20 and is let out or wound up. In addition, the telescopic force of the telescopic boom 2 and the winding force of the first winding drum 6 are adjusted so that when the boom 2 is extended or contracted, the concrete pumping rubber hose 8 is not sagged (it is given a constant tension). ) has been set. 17 is a hose guide that supports the tip of the rubber hose 8 for pumping concrete. In addition, the rubber hose 12 for pumping concrete,
Second winding drum 10 and transport pipe 15 outside the device
(on the concrete supply source side), it is pulled and balanced by the second take-up motor 13 to prevent slack from occurring. Reference numeral 16 denotes a power unit that drives each part of the concrete placing apparatus, and in the case of hydraulic power, it is comprised of an oil tank, an electric motor, a hydraulic pump, etc. Also, hose guide 17
is attached to the boom 2b with a pin so that the attachment angle can be changed. Further, the rubber hose 12 for pumping concrete is guided by a guide roller 21, and is wound around the winding drum 12 or unwound from the winding drum 12.

Next, the guide roller 20 that is the most distinctive feature of this invention
The elevating and lowering drive device will be explained in detail with reference to FIGS. 3 and 4. 16a is concrete placing device 16
frame, 30 and 31 are support arms fixed to the frame 16a, and 32 is the support arms 30 and 3.
This is a screw shaft rotatably supported by 1. Note that if the spiral groove for hose support provided on the outer peripheral surface of the first winding drum 6 is a left-handed spiral groove, the screw shaft 3
The second screw is also a left-hand thread. Further, numeral 33 denotes a guide roller support cylinder screwed onto the threaded shaft 32, and the guide roller 20 is attached to the support cylinder 33. Further, 33a is a support tube rotation prevention piece fixed to the support tube 33, 37 is a support tube rotation prevention rod that slidably passes through the hole of the rotation prevention piece 33a, and the upper and lower ends of the prevention rod 37 are the support tubes. It is fixed to arms 30 and 31. Further, 34 is a sprocket fixed to the lower end of the screw shaft 32, 9a is a drive gear fixed to the output shaft of the winding motor 9, and 6a is an internal tooth provided on the inner peripheral surface of the first winding drum 6. The internal gear 6a meshes with the drive gear 9a. Further, 36 is a sprocket fixed to the output shaft of the winding motor 9, and 35 is the sprocket 3.
A chain suspended between the first winding drum 6 and the sprocket 34 controls the rotation of the winding motor 9 to rotate the first winding drum 6 in the winding direction or the unwinding direction via the drive gear 9a and the internal gear 6a. In addition, the rotation of the take-up motor 9 is transmitted to the threaded shaft 32 via the sprocket 36 → chain 35 → sprocket 34, and the threaded shaft 32 is rotated to raise or lower the guide roller support tube 33 and the guide roller 20. It's becoming like that.

(Function) Next, the function of the concrete placing device will be explained. Fresh concrete pumped from a concrete pump (not shown) is transported through a transport pipe 15 → a rubber hose for pumping concrete 12 → an S-shaped steel transport pipe 14 →
It passes through a rubber hose 8 for pumping concrete and is discharged from the tip of the hose 8 to a predetermined position. At this time, by letting out the rubber hose 8 for pumping concrete, concrete can naturally be poured into deep grooves (see Fig. 1). Furthermore, by slightly changing the mounting angle of the hose guide 17, it is also possible to discharge in the horizontal direction. Also, the boom main bodies 2a, 2
b, the first winding drum 6 is rotated, and if necessary, the winding drum 10 is rotated to wind up and unwind the concrete pumping rubber hoses 8, 12. By rotating the swing bearing 3, the tip of the rubber hose 8 for pumping concrete can be moved to any position, making it possible to cast concrete in the entire surrounding area of the concrete casting device.

As mentioned above, the winding motor 9 is driven in accordance with the expansion and contraction of the boom bodies 2a and 2b by the boom expansion and contraction cylinder 1, and the concrete pumping hose 8 is spirally wound around the first winding drum 6. , and unwound from the same winding drum 6. Further, by raising and lowering the guide roller 20 in accordance with the winding and unwinding speed of the hose 8, damage to the hose 8 is prevented and the driving torque of the winding drum 6 is reduced. That is, the drive gear 9a is connected to the output shaft of the winding motor 9.
and a sprocket 36 are fixed, and the drive gear 9a rotates the winding drum 6 while winding up the concrete pumping rubber hose 8.
The screw shaft 32 is rotated via the sprocket 36, chain 35, and sprocket 34. Also, when the screw shaft 32 rotates, the guide roller support cylinder 33
moves upward or downward depending on the direction of rotation. Now, when the winding drum 6 having a left-handed spiral groove is rotated to the left when viewed from above, the hose 8 is unwound and its unwinding point becomes gradually higher. To rotate the winding drum 6 counterclockwise as described above, the internal gear 6 is
It is necessary to rotate the drive gear 9a to the left, and the drive gear 9a meshing with the internal gear 6a and the sprocket 36 coaxial with the drive gear 9a to the left. At this time, the sprocket 34 connected to the sprocket 36 via the chain 35 also rotates to the left, the left-handed threaded shaft 32 integrated with the sprocket 34 also rotates to the left when viewed from above, and the guide roller 20 moves upward.
The unwinding point of the hose 8 becomes higher. Here, the winding pitch of the winding drum 6 is P _a , the thread pitch of the screw shaft 32 is P _b , the number of teeth of the internal gear 6a is Z _a , the number of teeth of the drive gear 9a is Z _b , and the sprockets 36 and 34 are If the number of teeth is Z _c and Z _d respectively, the pitch of the screw is
P _b = P _a · Z _b · Z _d / Z _a · Z _c .

(Effects of the invention) As described above, the present invention includes a slurry pressure feeding hose, a rotatable first drum that winds up or unwinds the side near the tip of the hose, and a rotatable first drum that winds up or unwinds the slurry supply source side near the root of the hose. A slurry transfer device comprising a rotatable second drum for picking up or feeding out, and a telescoping boom for supporting the distal end side of a hose extending from the first drum, and supporting each part in a rotatable manner. A guide roller that supports the extended hose in the vicinity of the first drum, and an elevating drive device that moves the guide roller up and down to match the lifting height of the guide roller with the winding height of the first drum. Since the slurry pumping hose is raised and lowered and held at the unwinding point of the first drum, friction between the hose and the first winding drum is eliminated and damage to the hose is prevented as much as possible. In addition, it has the effect of reducing the driving torque required to rotate the first drum.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the slurry transfer device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view showing a guide roller lifting/lowering drive device, and Fig. 4 is a plan view thereof. It is. 2... Telescopic boom, 6... First drum, 10...
...Second drum, 8, 12...Hose for pumping slurry, 20...Guide roller, 30-36...Elevating drive device.

Claims (1)

[Scope of utility model registration request] a first rotatable drum for winding up or unwinding the side of the hose near the tip; a second rotatable drum for winding up or unwinding the slurry supply source side near the root of the hose; In the slurry transfer device, the slurry transfer device includes a telescoping boom that supports the distal end side of a hose extending from the first drum, and supports each of the portions in a rotatable manner.
a guide roller that supports the hose extending from the drum near the first drum; and a lifting drive device that moves the guide roller up and down to match the lifting height of the guide roller with the winding height of the first drum. A slurry transfer device characterized by comprising: