JPH0441883B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for pushing out and ejecting concrete cylindrical bodies, and in particular, a device that automatically moves a pressing tool according to the diameter of the formwork (or product). This invention relates to a push-out type device that can be expanded.

[Problems to be solved by conventional technology and invention]

Conventionally, this type of concrete cylindrical push-out molding equipment has combined a hydraulic jack, a pressing tool, and an engaging pawl, but since the diameters of the concrete cylindrical forms vary, the tip of the jack has to be adjusted each time. The pressing tool had been replaced. Furthermore, after moving the hydraulic jack up and down using the lifting mechanism provided on the trolley and adjusting the center height between the formwork and the jack, the engaging claw is hooked onto the end plate of the formwork, and the cylinder rod is moved by operating the push button switch. The concrete cylindrical body was being pushed out and removed by going in and out back and forth. Moreover, since the above operations were performed manually, there was a drawback that a lot of labor was required and the cost was high. Therefore, technical problems arise that must be solved in order to overcome these deficiencies.

[Means for solving problems]

This invention was proposed in view of the above-mentioned problems and as a solution to this problem, and is based on a concrete cylindrical push-out type device in which a pressing tool is provided at the tip of a jack driven by hydraulic pressure or the like. A shaft is passed through the inside of the jack coaxially with the cylinder rod, a bearing gear is fitted near the tip of the shaft protruding from the front surface of the bearing, and a plurality of cam gears are meshed with the outside of the bearing gear to secure the bearing. support to,
An arm is connected to the tip of the cam gear to form a pressing tool, and the shaft is rotated via a rack and pinion gear by a lifting drive based on a detection value of an external sensor of a lifting mechanism provided on the truck; The pressing tool is formed to be expandable according to the diameter of the formwork, and the cylinder rod of the jack is formed to be able to move in and out according to a command from a control unit based on a detected value from an external sensor. The purpose of this invention is to provide a device for pushing out and removing concrete cylindrical bodies.

[Effect]

This invention provides that when the hydraulic jack is raised and lowered by the lifting mechanism provided on the cart to adjust the center height with respect to the formwork, the lifting mechanism of the hydraulic jack penetrates the inside of the hydraulic jack via the rack and pinion gear. Rotate the shaft. A plurality of cam gears meshing with bearing gears are provided at the tip of the shaft, and the cam gears can be expanded by rotating the shaft. Accordingly, following the lifting and lowering operation of the hydraulic jack, the pressing tool is expanded to match the diameter of the formwork and adapted to the formwork. Thereafter, the cylinder rod of the hydraulic jack is pushed out in response to a command from the control unit based on the detected value of the external sensor, and the engagement claw is hooked onto the end flange of the formwork to apply the pressing reaction force to the formwork. Then, the concrete cylindrical body is pushed in by a predetermined dimension so that it protrudes from one end of the mold, thereby facilitating demolding in the next step. A hydraulic pressure change at the end of the stroke of the cylinder rod is detected by a hydraulic sensor, and the cylinder rod of the hydraulic jack is retracted in response to a command from the control section, and the engaging pawl is removed from the end flange of the formwork. The punched concrete cylindrical formwork is then transported to the next step by appropriate means, and a new concrete cylindrical formwork is transferred to this apparatus. In this way, it becomes possible to automatically perform the pushing/extracting operation of the concrete cylindrical body in conjunction with the operation of the cart.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the attached drawings. For convenience of explanation, conventionally known configurations will also be explained at the same time.

1 to 3, a cone cam 3 having a tapered portion 3a is pivotally mounted to a cylinder rod 2 of a hydraulic jack 1, and a bearing 4 is pivotally installed in front of the cone cam 3.
Inside this hydraulic jack 1 is a cylinder rod 2.
A shaft 5 is passed through the shaft 5 coaxially with the shaft 5 , and a bearing gear 6 is fitted near the tip of the shaft 5 that protrudes from the front surface of the bearing 4 . Incidentally, the bearing gear 6 may be directly fitted to the tip of the cylinder rod 2, but the invention is not limited to this. Further, the rear end of the shaft 5 is made to protrude from the rear end of the hydraulic jack 1, and the pinion gear 7 is fitted thereto.Furthermore, a rack gear 10 is fixed to a pillar 9 erected on the truck 8. The rack gear 10 and the pinion gear 7 are kept in mesh. Then, brackets 11 and 12 are fixedly installed on both sides of the hydraulic jack 1 at approximately the center thereof, and an appropriate number of rollers 13 and 13 are attached to the brackets 11 and 12, respectively.
is rotatably pivoted, and the lifting guide column 14 erected on the trolley 8 is held between the rollers 13, 13, . . . from both sides, so that the hydraulic jack 1 moves along the lifting guide column 14. Formed so that it can be moved up and down. In addition, the lifting guide column 1
As will be described later, the hydraulic jack 4 is installed diagonally with different heights on the left and right, so that the hydraulic jack 1 moves diagonally up and down in the front view of FIG. Moreover, the shaft 5
A pressing head 15 is fitted to the tip, a plurality of cam gears 16, 16, 16 are meshed with the outer side of the bearing gear 6 at equal intervals, and each cam gear 16 is connected between the bearing 4 and the pressing head 15 with a pin 17. be pivoted to. If the linear bearing gear 6 is fitted to the tip of the cylinder rod 2 as described above, the plurality of cam gears 16, 16, 16 may be meshed with the outside of the bearing gear 6. An arm 16a is connected to the tip of the cam gear 16, and a part of the arm 16a is bored forward to form a pressing tool 16b so as to be flush with the pressing head 15. Further, an appropriate number of engagement arms 18 are provided on the outer surface of the hydraulic jack 1.
18... is pivotally supported so as to be freely expandable, and an engaging claw 18a is connected to the inside of the tip of the engaging arm 18, and a cam claw 1 is provided near the pivot portion 18b of the engaging arm 18.
8c is provided, and a spring 19 is interposed so that the engagement arm 18 is always biased inward.

4 and 5, the form rolling tire 22 is stopped by the stopper 21 provided in the form rolling groove 20, and the form rolling tire 22 is stopped. A formwork 23 is fitted into the center of 22. The diameter of the formwork rolling tire 22 varies depending on the diameter of the formwork 23, and an ultrasonic sensor 24 provided just before the stop position by the stopper 21
The diameter of the rolling formwork tire 22 is detected. And the ultrasonic sensor 24
In response to a command from a control unit (not shown) based on the detected value, the lifting mechanism 25 of the cart 8 is driven, and the hydraulic jack 1 is moved up and down to adjust the center height between the formwork 23 and the hydraulic jack 1. Automatically adjust. For example, when the hydraulic jack 1 is raised to adjust the center height, the pinion gear 7 at the rear of the hydraulic jack 1 is set to the rack gear 1.
0, it moves up while rotating counterclockwise in FIG. 3. Accordingly, in FIG. 2, the bearing gear 6 rotates clockwise, and the cam gears 16, 16, 16 meshed with the bearing gear 6 rotate counterclockwise, respectively, to rotate the arms 16a, 16a, 16a. expands. The expansion angle of the arm 16a is matched to the diameter of the formwork 23, and depends on the lifting distance of the hydraulic jack 1 by the lifting mechanism 25, the ratio of the number of teeth between the rack gear 10 and the pinion gear 7, and the ratio between the bearing gear 6 and the cam gear 16. It is formed by appropriately combining the ratio of the number of teeth, etc. The sensor 26 attached to the side surface of the formwork rolling groove 20 detects the formwork rolling tire 2.
The control unit determines that the carriage 2 is at the stop position and drives the traveling mechanism 27 of the carriage 8 to move the carriage 8 forward. A proximity sensor 28 is provided at the tip of the truck 8, and this proximity sensor 28 detects the end flange 23a of the formwork 23, and stops the traveling mechanism 27 of the truck 8 according to a command from the control section, and also stops the traveling mechanism 27 of the truck 8. The hydraulic valve (not shown) of the unit is opened and the cylinder rod 2 of the hydraulic cylinder 1 is pushed out. Then, in FIG. 1, the cone cam 3 moves forward as the cylinder rod 2 moves forward, and the cam pawl 18c of the engaging arm 18, which is urged inward by the spring 19, moves the tapered portion 3a of the cone cam 3. pulled inward by Therefore, following the advance of the cylinder rod 2, the engaging arm 1
8, 18, . . . are closed inwardly, and the engaging claws 18a abut against the back surface of the end flange 23a of the handle frame 23.
Then, as shown in FIG. 4, the pressing tool 16b is brought into contact with the end plate 23b of the concrete cylindrical body 30 within the formwork 23. Further, when the cylinder rod 2 is moved forward, the engaging pawl 18a engages with the formwork 2.
Lock the end flange 23a of No. 3 and press the pressing tool 16b.
is the end plate 23b of the concrete cylindrical body 30
by pressing the concrete cylinder 3 in the formwork 23.
0 is pushed in by a predetermined dimension to protrude from the rear end (not shown) of the formwork 23. Then, the hydraulic pressure change at the end of the stroke of the cylinder rod 2 is detected by the hydraulic sensor provided in the hydraulic pump unit, and the cylinder rod 2 is moved back to its original position by switching the hydraulic valve according to a command from the control section. When the cone cam 3 is moved backward, the tapered portion 3a of the cone cam 3 is moved backward, and the engagement arms 18, 18... are expanded outwardly by the opposite action to the above, and the formwork 23 is released from the lock, and the carriage 8 is The traveling mechanism 27 is driven to move the truck 8 backward. Moreover, a rail end sensor 32 provided at the rear of the truck 8
When detecting that the trolley 8 has retreated to the home position, the traveling mechanism 27 is activated by a command from the control section.
will be stopped.

In this way, the pressing/extracting operation of the mold 23 is completed, and the mold 23 is rolled to the next step. Furthermore, the second
As shown in the figure, the lifting guide column 14 is installed obliquely on the trolley 8, but this is because the formwork rolling tires 22 in FIG. The lifting guide column 14 is formed obliquely so that the center line of the formwork 23 always coincides with the center line of the hydraulic jack 1 even when the frame rolling tire 22 is set. In this embodiment, the elevating guide column 14 is provided obliquely, but the invention is not limited to this. For example, a formwork receiving roller is provided in the formwork rolling groove 20, and the formwork is mounted on the roller. It is also possible to receive the frame 23, in which case the lifting guide column 14 can also be in an upright position. Then, based on the command from the control unit based on the detected value of the external sensor,
Coupled with the operation of the trolley 8, the concrete cylinder can be automatically pushed out and removed.

〔Effect of the invention〕

In this invention, when adjusting the center height of the formwork and the hydraulic jack, the pressing tool is expanded in conjunction with the drive of the lifting mechanism provided on the truck. Therefore, by appropriately combining the gear ratio between the rack and pinion gear, the gear ratio between the bearing gear and the cam gear, etc., even if the diameter of the formwork is different, the contact part of the pressing tool can be adapted to the formwork. be able to. and,
Based on the commands from the control unit based on the detection value of the external sensor, the hydraulic jack is driven and the cylinder rod is moved in and out to push the concrete cylinder by a predetermined dimension. Combined with the operation of the trolley, it becomes possible to perform the work of pushing out and removing concrete cylindrical bodies automatically without labor.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention. Fig. 1 is a partially cutaway side view of the hydraulic jack, Fig. 2 is a partially cutaway front view of the same, Fig. 3 is a partially cutaway rear view of the rack gear, and Fig. 4 is a diagram showing the operating state of the device of the present invention. A partially cutaway side view, and FIG. 5 is a partially cutaway front view of the same. Description of symbols, 1... Hydraulic jack, 2... Cylinder rod, 4... Bearing, 5... Shaft, 6...
Bearing gear, 7...Pinion gear, 8...Dolly, 1
0...Rack gear, 16...Cam gear, 16a...
...Arm, 16b...Press tool, 23...Formwork, 2
4... Ultrasonic sensor, 25... Lifting mechanism, 26
...Sensor, 28...Proximity sensor, 30...
Concrete cylindrical body, 32...Rail end sensor.

Claims (1)

[Claims] 1. In a concrete cylindrical push-out type device in which a pressing tool is provided at the tip of a jack driven by hydraulic pressure, etc., a shaft is passed through the jack coaxially with the cylinder rod, and the shaft is protruded from the front surface of the bearing. A bearing gear is fitted near the tip of the shaft, a plurality of cam gears are meshed with the outside of the bearing gear and pivoted to the bearing, and an arm is connected to the tip of the cam gear to form a pressing tool. , the shaft is rotated via the rack and pinion gear by a lifting drive based on the detection value of an external sensor of the lifting mechanism provided on the trolley, and the pressing tool can be expanded and expanded according to the diameter of the formwork. 1. A concrete cylindrical body pushing-out type device, characterized in that the cylinder rod of the jack is formed to be able to move in and out according to a command from a control unit based on a detected value of an external sensor.