JPH0644646Y2 - Core die extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a device used for extracting a core mold from a molded concrete block.

《Prior Art》 The core mold used to mold hollow holes such as box culverts and underdrain blocks is made from the block after the block is molded and its diameter is reduced by the drawing mechanism provided in the core mold itself. Pulled out. If the core mold is to be pulled vertically, the core mold can be easily removed using a crane, etc., but if it is horizontal, the core mold must be lifted slightly and then pulled out horizontally. The task is not always easy because it does not happen.

For example, in a conventional device, a guide for supporting the core mold at a height slightly lifted from the block is provided in the core mold withdrawing part, and a structure for pulling out the core mold while supporting the core mold with this guide, A structure is adopted in which the extraction head, which supports the child die and moves horizontally, moves upward by the action of the taper guide to separate the core die from the block.

<Problems to be solved by the invention> When the core mold is lifted from the block, it is necessary to peel off the core mold from the surface of the block, so it is necessary to apply considerable force. And once the core mold is lifted up, it does not require that much force to pull it out. However, in the conventional structure, there is a drawback that a force in the direction of lifting the core mold from the block cannot be sufficiently applied, and therefore a strong pulling force is applied to separate the core mold from the block. In reality, there are problems that an excessive pulling device is required and that work efficiency is poor.

This invention has been made to solve the above-mentioned problems of the conventional core-type extracting device.

<< Means for Solving the Problems >> An apparatus according to the present invention, which has solved the above problems, has a machine frame 11 that moves horizontally relative to a molded block and a take-out head 16 that is inserted or connected to the core mold 5. It has and. The machine frame 11 can be provided so as to be guided horizontally in the outer mold 4 for molding the block, or can be provided so as to be guided horizontally in the frame or floor on which the block or the mold is placed. You can also The extraction head 16 supports the core die 5 or is connected to the core die 5 to apply a lifting force or a pulling force to the core die 5.

The extraction head 16 is pivotally supported by a pin 18 on the upper ends of two parallel links 14, 15 whose lower ends are pivotally supported by the machine frame 11 by pins 17. The parallel links 14 and 15 are swingable around the pin 17 at the lower end, and are in a state of being erected vertically.

The upper part of the extraction head 16 or the parallel links 14 and 15 and the machine frame
11 is connected by pulling devices 30 and 40. This pulling device is mounted so that the parallel links 14 and 15 swing in a direction from the upright direction to the upright direction. The attracting device preferably has a structure including a boosting mechanism such as a screw mechanism, a toggle link mechanism or a lever mechanism.

<< Operation >> After the core die 5 in the molded block is squeezed to reduce the diameter, the extraction head 16 is inserted into the core die 5 to support the core die 5, or the extraction head is connected by the connecting pin 26 or the like. 16 and core mold 5 are connected to each other, and pulling devices 30, 40 are operated. The pulling devices 30 and 40 swing the parallel links 14 and 15 from the upright direction to the upright direction, but this swing causes the extraction head 16 to make an arc motion and slightly move up. At this time, the extraction head transmits a powerful upper power to the core mold 5 by the boosting action of the parallel links 14 and 15 and further by the boosting mechanism of the drawing devices 30 and 40. It can be easily detached and raised. Therefore, the machine frame 11 is horizontally moved to pull out the core mold 5 that has been separated from the block.

<< Embodiment >> A drawing shows an embodiment of the present invention. 1 in the figure
Is a frame base, 2 is a horizontal rail made of grooved steel installed on the base, 3 is a base plate on the rail, 4 is an outer mold on the base plate, and 4 is an outer mold. With the known structure, the block is opened when the block is demolded.

5 is a core type of known structure, and as shown in FIG.
It has a longitudinal auxiliary frame 5a that can be retracted inward, a bending portion 5c that lacks the reinforcing member 5b, and a drawing device 5d, and when the block is released from the mold, the auxiliary frame 5a is retracted to draw the device.
The diameter is reduced by pulling the opposing frame plates 5e, 5e at 5d. A bracket 6 having a pin hole is fixed to the upper part of the front end of the core mold, and a receiving seat 7 is fixed to the center of the lower part of the front end.

Reference numeral 11 denotes a machine frame of the core die extracting device, which includes a base portion 11a, a link support portion 11b, and a standing frame portion 11c, and a front wheel 12 rolling on the floor surface GL at the front end of the base portion 11a, and the above at the rear end. A rear wheel 13 that rolls along the groove of the rail 2 is pivotally mounted.

14 and 15 are links, 16 is a extraction head,
The lower ends of 14, 15 are pivotally attached to the link support portion 11b of the machine frame by pins 17, and the upper ends thereof are pivotally attached to the extraction head 16 by pins 18, so that the links 14 and 15 are not necessary to be exact. Form parallel links. One side 14 of the link is provided with a length adjusting section 19 using a screw mechanism in the middle part. Brackets 20 and 21 are fixed to the center of the front end and the rear end of the extraction head 16, the base end of a screw rod 22 is pivotally attached to the front bracket 20 with a pin 23, and the rear bracket 21 has a pin hole. It faces the core type bracket 6. On the other hand, a nut 24 is fixed to the link support portion 11b of the machine frame so as to face the core type seat 7, and the tip of a bolt 25 screwed to the nut faces the seat 7.

A receiver 32 rotatably supported by a horizontal shaft 31 (FIG. 4) orthogonal to the screw rod 22 is pivotally attached to the upper end of the standing frame portion 11c of the machine frame. It penetrates the receiver 32. A handle 33 is screwed onto the screw rod 22, and a boss 33a of the handle and a receiving member 32 are in surface contact with each other on a facing surface 34. This facing surface is preferably a spherical surface centered on a certain point on the axis of the screw rod 22.

In the above structure, the core die 5 is mounted with the front end bracket 6 connected to the rear bracket 21 of the extraction head by the connecting pin 26. In this state, the core die 5 is horizontally supported by bolts. Adjust the advance length of 25. When the core die 5 is loaded in the outer die 4, the links 14 and 15 are slightly inclined in the direction of the core die. In this state, after molding the block, the core die 5 is squeezed. When the handle 33 is rotated to draw the screw rod 22, the links 14 and 15 swing in the upright direction, and the extraction head 16 moves slightly upward in an arc locus. This upward movement and extraction head 16
The core mold 5 is lifted in the block by the horizontal movement in the pull-out direction, and is detached from the block and lifted up. Then, the machine frame 11 is moved to pull out the core mold 5, and the outer mold 4 is opened to release the product.

FIG. 5 is a view showing another embodiment of the attracting device, in which an eccentric pin 43 is provided on an operation lever 41 pivotally attached to the tip of the standing frame portion 11c of the machine frame by slightly deviating it from its fulcrum 42. The pin is connected to the front bracket 20 of the extraction head 16 by a link 44, and the operation lever 41 is rotated counterclockwise in the figure so that the extraction head 16 can be pulled. At the pulling end, the eccentric pin 43 is at a dead center position around the fulcrum 42, and the pulling state is maintained. This structure is
It can be adopted when the pulling stroke of the extraction head is accurately known by experiments or calculations.

In the illustrated embodiment, the extraction head 16 is connected to the core mold 5 by the connecting pin 26.
It is also possible to insert a support rod (not shown) extending from 16 into the core mold 5 so as to hold the core mold. In this case, it is necessary to make the support rod sufficiently rigid.

<Effect of device> According to the device described above, a strong lifting force can be applied to the core mold laterally inserted in the block by a simple operation, and the core mold is operated by the operation. The core mold can be easily pulled out by moving the machine frame after removing it from the block. Therefore, as compared with the conventional device, the core die can be easily and quickly removed, and the structure of the device is simple.

[Brief description of drawings]

1 to 4 are views showing a first embodiment of the present invention, FIG. 1 is a side view showing a form in section, FIG. 2 is a front view, and FIG. FIG. 4 is a sectional view of a portion A of FIG. 4, and FIG. FIG. 5 is an enlarged side view showing a second embodiment of the drawing device. In the figure, 2: Rail, 4: Outer mold 5: Core mold, 6: Bracket 7: Seat, 11: Machine frame 12,13: Wheel, 14,15: Link 16: Extraction head, 17, 18: Pin 22: screw rod, 25: bolt 26: connecting pin, 30: pulling device 32: receiving device, 33: handle 40: pulling device, 41: operating lever 43: eccentric pin, 44: link

Claims (1)

[Scope of utility model registration request] 1. A machine frame comprising a machine frame (11) which moves horizontally relative to a molded block and an extraction head (16) which is inserted or connected to a core mold (5). The extraction head is pivotally connected to and supported by the upper ends of two parallel links (14) and (15) which are pivotally supported by the lower end of the parallel links (14) and (15). A concrete block characterized in that pulling devices (30) and (40) for pulling the parallel link which is connected to the upper end portion and the machine frame and is inclined so as to swing in the upright direction are provided. Core die removal device.