JPH057198Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fixing device for fixing a cleaning lid provided at the bottom of a hopper of a concrete pump with a cleaning hole closed.

[Conventional technology]

A fixing device for a cleaning lid in a conventional concrete pump is constructed as follows.

That is, as shown in FIGS. 3 and 4, a bell crank 3 is provided on a bracket 2 at the bottom of the hopper 1 so as to be rotatable up and down on a pivot 4, and the hopper 1 is attached to one end 3a of the bell crank 3. A cleaning lid 5 that closes a cleaning hole 1a formed at the bottom of the bell crank 3 is attached to the other end 3b of the bell crank 3 using a support shaft 8. 1
0 are connected by a connecting pin 11, and the washing hole 1a can be freely opened and closed by rotating the washing lid 5 together with the bell crank 3 using a hydraulic cylinder 9 about a pivot 4.

In addition, in case the hydraulic cylinder 9 malfunctions, a cylinder 12 is attached to the hopper 1 with a support member 13, and a cam lever 1 having a cam 14 is mounted.
5 is attached to the support member 13 by inserting the cam 14 into the cylinder 12, and the rotation of the cam lever 15 causes the cam 14 to press the mounting shaft 6 upward, and the insertion hole 13a formed in the support member 13 is pressed upward.
It has a structure in which the cleaning lid 5 is fixed by press-fitting a clasp 16 into the holder.

[Problem that the invention attempts to solve]

However, with the above structure, concrete easily adheres to and hardens on the cam lever 15, kotsuta 16, etc. located below the cleaning hole 1a, and once the concrete hardens, a hammer is required to open the cleaning lid 5. Not only is it necessary to use a hammer to chip (peel off) the hardened concrete, but when handling the hammer, one is forced to bend at the waist in a cramped position, which is not easy and takes time. In addition, since there is play in the hinge part of the cleaning lid 5, that is, the part between the pivot 4 and the mounting shaft 6, two lockers 16 may be required to completely fix the cleaning lid 5, and the structure is From the beginning, the fixing and opening operations become complicated, and the support member 1
3 to the hopper 1 and a fixing device needs to be installed, which is troublesome.

This invention can quickly and accurately close the cleaning hole of the hopper, has almost no risk of fresh concrete adhering to it, can be used in common with multiple existing concrete pumps, and has a simple structure and operation. The purpose of the present invention is to provide a fixing device for a cleaning lid in a concrete pump that is easy to fix.

[Means for solving problems]

In order to achieve the above object, the present invention attaches a cleaning lid that closes a cleaning hole formed at the bottom of the hopper to one end of the bell crank, which is pivotally attached to the hopper so as to be able to rotate up and down, and An opening/closing cylinder is connected to the other end of the crank, which opens and closes the cleaning hole by rotating the bell crank together with the cleaning lid about a pivot, and two locking members are connected to the bell crank by bolts. and the bolt are telescopically connected by a nut screwed onto the bolt, and when one locking member is locked to the other end of the bell crank and the other locking member is locked to the fixed member, the bolt is The structure is such that a telescopic jack is removably attached, which is extended by the relative rotation of the nut to press the cleaning lid against the hopper and close the cleaning hole.

[Effect]

When the opening/closing cylinder is extended and the bell crank is rotated about the pivot, the cleaning lid attached to one end of the bell crank is pressed against the hopper and closes the cleaning hole. Also, when the opening/closing cylinder is retracted, the cleaning lid separates from the hopper and opens the cleaning hole. In the event that the above-mentioned opening/closing cylinder or its operating system malfunctions, one locking member of the telescopic jack should be locked to the other end of the bell crank, and the other locking member of the telescoping jack should be locked to the fixed member. Rotate the nut, extend the telescopic jack, and press the cleaning lid against the hopper to close the cleaning hole in the same way as with the cylinder. If it becomes necessary to open the cleaning hole, loosen the nut and reduce the expansion jack.

〔Example〕

1 and 2 show an embodiment of the present invention, and reference numeral 20 in the figures indicates a hopper of a concrete pump. The front side of this hopper 20 has through holes 20a and 20b to which two concrete cylinders (not shown) are connected, and the bottom part has a cleaning hole 20c.
are provided respectively, and through holes 20a, 2
A swinging cylinder 22 for swinging a swinging tube (not shown) placed in the hopper 20 left and right about a central axis 21 is provided above the hopper 0b.

A bracket 23 is provided at the bottom of the hopper 20, and a bell crank 24 is attached to the bracket 23 so as to be rotatable up and down on a pivot 25.
A cleaning lid 26 for opening and closing the cleaning hole 20c (at the right end in FIG. 1) is supported by a mounting shaft 27 so as to be rotatable up and down. Another bracket 28 is fixed to the side of the hopper 20, and an opening/closing cylinder 29 is attached to this bracket 28 with a support shaft 30, and the tip of the piston rod 31 is attached to the other end 24b of the bell crank 24. They are connected by a connecting pin 32. In this configuration, when the piston rod 31 of the opening/closing cylinder 29 is contracted, the bell crank 24 rotates clockwise in FIG. let Further, when the piston rod 31 of the opening/closing cylinder 29 is extended, the cleaning lid 26 is pressed against the hopper 20 to close the cleaning hole 20c.

Reference numeral 33 denotes a telescopic jack, which includes a locking member 35 to which a bolt 34 is fixed, another locking member 37 to which a cylindrical body 36 into which the bolt 34 is inserted is fixed, and a locking member 37 that is screwed onto the bolt 34. It consists of a nut 38. This telescopic jack 33 is attached between a fixing member 39 near the hopper 20 and the other end 24b of the bell crank 24.
Apply force to the other end 24b and close the cleaning lid 26 to the hopper 2.
0 to keep the cleaning hole 20c closed, and is assembled by inserting the bolt 34 of one locking member 35 into the cylinder body 36 of the other locking member 37. Attach the locking portion 35a of the member (the locking member 35 in the figure) to the connecting pin 32,
Further, the locking portions 37a of the other locking member 37 are respectively locked to the fixing member 39 for use. Note that the locking portions 35a, 37a of the locking members 35, 37 are formed in a semicircular shape and the latter in a square shape in accordance with the shapes of the connecting pin 32 and the fixing member 39.

Next, the operation of the cleaning lid fixing device in the concrete pump according to the present invention constructed as described above will be explained.

When the opening/closing cylinder 29 operates normally, the piston rod 31 is extended, the cleaning lid 26 is pressed against the hopper 20 to close the cleaning hole 20c, and the piston rod 31 is contracted to close the cleaning hole 20c. Open.

In addition, if the opening/closing cylinder 29 or its operating system breaks down, the locking portion 35a of the locking member 35 is locked to the connecting pin 32, and the locking portion 37a of the other locking member 37 is connected to the fixing member. 39 and connect the telescopic jack 33 to the bell crank 24 and the fixing member 3.
9, extend the telescopic jack 33 by tightening the nut 38, rotate the bell crank 24 counterclockwise in FIG. to close the cleaning hole 20c (see FIG. 1). To open the cleaning hole 20c from this blocked state, tighten the nut 3.
8 to retract the telescopic jack 33 and remove the telescopic jack 33 from the bell crank 24. When the telescopic jack 33 is not used, the telescopic jack 33
between two suitable members such as hopper 20,
Tighten the nut 38 and store as shown in FIG.

Examples and technical matters other than those described above are listed below.

(1) The support shaft 30 and bracket 28 are attached to the fixed member 39.
You can also use

(2) It is also possible to use a telescoping jack with a turnbuckle structure, in which bolts with left and right threads are reverse-threaded are screwed into nuts fixed to the two locking members 35 and 37.

(3) A locking portion may be provided at the other end 24b of the bell crank 24, and a locking member of the telescopic jack 33 may be locked to the locking portion to apply force to the bell crank 24.

[Effect of idea]

As explained above, the cleaning lid fixing device for the concrete pump according to the present invention closes the cleaning hole formed at the bottom of the hopper at one end of the bell crank which is pivotally attached to the hopper so as to be able to rotate up and down. A cleaning lid is attached to the bell crank, and an opening/closing cylinder is connected to the other end of the bell crank for opening and closing the cleaning hole by rotating the bell crank together with the cleaning lid about a pivot, and the bell crank is connected to an opening/closing cylinder that opens and closes the cleaning hole. In this case, two locking members are telescopically connected by a bolt and a nut screwed onto the bolt, one locking member is attached to the other end of the bell crank, and the other locking member is attached to a fixed member. In each locked state, a telescopic jack is detachably attached that expands by the relative rotation of the nut to the bolt and presses the cleaning lid against the hopper to close the cleaning hole, so the cleaning hole can be quickly and easily closed. And it can be closed accurately. In addition, the telescopic jack is removable and is installed between the fixing member and the other end of the bell crank on the side of the hopper.
There is less risk of fresh concrete adhering to this,
Furthermore, even if concrete were to stick to the telescopic jack, its functionality would hardly be impaired, and the adhering concrete could be chipped in a comfortable posture without having to bend at the waist. Another great advantage is that it can be used in common with multiple existing concrete pumps.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a front view of a fixing device for a cleaning lid in a concrete pump according to the present invention, and Figure 2 shows a state in which the telescopic jack is stored. FIG. Third
The figure is a front view showing a conventional cleaning lid fixing device.
The figure is a view taken along the - arrow in FIG. 20...Hopper, 20c...Cleaning hole, 24...
Bell crank, 24a... one end, 24b... other end, 25... pivot, 26... cleaning lid, 29... opening/closing cylinder, 33... telescopic jack, 34...
bolt, 35...locking member, 37...locking member,
38...nut, 39...fixing member.

Claims (1)

[Scope of utility model registration request] A cleaning lid 26 that closes a cleaning hole 20c formed at the bottom of the hopper 20 is attached to one end 24a of the bell crank 24, which is vertically rotatably attached to the hopper 20 with a pivot 25. An opening/closing cylinder 29 is connected to 24b, which opens and closes the cleaning hole 20c by rotating the bell crank 24 together with the cleaning lid 26 about a pivot 25.
The two locking members 35 and 37 are telescopically connected by a bolt 34 and a nut 38 screwed onto the bolt 34, and one of the locking members 35 is connected to the bell crank 2.
4 and the other locking member 37 is locked to the fixing member 37,
Relative rotation of the nut 38 with respect to the bolt 34 expands and pushes the cleaning lid 26 against the hopper 20 to open the cleaning hole 2.
A fixing device for a cleaning lid in a concrete pump, characterized in that a telescopic jack 33 for closing 0c is detachably attached.