JP2646252B2 - Pumping equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention mainly relates to a pumping device for pumping an object to be pumped such as concrete.

(Prior Art) Conventionally, as this type of pumping device, for example,
There is a concrete delivery machine as described in -54978. This is a piston that slides in the cylinder, filling concrete from the receiving port into the accommodation space in the cylinder,
In addition, the filled concrete is alternately delivered to the delivery port, and the cylinder is rotated so that the receiving port and the delivery port can be alternately communicated with the storage space.

Further, there is a fluid transfer device as described in JP-A-49-68906. This is provided with at least two soft tubes, and these tubes are rolled and deformed by a spherical roller, and one is provided for fluid transfer and the other is provided for restoring the transfer tube.

(Problems to be Solved by the Invention) However, in the above-described pumping device, it is difficult to provide a power for driving the piston and a power for rotating the cylinder separately. Has been disadvantageous in that a relatively large output must be used as the power to drive the piston because the piston is sent out by the piston.

Further, in the fluid transfer device as described above, a separate restoration tube must be provided for restoring the transfer tube, and the device itself is complicated and large.

In particular, in the conventional pumping device, the elastic cylinder that is repeatedly crushed many times does not completely restore only by its own elastic force, and has a drawback such as a poor pumping efficiency.

(Means for Solving the Problems) In view of the above, the present invention aims to eliminate the above-mentioned difficulties and the like, and to simplify the configuration, realize reliable pressure-feeding without failure, and easily reduce the size. The pressure feeding device according to claim 1, wherein the cylindrical elastic cylinder 20 having appropriate elasticity is provided.
And at least one of them is movable back and forth, clamps the elastic cylinder 20 in a direction substantially perpendicular to the cylinder core, and a pair of compression bodies 2 provided in a plurality along the cylinder core direction of the elastic cylinder 20. When,
A hydraulic or pneumatic drive device for moving the compression body 2 toward and away from the elastic cylinder 20 is provided, and each of the pair of compression bodies 2 sequentially presses the elastic cylinder 20 with the driving force of the drive device. It is configured to be able to successively pressurize the conveyed object C such as concrete in the elastic cylindrical body 20 toward the outlet 22 of the elastic cylindrical body 20, and a link 13 is provided at both ends of the pair of compression bodies 2. A pair of side pressing members 12 are connected to each other, and the pair of side pressing members 12 are separated when the elastic cylinder 20 is pressed by the pair of pressing members 2, and are separated when the pair of pressing members 2 are separated. In order to restore the elastic cylinder 20 clamped by the pair of compression bodies 2, the elastic cylinder 20 is moved in a direction perpendicular to the moving direction of the pair of compression bodies 2 so as to close the side portions of the body 20. Is adopted so as to be able to press.

Further, in the pressure feeding device according to the second aspect, the cylindrical elastic cylindrical body 20 having appropriate elasticity, and the elastic cylindrical body 20 at least one of which is capable of moving forward and backward, and is substantially perpendicular to the cylindrical core. A pair of compression bodies 2 arranged along the direction of the cylinder center of the elastic cylinder 20 and a pair of compression bodies 2 are moved toward and away from the elastic cylinder 20 by hydraulic pressure or pneumatic pressure. And a driving device, wherein the driving force of the driving device is not a force for each of the pair of compression bodies 2 to sequentially press the elastic cylinder 20, and the conveyed object C such as concrete in the elastic cylinder 20 is elastic cylinder 20. And a pair of side pressing members 12 which are respectively advanced and retracted toward the elastic cylinder 20 by hydraulic or pneumatic driving devices on both sides of the elastic cylinder 20. The pair of side pressing members 12 and the pair of pressing members 2 are separated when the elastic cylinder 20 is pressed by the pair of pressing members 2, When the pair of compression bodies 2 are separated from each other, they approach each other so as to clamp the side portions of the elastic cylinder 20, and move in the moving direction of the pair of compression bodies 2 to restore the elastic cylinder 20 clamped by the pair of compression bodies 2. Elastic cylinder in the direction perpendicular to
Means configured to be able to press 20 was adopted.

(Operation) In the pressure feeding device according to the first aspect, one of the pair of compression bodies 2 or both of the compression bodies 2 is operated by the operation of the driving device by hydraulic pressure or pneumatic pressure. 2
Are moved forward and backward toward the elastic cylinder 20 to clamp the elastic cylinder 20. The elastic cylinder 20 is pressed by the compression body 2 in a direction perpendicular to the cylinder core. The driving force of the driving device is a force by which the pair of compression bodies 2 sequentially press the elastic cylinder 20. The object to be conveyed C such as concrete in the elastic cylinder 20 is sequentially pressure-fed toward the outlet of the elastic cylinder 20.

By the way, the pair of side pressing members 12 are respectively connected to both ends of the pair of pressing members 2 via the link 13 and are separated when the elastic cylinder 20 is pressed by the pair of pressing members 2. At the time of separation, the elastic cylinders 20 approach each other so as to pinch the side surfaces thereof. That is, the elastic cylinder 20 is pressed in a direction orthogonal to the moving direction of the pair of compression bodies 2 in order to promote the restoration of the elastic cylinder 20 sandwiched between the pair of compression bodies 2.

Further, in the pressure feeding device according to the second aspect, one of the pair of compression bodies 2 or both of the compression bodies 2 are elastic by the operation of the driving device by hydraulic pressure or pneumatic pressure. The elastic cylinder 20 is pressed and retracted toward the cylinder 20 to press it. The compression body 2 presses the elastic cylinder 20 in a direction perpendicular to the cylinder core, and the driving force of the driving device is
The pair of compression bodies 2 serves as a force for sequentially clamping the elastic cylinder 20,
The conveyed object C such as concrete in the elastic cylinder 20 is an elastic cylinder.
It is sequentially pumped toward 20 outlets.

By the way, the pair of side pressing members 12 are arranged so as to advance and retreat toward the elastic cylinder 20 by a hydraulic or pneumatic driving device, and are separated when the elastic cylinder 20 is clamped by the pair of compression bodies 2. When the pair of compression members 2 are separated from each other, they approach each other so as to clamp the side surface portion of the elastic cylinder 20. That is, the elastic cylinder 20 is pressed in a direction orthogonal to the moving direction of the pair of compression bodies 2 in order to promote the restoration of the elastic cylinder 20 sandwiched between the pair of compression bodies 2.

(Examples) Hereinafter, the present invention will be described with reference to illustrated examples as follows.

In the figure, reference numeral 1 denotes a driving hydraulic cylinder as a driving device mounted on the machine frame A, and a compression body 2 is mounted on the driving hydraulic cylinder 1 via a mounting rod 1.

The machine casing A is provided with an elastic cylindrical body 20 having a relatively large elasticity made of a rubber material or a synthetic resin material as appropriate. It is arranged in.

On both left and right sides of the elastic cylinder 20, a pair of substantially cross-sectionally semi-cylindrical compression bodies 2 (2a, 2a, 2b, 3
a, 3b, 4a, 4b, 5a, 5b) Plural sets are arranged at equal intervals along the vertical direction. In addition, the drive hydraulic cylinder 1
Are also arranged on the left and right sides of the elastic cylinder 20 together with the compression body 2.

The driving hydraulic cylinders 1 respectively move the pair of compression bodies 2 forward and backward, for example, as shown in FIG. 2, and each of the pair of compression bodies 2 sequentially presses the elastic cylinder 20 to form the elastic cylinder 20. The object to be conveyed C such as concrete in the inside 20 is configured to be sequentially pressurized toward the outlet 22 of the elastic cylinder 20.

In the figure, reference numeral 23 denotes a hopper communicating with the receiving port 21 of the elastic cylinder 20, and reference numeral 24 designates a rotor communicating with the delivery port 22 of the elastic cylinder 20.

Next, the operation state will be described with reference to FIG.

That is, first, as shown in FIG. 2 (A), the hydraulic cylinder 1 for driving is actuated to press the substantially middle portion of the elastic cylinder 20 with the middle compression bodies 3a, 3b and 4a, 4b. .

At that time, the pressure-carrying material C is charged from the hopper 23 shown in FIG. Then, since the upper portion of the elastic tubular body 20 is still expanded, the space to be conveyed with the object C is filled by gravity.

At this time, the elastic cylinder 20 is directly connected to a mixer (not shown) instead of the hopper 23, and the object C is forcibly sent out into the elastic cylinder 20 to some extent by the driving force of the mixer. You can also do so.

Next, as shown in FIG. 2 (B), the drive hydraulic cylinder 1 is operated to move the upper compression bodies 2a and 2b and the lower compression bodies 5
The upper and lower portions of the elastic cylinder 20 are clamped by a and 5b, and the compression bodies 3a, 3b and the compression bodies 4a and 4b are retracted to expand the middle portion of the elastic cylinder C.

Then, the object to be transferred C moves from the upper portion of the elastic cylinder 20 to the intermediate portion, and the compression bodies 2a, 2
Even if the upper portion is clamped by b, a space is formed at the uppermost portion, and the material to be transferred C is lowered from the hopper 23 and filled in the space as described above.

Then, as shown in FIG. 2 (C), the hydraulic cylinder 1 for driving is operated again, and the compression members 3a, 3b, 4
A and 4b clamp the substantially middle portion of the elastic cylindrical body 20, and
The upper compression bodies 2a and 2b and the lower compression bodies 5a and 5b are retracted from the elastic cylinder 20.

Then, the upper part and the lower part of the elastic cylinder 20 expand, and the middle part is pressed. Therefore, the object C to be transferred in the middle part of the elastic cylinder 20 moves to the lower part of the elastic cylinder 20, and the space above the elastic cylinder 20 is filled with the object C to be conveyed.

Next, as shown in FIG. 2 (D), the steps shown in FIG. 2 (B) are repeated again, and these steps are sequentially repeated, thereby sequentially transferring the pressure-carrying material C from the hopper 23 to the rotor 24. It is to be pumped. The operating state of the compression body 2 is as follows.
The present invention is not limited to this, and can be set as appropriate according to the number of compression bodies 2 and the length and shape of the elastic cylinder 20.

By the way, in this pair of left and right compression bodies 2, the first
As shown in the figure, the height of one compression body 2 (2a, 3a, 4a, 5a) and the other compression body 2 (2b, 3b, 4b, 5b) is slightly shifted, and the elastic cylinder 20 is moved. When the pressure is applied, the conveyed object C such as concrete in the elastic cylinder 20 can be smoothly pumped in the common tangential direction of the curved surface at the distal end portion of the compression body 2 and the elastic cylinder 20 and The compression body 2 and the driving hydraulic cylinder 1 are formed so as to prevent damage.

As shown in the embodiment shown in FIG. 3, one compression body 2 (2a, 3a, 4a, 5a, 6a, 7a) and the other compression body 2 (2b,
3b, 4b, 5b, 6a, 7a) at the same position. Then, a pair of upper compression bodies 2a and 2b and lower compression bodies 7a and 7a, which clamp the upper and lower portions of the elastic cylindrical body 20, respectively.
7b, pressing bodies 3a, 3 for pressing the intermediate portion of the elastic cylindrical body 20
b, compression bodies 4a, 4b, compression bodies 5a, 5b, so that the compression surface against the elastic cylinder 20 is smaller than the compression bodies 6a, 6b, the curvature of the surface is increased and the tip is formed at an acute angle. If this is the case, the elastic cylinder 20 will be more strongly pinched, and the upper and lower portions of the elastic cylinder 20 will be reliably closed and the object to be transferred C will be captured, so that the object to be transferred C will be more efficiently pumped. . Also, because of this, the driving force of the upper compression bodies 2a, 2b and the lower compression bodies 7a, 7b is sufficient even with a small force, and the driving force can be saved.

As shown in the embodiment shown in FIG. 1 or FIG. 2, the pair of compression bodies 2 are such that each of the pair of compression bodies 2 can freely advance and retreat, and the pair of compression bodies 2 advance and retreat toward the elastic cylinder 20. 4
As shown in FIG. 5 and FIG. 5, only one of the compression bodies 8d and 9d may be movable forward and backward, and the other compression bodies 8c and 9c may be fixed. In such a case, there is an advantage that the structure can be simplified as compared with the case where each of the pair of compression bodies 2 can freely move forward and backward. The position of the compression body 2 can also be set as appropriate, and the other advancing / retracting compression body 8d is arranged so as to be located in the middle between one fixed compression body 8c and the next sliding compression body 9d. Or between the fixed compression body 8c and the next sliding compression body 9d, which are relatively spaced apart from each other, (see FIG. 4), and the other compression body 8d which moves forward and backward is fixed. The body 9c may be provided (see FIG. 5).

Also, the shape itself of the compression body 2 is not limited to the above-described example. For example, as shown in FIG. 6, the side surface is substantially bifurcated so that the pressing portion 10 for pressing the elastic cylindrical body 20 is provided at two places. 7, or as shown in FIG. 7, the pressing portion 10 for pressing the elastic cylindrical body 20 may be formed in a substantially trifurcated shape on the side so that there are three places. Since the plurality of pressing portions 10 are provided by forming the side surface substantially bifurcated or the side surface substantially trifurcated in this way, the elastic cylinder 20 is more securely and firmly pressed to efficiently and surely pressurized the transferred object C. Can be pumped.

As shown in FIGS. 8 to 11, the elastic cylinder 20 is pressed in a direction orthogonal to the direction of movement of the compression body 2 in order to restore the elastic cylinder 20 clamped by the compression body 2. An appropriate pressing means may be provided.

That is, as shown in FIG. 8 and FIG. 9, there is a type that employs a link mechanism in which one end of each of links 13 is rotatably and pivotally provided at both ends of a pair of opposing compression bodies 2. The link 13 is formed by two connecting rods whose central portions are smooth, and both ends of the link 13 are pivotally connected to both ends of the compression body 2. Then, the side pressing body 12 is
When the pair of compression bodies 2 advance and retreat with respect to the elastic cylindrical body 20, the pair of compression bodies 2 advance and retreat in a direction orthogonal to the moving direction of the pair of compression bodies 2, and Is the elastic cylinder 20
Are arranged to be pressed from the side.

Then, as shown in FIG. 9, when each of the pair of compression bodies 2 clamps the elastic cylinder 20, the pair of side pressing bodies 12 separates from the elastic cylinder 20, and as shown in FIG. 2 is retracted from the elastic cylinder 20, the pair of side pressing bodies 12
Operates to expand the elastic cylinder 20 by pressing the elastic cylinder 20 from the side.

As another pressing means, as shown in FIG. 10 and FIG. 11, apart from the pair of pressing bodies 2, hydraulic (or pneumatic)
Some employ a hydraulic mechanism 14 that presses from the side of the elastic cylinder 20. That is, the driving hydraulic cylinder 15 for the side pressing body 12 is disposed in a direction orthogonal to the moving direction of the pair of compression bodies 2 disposed on the left and right sides of the elastic cylinder 20. As shown in the figure, when each of the pair of compression bodies 2 advances to clamp the elastic cylinder 20, the side pressing body 12 separates from the elastic cylinder 20, and as shown in FIG. When retreating from 20, the side pressing body 12 operates so as to expand the elastic cylinder 20 by pressing it from the side of the elastic cylinder 20.

As described above, as a result of the provision of the appropriate pressing means for holding the elastic cylinder 20 in a direction orthogonal to the direction of movement of the pair of compression bodies 2, the space inside the elastic cylinder 20 due to the advance and retreat of the pair of compression bodies 2 is provided. Can reliably perform the operation of closing and expanding.

By the way, in each of the above-described embodiments, the elastic cylindrical body is used.
Although 20 is disposed vertically, the present invention is not limited to this, and the elastic cylinder 20 may be disposed in the horizontal direction as shown in FIG. In this case, there is provided a sending means, for example, a screw conveyor 25, for sending the object to be pressed C such as concrete into the elastic cylindrical body 20.

Incidentally, as shown in FIG. 13, a plurality of elastic cylinders 20 may be arranged in parallel, so that a large amount of the article to be conveyed C can be extremely efficiently pumped. Body 20
If the advancing / retreating operation of the compression body 2 is controlled so that the pressure-conveyed object C sent from the cradle is continuously sent, the working efficiency can be further improved.

By the way, as described above, the mounting position, the shape, the number, etc. of the compression body 2 can be freely set as appropriate without being limited to the illustrated examples and the like. But it is good. Needless to say, the other mechanisms are not limited to the above-described structure.

Further, the elastic cylindrical body 20 is appropriately made of an elastic material, but may be a material in which a metal wire is appropriately disposed in a buried state as reinforcement.

(Effects of the Invention) Therefore, the pressure feeding device according to the first aspect has a cylindrical elastic cylinder 20 having elasticity as appropriate, and at least one of the cylinders is capable of moving forward and backward.
The elastic cylinder 20 is sandwiched in a direction substantially orthogonal to the cylinder core, and a plurality of sets of compression bodies 2 arranged along the direction of the cylinder core of the elastic cylinder 20 are provided. A hydraulic or pneumatic driving device for moving the elastic cylinder 20 toward and away from each other, and the driving force of the driving device is not a force for each of the pair of compression bodies 2 to sequentially press the elastic cylinder 20; The object C to be conveyed, such as concrete, inside the container 20 is configured to be sequentially pressurized toward the outlet 22 of the elastic cylindrical body 20, and a pair of side pressing members are provided at both end portions of the pair of pressing members 2 via the link 13. The pair of side pressing members 12 are separated from each other when the pair of pressing members 2 press the elastic cylinder 20, and the side portions of the elastic cylinder 20 are separated when the pair of pressing members 2 are separated from each other. Approach to press and restore the elastic cylinder 20 clamped by the pair of compression bodies 2
Since the elastic cylinder 20 is configured to be able to be pressed in a direction perpendicular to the direction of movement of the pair of compression bodies 2, hydraulic pressure, or
With the pneumatic driving device, that is, the driving hydraulic cylinder 1 or the pneumatic cylinder alone, the object C, such as concrete, in the elastic cylinder 20 can be reliably and smoothly transferred to the elastic cylinder 20.
Can be sequentially pumped toward the delivery port 22 of the cylinder, and the relatively large pressure
Pumping force can be obtained. In addition, since the control of the hydraulic cylinder 1 for driving and the like is very simple, it is possible to accurately perform the pressure feeding, and the structure of the pressure feeding device itself is simple and hard to break down. This makes it easier to reduce the size and size of the device itself.

In particular, a pair of side pressing members 12 are respectively connected to both end portions of the pair of pressing members 2 via a link 13, and the pair of side pressing members 12 are formed of the elastic cylinder 20 by the pair of pressing members 2. When the pair of compression members 2 are separated from each other, the pair of compression members 2 approach each other so as to pinch the side surface portion of the elastic cylinder 20 when the pair of compression members 2 are separated from each other. Since the elastic cylinder 20 can be pressed in a direction perpendicular to the moving direction of the body 2, the operation of closing or expanding the space inside the elastic cylinder 20 due to the advance and retreat of the compression body 2 can be reliably performed. Thus, the object to be conveyed C such as concrete in the elastic cylinder 20 can be sequentially and more efficiently and reliably pumped toward the outlet 22 of the elastic cylinder 20. That is, the elastic cylindrical body 20 repeatedly crushed many times can be reliably and completely restored, and the pumping efficiency is improved. In addition, the structure for restoring the elastic cylindrical body 20 is extremely simple, it is easy to reduce the size and size, and it is possible to expect a reliable operation, and it is possible to realize a reliable pumping with excellent durability and no failure.

Further, the pressure feeding device according to the second aspect of the present invention provides a cylindrical elastic cylinder 20 having appropriate elasticity, and at least one of the elastic cylinder 20 is capable of moving forward and backward, and presses the elastic cylinder 20 in a direction substantially orthogonal to the cylinder core. A plurality of sets of compression bodies 2 arranged along the direction of the center of the elastic cylinder 20, and a hydraulic or pneumatic drive device for moving the compression bodies 2 toward and away from the elastic cylinder 20, respectively. The driving force of the driving device is not the force by which each of the pair of compression bodies 2 sequentially presses the elastic cylinder 20, and the conveyed object C such as concrete in the elastic cylinder 20 is sent out of the elastic cylinder 20. It is configured to be able to sequentially feed toward 22, and on both sides of the elastic cylinder 20,
The elastic cylinder 20 is driven by a hydraulic or pneumatic driving device.
A pair of side pressing members 12 which respectively move toward and away from each other are arranged, and the pair of side pressing members 12 and the elastic cylinder 20 formed by the pair of pressing members 2.
When the pair of compression bodies 2 are separated from each other, the elastic cylinder
In order to restore the elastic cylinder 20 clamped by the pair of compression bodies 2, the elastic cylinder 20 is moved in a direction perpendicular to the moving direction of the pair of compression bodies 2 so as to close the side portions of the compression cylinder 20. Since it is configured to be capable of being pressed, the pressure-sensitive material C, such as concrete, in the elastic cylinder 20 can be reliably and smoothly supplied only by a hydraulic or pneumatic driving device, that is, the driving hydraulic cylinder 1 or the pneumatic cylinder. Can be sequentially fed toward the outlet 22 of the elastic cylindrical body 20, and a relatively large driving force of the object 20 can be obtained by operation of the relatively small driving hydraulic cylinder 1 and the like. In addition, since the control of the hydraulic cylinder 1 for driving and the like is very simple, the pumping can be performed accurately. Further, the structure of the pumping device itself is simple, it is difficult to break down, and the compression device This makes it easier to reduce the size and size of the device itself.

Further, on both sides of the elastic cylindrical body 20, a pair of side pressing bodies 12 which respectively move toward and away from the elastic cylindrical body 20 by a hydraulic or pneumatic driving device are arranged.
Numerals 12 depart from each other when the elastic cylinder 20 is clamped by the pair of compression bodies 2, approach when the pair of compression bodies 2 are separated from each other so as to clamp the side surfaces of the elastic cylinder 20, and are clamped by the pair of compression bodies 2. In order to restore the elastic cylinder 20 that has been compressed, the elastic cylinder 20 can be pressed in a direction perpendicular to the moving direction of the pair of compression bodies 2. Can reliably perform the operation of closing or expanding the space, and more efficiently and surely sequentially pressurize the conveyed object C such as concrete in the elastic cylinder 20 toward the outlet 22 of the elastic cylinder 20. You can do it. That is, the elastic cylindrical body 20 repeatedly crushed many times can be reliably and completely restored, and the pumping efficiency is improved. Moreover, reliable operation for restoring the elastic cylinder 20 can be expected,
It is excellent in durability and can realize reliable pumping without failure.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate the present invention, wherein FIG. 1 is a front sectional view of a main part, FIG. 2 is a longitudinal sectional front view showing a process of pressing an elastic cylinder, and FIG. 4 to 7 are main part front sectional views showing another embodiment of the compression body, respectively. FIGS. 8 and 9 are diagrams of an elastic cylinder adopting a link mechanism as a side pressing means. Main part plan sectional view showing a pressed state, FIG.
FIGS. 10 and 11 are plan cross-sectional views of a main part showing a pressed state of an elastic cylinder employing a hydraulic mechanism as a side pressing means, and FIG. 12 is a front sectional view of a main part of an embodiment in which the elastic cylinder is arranged in a horizontal direction. Figure, No.
FIG. 13 is a side view of an embodiment in which a plurality of elastic cylinders are arranged in parallel. A: machine frame, C: object to be pressed, 1 ... hydraulic cylinder for driving, 2 ... compression body, 2a ... compression body, 2b ... compression body, 3a ... compression body, 3b ... compression body , 4a
... compression body, 4b ... compression body, 5a ... compression body, 5b ... compression body, 6a ... compression body, 6b ... compression body, 7a ... compression body, 7b ...
... compression body, 8c ... compression body, 8d ... compression body, 9c ... compression body, 9d ... compression body, 10 ... pressing body, 11 ... mounting rod, 12 ...
… Side pressing body, 13… link, 14… hydraulic mechanism, 15…
Hydraulic cylinder for driving 20 …… elastic cylinder, 21… inlet, 22 …… outlet, 23…
Hopper, 24 ... rotor, 25 ... screw conveyor.

Claims (2)

(57) [Claims] A cylindrical elastic cylinder having a suitable elasticity, at least one of which is capable of moving forward and backward, and presses the elastic cylindrical body in a direction substantially perpendicular to the cylindrical core; A plurality of sets of compression bodies disposed along, and a hydraulic or pneumatic drive device for moving the compression bodies toward and away from the elastic cylinder, respectively, comprising: Each compression body is configured to be capable of sequentially pressing the elastic cylinder body with a force for successively pressing the elastic cylinder body, and the material to be conveyed such as concrete in the elastic cylinder body is sequentially compressed toward the outlet of the elastic cylinder body. A pair of side pressing members are connected to each other via a link, the pair of side pressing members are separated when the elastic cylinder is pressed by the pair of pressing members, and the elastic cylindrical member is separated when the pair of pressing members are separated. The elastic cylinder approached so as to clamp the side of the cylinder, and was clamped by a pair of compression bodies In order to restore, pumping apparatus characterized by being configured so that the elastic cylindrical body can be pressed in the direction perpendicular to the moving direction of the pair of pressing members. 2. An elastic cylindrical body having appropriate elasticity, wherein at least one of the elastic cylindrical bodies is movable forward and backward and presses the elastic cylindrical body in a direction substantially perpendicular to the cylindrical core. A plurality of sets of compression bodies disposed along, and a hydraulic or pneumatic drive device for moving the compression bodies toward and away from the elastic cylinder, respectively, comprising: Each compression body has a force to sequentially compress the elastic cylinder, so that a conveyed object such as concrete inside the elastic cylinder can be sequentially pressure-fed toward the outlet of the elastic cylinder. , A pair of side pressing members which respectively advance and retreat toward the elastic cylinder by a hydraulic or pneumatic driving device, are separated when the elastic cylinder is pressed by the pair of pressing members. And press the side of the elastic cylinder when the pair of compression bodies are separated. A pressure feeding device configured to be able to press the elastic cylinder in a direction orthogonal to the moving direction of the pair of compression bodies in order to restore the elastic cylinder sandwiched between the pair of compression bodies. .