JPH0932307A - Repair material injection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily pull a piston, which extrudes a repair material, to the rear of a cylinder and fix. SOLUTION: The rear opening of a cylinder 3 provided at a tip with a nozzle 4 is covered with a cover body 5 and by pulling a piston 6 in the cylinder 3 in such a manner to insert through a piston rod 12 and the cover body 5, the piston is drawn to the rear of the cylinder 3. A guide body 21 to guide in such a manner that lock pieces 18a and 18b for fixing in a drawing state are smoothly fitted in the central through-hole of the cover body 5 is arranged on the inner side of the cover body 5. By arranging the guide body 21, the piston 16 is easily drawn to the rear of the cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair material injection device, and more particularly to a repair material injection device for injecting a repair material into a damaged portion of a wall surface caused by an earthquake or the like.

[0002]

2. Description of the Related Art Conventionally, in order to inject a repair material into a damaged portion of a wall surface to repair the wall surface, a cylinder having a nozzle at its tip is filled with the repair material and the repair material is pushed out by a piston. A repair material injection device is used.

In this repair material injection device, the piston is normally biased forward by a spring or the like, and the piston is pulled toward the rear part of the cylinder by pulling the piston rod against the biasing force and temporarily fixed. In this state, the cylinder is filled with a repair material, and the cylinder is mounted at a predetermined repair position. For this fixing, an engaging piece is provided in the middle of the piston rod, and the engaging piece is pulled out of the cylinder through a through hole of a size slightly larger than the engaging piece provided on the rear lid of the cylinder. By rotating the rod, a locking operation of hooking the locking piece on the lid is performed.

[0004]

However, since the piston and the piston rod can freely rotate in the cylinder, the position of the locking piece provided on the piston rod cannot be specified, and therefore, the locking is not possible. There is a problem in that the labor-saving work efficiency cannot be improved except for the purpose of passing the piece through a through hole having a size slightly larger than the locking piece.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a repair material injection device capable of easily attracting and fixing a piston for pushing out the repair material to the rear portion of the cylinder. is there.

[0006]

Means for Solving the Problems and Actions / Effects In order to achieve the above object, the repair material injection device according to the present invention is
A cylinder having a nozzle at the tip, a lid body having a through hole in the center and closing the rear end opening of the cylinder, a piston sliding along the inner wall surface of the cylinder, the lid body on the rear side of the piston Repairing material including a piston rod extending so as to pass through the through hole of the piston, and a spring disposed between the lid and the rear side surface of the piston in the cylinder and biasing the piston forward. In the injection device, the piston rod has locking pieces protruding to the left and right in the middle of the rod-shaped body, and the through hole of the lid body corresponds to the cross-sectional shape of the rod-shaped body and the locking piece. Consists of a circular opening and two rectangular openings cut out at both ends of the diameter of the opening, and is planted so as to surround the through hole on the inner side surface of the lid body and the piston rod on the inner peripheral side. Through A tubular guide body is provided, and two groove portions that guide the locking piece to the two rectangular openings of the through hole are provided on the inner peripheral side surface of the guide body, and the widths of these groove portions are the same as those described above. It is characterized in that the front end side of the guide body is wide.

According to the repair material injection device of the present invention, a through hole having a rectangular opening through which the locking piece extended from the piston rod passes is provided on the inner surface of the lid body provided in the central portion.
A guide body having a groove portion for guiding the locking piece is provided in the rectangular opening, and since the tip end side of the guide body is wide in this groove portion, the locking piece can be easily fitted into the groove portion to reach the rectangular opening. It can be guided and thus the piston can be easily pulled to the rear of the cylinder. Therefore, it is possible to efficiently perform the work of filling the repair material injection device with the repair material and attaching the repair material to a predetermined repair location.

In the repair material injecting device according to the present invention, on the inner side surface of the guide body, a portion of the guide body corresponding to the circular opening of the through hole extends from the front end portion to the base end portion of the guide body. There are two facing slopes that gradually increase in thickness so that a slope with a smaller inner diameter is formed, and side slopes are formed by obliquely cutting the side edges of these slopes. It is preferable that the groove is formed by being sandwiched between the side inclined surfaces.

With such a structure, if the locking piece happens to be in the position of the rectangular opening, the locking piece passes through the rectangular opening. When the locking piece is located at a position other than the rectangular opening, the locking piece first hits the inclined surface of the inclined hill. Since this inclined surface is provided so that the inner diameter of the guide body becomes smaller as it approaches the lid, the locking piece is pulled along the inclined surface toward the lid side, and the degree of freedom of the locking piece is deprived. Is less. Therefore, the piston rod can be rotated while smoothly sliding the locking piece along the inclined surface, and the side inclined surface of the side end of the inclined hill where the locking piece faces by rotating the piston rod. The operation of fitting in the groove formed between them becomes easy.

In such a structure, it is preferable that the boundary portion between the inclined surface of the inclined hill and the side inclined surface is chamfered. This is because the locking piece can easily fit into the groove portion smoothly.

Further, in the repair material injection device according to the present invention, the locking piece pulled out to the outside of the lid body through the through hole is provided in a region surrounding the through hole on the outer surface of the lid body. It is preferable to provide a shallow fixing groove for fixing so as not to rotate around. With this configuration, even if an external force is accidentally applied to the piston rod and tries to rotate, it is possible to prevent the locking piece from passing through the through hole and accidentally popping out the repair material in the cylinder. it can.

Other objects of the present invention will become apparent from the detailed description given below. However, while the detailed description and specific examples describe the most preferred embodiments, various changes and modifications within the spirit and scope of the invention will be apparent to those skilled in the art from the detailed description, and This is described as an example.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the repair material injection device according to the present invention will be described with reference to the drawings.

FIG. 1 shows a repair material injection device 1 according to an embodiment of the present invention. As shown in FIGS. 1 (a) and 1 (b), this repair material injection device 1 has a nozzle 4 provided at the tip of a cylinder 3 whose tip 2 has a conical shape, and a lid 5 at the rear opening. A piston 6 made of an elastic resin is slidably inserted inside the cylinder 3. The nozzle 4 is formed as a push-in joining portion made of an elongated cylindrical body having no thread at a predetermined length from the tip, and a rear portion of the push-in joining portion is formed as a screwing portion provided with a thread. ing. A driving metal fitting made of an elongated cylindrical body is pushed into the pushing joint portion, and a pedestal is screwed into the screwing portion.

The piston 6 has a frustoconical tip portion 7
And two annular sliding parts 8 and 8. Further, the piston 6 is supported from the rear by a support portion including a resin disk 10 and support plates 11a and 11b that cross each other in a cross shape. A piston rod 12 is provided at the center of the support so as to extend rearward.
Further, a coil spring 9 is installed between the lid 5 and the piston 6 so as to be supported by the support portion,
The coil spring 9 allows the pinton portion 6 to be biased toward the front side of the cylinder 3. Therefore, the repair material that is placed in the internal space 13 of the cylinder 3 with the lid 5 removed is pushed by the tip portion 7 of the piston 6 and is pushed out through the pipe passage 14 of the nozzle 4.

The front portion of the piston rod 12 is a rod body in which ribs 15a and 15b form a cross-shaped cross section.
The latter half is made up of a prismatic rod 16, and a triangular handle 17 is attached to the base end of this prismatic rod 16. Also,
In the middle of the ribs 15a, 15b of the first half, as shown in the drawing, the locking pieces 18a, 18 are cut obliquely toward the rear side.
b is projected to the left and right.

The piston rod 12 on which the locking pieces 18a and 18b are erected in this manner has a through hole provided at the center of the lid 5 and an outer cylindrical shape provided on the inner surface of the center of the lid 5. Is arranged so as to penetrate through the guide body 21.

The lid 5 and the guide 21 are shown in FIG. 2 (a).
Is shown in On the inner surface of the peripheral portion of the lid body 5, as described above, the screwing portion 2 for screwing into the rear opening of the cylinder 3.
2 is formed, and the coil spring 9 is provided on the inner peripheral side thereof.
2B in which an annular support rib 23 for supporting the base end side of the lid 5 is provided, and the lid 5 is viewed from the outer side in the center.
As also shown in FIG.
Rectangular openings 25a, 25 cut out on both sides of the diameter of 4
A through hole 26 composed of b and b is provided. The guide body 21 is provided at the center of the inner surface of the lid body 5 so as to surround the through hole 26.

The guide body 21 is shown in an enlarged scale in FIG. The guide body 21 has an outer cylindrical shape as described above, and inside the cylinder, the two rectangular openings 2
A base end (lower side of FIG. 3B) fixed to the lid body from a front end (upper side of FIG. 3B) of the guide body 21 so as to surround the circular opening 24 excluding 5a and 25b. The inclined surface 27a that reduces the inner diameter of the guide body 21 toward
Two facing slopes 28a, 28 whose thickness gradually increases from the distal end to the proximal end so that 27b is formed.
b is provided. The guide body 2 is sandwiched between the side ends of the inclined hills 28a and 28b and is located on the inner side surface of the guide body 21 at a position corresponding to the rectangular openings 25a and 25b.
Grooves 29a and 29b extending from the base end portion to the tip end portion of No. 1 are formed. Side slopes 30 are provided on the side ends of the inclined hills 28a and 28b, respectively, so that the widths of the grooves 29a and 29b gradually increase from the base end of the guide body 21 toward the tip. (See FIG. 3 (c)). The side surface of the guide body 21 is as shown in FIG.

The groove portions 29a, 29 of the guide body 21 as described above.
b and the rectangular openings 25a and 25b of the lid 5 are passed by the locking pieces 18a and 18b, and the circular openings 24 are passed by the ribs 15a and 15b constituting the piston rod 12. The operation for such passage is shown in FIG. First, in the state where the locking pieces 18a and 18b exist inside the cylinder 3 as shown in FIG. 1, the handle 17 is held against the urging force of the coil spring 9, and the piston rod 12 and the piston 6 are held. When pulled so as to be pulled toward the rear part of the cylinder 3, for example, the locking pieces 18a, 18b provided on the piston rod 12 in the state shown in FIG.
Contact 27b. These inclined surfaces 27a and 27b are provided so as to be inclined so that the inner diameter of the guide body 21 is gradually narrowed, and the contact sides of the locking pieces 18a and 18b are cut obliquely. The locking pieces 18a, 18b are acted so as to be tightened on the inclined surfaces 27a, 27b. Here, when the piston rod 12 is rotated by a certain angle, as shown in FIG. 4B, the locking pieces 18a, 18b move into the groove portions 29a, 29.
It moves along the side inclined surface 30 so as to slide down to b, and its rotation is promoted. As a result, the piston rod 12 is smoothly rotated to the position shown in FIG. 4C, and the locking pieces 18a, 18b are able to penetrate the rectangular openings 25a, 25b. Incidentally, the inclined surfaces 27a, 27
Since the ridge line portion 31 formed by b and the side inclined surface 30 is chamfered, the locking pieces 18a and 18b are provided with the groove portion 29.
It slides down to a and 29b smoothly.

In the state shown in FIG. 4 (c), the piston rod 12 is pulled further rearward until the locking pieces 18a, 18b come out of the lid 5, and then the piston rod 12 is pulled out. When is rotated, as shown in FIG. 5, the locking pieces 18a and 18b are fixed to the outer surface of the lid 5 against the biasing force of the coil spring 9.
In order to stabilize this fixed state, as shown in FIG. 2B, a fixing concave portion 32 in which the locking pieces 18a and 18b are fitted in a portion surrounding the through hole 26 on the outer surface of the lid body 5 is formed.
It is preferable to provide a and 32b. In addition, the handle 1
A string 7 is passed through to prevent the drop when the repair material injection device 1 is attached to a predetermined repair wall surface.

As mentioned above, it is obvious that the present invention can be variously modified. Such modifications do not depart from the spirit and scope of the invention and all such modifications and changes that are obvious to those skilled in the art are included in the claims.

[Brief description of drawings]

1A and 1B are views showing a repair material injection device of the present embodiment, where FIG. 1A is a side sectional view and FIG. 1B is a front view.

FIG. 2 is a view showing a lid of the repair material injection device according to the present embodiment.

3A and 3B are views showing a guide body of the repair material injection device of the present embodiment, FIG. 3A is a plan view, and FIG. 3B is a view of A- of FIG.
A line sectional view, (c) is a BB line sectional view of (a), (d)
Is a side view.

FIG. 4 is a diagram showing a relationship between the guide body and the piston rod of FIG.

FIG. 5 is a side sectional view of the repair material injection device according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Repair material injection device 3 Cylinder 4 Nozzle 5 Lid body 6 Piston 9 Coil spring 12 Piston rod 18a, 18b Locking piece 24 Circular opening 25a, 25b Rectangular opening 26 Through hole 27a, 27b Inclined surface 28a, 28b Inclined hill 30 Side part Slope

Claims (4)

[Claims] 1. A cylinder having a nozzle at its tip, a lid body having a through hole in the center and closing a rear end opening of the cylinder, a piston sliding along an inner wall surface of the cylinder, and a rear portion of the piston. And a piston rod extending through the through hole of the lid body on the side and a rear side of the piston in the cylinder and the lid body to urge the piston forward. A repair material injection device including a spring, wherein the piston rod has locking pieces protruding left and right in the middle of a rod-shaped body, and a through hole of the lid body is a cross section of the rod-shaped body and the locking piece. It is composed of a circular opening corresponding to the shape and two rectangular openings cut out at both ends of the diameter of the opening, and is planted so as to surround the through hole on the inner side surface of the lid and has an inner circumference. The side A tubular guide body through which the stone rod passes is provided, and two groove portions that guide the locking piece to the two rectangular openings of the through hole are provided on the inner peripheral side surface of the guide body. The width | variety is wide at the front end side of the said guide body, respectively, The repair material injection device characterized by the above-mentioned. 2. The inner surface of the guide body is inclined at a portion corresponding to the circular opening of the through hole such that the inner diameter of the guide body becomes smaller from the front end portion to the base end portion of the guide body. Two facing slopes whose thickness gradually increases so that a surface is formed are provided, and side slopes are formed by obliquely notching the side ends of these slopes,
The repair material injection device according to claim 1, wherein the groove is formed by being sandwiched between the side inclined surfaces. 3. The repair material injection device according to claim 2, wherein a boundary portion between the inclined surface of the inclined hill and the side inclined surface is chamfered. 4. The locking piece pulled out to the outside of the lid through the through hole is fixed to a region surrounding the through hole on the outer side surface of the lid so as not to rotate around the piston rod. The repair material injection device according to any one of claims 1 to 3, wherein a shallow fixing groove is provided.