JP6227979B2 - Blow test equipment - Google Patents

Description

  The present invention relates to a striking test apparatus using a pendulum hammer.

  As a hitting test apparatus for testing the physical characteristics of a test piece such as plastic, there is one using a pendulum hammer as shown in Patent Document 1 and Patent Document 2. That is, there is one in which the pendulum hammer is held swingably in the upper position, while the test piece is held at a low position in the swing trajectory of the pendulum hammer. In the impact test, the pendulum hammer is swung upward by a predetermined angle (150 degrees in the standard) from the origin position where the pendulum hammer is suspended in a free state. The pendulum type hammer (the tip thereof) is brought into contact with the test piece.

  In a hitting test apparatus using a conventional pendulum hammer, a pivot shaft is held on an upper portion of a base body as a cast heavy article, and the pendulum hammer is attached to the pivot shaft. The test specimen holder is fixed to a low position of the base by a fixing tool such as a bolt.

JP 2000-146791 A JP 2001-59804 A

  By the way, in the pendulum type hammer, the position swung upward from the origin position suspended in a free state by a predetermined angle (150 degrees in the standard) becomes the standby position. At this standby position, the pendulum type hammer is moved by the locking means. It is locked. Then, by releasing the locking by the locking means by manual operation, for example, the pendulum hammer is swung from the standby position toward the test piece.

  In order to perform the test with high accuracy, it is necessary to accurately determine the swing angle from the origin position of the pendulum hammer in the standby position so as to be a predetermined angle in the standard. At the time of shipment of the striking test apparatus, the swing angle at the standby position is 150 degrees corresponding to the predetermined angle. Even if it is adjusted with extremely high precision so that it becomes 0 degree, the swing angle at the standby position may deviate from 150.0 degree, for example, by about 0.1 degree to 0.5 degree, for example, due to long-term use. is there.

  In order to correct the deviation of the swing angle at the standby position, a weight is provided at the base end of the pendulum hammer, and the origin position is corrected by shifting the position of the weight. However, in this case, the position adjustment of the weight is troublesome, and the mounting position of the test specimen holder must be corrected according to the correction of the origin position, and the correction as a whole is extremely troublesome.

  The present invention has been made in view of the above circumstances, and its purpose is to provide a striking test apparatus capable of easily and accurately adjusting the swing angle of a pendulum hammer in a standby position to a predetermined angle. It is to provide.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1,
A pendulum hammer that swings around a pivot shaft provided at the top;
A test piece holder that is provided below the pivot shaft and holds the test piece on the swing trajectory of the pendulum hammer;
Locking means for locking the pendulum hammer at a standby position swung upward by a predetermined angle from an origin position where the pendulum hammer is suspended in a free state;
Have
It said locking means, for adjusting the swing angle at the locked position of the pendulum hammer in the standby position, has a position adjustment mechanism using a screw mechanism,
A base member fixed on an upper surface of a hammer holding base portion holding the rotating shaft; and a pendulum type hammer held in the standby position while being slidably held with respect to the base member. A holding base holding a locking member to be locked,
The position adjustment mechanism includes a screw rod that is rotatable and non-slidable with respect to one of the base member and the holding base, and a screw hole that is formed on the other side and screwed into the screw rod. Configured,
By rotating the screw rod, the holding base is slid with respect to the base member together with the locking member.
It is like that.

According to the above solution, the swing angle of the pendulum hammer at the standby position can be easily adjusted by the adjustment by the position adjustment mechanism. Since this adjustment uses a screw mechanism, fine adjustment is possible. For example, the swing angle is adjusted by a unit of 0.1 degree, and the swing angle at the standby position of the pendulum hammer is adjusted. It is possible to adjust to a predetermined angle on the standard extremely accurately and accurately. In addition to the above, a position adjusting mechanism using a screw mechanism can be configured between the base member and the holding table, and a conventional locking structure can be effectively configured as it is in a portion related to the holding table.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
Wherein the locking member is a swinging-type locking hooks for locking the locking pin provided on the pendulum hammer, it is then way (claim 2 support). In this case, a mechanism using a locking hook is generally adopted as the locking means, but a position adjusting mechanism that effectively uses the locking mechanism using the locking hook can be used.

A return spring that biases the locking hook toward the locking direction is held on the holding table,
A locking mechanism is provided that is held by one of the locking hook and the holding base and acts on the other to restrict the locking hook from being swung in the locking release direction.
(Corresponding to claim 3 ). In this case, it is possible to prevent the locking hook from being inadvertently released from being locked by the lock mechanism while urging the locking hook into the locked state by the return spring. And it can be set as the structure which concentrates and provides this return spring and a lock mechanism in a holding stand part.

An angle sensor connected to the pivot shaft for detecting a swing angle of the pendulum hammer;
A display unit for displaying a detected angle detected by the angle sensor;
Further comprising
The angle sensor can detect an angle in units of 0.1 degree,
The swing angle is displayed on the display unit in units of 0.1 degree.
(Corresponding to claim 4 ). In this case, it is possible to accurately adjust in units of 0.1 degrees so that the swing angle of the pendulum hammer at the standby position is exactly the predetermined angle while observing the detection angle by the display unit.

  According to the present invention, the swing angle of the pendulum hammer in the standby position can be easily and accurately adjusted to a predetermined angle.

1 is an overall perspective view showing an example of a striking test apparatus according to the present invention. FIG. 2 is a front view of the batting test apparatus shown in FIG. 1. The left view of FIG. The front view of a base. The side view of a hammer holding stand. The figure which looked at FIG. 5 from the right side. Partial cross-sectional side view showing a state where a hammer holding base is attached to the base The side view which shows a test piece holding stand with an intermediate member. The figure which looked at the test piece holding stand of FIG. 8 from the right side. The disassembled sectional view of a base, a test piece holding stand, and an intermediate member. The principal part sectional drawing which shows the state which fixed the test piece holding stand with respect to the base via the intermediate member. The principal part front view which shows an example of a latching means and shows the state which has latched the pendulum type hammer. The screw mechanism part comprised by the latching means is shown, Comprising: The enlarged view which shows a part of FIG. 12 in cross section. FIG. 14 is an essential part cross-sectional view in a direction orthogonal to the screw mechanism shown in FIG. 13.

  1 to 3, reference numeral 1 denotes a mounting table, and the mounting table 1 is configured as a stable heavy object by casting an iron-based metal. Legs 2 are provided at the four corners of the bottom surface of the mounting table 1, respectively. Each leg portion 2 is coupled to the mounting table 1 by screwing so that the horizontal state of the mounting table 1 can be adjusted.

  A mounting plate 3 made of, for example, an iron-based metal is fixed to the upper surface of the mounting table 1 with screws or the like so as to extend in the horizontal direction. A plate-like base 10 made of, for example, an iron-based metal extending in the vertical direction is fixed to the mounting plate 3. Specifically, as shown in FIG. 3, a bolt or the like is attached to the mounting plate 3 with the horizontal portion 4 a of the mounting bracket 4 as a strength member having an L-shaped cross section seated on the mounting plate 3. It is fixed by a fixing tool (not shown). Further, the vertical portion 4 a of the mounting bracket 4 is fixed to the base 10 by a fixing tool (not shown) such as a bolt while being seated on the back surface of the base 10. And the back surface side of the base 10 is covered with the cover member 5 which processed the sheet metal including the attachment bracket 4 substantially entirely. The cover member 5 is detachably fixed to the base 1 or the mounting bracket 4 by a fixing tool such as a screw (not shown). A power supply system, a control system, and the like (not shown) are incorporated in the space in the cover member 5. In FIGS. 1 and 2, reference numeral 102 denotes a main power switch.

  As shown in detail in FIG. 4, the base 10 is formed into a generally rectangular shape by machining, for example, an iron-based thick plate material, and in particular, the surface side thereof is precisely machined as one flat surface. Has been. On the surface side of the base 10, a hammer holding base 20 is fixed at a high position as described later. Further, on the surface side of the base 1, a test piece holding base 30 is fixed at the lower position as described later.

  The hammer holding base 20 has a pair of front and rear leg portions 21 and a connecting portion 22 that connects the upper portions of the pair of front and rear leg portions 21, and is generally an integrally molded product made of, for example, an iron-based metal. ing. The hammer holding base 20 is not limited to an integrally molded product, and can be appropriately configured such that the block material divided into a plurality of parts is integrated by fixing with a fixing tool such as a bolt.

  A rotating shaft 23 is rotatably held between the pair of front and rear legs 21 (see FIG. 3). A base end portion of a pendulum hammer 24 is detachably fixed to the rotating shaft 23 using a fixing tool such as a screw. The pendulum hammer 24 has an arm portion 24a, a weight 24b provided at the tip of the arm portion 24a, and a striking portion 24c that comes into contact with the test piece. 1 to 3 show a state in which the pendulum hammer 24 is at the origin position suspended in a free state where no external force acts. The pendulum hammer 24 is locked as described later at a standby position that is swung counterclockwise in FIG. 2 by a predetermined angle (150 degrees in the standard) from the origin position. . The state of being locked at this standby position is shown in FIGS.

  The specimen holder 30 includes a pair of front and rear leg members 31 and a bottom wall member 32 that connects lower ends of the pair of front and rear leg members 31. And on the upper surface of a pair of front and rear leg members 31, a test piece mounting portion 31a and a stopper portion 31b are provided. The stopper portion 31b regulates the movement of the test piece (not shown) placed on the placement portion 31a from the origin position in the direction opposite to the standby position. The test piece placed so as to straddle the pair of front and rear placement parts 31a is positioned on the swinging locus of the pendulum hammer 24 (more specifically, the striking part 24c). Yes. The pair of leg members 31 and the connecting member 32 are assembled with high accuracy and configured as a single block body as a whole, but may be configured as an integral molded product.

  Next, a method for fixing the hammer holding base 20 to the base 1 will be described with reference to FIGS. First, in FIG. 7, the rotation shaft 23 is held by the hammer holder 20 so as to be rotatable via bearings 43 and 44 so as to straddle the pair of front and rear legs 21. In FIG. 7, 45 and 46 are bearing holders. A portion between the pair of front and rear leg portions 21 of the rotation shaft 23 is an attachment portion 23a to which the pendulum hammer 24 is detachably fixed. In the embodiment, the cross-sectional shape of the mounting portion 23a is a square shape, and a concave portion having a square cross section formed at the base end portion of the pendulum hammer 24 is fitted without rattling. When fixed by a fixing tool, the relative rotation is surely restricted.

  A cylindrical convex portion 42 centering on the axis of the rotation shaft 23 is formed on the surface of the hammer holding base 20 facing the base 1 side. The convex portion 42 is formed so as to have a predetermined positional relationship with respect to the rotation shaft 23 with high accuracy. In addition, the surface closely_contact | adhered to the base 1 among the hammer holding bases 20 is finished into a flat surface with high accuracy.

  On the other hand, the base 1 is formed with a circular opening 41 centered on the axis of the rotation shaft 23. As for this opening part 41, the attachment surface side of the hammer holding stand 20 is made into the large diameter part 41a. The convex portion 42 of the hammer holding base 20 is fitted to the large diameter portion 41a without rattling (see FIG. 7). The convex portion 42 and the large-diameter portion 41a constitute a hammer-side positioning means, and the positioning of the rotary shaft 23 with respect to the base 1 is automatically performed in a state where the convex portion 42 and the large-diameter portion 41a are fitted. Done. Of course, the convex portion 42 and the large-diameter portion 41a as the concave portion are finished with high precision.

  As shown in FIG. 7, the rotating shaft 23 extends to the back side of the base 1 through the opening 41, and an encoder 47 as an angle sensor is attached thereto. In FIG. 7, reference numeral 48 denotes an encoder mounting disk. The encoder 47 can finely detect the swing angle of the pendulum hammer 24 in units of 0.1 degrees, for example. The angle detected by the encoder 47 is displayed on the display unit 6 (see FIGS. 1 and 2) that is a thin display provided on the front surface of the mounting table 1.

  In the base 1, a plurality of bolt holes 49 for fixing the hammer holding base 20 to the base 1 are formed around the opening 41 (see FIG. 4). On the other hand, a through hole 50 that is aligned with the bolt hole 49 is formed in the hammer holding base 20, and a bolt that is screwed into the bolt hole 49 through the through hole 50 is denoted by reference numeral 50 in FIG. 1.

  Next, a method for fixing the test piece holding base 30 to the base 1 will be described with reference to FIGS. 4 and 8 to 11. First, the test piece holder 30 is attached to the base 1 via two intermediate members 61 and one collar member 62. For this reason, the base 1 is formed with two bolt holes 63 on the left and right and one bolt hole 68 at a slightly higher position between the two bolt holes 63 at the lower position (see FIG. 4). .

  Of the two bolt holes 63, the mounting surface side of the test piece holding base 30 is a circular large diameter portion 63 a concentric with the bolt hole 63. Further, a circular opening 64 is formed on the test piece holding base 30 on the mounting surface side to the base 1. A large-diameter portion 64 a is formed on the side of the opening 64 where the base 64 is attached. As will be described later, the large-diameter portion 64a is used for positioning, and therefore, the large-diameter portion 64a is processed with high precision so that the positional relationship of the test piece with respect to the placement portion 31a becomes a predetermined relationship.

  On the other hand, the intermediate member 61 has a cylindrical shape, and circular convex portions 61a and 61b are formed on the respective end surfaces. The convex portion 61a is fitted to the large diameter portion 63a of the base 1 without rattling. Further, the convex portion 61b is fitted to the large diameter portion 64a of the test piece holding base 30 without rattling. Each large diameter part 63a, 64a and each convex part 61a, 61b constitute a test piece side positioning means, and in the state of FIG. The assembling positional relationship of the mounting portion 31a) with respect to the base 1 is set to a predetermined positional relationship. Of course, each large diameter part 63a, 64a and each convex part 61a, 61b are finished with high precision.

  The large-diameter portion 63a as the positioning means for the test specimen holding base 30 formed on the base 1 is formed to have a predetermined dimensional relationship with the large-diameter portion 41a as the positioning means for the hammer holding base 20. Yes. As a result, the positional relationship between the pivot shaft 23 of the pendulum hammer 24 and the test piece mounting portion 31a formed on the test piece holding base 30 is automatically set to have a predetermined relationship (1/1000 mm). Ensuring positional relationship by processing accuracy in units). That is, in a state in which the pendulum hammer 24 is at the origin position, the position is just before the striking portion 24c of the pendulum hammer 24 comes into contact with the test piece placed on the placement portion 31a. The relationship will be automatically secured.

  The test piece holder 30 is fixed to the base 1 as follows. That is, the bolt 65 passes through the opening 64 and the intermediate member 61 at the shaft portion, and the male screw portion 65 a formed at the tip portion is screwed into the bolt hole 63 of the base 1. Further, the bolt 1 (see FIG. 3) penetrating the collar member 62 is screwed into the bolt hole 68 of the base 10 to fix the base 1 (in the embodiment, a total of three places). It is bolted).

  The concentric large-diameter portion 68a is also formed in the bolt hole 68 (see FIG. 4), while the collar member 62 is formed with a circular convex portion 62a that fits the large-diameter portion 62 without rattling. However, the large diameter portion 68a and the convex portion 62a are not directly involved in positioning. Further, a service hole 67 is formed in the leg member 31 on the side farther from the base 1 in the test piece holding base 30 on the extended line of the opening 64 (see FIGS. 1, 2, and 10). . Using this service hole 67, an elongated tool for passing the bolt 65 or rotating the bolt 65 is inserted. Similarly, a service hole 69 for a bolt 66 that is screwed into the bolt hole 68 is also provided (see also FIGS. 1 and 2).

  In FIG. 4, the combination of the two bolt holes 63 and one bolt hole 68 described above is formed at a position higher by one set for fixing the test specimen holding base 30. That is, a bolt hole corresponding to the two bolt holes 63 that also serves for positioning is indicated by reference numeral 73, and a bolt hole corresponding to the bolt hole 68 is indicated by reference numeral 78. Of course, a large diameter portion 73a (corresponding to 63a) is also formed in the bolt hole 73 for positioning.

  When the pendulum hammer 24 fixed to the rotation shaft 23 is changed to a short one, the test piece holding base 30 is fixed to the base 1 using the bolt holes 73 and 78. The positional relationship between the rotating shaft 23 and the test piece mounting portion 31a is automatically obtained by using the bolt hole 73 (the large diameter portion 73a) having a positioning function as in the case of using the long pendulum hammer 24. Secured. In FIG. 4, reference numeral 70 denotes a bolt hole for fixing the base 1 to the bracket 4 (see FIG. 3) described above.

  Next, a locking mechanism K that locks the pendulum hammer 24 in the standby position will be described with reference to FIGS. The locking mechanism K includes a cover member 100 that is processed for safety (see FIGS. 1 and 2). FIGS. 12 and 13 show the state in which the cover member 100 is removed. . In FIG. 12, a one-dot chain line indicating the origin position of the pendulum hammer 24 is indicated by a symbol α, a one-dot chain line indicating a standby position is indicated by a symbol β, and a predetermined angle formed by the turning position α and the standby position β is indicated by a symbol θ. It is shown by.

  First, the locking mechanism K is held so as to be slidable with respect to the bracket 80 fixed to the upper surface of the hammer holding base 20, the base member 81 fixed to the bracket 80, and the base member 81 as described later. A holding base 82 and a locking hook 84 held on the holding base 82 so as to be swingable about a rotation shaft 83 are provided.

  The locking hook 84 is urged to swing in the clockwise direction in FIGS. 12 and 13 by a return spring 85 formed of a coil spring interposed between the holding base 82 and the holding hook 82. Then, the tip of the stopper screw 86 screwed into the locking hook 84 abuts on the holding base 82, so that it is restricted from swinging clockwise more than a predetermined amount.

  A locking claw 87 is formed at the tip of the locking hook 84. The locking claw portion 87 has a cam surface 87a inclined on the distal end surface side, and a locking portion 87b on the inner side closer to the base end portion side than the cam surface 87a. A locking pin 24d protruding from the side surface of the tip of the pendulum hammer 24 is locked to the locking portion 87b. In other words, when the pendulum hammer 24 is swung from the origin position to the standby position, when the pendulum hammer 24 comes close to the standby position, the locking pin 24d comes into contact with the cam surface 87a, and the locking hook 84 is moved to the return spring 85. It is rocked counterclockwise in FIGS. 12 and 13 against the urging force. Then, as the swinging of the locking hook 84 proceeds, the locking pin 24d will eventually come off the cam surface 87a and be positioned at the locking portion 87b. At this time, the locking hook 84 is swung clockwise in FIGS. 12 and 13 by the urging force of the return spring 85, and the state in which the locking pin 24d is locked to the locking portion 87b is maintained. It will be.

  When the operation portion 84a at the base end portion of the locking hook 84 is pressed by manual operation and the locking hook 84 is swung against the urging force of the return spring 85, the locking pin 24d is moved to the locking portion 87b. The pendulum hammer 24 is swung toward the origin position by its own weight.

  As shown in FIGS. 13 and 14, the holding base 82 is fitted to the base member 81 so as to be slidable and non-rotatable in the substantially longitudinal direction of the locking hook 84. That is, a guide groove 81a having a square cross section is formed on the upper surface of the base member 81, while a protrusion 82a having a square cross section that fits in the guide groove 81a without rattling is formed on the lower end of the holding base 82. Has been.

  A screw rod 90 is held on the base member 81 as being rotatable and non-slidable. The rear end portion of the screw rod 90 (the end portion opposite to the locking claw portion 87) protrudes from the base member 1, and the protruding portion to the outside has a large diameter rotation that is manually operated. The operation unit 91 is provided.

  The screw rod 90 is screwed into a screw hole 92 formed in the holding base 82 (projection portion 82a thereof). As a result, by rotating the rotation operation unit 91 forward and backward, the holding base 82, that is, the locking hook 84 is displaced with respect to the base member 81, and the displacement position is adjusted using a screw mechanism. Therefore, fine adjustment is possible.

  Here, for example, when the arm portion 24a of the pendulum hammer 24 is slightly deformed due to long-term use, the swing angle between the pendulum hammer 24 at the opposed position β and the origin position is a predetermined angle ( In some cases, the standard is slightly deviated from 150 degrees (for example, about 0.1 degree from a predetermined angle). On the display unit 6 provided on the mounting table 1, for example, “150.1 degrees” which is the shifted angle is displayed. When such a shift occurs, the rotation operation unit 91 is rotated and the position of the locking hook 84 may be finely adjusted (the display unit 6 is finely displayed so that “150.0 degrees” is displayed). adjust). As described above, by the rotation operation by the rotation operation unit 91, the swing angle from the origin position of the pendulum hammer 24 in the standby position can always be maintained at a predetermined angle.

  A lock screw 93 is screwed onto the base member 81 so as to be able to contact the side surface of the protrusion 82a of the holding base 82 (see FIG. 14). The adjustment using the rotation operation unit 91 described above is performed in a state where the lock screw 93 is loosened, and the lock screw 93 is tightened in a state where a predetermined angle is secured at the rod standby position.

  The locking hook 84 is provided with a lock mechanism 95 for disabling the locking release operation. The lock mechanism 95 has a cam member 96 rotatably held on the side surface of the locking hook 84, and an operation portion 97 is projected from the cam member 96 toward the radially outer side. Yes. The lock mechanism 95 further includes a pair of stopper portions 97 and 98 protruding from the side surface of the locking hook 84 with the cam member 96 interposed therebetween.

  The outer peripheral surface of the cam member 96 has an arcuate portion 96b centered on the rotation center 96a and a flat portion 96c having a distance from the rotation center 96a smaller than the arcuate portion. 12 and 13 in which the operating portion 97 is in contact with the stopper portion 99, the flat portion 96c of the cam member 96 is positioned to face the upper surface of the holding base 82, and the flat portion 96c and the holding base 92 are in contact with each other. A sufficient interval is secured, and the locking hook 84 can swing in the locking release direction (lock release position).

  On the other hand, when the operation part 97 is in contact with the stopper part 98, the arcuate part 96 b is positioned below and faces the upper surface of the holding table 82. At this time, the arcuate portion 96b is in a position that protrudes greatly downward from the lower surface of the locking hook 84, and is in contact with or close to the upper surface of the holding table 82. As a result, even if the locking hook 84 is swung in the unlocking direction, the arcuate portion 96b is brought into contact with the upper surface of the holding base 82, so that the swinging of the locking hook 84 is restricted. (Locked state).

  The test using the hitting test apparatus as described above is performed in the same manner as before. That is, in a state where the pendulum hammer 24 is locked at the standby position using the locking mechanism K, the test piece is mounted on the mounting portion 31a. When the locking function by the locking mechanism K is released in this state, the pendulum hammer 24 is swung by its own weight, and the test piece is hit by the hitting portion 24c. The maximum swing angle of the pendulum hammer 24 after hitting (the swing angle from the origin position after the origin position) is displayed on the display unit 6 (can also be stored in the storage means). . From the displayed maximum swing angle and the fractured state of the test piece, the physical properties and the like of the test piece are verified. When a short pendulum hammer 24 is used, the long pendulum hammer 24 is removed from the rotating shaft 23 and the short pendulum hammer is fixed instead, and the specimen holder 30 is placed at a high position (on the rotating shaft 23). Change to a close position.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and can be appropriately changed within the scope described in the scope of claims. For example, the invention includes the following cases. . The test piece holding base 30 is not limited to the case where the test piece is placed in a state where it is placed. For example, the test piece holding base 30 may be an appropriate one such as a means for firmly holding the test piece using a screw mechanism. Can be used. The change in the vertical position of the test specimen holding base 30 relative to the base 10 may be three or more, or the vertical position may not be changed.

  You may make it perform positioning with respect to the base 1 of the hammer holding stand 20 by two or more uneven | corrugated fitting. In addition, the test piece holder 30 may be positioned only at one place (in this case, it is preferable to use irregular fittings with irregular shapes so as not to rotate), or by carrying out irregular fittings at three or more places. It may be. The positioning of the test piece holding base 30 on the base 1 may be performed without using the intermediate member 61. In this case, for example, with respect to the positioning recess formed on the base 1, the test piece What is necessary is just to make it fit the positioning convex part formed in the holding stand 30 directly.

  The hammer holding table 20 may be positioned on the base 1 via a member corresponding to the intermediate member 61 as in the case of the test piece holding table 30. The member formed with the concave and convex portions for positioning that are fitted to each other may have a relationship opposite to that of the embodiment (for example, while forming the convex portion on the base 1, the hammer holding base 20, the test A recess is formed in the piece holding base 30). The concave and convex portions for positioning are not limited to a circular shape, and the shape thereof is not limited, for example, a rectangular shape. Instead of forming the positioning recess (or projection) using the bolt hole, the bolt hole and the positioning recess (or projection) may be formed separately and independently.

  A structure in which the hammer holding base 20 is formed integrally with the base 10 may be used. Moreover, the thing of the structure which formed the test piece holding stand 30 integrally with the base 10 may be sufficient. For example, a part that corresponds to the base 10, a part that corresponds to the hammer holding base 20, and a part that corresponds to the test piece holding base 30 are integrally formed by casting, and a part that requires precision by subsequent machining. It is also possible to perform position setting processing and finishing processing.

  Since the screw mechanism for adjusting the swing angle when the pendulum hammer 24 is in the standby position only needs to be able to change the relative positional relationship of the holding base 82 with respect to the base portion 81, the screw rod 90 can be rotated to the holding base 82. In addition, the base member may have a structure in which the screw hole 92 into which the screw rod 90 is screwed is formed in the base member while being held slidably.

  The shape of the base 1 is not limited to a plate shape, and an appropriate shape can be selected. For example, the base 1 may be used by being fixed to a pillar or wall of a building without being used by being fixed to the mounting table 1 which is a heavy object. A balance weight may be provided at the base end of the pendulum hammer 24 so that the position of the pendulum hammer 24 can be adjusted, so that the swing angle between the pendulum hammer 24 and the vertical line when the pendulum hammer 24 is at the origin can be finely adjusted.

  An electromagnetic solenoid is attached to the holding base 82 of the locking mechanism K at a position corresponding to the vicinity of the operation portion 84a of the locking hook 84. When the locking is released, the electromagnetic solenoid is excited to lock the locking hook 84. It may be driven to swing in the release direction. In this case, in order to prevent inadvertent excitation of the electromagnetic solenoid, two command switches 101 are provided on the mounting table 1 (see FIGS. 1 and 2), and the two command switches 101 are operated simultaneously. It is preferable to set so that only the electromagnetic solenoid is excited. The locking mechanism K is not limited to the case where the swinging locking hook 84 is used, and an appropriate structure is adopted as long as the pendulum hammer 24 can be locked and released at the standby position. can do. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention can provide a suitable hitting test apparatus using a pendulum hammer.

1: mounting table 6: display unit 10: base 20: hammer holding table 23: rotating shaft 23a: mounting unit 24: pendulum hammer 24a: arm unit 24b: weight 24c: striking unit 24d: locking pin 30: Test piece holder 31a: Placement part (for test piece)
31b: Stopper portion 41: Opening portion 41a: Large diameter portion (for positioning the hammer holding base)
42: Convex (for positioning the hammer holder)
47: Encoder (angle sensor)
61: Intermediate member 61a: Convex part (for positioning the specimen holder)
61b: Convex part (for positioning the specimen holder)
63: Bolt hole 63a: Large-diameter portion (for positioning the specimen holder)
64: Opening 64a: Large-diameter portion (for positioning the specimen holder)
73: Bolt hole 73a: Large-diameter portion (for positioning the test specimen holder, corresponding to 63a)
78: Bolt hole 78a (for positioning the specimen holder, 68a compatible)
K: Locking mechanism (locking means)
81: Base member 81a: Guide groove 82: Holding stand 82a: Protruding part 83: Rotating shaft 84: Locking hook 85: Return spring 90: Screw rod 91: Rotating operation part 92: Screw hole 93: Lock screw 95: Lock mechanism

Claims (4)

A pendulum hammer that swings around a pivot shaft provided at the top;
A test piece holder that is provided below the pivot shaft and holds the test piece on the swing trajectory of the pendulum hammer;
Locking means for locking the pendulum hammer at a standby position swung upward by a predetermined angle from an origin position where the pendulum hammer is suspended in a free state;
Have
It said locking means, for adjusting the swing angle at the locked position of the pendulum hammer in the standby position, has a position adjustment mechanism using a screw mechanism,
A base member fixed on an upper surface of a hammer holding base portion holding the rotating shaft; and a pendulum type hammer held in the standby position while being slidably held with respect to the base member. A holding base holding a locking member to be locked,
The position adjustment mechanism includes a screw rod that is rotatable and non-slidable with respect to one of the base member and the holding base, and a screw hole that is formed on the other side and screwed into the screw rod. Configured,
By rotating the screw rod, the holding base is slid with respect to the base member together with the locking member.
A striking test apparatus characterized by that. In claim 1,
Said locking member, said there is a swing-type locking hooks for locking the locking pin provided on the pendulum hammer, percussion-type test device, characterized in that. In claim 2 ,
A return spring that biases the locking hook toward the locking direction is held on the holding table,
A locking mechanism is provided that is held by one of the locking hook and the holding base and acts on the other to restrict the locking hook from being swung in the locking release direction.
A striking test apparatus characterized by that. In any one of Claims 1 thru | or 3 ,
An angle sensor connected to the pivot shaft for detecting a swing angle of the pendulum hammer;
A display unit for displaying a detected angle detected by the angle sensor;
Further comprising
The angle sensor can detect an angle in units of 0.1 degree,
The swing angle is displayed on the display unit in units of 0.1 degree.
A striking test apparatus characterized by that.